1 SimGrid (3.23) NOT RELEASED (Release Target: June 21. 2019, 15:54 UTC)
6 Fixed bugs (GH=GitHub; FM=FramaGit):
7 - GH#326: Valgrind-detected error for join() when energy plugin is activated
8 - FM#10: Can not use MSG_process_set_data from SMPI any more
10 ----------------------------------------------------------------------------
12 SimGrid (3.22) April 1. 2019
14 The Easter Chrismas Release (this one is somewhat late).
17 - We are excited to introduce the SimGrid/S4U interface to your neighborhood
18 - Not complete yet: asynchronous activities (amongst others) are still missing
19 - Still ongoing: the interface may change in the future. We need more
20 testers! Please report any glitches.
21 - No new project using Java should start now. Please switch to Python.
24 - Some of the internal cleanups may lead to speed improvements:
25 - The hard limitation on the amount of simulated actors with
26 Java+Mac was removed. Now, the available memory is the only limit.
27 - Our refcounting was tidyied, leading to 10% speedups in some cases.
28 - We are still working on making our code robust to the actor kills
29 and hosts' churn. Things are improving, but it's not perfect yet.
30 - Replaced our own code to display a backtrace (that was forking addr2line)
31 with the Boost.Stacktrace library.
32 You won't see your backtraces without this optional dependency.
33 - Bump cmake dependency to 3.5 (provided by Ubuntu 16.04).
34 - Stop setting random seed with srand() at initialization.
37 - In <host> and <peer>, 'availability_file' is now 'speed_file'.
38 XML file version remains 4.2 since old files are still compatible.
41 - Process termination which was broken at version 3.21 has been repaired.
42 - Expose host load plugin: loadInit, getCurrentLoad, getComputedFlops, getAvgLoad
43 - Hide the examples into examples/deprecated. New users should use Python.
46 - Drop MSG_process_create_from_stdfunc() from the API.
47 This C++ function was a pimple in the C API, made necessary at some
48 point by the Java bindings. This is fixed now.
49 - Hide the examples into examples/deprecated. New users should use S4U.
50 - MSG_process_create and MSG_process_attach now crash if the host used
51 to run this process is off.
52 - Fix the protype of MSG_process_on_exit()
53 Now use (int,void*) callbacks instead of (void*,void*) ones.
54 The implementation was ways too messy to actually work, I guess.
57 - Change the way SMPI_SAMPLE_* macros work to avoid invalidating cache
58 too often and provide more accurate timings.
59 - Add -gdb, -lldb, and -vgdb shortcuts to help debug MPI codes with smpirun
60 - MPI_Alltoallw support
61 - Partial MPI nonblocking collectives implementation: MPI_Ibcast, MPI_Ibarrier,
62 MPI_Iallgather, MPI_Iallgatherv, MPI_Ialltoall, MPI_Ialltoallv, MPI_Igather,
63 MPI_Igatherv, MPI_Iscatter, MPI_Iscatterv, MPI_Ialltoallw, MPI_Ireduce,
64 MPI_Iallreduce, MPI_Iscan, MPI_Iexscan, MPI_Ireduce_scatter,
65 MPI_Ireduce_scatter_block, with fortran bindings.
66 - MPI_Request_get_status, MPI_Status_set_cancelled, MPI_Status_set_elements
67 support, MPI_Comm_get_name, MPI_Comm_set_name
68 - Basic implementation of generalized requests (SMPI doesn't
69 allow MPI_THREAD_MULTIPLE) : MPI_Grequest_complete, MPI_Grequest_start
72 - Drop sg_cmdline. Please use xbt_cmdline instead.
73 - Drop the C xbt_os_mutex_t; Use the C++11 std::mutex.
74 - Drop the C xbt_os_sem_t; Use the C++ xbt::OsSemaphore.
75 OsSemaphore is implemented in a portable way with C++11 threads.
76 This should allow much more threads to be created at the same time,
77 allowing Mac and Java users to simulate many more actors.
78 - Implement the 'thread' factory with std::thread instead of xbt ones.
79 It is not possible to set the stack size with threads anymore, but
80 -fsplit-stack is the way to go nowadays when using threads.
81 - Drop the xbt_os_thread_t module (now unused)
82 - Drop xbt_ex_display(), use simgrid::xbt::log_exception() instead.
83 - Drop xbt_str_join_array().
84 - Drop cunit, use Catch2 instead.
87 - Many cleanups in the kernel::activity namespace. This was long
88 overdue, and shall open the path to many future endeavors.
91 - #132: Java: a process can not shut down its own host
92 - #220: S4U: detached send causes exception if sender terminates soon after sending
93 - #261: Document the parameters of parallel execution's constructor
94 - #300: [s4u] BarrierPtr is missing
95 - #314: SMPI args internal cleanup
96 - #316: Fix a bug related to the CPU utilization of multi-core VM
97 - #318: Invalid trace file when using option --cfg=tracing/smpi/display-sizes:yes
98 - #324: S4U: Attempting to create an actor on turned off host segfaults instead of throwing
99 - #325: Turning off a host has different behavior on sleeping actors and computing actors
101 ----------------------------------------------------------------------------
103 SimGrid (3.21) October 3. 2018
105 The Restarting Documentation (TRD) Release.
108 - Convert the user manual to Sphinx for improved usability.
109 Unstable version now hosted on https://simgrid.frama.io/simgrid
110 Many glitches remain; stay tuned.
111 - Restrict the Doxygen reference API to the installed header files.
112 (documenting all internals this way is overkill + doxygen scales badly)
113 - New tutorial on S4U (highly inspired from the old MSG one, but with
114 a git repository to fork as a starting point, and a docker image)
115 - Started but not finished a SMPI tutorial inspired from the JLPC'14 one.
116 - The Developper manual is still to be converted (not compiled until then)
117 - Some parts are still missing in this conversion (such as the
118 platform and deployment sections) while others were blindly converted
119 and would need more love (such as the configuration flags).
120 Things will certainly further improve in the future releases.
123 - Fully reimplement auto_restart mechanism that was utterly broken
124 (fix #22, #131 and #281 that were all very related)
125 - Implement semaphores (fix #303 and #291)
126 - When creating an actor from a function and its parameters,
127 move-only parameters are not allowed anymore, as it would prevent
128 the actor to be restartable if its parameters are consumed on run.
129 - s4u::Io: IOs go asynchronous as activities. New methods in s4u::Storage:
130 - io_init(sg_size_t, s4u::Io::OpType) to create a READ or WRITE asynchronous
131 IO operations that can be started, waited for, or canceled as a regular
133 - read_async(sg_size_t) and write_async(sg_size_t) which are wrappers on
137 - Rename 'power' and 'power_used' variables into 'speed' and 'speed_used'
138 - New host variable: 'core_count'
141 - Remove xbt_os_thread_specific features
142 - Remove portability wrapper to condition variables
143 - Remove xbt_os_thread_yield()
146 - MPICH collective selector now mimics MPICH 3.3b
147 - OpenMPI collective selector now mimics OpenMPI 3.1.2 (default "tuned" setting)
148 - MPI_Init(NULL,NULL) is now allowed
149 - smpi/wtime option now injects time in gettimeofday or clock_gettime calls
150 - Command-line arguments should now be handled properly in Fortran simulations
151 - MPI Attributes and related callbacks should work in Fortran
152 - Apps using C + Fortran should now work
153 - MPI_* calls now check for non MPI_SUCCESS return values and emit warnings
154 - Support MPI_Error_String
157 - Due to an internal bug, Msg.run() must now be your last line.
158 We hope to fix it in a future release, and we are sorry for the inconvenience.
161 - #22: Process autorestart seem to only work with CAS01 cpus
162 - #56: Feature request: dynamic SMPI replay
163 - #93: simgrid should not eat --help
164 - #111: How to change the loopback link characteristics?
165 - #116: Platform cluster radical
166 - #117: Platform cluster/host order
167 - #129: Replay_multiple on steroid
168 - #131: Java : autostart does not work
169 - #143: Setting a breakpoint at a given time
170 - #235: Network energy models should be integrated
171 - #264: Add ptask L07 resource tracing
172 - #271: Dynamic and manual replay of SMPI traces
173 - #279: Breakpoints option uses time deltas instead of absolute time
174 - #281: Daemonized actor no longer daemonized after an auto-restart
175 - #282: TIT convertor erase traces when using absolute path in the trace list file
176 - #285: segfault when a s4u actor kills itself with msg process tracing activated
177 - #286: Pajé traces are not exposing the number of cores
178 - #287: Command-line parsing should stop when encountering '--'
179 - #288: MPI_Init(NULL, NULL)
180 - #289: Improve documentation of Actor::on_destruction and this_actor::on_exit()
181 - #290: Method to check if a mailbox has a message ready to be consumed
182 - #291: [s4u] semaphores do not seem available yet
183 - #294: Alltoall collective implementation of mpich
184 - #295: Starting a Host as OFF is not supported
185 - #296: DTD too permissive
186 - #299: Add a s4u barrier example
188 ----------------------------------------------------------------------------
190 SimGrid (3.20) Released June 24. 2018
192 The proxy snake_case() release.
195 - The whole API is now using snake_case() instead of mixing it with camelCase.
196 Compatibility wrappers in place for one year.
197 - We took the opportunity to increase the consistency of the API.
198 Please report any remaining glitches.
199 - New function simgrid::s4u::Host::get_actor_count:
200 Returns the number of actors running on a specific host.
203 - SMPI is now tested with ~45 proxy apps from various sources, with none or
204 only minor patching needed: check https://github.com/simgrid/SMPI-proxy-apps
205 - Replay: The replay file has been re-written in C++.
206 - Replay: Tags used for messages sent via MPI_Send / MPI_Recv are now
207 supported. They are stored in the trace and used when replayed.
208 - Basic support of MPI_Cancel. Robustness not guaranteed.
209 - Support of MPI_Win_allocate_shared, MPI_Win_shared_query, MPI_Comm_split_type
210 (only for MPI_COMM_TYPE_SHARED).
211 - New option: smpi/privatize-libs, to add external shared libs to be privatized
212 by SMPI. They will be copied locally and loaded separately by each process.
213 Example --cfg=smpi/privatize-libs:"libgfortran.so.3;libscalapack.so".
214 - Tracing: add tracing for MPI_Start, Startall, Testall, Testany
215 - Interception of getopt, getopt_long and getopt_long_only calls to avoid issues
216 with internal index optind with multiple processes. Only works if MPI_Init has
218 - Fortran: SMPI builds a mpi.mod file which should allow use of "use mpi"
219 syntax without preprocessing tricks.
222 - Change --cfg=tracing/msg/vm to --cfg=tracing/vm as virtual machine
223 behavior tracing is no longer limited to MSG
224 - TIT (Time Independent Traces): We finally support tags. Unfortunately,
225 this means that traces now need to be updated or re-obtained; both Irecv
226 and Isend lines in your traces have now in total 5 mandatory fields:
227 <rankid> <command> <to/from rankid> <tag> <size>
228 To update your traces, it suffices to add a 0 for the tag here.
229 - TIT now also supports waiting for a distinct request via MPI_Wait.
230 Wait/Test now wait for a specific request, not just the last one that was
231 issued. This unfortunately means another update, because we need to
232 identify which request you want to wait for. We do this via the
233 triplet (sender, receiver, tag), which needs to be added:
234 <rankid> <command> <sender> <receiver> <tag>
235 - Actions are now in lower case (e.g., "allReduce" becomes "allreduce").
236 New script simgrid_convert_TI_traces.py: upgrade your TI traces.
239 - The deprecation of MSG is ongoing (but this should not impact you).
240 Many MSG functions are now simple wrappers on the C API of S4U. If
241 you wish to convert your code to S4U, find the S4U counterparts of
242 your MSG calls in src/msg/msg_legacy.cpp.
243 - MSG can still be used, but won't evolve anymore.
246 - Allow to run the Link energy plugin from the command line with
247 --cfg=plugin:link_energy
248 - Rename Energy plugin into host_energy
249 - Rename Load plugin into host_load
252 - Add parameter --cfg=simix/breakpoint to raise a SIGTRAP at given time.
253 - kill simix::onDeadlock() that was somewhat dupplicating s4u::on_deadlock()
254 - Improve performance when handling timeouts of simix synchros.
257 - Config: the C API is now deprecated (will be removed in 3.23), and
258 the C++ API has been slightly improved.
261 - Fix several build issues on OSX.
262 - Move simgrid_config.h to simgrid/config.h (old header still working)
265 - #143: Setting a breakpoint at a given time
266 - #150: Inconsistent event names in SMPI replay
267 - #258: daemonized actors hang after all non-daemonized actors have completed
268 - #267: Linker error on unit_tmgr
269 - #269: SMPI: tracing of MPI_Wait/all/any broken
270 - SMPI: Fix various crashes with combined use of MPI_PROC_NULL and MPI_IGNORE_STATUS
272 ----------------------------------------------------------------------------
274 SimGrid (3.19.1) Released March 22 2018
276 The Fixed ABI Release.
278 As you may know, we are currently refactoring SimGrid in deep.
279 Upcoming SimGrid4 will be really different from SimGrid3: modular,
280 standard and extensible vs. layered, homegrown and rigid. C++ vs. C.
282 Our goal is to smooth this transition, with backward compatibility
283 and automatic update paths, while still progressing toward SimGrid4.
285 SimGrid remains open during works: The last pure SimGrid3 release was
286 v3.12 while all subsequent versions are usable alpha versions of
287 SimGrid4: Existing interfaces remain unchanged, but the new S4U
288 interface is budding and the internals are deeply reorganized.
290 Since 2015, we work hard to reduce the changes to public APIs. When
291 we need to rename a public library symbol in S4U, we let your
292 compiler issue an explicative warning when you use the deprecated
293 function. These messages remain for four releases, i.e. for one full
294 year, before turning into an error. Starting with v3.15, your can
295 also adapt to API changes with the SIMGRID_VERSION macro, that is
296 defined to 31500 for v3.15, to 31901 for v3.19.1 and so on.
298 Starting with this v3.19.1, our commitment to reduce the changes to
299 the public interfaces is extended from the API to the ABI: a program
300 using only MSG or SimDag and compiled against a given version of
301 simgrid can probably be used with a later version of SimGrid without
302 recompilation. We will do our best... but don't expect too much of
303 it, that's a really difficult goal during such profund refactoring.
305 The difference between v3.19 and v3.19.1 is that the former was
306 accidentally breaking the ABI of MSG, while the later is restoring
309 S4U and kernel APIs will still evolve until SimGrid4, with one-year
310 deprecation warnings as currently. In fact, cleaning up these
311 interfaces and converting them to snake_case() is one release goal of
312 v3.20. But don't worry, we are working to smooth this upgrade path.
314 In summary, new projects should start with S4U to benefit of the
315 future, but old MSG projects should still be usable with no change.
317 ----------------------------------------------------------------------------
319 SimGrid (3.19) Released March 20 2018
321 The Moscovitly-cold Spring release.
323 SMPI user-visible improvements:
324 - Support of MPI_Type_create_subarray
325 - Unimplemented MPI calls now abort (instead of issuing a warning)
326 Some harmless calls around errhandlers still only issue a warning.
327 - MPI_Sendrecv was behaving badly when MPI_PROC_NULL was sender or receiver.
328 - Starting MPI ranks (or even MSG/S4U actors) once the simulation started
329 is now possible (mmap privatization was refactored to this end).
330 Adding new SMPI instances should also be technically doable now.
332 SMPI internal cleanups:
333 - Removed index notion from SMPI -- no more "getPid() - 1"!
334 In tracing files, actors are called rank-<PROCESS-ID> but these are
335 NOT the real ranks (tracing several communicators is not supported yet).
336 - Deprecate smpi_process_index() (will be removed in 3.22)
337 - Better testing on classical proxy apps, through an external project:
338 https://github.com/simgrid/SMPI-proxy-apps/
341 - Use a graphical TOC to make it easier to find the documentation you need
342 - Revamp the MSG tutorial
345 - Fix MSG_task_get_remaining_work_ratio(): return 1.0 for unstarted tasks.
346 - Remove parameter of MSG_process_killall().
347 Resetting the PID was bogus anyway (several actors could have the same PID).
350 - Execution->setHost() can be called after start(), to migrate it.
351 - Comm::test_any() is now implemented.
352 - s4u::Actor now has onCreation() and onDestruction() signals.
353 - Install some kernel header files for the users' plugins and more.
354 Warning, their API is really not stable yet.
355 include/simgrid/kernel/resource/{Action,Resource,Model}.hpp
356 include/simgrid/kernel/routing/*Zone.hpp
359 - SD_task_dependency_add(): remove unused parameters 'name' and 'data'.
361 Build System and other cleanups:
362 - Remove unused run-time parameter "tracing/onelink-only".
363 - SimGrid now works with intel compilers (MC still buggy)
364 - Remove XBT_LOG_CONNECT, it should be useless nowadays.
365 - tesh kills subprocesses on timeout (but not on windows)
368 - Rename FULLDUPLEX into SPLITDUPLEX (old name still accepted)
371 - #194: Feature request: simgrid::s4u::Comm::test_any()
372 - #245: migrating an actor does not migrate its execution
373 - #253: Feature Request: expose clusters as objects
374 - #254: Something seems wrong with s4u::Actor::kill(aid_t)
375 - #255: Tesh broken on Windows
376 - #256: Modernize FindSimGrid.cmake
377 - #257: Fix (ab)use of CMake install
379 ----------------------------------------------------------------------------
381 SimGrid (3.18) Released December 24 2017
383 The "Ho Ho Ho! SimGrid 4 beta is coming to town" release.
385 MSG IS NOW DEPRECATED. Please use S4U for new projects.
386 - Support for MSG should not be removed from SimGrid before 2020,
387 but future evolutions will be limited to the integration of
388 user-provided patches.
391 - s4u::onDeadlock() signal, run before stopping the simulation.
392 - s4u::Exec: asynchronous executions (abstraction of background
394 - s4u::Host->getLoad() returns the achieved speed in flops/s
397 - Link::name() is deprecated and will be removed in v3.21, use
398 Link::getCname() instead.
399 - Mailbox::getName() changed to return a std::string, use
400 Mailbox::getCname() instead to get a char*.
401 - Storage::getName() changed to return a std::string, use
402 Storage::getCname() instead to get a char*.
403 - s4u::allStorages() becomes s4u::getStorageList(whereTo)
404 to have both allocation and deallocation of the map in user space.
407 - Forbid the use of MSG_task_get_flops_amount() on parallel tasks:
408 The amount of flops remaining to do is a vector, not a scalar.
409 - Introduce MSG_task_get_remaining_work_ratio(), which does what its
410 name implies on both sequential and parallel tasks.
411 - Both changes fix GitHub's #223 using PR #237 as a basis.
412 Thanks Michael Mercier.
413 - Most examples were converted to S4U and hidden elsewhere at tests.
414 Rationale: we still want MSG to work; we want newcomers to use S4U.
417 - LMM stuff moved to its own namespace: simgrid::kernel::lmm.
418 - Renamed LMM classes (e.g. s_lmm_system_t -> System).
421 - Switch to the faster dlopen privatization mechanism by default
422 - Documentation improvments
425 - Live migration is getting moved to a plugin. Dirty page tracking is
426 the first part of this plugin. This imply that VM migration is now
427 only possible if one this function is called:
428 - C/MSG: MSG_vm_live_migration_plugin_init()
429 - C/C++: sg_vm_live_migration_plugin_init()
430 - Java: Msg.liveMigrationInit()
431 For C and C++, "simgrid/plugins/live_migration.h" also has to be
435 - Define class simgrid::xbt::Path to manage file names.
436 - Removed unused functions:
437 - xbt/file.h: xbt_basename(), xbt_dirname(), xbt_getline()
438 - xbt/graph.h: xbt_graph_edge_get_length(), xbt_graph_edge_set_length,
439 xbt_graph_export_graphviz()
440 - xbt/str.h: xbt_str_join()
441 - Remove unused datatypes:
442 - xbt/heap.h: use std::priority_queue or boost::heap instead
443 - xbt/swag.h: use boost::intrusive::list instead
446 - New link_energy plugin for the consumption of the links.
447 - All of the operations on files and storage contents have been
448 packaged into a plugin (src/plugins/file_system). The current
449 public interface can be found in
450 include/simgrid/plugins/file_system.h
451 To use these functions you now have to initialize the plugin by
452 calling MSG_storage_file_system_init() just after calling
453 MSG_init() or sg_storage_file_system_init() just after creating
457 - Remove the undocumented/untested tag <include>
460 - Remove viva specific tracing as the tool is no longer maintained
463 - #248: Kill of finished processes leads to segfault
464 - #240: xbt_cond_wait_timeout should gracefully return for C apps
465 - #239: please implement signal s4u::onDeadlock()
466 - #230: segfaults when exit() without run()
467 - #225: s4u::Actor::kill() doesn not really kill victims in a join()
468 - #223: MSG_task_get_flops_amount() not working with parallel tasks
469 - #222: Actor::kill() doesn't really kill and segfaults
470 - #221: odd LMM warning when killing an actor
471 - #120: Memory leak when the processes are forcefully killed
473 ----------------------------------------------------------------------------
475 SimGrid (3.17) Released October 8 2017
477 The Drained Leaks release: (almost) no known leaks despite the tests.
479 Even very long simulations will preserve your memory: our testsuite
480 stresses SimGrid for over 45mn on fast machines for a coverage of
481 over 80%, and there is only one single known leak, of about 4kb.
485 - Comm.detach(): start and forget about asynchronous emission. A cleanup
486 handler may be given to free resources if the comm cannot be completed.
487 - this_actor::send(mailbox) is now mailbox->put()
488 - New: simgrid::s4u::Comm::wait_all()
489 - New: Host.execute() for remote executions.
492 - Unused option network/sender-gap is removed.
495 - Deprecate MSG_task_isend_with_matching(): This unused feature
496 really complicates our internals. Will be removed in v3.20.
499 - Improved context termination. It is now possible to free resources, even
500 when a process is forcibly killed.
501 - ContextBoost: add support for Boost versions above 1.61.
504 - Bring back run-time option --cfg=exception/cutpath to remove exception
506 - Removed unused functions:
507 - xbt/str.h: xbt_str_split_str(), xbt_str_subst(), xbt_str_ltrim(),
508 xbt_str_rtrim(), xbt_str_trim().
509 - xbt/xbt_os_thread.h: xbt_os_thread_cancel(), xbt_os_thread_detach().
512 - Removed header files obsolete since SimGrid 3.12:
513 msg/datatypes.h, msg/msg.h, simdag/datatypes.h, simdag/simdag.h.
515 - #3: SD_exit should be made optional
516 - #120: Memory leak when the processes are forcefully killed
517 - #159: Threading test regression in Actor refcounting
518 - #170: simgrid::s4u::Comm::wait_any() returns too many comms
519 - #185: simgrid::s4u::Engine::instance()->shutdown() segfaults
520 - #186: Actor::killAll() segfaults if some process is blocked on wait()
521 - #191: VM migration and pstate
522 - #192: Updating the energy consumptions of all hosts crashes with VMs
523 - #195: All actors have PID=0 in the logs
524 - #204: Sometimes segfault with thread contexts and mmap privatization
525 - #222: Actor::kill() doesn't really kill and segfaults
526 - #225: Actor::kill() doesn't really kill when victims are doing a join()
528 ----------------------------------------------------------------------------
530 SimGrid (3.16) Released June 22. 2017.
532 The Blooming Spring Release: developments are budding.
535 - FreeBSD: Disable SMPI mmap privatization, switch automatically to dlopen.
536 - Mac, BSD: dlopen+thread broken, switch automatically to raw contexts.
537 - Java JAR file should be finally fully working on Mac OSX too.
539 XML platforms: Switch to platform v4.1 format.
540 * This is (mainly) a backward compatible change: v4 are valid v4.1 files
541 - <zone> can be used as a synonym for the now deprecated <as>
542 - <zoneRoute> can be used as a synonym for the now deprecated <asroute>
543 - <bypassZoneRoute> an be used as a synonym for the now deprecated <bypassAsRoute>
544 - <actor> can be used as a synonym for the now deprecated <process>
545 - state_file and avail_file periodicity is now easier to express
546 (check the documentation) the old behavior should still work.
547 * Storage: not backward compatible, but it seems that nobody ever used it
548 - Remove attribute 'content_type' of <storage_type>: was never used
549 - Make attribute 'model' of <storage_type> optional: for future usage
550 - Remove Bconnection model property: was never (in)validated. Replaced by
551 the maximum of the read and write bandwidth as a resource constraint.
554 - New and Backwards Compatibility break:
555 SD_simulate_with_update (double how_long, xbt_dynar_t changed_tasks_dynar)
556 When one wants to get the list of tasks whose states have changed during a
557 simulation round, s/he has to allocate and free a dynar and use it as
558 argument to this function. The former SD_simulate (double how_long)
562 - Allow multicore VMs, with the correct sharing (unless you overcommit)
563 BUG: vCPU overcommitting still leads to buggy sharing, though. WIP.
566 - New function to update the consumption of all hosts at once.
567 - Fix the model for multi-core hosts, linear in the amount of busy
568 cores with an abnormality for pIdle (see paper).
569 BUG: Still not satisfactory for ptask on mono-cores.
572 - The netzone are now available from the MSG API.
573 The old names still work, but are now deprecated.
576 - New algorithm to privatize globals: dlopen, with dynamic loading tricks
577 - New option: smpi/keep-temps to not cleanup temp files
578 - New option: smpi/shared-malloc-blocksize . Relevant only when global shared
579 mallocs mode is used, allows to change the size of the fake file used
580 (default 1MB), to potentially limit the number of mappings for large runs.
581 - Support for sparse privatized malloc with SMPI_PARTIAL_SHARED_MALLOC()
582 - Fortran ifort and flang compilers support
583 - New RMA calls supported (experimental):
584 - MPI_Win_allocate, MPI_Win_create_dynamic, MPI_Win_attach
585 - MPI_Win_detach, MPI_Win_set_info, MPI_Win_get_info
586 - MPI_Win_lock_all, MPI_Win_unlock_all, MPI_Win_flush
587 - MPI_Win_flush_local, MPI_Win_flush_all, MPI_Win_flush_local_all
588 - MPI_Op_commutative, MPI_Fetch_and_Op, MPI_Compare_and_swap
589 - MPI_Rput, MPI_Rget, MPI_Raccumulate, MPI_Rget_accumulate
592 - New: this_actor::isMaestro() returns whether we are in kernel mode.
593 - Behind the scene, ActivityImpl are now automatically refcounted.
594 Removing this nasty bottleneck will greatly simplify our internals.
597 - Replay: New function xbt_replay_action_get():
598 Retrieve the function previously associated to an event type.
599 - DROPPED FUNCTION: xbt_str_varsubst()
600 - DROPPED MODULE: strbuff. We don't need it anymore.
601 - DROPPED MODULE: matrix. We don't need it anymore.
602 - DROPPED MODULE: lib. We don't need it anymore.
604 -- Thu Jun 22 22:48:12 CEST 2017 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
606 SimGrid (3.15) Released March 22. 2017
608 The Spring Release: continuous integration servers become green
609 We fixed even the transient bugs on all target architectures:
610 Linux (CentOS, Debian, Ubuntu, Fedora), Mac OSX (Mavericks, El Capitan)
611 Windows, FreeBSD, NetBSD.
613 - Rename NetCards to NetPoints.
614 This was intended to help NS3 users, but that's not a netcard.
615 That's a point in the routing algorithm, let's avoid wrong simplifications.
618 - New: MSG_process_yield(). Stop and yield to other processes.
619 - New: MSG_process_daemon(). Daemon processes are automatically killed
620 when the last non-daemon process terminates
621 - New: MSG_process_ref/unref(). Fiddle with the process refcounting.
622 - Renamed MSG_energy_plugin_init() -> MSG_host_energy_plugin_init()
623 to make room for the upcoming network energy plugin.
624 - Drop MSG_host_get_current_power_peak: duplicates MSG_host_get_speed
627 - Ensure that an actor can kill itself with Process::exit()
628 - Kill the obscure NativeException. Nobody want to survive the issues
629 it denotes, so use JniException that is a RuntimeException (not to
630 be caught explicitly).
631 - Partial bug fix in initialization. SimGrid flags on command line were
632 consumed at C level but stayed in the original Java String[] args.
633 This could mess users' args[i] if SG flags were not put at the end of
635 The SimGrid flags are now removed from the Java arguments. However,
636 the number of arguments REMAINS UNCHANGED. It is then UNSAFE to test
637 if args.length is greater than the number of YOUR OWN ARGUMENTS.
638 It might be if you have --log or --cfg flags in the command line.
639 - Fix numerous memleaks all around the place. In particular, around VMs.
643 - s4u::onPlatformCreated: right before the simulation starts
644 - s4u::onSimulationEnd: right after the main simulation loop
645 - s4u::onTimeAdvance: right after a clock change (time is discrete)
646 - s4u::Host::onSpeedChange: when the pstate is changed, or when an
647 event from the availability_file changes the avail speed.
648 - Links are now usable from s4u
649 - New: Engine::hostList() and Engine::hostCount(). Still clumsy.
650 - New: Actor::suspend(), Actor::resume(), and Actor::migrate(new_host)
651 - New examples: The conversion of MSG examples to S4U has begun
652 - Actors: create, kill, migration, and suspend
653 - Applications: master-worker and token-ring
654 - Action replay: communications and storage
655 - Drop Host::getPstateSpeedCurrent() which duplicates Host::speed()
658 - Backwards Compatibility breaks
659 - The SD_route_get_list and SD_route_get_size functions have been removed.
660 They are replaced by the unique
661 void sg_host_route(sg_host_t src, sg_host_t dst, xbt_dynar_t links)
662 The route from src to dst is built in the links dynar whose size can
663 be obtained with xbt_dynar_length.
664 - The SD_route_bandwidth and SD_route_latency functions have been replaced by
665 sg_host_route_bandwidth and sg_host_route_latency.
666 Macros ensure the backwards compatibility, but you should fix your code
669 - Major C++ rewrite ongoing (SMPI used to be C compiled in C++).
670 This can break codes using SMPI internals (from private.h instead of the public smpi.h).
671 - Bump our claim of support from MPI 1.1 to MPI 2.2.
672 We don't support 100% of it, but it should be enough. Contact us if not.
673 - MPI_Win_lock/unlock, MPI_Get_accumulate support added (as for all RMA, implementation is
674 naive and probably inaccurate)
675 - New algorithm for SMPI_SHARED_MALLOC: global, where all blocks are
676 mapped onto a unique small file using some system magic.
677 - Bugfix: smpirun was sometimes misusing hostfile when wrongly terminated
678 - Fortran: cleanups, fixes, support of user-added operations
679 - RMA: MPI_Accumulate are applied in correct order.
680 - RMA: MPI_Win_{complete/post} shouldn't miss messages anymore.
681 - Better support for MPI_IN_PLACE
682 - Support for MPI_Win attrs and keyvals.
683 - Support MPI_Comm_group_create, MPI_Type_size_x
684 - MPI ops should be properly applied to all allowed types
685 - Replace implementation of MPI_Bcast "scatter followed by rdb allgather"
686 algorithm by a non failing one from mpich.
689 - Kill the fifo data container: we don't use it anymore.
692 - A <cluster> can now be created with different speed values to represent pstates.
693 see examples/platforms/energy_cluster.xml for an example.
695 SimGrid (3.14.159) Released December 28. 2016
697 The previous release was only a crude approximation of a Pi release;
698 this one should be a bit better.
700 - Revert a last minute change that broke on Mac OSX.
701 - Fix the changelog and NEWS files.
702 - Improve the documentation, in particular of the routing module.
703 - Integrate some patches flying around in Debian.
705 SimGrid (3.14) Released December 24. 2016
708 * The whole documentation was reworked and reorganized. There is
709 still much room for improvement here, but we're on it.
712 * We now need python3 for our testing infrastructure.
713 * Model checking needs libevent
716 * Now works on FreeBSD
719 * Privatization now works on FreeBSD
721 * Privatization is now activated by default in smpirun
722 You can turn it off with -no-privatize if something goes wrong.
724 * Call-location tracing for SMPI.
725 You can add the exact location (filename / linenumber) of an MPI call to
726 your trace files and slow down or speed up the simulation between two
727 consecutive calls by using an adjustment file (see the documentation).
729 * Fixed computation of timings for MPI_Send, MPI_Recv & possibly also others
730 We've found a bug that prevented SMPI to account for MPI_Send, MPI_Recv
731 and others (in some cases) in a correct way. That is, the smpi/os, smpi/or
732 values were ignored in some cases. The timings of these functions can now
733 be significantly different.
735 * smpi/cpu-threshold:-1 should become smpi/simulate-computation:no
736 smpi/running-power is renamed to smpi/host-speed
738 * smpi/grow-injected-times option to enable or disable multiplication of the
739 timings injected in MPI_Iprobe, or MPI_Test. Enabled by default, which can
740 make simulation less precise (but also much faster).
742 * smpirun script should be (much) faster for large deployments.
744 * SMPI tracing: fixed issue with poor matching of send/receives.
746 * Replay: Fix broken waitall
748 New functions and features
749 * MSG_parallel_task_execute_with_timeout, to timeout computations.
751 Dropped / renamed functions and features
752 * msg_mailbox_t and associated functions. Use s4u::Mailbox instead.
753 - MSG_mailbox_is_empty() -> Mailbox::empty()
754 - MSG_mailbox_front() -> Mailbox::front()
755 - MSG_mailbox_get_by_alias() -> simgrid::s4u::Mailbox::byName(name)
756 - MSG_mailbox_get_task_ext() -> MSG_task_receive_ext()
757 - MSG_mailbox_get_task_ext_bounded -> MSG_task_receive_ext_bounded
758 - MSG_host_(get/set)_params -> MSG_vm_(get/set)_params
759 * Don't pass the free_f parameter to property related functions:
760 - MSG_host_set_property_value()
761 - MSG_as_router_set_property_value()
762 - MSG_storage_set_property_value()
763 * VM properties. Since msg_vm_t are msg_host_t, just use
764 MSG_host_get_property_value() and friends
765 * VM I/O related things:
766 - Ignored parameter of vm_create: core_nb, disk_path and disk_size.
767 - Unimplemented save/restore methods
768 * MSG_as_router_get_property_value() was redundant with
769 MSG_environment_as_get_property_value().
770 - Removed MSG_as_router_*propert*() functions
771 - Added MSG_environment_as_set_property_value() for consistency
772 * xbt heterogeneous dictionnaries (created with xbt_dict_new()).
773 Well, they are still there for now, but deprecated with a warning.
774 Please switch to xbt_dict_new_homogeneous() before this is removed
776 * Task affinity. Its intended behavior (that was very badly tested
777 and probably not really working) was deceiving what most users
778 would have hoped here.
779 * xbt_os_sem_get_value: unused internally, deprecated on OS X El Capitan
780 * Option network/coordinates is now useless and should be dropped.
783 * Added option storage/max_file_descriptors to allow more than 1024 files opened
786 * Added option maxmin/concurrency_limit to allow more than 100 processes per host
787 * Added Dragonfly topology support
790 * Add Exa- and Peta- units such as EiB, EB, Eib, Eb for size, and
791 EiBps, EBps, Eibps, Ebps for bandwidth.
792 They may become useful to some lucky ones.
795 * New functions: msg.Comm.waitAll() and msg.Comm.waitAny()
796 * ex/app_tokenring: new example, very similar to the MSG Token Ring
797 * ex/async_waitAll: new example, on asynchronous communications
800 * Memory usage should be decreased for simulations with a large number
801 of processes. This also helps for SMPI.
803 SimGrid (3.13) stable; urgency=low
805 The Half Release, a.k.a. the Zealous Easter Trim.
807 - We removed half of the lines, that were mostly experimental cruft.
808 v3.12 lasted 286000 lines of code, v3.13 is only 142000 lines
809 (not counting blanks and comments -- according to openhub.net)
810 - The internals are now compiled in C++ (and will soon be clean C++)
811 - We removed 75 klines of XML, 12 klines of Java, 5 klines of cmake,
812 59 klines of C, etc. We added only 29 klines of C++ in replacement.
814 * Backwards Compatibility breaks
815 - Removed Lua simulation bindings (switch to C or Java for that).
816 Lua can still be used to describe platforms
817 - Removed Java kernel plug-ins.
818 Will be reintroduced after the ongoing major internals reorg.
820 - the following functions were removed.
821 They were too specific and should be reimplemented in a generic
822 way, with filter function.
823 - MSG_task_listen_from_host
824 - MSG_mailbox_get_count_host_waiting_tasks
825 - MSG_mailbox_put_with_timeout was removed.
826 Please use MSG_task_send_with_timeout instead.
828 - the SD_application_reinit function was removed. It has been a noop for a while.
829 - The ACCESS_MODE of SD_workstation has been removed. This feature was not really usable and should soon be
830 replaced by a more flexible mechanism.
831 - The following functions thus do not exist anymore
832 - SD_workstation_get_access_mode
833 - SD_workstation_set_access_mode
834 - SD_workstation_get_current_task
835 - Basic estimation functions have been removed but can easily be replaced
836 - SD_route_get_communication_time => SG_route_get_latency() + amount / SD_route_get_bandwidth()
837 - SD_workstation_get_computation_time => amount / sg_host_speed()
839 - VM.setBound(int load) is now VM.setBound(double bound) to meet the MSG semantics.
840 Use VM.getSpeed()*load/100 for the legacy behavior.
842 - option enable_tracing was removed. It was not doing anything for a while.
843 - In the ModelChecker:
844 - the model-checker now ptraces the model-checked process which means
845 you cannot use a debugger on the latter anymore (we might make this
846 optional in the feature);
847 - removed soft-dirty page tracking;
848 - remove model-checked side snapshot management,
849 MC_snapshot() and MC_compare_snapshot();
850 - keep the MC_cut() function as a stub (it was not really working
851 in the previous release).
854 * All options are consistently in kebab-case. Old names are kept as alias.
857 * Switch to platform v4 format.
858 - Rename from 'power' to 'speed' the attributes describing the amount of
859 flops that a <host>, <peer>, <cluster> or <cabinet> can deliver per second.
860 - In <trace_connect>, attribute kind="POWER" is now kind="SPEED".
861 - In <host> and <link>, attributes availability and state are gone.
862 It was redundant with state and availability traces, and with peak values.
863 - In <cluster>, attributes availability_file and state_file are gone.
864 It was too complex and unused.
865 - Kill <gpu>. Was not doing anything.
866 - The DOCTYPE points to the right URL:
867 http://simgrid.gforge.inria.fr/simgrid/simgrid.dtd
868 (the file at this address now documents the changelog since its v1)
869 - A warning is emitted for unit-less values (they are still accepted).
870 - speed. Default: 'f' or 'flops'. Also defined:
871 'Yf', 'Zf', 'Ef', 'Pf', 'Tf', 'Gf', 'Mf', 'kf'
872 'yottaflops', 'zettaflops', 'exaflops', 'petaflops', 'teraflops', 'gigaflops', 'megaflops', 'kiloflops'
873 - bandwidth. Default: 'Bps' bytes per second (or 'bps' for bits but 1 Bps = 8 bps)
874 Also defined in bytes: 'TiBps', 'GiBps', 'MiBps', 'KiBps', 'TBps', 'GBps', 'MBps', 'kBps', 'Bps'
875 And the same in bits: 'Tibps', 'Gibps', 'Mibps', 'Kibps', 'Tbps', 'Gbps', 'Mbps', 'kbps', 'bps'
876 - latency. Default: 's' second. Also defined:
877 'w' week, 'd' day, 'h' hour, 'm' minute, 'ms' millisecond, 'us' microsecond, 'ns' nanosecond, 'ps' picosecond
879 * bin/simgrid_update_xml can upgrade your files automatically (won't convert unit-less values)
880 tools/sg_xml_unit_converter.py may help (but it's just a warning and will probably ever be).
883 * s4u::Host is now the preferred public interface to the Host features.
884 sg_host_* functions are C bindings to the exact same behavior
885 MSG_host_* and SD_workstation_* are #define to the sg_host_* ones
888 * The examples were completely reorganized (in C and Java), for your browsing pleasure.
889 * Kill all deprecated functions (the ones you had when declaring MSG_DEPRECATED).
890 They were deprecated since a few years, and probably did not even compile anymore.
893 * The API has been profoundly modified to directly use the core objects instead of redefining its own.
894 SD_Workstation_t and SD_link_t are now sg_host_t and sg_link_t respectively.
895 Some functions have also been renamed for consistency. Backward compatibility is maintained, but users are
896 encouraged to update their codes. A list of the modified functions can be found at the end of
897 include/simgrid/simdag.h
900 * simgrid::simix::kernelImmediate() is the closure callback. It ensures that
901 the lambda or closure passed as a parameter will run in kernel mode.
902 All the callback functions should be rewritten to that interface at some point.
905 * Reorganizing and cleaning the internals all around the place.
908 * Remove old default barrier/bcast buggy algorithms (see #18407)
909 * Various bug fixes to handle more codes
910 * Remove the need for the --foreground option of smpirun (it is still
911 accepted for backward compatibility).
914 * Kill the setset data container: MC don't use it anymore.
915 * Kill the queue data container: it made more sense with GRAS.
916 * Kill the xbt_peer_t data type: it's useless without GRAS.
917 * Kill rm_cb feature of config sets: it was never useful.
918 * Kill graphxml parsing feature. It was not used.
919 * Kill the deprecated code protected by XBT_USE_DEPRECATED
921 - xbt_dynar_sort_strings(), when the content is char*
922 - xbt_str_parse_int / xbt_str_parse_double, wrapping strtol/strtod
923 They throw exceptions on invalid input;
924 * C++ support for declaring CLI flags (simgrid::config::Flag);
925 * class for abstracting different signal backends (simgrid::xbt::signal).
926 with no external dependencies (we need very simple signals).
929 * refactoring and cleanup of the code;
930 * ongoing process to cleanly separate the model-checking algorithms
931 from the code model-checking support.
933 -- Wed Apr 27 21:00:53 CEST 2016 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
935 SimGrid (3.12) stable; urgency=low
937 The Facelift Release.
940 * Require g++ v4.7 at least to not speak prehistorical C++.
941 * Require Boost 1.48 (for signal2 component).
942 * Java must be version 7 at least when activated.
943 * Builds on Windows again (including Java bindings).
944 * Tracing is now always enabled (no way to turn it out)
945 * Remove GTNetS. It was not working anyway.
946 * Various cleanups in the cmake scripts.
947 * Move headers around to sort them out on installed systems:
948 - instr/instr.h -> simgrid/instr.h
949 - instr/jedule/* -> simgrid/jedule
950 - simdag/datatypes.h was removed
951 - simdag/simdag.h -> simgrid/simdag.h
952 - msg/datatypes.h was removed
953 - msg/msg.h -> simgrid/msg.h
956 * Interface improvement:
957 - Rename MSG_host_is_avail(h) to MSG_host_is_on(h)
958 - Sanitize the interface in MSG_task_ module:
959 - Merge two functions that were close enough but misleading:
960 set_compute_duration(t) -> set_flops_amount(t)
961 get_remaining_computation(t) -> get_flops_amount(t)
962 - set_data_size(t) -> set_bytes_amount(t)
963 get_data_size(t) -> get_bytes_amount(t)
964 - Massive cleanups in the functions related to the energy
965 - MSG_host_get_pstate_number() -> MSG_host_get_nb_pstates()
966 - New: MSG_host_get_pstate()
968 - msg/energy/onoff: switching hosts on and off
970 * Interface improvement:
971 - Rename Host.isAvail() to Host.isOn()
972 - Rename Process.currentProcess() to Process.getCurrentProcess()
973 - Rename Task.setDataSize() to Task.setBytesAmount()
974 - Merge Task.getRemainingDuration() and Task.getComputeDuration() into Task.getFlopsAmount()
976 - #18874: Actually allows the GC to reclaim tasks
980 - SIMIX_process_throw: raises an exception in a remote process
981 * Refactoring: Separate sub-modules
982 - libsmx: the public interface, as libc in a real system
983 - popping: the strange dance that converts a user request into a kernel handling
984 - smx_context_*: the virtualization mechanisms that embed the user code
985 - smx_*: the handling of each simcalls
987 - simcall_host_set_power_peak_at -> simcall_host_set_pstate
988 * Rename smx_action_t into smx_synchro_t, making explicit that these
989 things are used to synchronize processes with their environment.
990 For example, a communication is a sort of synchronization involving
991 the communicating processes (that may block until the exchange) and
992 the platform. The same can be said from computations, etc.
994 - #18888: segfault when a process ends before its kill_time
998 - Onesided early support for: MPI_Win_(create, free, fence, get_name, set_name, get_group), MPI_Get, MPI_Put, MPI_Accumulate, MPI_Alloc_mem, MPI_Free_mem.
999 - MPI_Keyval*, MPI_Attr* functions, as well as MPI_Comm_attr*, MPI_Type_attr* variants (C only, no Fortran support yet)
1000 - MPI_Type_set_name, MPI_Type_get_name
1001 - MPI_*_c2f and MPI_*_f2c functions
1002 - MPI_Info_* functions (beware, get_nthkey may not follow the insertion order)
1003 - MPI_Pack, MPI_Unpack and MPI_Pack_size functions
1004 - Activate a lot of new tests from the mpich 3 testsuite
1006 - Constant times can be injected inside MPI_Wtime and MPI_Test through options smpi/wtime and smpi/test
1007 - InfiniBand network model added: Based on the works of Jerome Vienne
1008 http://mescal.imag.fr/membres/jean-marc.vincent/index.html/PhD/Vienne.pdf
1009 - When smpi/display_timing is set, also display global simulation time and application times
1010 - Have smpirun, smpicc and friends display the simgrid git hash version on --git-version
1011 * Collective communications
1012 - SMP-aware algorithms are now dynamically handled. An internal communicator is created for each node, and an external one to handle communications between "leaders" of each node
1013 - MVAPICH2 (1.9) collective algorithms selector: normal and SMP algorithms are handled, and selection logic is based on the one used on TACC's Stampede cluster (https://www.tacc.utexas.edu/stampede/).
1014 - Support for Rabenseifner Reduce/Allreduce algorithms (https://fs.hlrs.de/projects/par/mpi//myreduce.html)
1016 - Replay now uses algorithms from wanted collective selector
1017 - Replay can be used with SMP-aware algorithms
1018 - Memory occupation of replay should now be contained (temporary buffers allocated in collective algorithms should be shared between processes)
1019 - Replay can now replay several traces at the same time (check examples/smpi/replay_multiple example), to simulate interactions between several applications on a given platform. User can specify the start time of each instance. This should also allow replay + actual applications to run.
1021 - [#17799]: have mpi_group_range_incl and mpi_group_range_excl better test some corner cases
1022 - Correctly use loopback on fat-tree clusters
1023 - Asynchronous small messages shouldn't trigger deadlocks anymore
1024 * Energy/DVFS cleanup and improvement
1025 - smpi_set_host_power_peak_at() -> smpi_set_host_pstate()
1026 - new: smpi_get_host_pstate()
1029 - "Full" network optimization flag was broken since Surf++
1030 - Better handling of precision flags in maxmin
1031 - Fix bug causing sometimes "Impossible" errors
1032 - Properly pass cluster properties to included hosts
1033 * Improvement of the Energy plugin.
1034 - Always update the consumption before returning that value
1035 - New property: watt_off to denote the dissipation when the host is off
1036 - New functions getWattMinAt and getWattMaxAt to retrieve the
1037 dissipation of pstates that we are not currently at.
1038 * Java: class NetworkLink renamed to Link
1039 * New function: simcall_process_get_kill_time()
1040 * Massive rename s/workstation/host/
1041 - That's intrusive, but that's good for the project consistency. Sorry.
1042 - Change config option "workstation/model" into "host/model"
1045 - Add a xbt_heap_update function, to avoid costly xbt_heap_remove+xbt_heap_insert use
1046 - Add a xbt wrapper for simcall_mutex_trylock (asked in [#17878])
1047 - Add two new log appenders: rollfile and splitfile. Patch by Fabien Chaix.
1048 - xbt_dirname and xbt_basename for non-POSIX systems
1050 * The model checker now runs as a separate process.
1051 * The model checker runs must now be launched with the new simgrid-mc program.
1052 * Record/Replay: the MC can display a textual representation of a path in the
1053 execution graph. It can then be replayed outside of the model checker.
1055 -- Mon Oct 12 06:02:41 CEST 2015 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1057 SimGrid (3.11) stable; urgency=low
1062 * Normalizing pointers addresses tool for better diff between logs
1065 * Add cloud examples using new VMs
1066 - examples/msg/cloud/two_tasks_vm.tesh
1067 - examples/msg/cloud/simple_vm.tesh
1068 - examples/java/cloud/cloud.tesh
1069 - examples/java/cloud/migration/migration.tesh
1070 * Add java surf examples:
1071 - examples/java/surfPlugin/surf_plugin.tesh
1072 - examples/java/reservationSurfPlugin/reservation_surf_plugin.tes
1073 - examples/java/surfCpuModel/surf_cpu_model.tesh
1074 * Add SMPI+MSG example:
1075 - examples/smpi/smpi_msg_masterslave/
1080 - msg task destroy cancel test
1081 - msg_host on/off test
1082 * Move all tests in testsuite to teshsuite (adding tesh files)
1083 * Restructure teshsuites
1084 - one folder for each kind of test
1085 * Restructure AddTests.cmake
1087 - structure the order of tests (with sections)
1090 * Add virtual machine
1091 - creation of a VM on a PM
1092 - migration of a VM from a PM to another PM
1094 - MSG_process_join(msg_process_t process, double timeout)
1095 - msg_bar_t MSG_barrier_init(unsigned int count)
1096 - int MSG_barrier_wait(msg_bar_t barrier)
1097 - void MSG_barrier_destroy(msg_bar_t barrier)
1098 - msg_as_t MSG_environment_as_get_by_name(const char * name)
1099 * New option "msg/debug_multiple_use" to help debugging when a task is used
1102 - Improvements and finalization of MSG_storage, MSG_file APIs and their
1104 - Increase code coverage in test suites
1108 * Protect context stacks against stack overflow. The number of protected memory
1109 pages allocated on the top of each stack (1 by default) can be configured
1110 with the new command line option --cfg=contexts/guard_size:<value>.
1111 * Simcalls are now generated by a python script that
1112 - generates files included by SimGrid
1113 - checks that all the functions exist, and proposes prototypes
1115 - remove sem_destroy, file_set_data, comm_destroy, vm_set_state,
1116 host_set_data, host_get_data
1118 - simcall_process_join(smx_process_t process, double timeout)
1119 * Fix bug where sleeping processing could not be suspended.
1122 * Translate surf models from C to C++
1123 - Generic classes for all models: Model, Resource, Action
1124 - A generic interface for each kind of model (CPU, Network, Storage
1125 Workstation, WorkstationVM)
1127 * Translate surf routings from C to C++
1128 * Add callbacks using sigc++ or boost::signals2
1129 - Add callback functions for resource creation/destruction
1130 - Add callback functions for action state change
1131 - Handle Energy as a plugin
1132 * Replace swag by boost::intrusive
1133 * Add new routing models for clusters. For documentation, see
1134 http://simgrid.gforge.inria.fr/simgrid/latest/doc/platform.html#pf_cluster
1135 - tori, with topology="TORUS" and topo_parameters="ndim1,ndim2,...,ndimn"
1136 parameters for cluster tag
1137 - Fat trees, with topology="FAT_TREE" and
1138 topo_parameters="h;m1,...,mh;w1,...,wh;p1,...,ph" parameters for cluster tag
1139 - see examples/platforms/torus_cluster.xml and
1140 examples/platforms/fat_tree_cluster.xml
1141 * More documentation
1144 * Hostfiles support host:nb_processes construct to deploy several processes on
1146 * Collective communication algorithms should not crash if used with
1147 improper number of nodes and report the error.
1148 * SMPI now partially supports MPI_Topologies: MPI_Cart_create, MPI_Cart_shift,
1149 MPI_Cart_rank, MPI_Cart_get, MPI_Cart_coords, MPI_Cartdim_get,
1150 MPI_Dims_create, MPI_Cart_sub are supported.
1151 * New interface to use SMPI programmatically (still depends on MSG for
1152 some parts, see examples/smpi/smpi_msg_masterslave):
1153 - SMPI_app_instance_register(const char *name, xbt_main_func_t code,
1157 * Global variables privatization in MPI executables is now performed at runtime
1158 with the option smpi/privatize_global_variables (default:no).
1159 Limitations: Linux/BSD only, with mmap enabled. Global variables inside
1160 dynamic libraries loaded by the application are not privatized (static
1161 linking with these libraries is advised in this case)
1164 * Options defined in XML work correctly now.
1167 * New cmake option, enable_lib_in_jar, to control whether native libraries are
1168 copied into simgrid.jar or not (ON by default). Use this option if you want
1169 to reduce the size of the installed simgrid.jar, *and* the native libraries
1170 are kept installed elsewhere.
1171 * Surf binding with SWIG (code generated in maintainer mode only):
1172 - plugin to handle callbacks
1173 - CPU model only for the moment
1176 * Supernovae build mode is definitively removed. It was used to improve
1177 inlining and inter-module optimizations. It is nowadays superseded by
1178 link-time optimizations commonly available in compilers.
1179 * Update ns-3 find lib. Bindings for ns-3 should work again now.
1180 * Add boost dependency for surf++
1181 * Add new macro for tests
1182 - ADD_TESH(name <tesh_args>)
1183 - ADD_TESH_FACTORIES(name "thread;ucontext;raw" <tesh_args>)
1187 - xbt_bar_t XBT_barrier_init(unsigned int count)
1188 - int XBT_barrier_wait(xbt_bar_t barrier)
1189 - void XBT_barrier_destroy(xbt_bar_t barrier)
1190 * Make the xbt_os_time module public
1192 -- Sat May 31 22:39:38 CEST 2014 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1194 SimGrid (3.10) stable; urgency=low
1196 The Clean Diaper Release, a.k.a. SimGrid is leak-free.
1199 * Reintegrate Java to the main archive as desynchronizing these
1200 package is not acceptable anymore (Java is now considered stable)
1201 * Add explicit synchronization facilities through semaphores
1202 * Bug fix: Task.setDataSize() only changed the C world, not the value
1203 cached in the Java world
1206 * Dramatically change the way files are handled. API and internals changed, but
1207 this part of MSG was not considered as production grade either.
1208 * Add explicit synchronization facilities through semaphores
1209 * Add a new function MSG_host_get_process_list()
1210 * Preliminary DVFS support (see examples/msg/energy/ for details)
1213 * SMPI is now included directly in the libsimgrid as the windows
1214 linker doesn't force us on splitting it anymore.
1215 * Improvements of the SMPI replay tool:
1216 - Most of the collective communications are now rooted in the same process as
1217 in the original application.
1218 - Traces now rely on the same MPI data type as the application (MPI_BYTE was
1219 used until now). Multiple data types can now be used in a trace.
1220 - The replay tool now supports traces produce either by TAU or a modified
1222 - Bug Fix: the compute part of the reduce action is now taken into account.
1223 - Gatherv collective is now supported
1224 - SimGrid (SMPI for now) can generate replay traces as well. Option -trace-ti
1225 of smpirun outputs time independent traces for the current run. One file
1226 is created per process. If too many processes are simulated, this behavior
1227 can be changed to one file for all processes by using the
1228 tracing/smpi/format/ti_one_file flag
1229 * smpirun generates the host file if needed (with given host count and platform)
1230 * Integration of more than 100 STAR-MPI, MPICH, OpenMPI collective algorithms
1231 - allows to select one in particular with --cfg=smpi/coll_name:algorithm
1232 - allows to use the decision logic of OpenMPI(1.7) or MPICH(3.0.4) by setting
1233 --cfg=smpi/coll_selector:(mpich/ompi)
1234 * Support for new functions: MPI_Issend, MPI_Ssend, Commutative operations in
1236 * Add a --cfg:tracing/smpi/internals option, to trace internal communications
1237 happening inside a collective SMPI call.
1238 * Fix the behavior of complex data types handling.
1239 * Make MPI_Wtime another synchronization point to take computations into
1241 * Replace MPICH-1 test suite by the one from MPICH 3.0.4. Can be built using
1242 enable_smpi_MPICH3_testsuite flag in cmake. Run with ctest.
1243 * Add all missing Fortran bindings, SMPI should work with Fortran 90
1244 (no privatization of global variables yet)
1245 * Preliminary DVFS support (see examples/smpi/energy/ for details)
1248 * Verification of liveness properties is now available for SMPI applications
1249 (in addition to MSG applications)
1250 * Bugged examples using SMPI in examples/smpi/mc/
1251 * Add --cfg=model-check/visited option. Allows the verification of infinite
1252 programs. Detection of loops in the execution thanks to the system state
1253 comparison and reduction of the state space to explore. Can be combined with
1254 DPOR for safety properties.
1257 * Allow to change SimGrid configuration (see --help) within the code
1258 thanks to SD_config() as it can be done in MSG.
1259 * Add a new function SD_task_set_amount() upon user request.
1262 * Handle units for values (10ms, 10kiloflops, 10Bps, 1GB, ...)
1263 * Remove rule based routing (no more PCRE dependency)
1264 * Add a limiter_link option to cluster tag, to specify a maximum reachable
1265 bandwidth in fullduplex mode when it is less than twice the nominal bandwidth.
1266 * Add a loopback_bw and loopback_lat options to cluster tag.
1267 * Fix the peer tag that could not be mixed with other AS within a Vivaldi
1268 routing. Now peers are encapsulated in an AS and have their own private
1269 router but this is transparent.
1272 * Our own implementation of getline is renamed xbt_getline, and gets
1273 used even if the OS provide a getline(). This should reduce the
1274 configuration complexity by using the same code on all platforms.
1275 * New type: xbt_cfg_elm_boolean.
1276 * Allow to use yes/no for boolean configuration options in the command line.
1277 * Allow to disable SimGrid cleanups at exit from command line option.
1278 There are situations where one may want a simulation to end with an exit.
1279 Unfortunately, calling exit may cause SimGrid to segfault, which is quite
1280 annoying when scripting around the simulator. Adding a
1281 --cfg=clean_atexit:no allows to circumvent this issue.
1284 * Lots of memory leaks were corrected in this release.
1285 There is no known memory leaks anymore, in all of our 600+ tests.
1286 * New command line option --version, to get SimGrid version information.
1287 Packagers may want to add extra words to SIMGRID_VERSION_EXTRA defined in
1289 * Supernovae builds are deprecated, and expected to be removed in the next
1292 -- Sun Nov 17 00:26:44 CET 2013 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1294 SimGrid (3.9) stable; urgency=low
1296 The Grasgory release: GRAS is really dead now.
1298 * Complete overhaul of the internal host structures scheme.
1301 * If you use GRAS, you should stay at SimGrid 3.5 (at most) since it
1302 was considered as experimental and badly maintained since then.
1303 * Keeping it was thus a trap to our potential users, that could take
1304 it instead of MSG or SMPI by mistake despite is pity state.
1305 * GRAS seems to have very few users (if any), and no one volunteered
1306 to maintain it further. It also induces a lot of XBT code (for
1307 portability sake), that must be maintained too.
1308 * For all these reasons, we killed GRAS. If someone wants to revive it
1309 in the future, don't cry, our git history still remembers of GRAS.
1312 * Major overhaul. Merge our documentation again as time proved that
1313 splitting it was really not helping our users.
1314 * Further improve the developer documentation to help newcomers
1315 hacking on SimGrid itself. The user documentation (and in
1316 particular, the beginner documentation) is still in a sorry state.
1319 * Now works on Windows too!
1320 * Much more extensive test suite, from MPICH
1323 * Add a new loader (SD_PTG_dotload) that creates a parallel task graph
1324 (i.e., a DAG whose nodes are parallel tasks) from a dot file. Creates a
1325 dynar of SD_TASK_COMP_PAR_AMDAHL and SD_TASK_COMM_MXN_1D_BLOCK tasks.
1326 * Bug fix: let task be scheduled when the last dependency to be solved is
1327 a control dependency.
1328 * Remove SD_load_environment_script function.
1329 Use the C sg_platf function if you want to declare a platform
1333 * New function: MSG_process_get_number()
1334 * Old function documented: MSG_config()
1335 * Remove MSG_load_platform_script function
1336 Use the C sg_platf function if you want to declare a platform
1340 * Change the default value of the TCP_gamma constant (maximal size of TCP
1341 congestion window) to a more realistic 4MiB value. If you notice changes in
1342 your simulation results, you can fall back to the previous 20k tiny window
1343 by adding --cfg=network/TCP_gamma:20000 on command line.
1344 * (Hopefully) fix a bug wrt periodic availability and state traces
1345 * Bug fix: use default values at start when first event in availability/state
1346 trace is not at time 0.
1349 * remove the "new_" part of function name sg_platf_new_trace_connect
1350 (resulting in sg_platf_trace_connect), since it does not create
1354 * Kill synchronized dynars, and xbt_dynar_dopar(). We cannot think of a
1355 use case where it's really mandatory, and maintaining it was a pain in
1357 * New: xbt_fifo_search(), search an item with a user-provided
1358 comparison function instead of dumb pointer comparison.
1361 * Fix the lua deployment:
1362 Use `simgrid.init_application()` before deployment instead of
1363 `simgrid.msg_register_application()` after.
1366 * Transfer the tracing files into the corresponding modules.
1368 -- Tue Feb 5 11:31:43 CET 2013 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1370 SimGrid (3.8.1) stable; urgency=low
1372 The "we are told that some people want to also *install* the simgrid
1375 * Add missing file "tesh.1" to the archive.
1377 -- Sat Oct 27 16:12:11 CEST 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1379 SimGrid (3.8) stable; urgency=low
1381 The Psssshiiiit release: SimGrid jumps into the Cloud.
1384 * Add an experimental interface to manipulate VMs. They are mainly
1385 process groups with very few intrinsic semantic, but they should
1386 allow you to build the semantic you want easily.
1387 * New function: MSG_host_set_property_value()
1388 * New function: MSG_process_on_exit(). To clean memory in all cases.
1389 * Bug fixes that made the host (and link) failures unusable.
1390 * Add a way to auto-restart process when the host in which they are
1391 executing comes back (ON_FAILURE="RESTART" on deployment file,
1392 MSG_process_auto_restart_set).
1393 * Use the "msg_" prefix for all datatypes (instead of m_, msg_ and MSG_),
1394 please stop using the old ones, they are DEPRECATED.
1396 * Deprecate functions MSG_global_init() / MSG_global_init_args()
1397 Please use MSG_init() instead. (reducing the amount of entry
1398 points in the library helps us).
1399 * Make it impossible to link against the wrong version of the lib
1400 * Deprecate MSG_clean(). No need to call it anymore.
1401 * Function MSG_get_host_number() is not deprecated anymore.
1404 * Split the doc into a user guide and a reference guide.
1405 * Start a developper guide to help people hacking on SimGrid.
1408 * Enable tracing by default. This modules rocks you should use it.
1409 * Remove option custom_flags. Now use environment variables CFLAGS
1411 * Use default cmake things to detect lua instead of home grown ones.
1412 * New option "enable_mallocators" to disable mallocators, for debugging
1413 purpose ("on" by default).
1416 * Bug fixes around the resource failures: don't let the processes
1417 survive the host they are running onto.
1418 * Add an interface to auto-restart processes when the host in which they are
1419 executing comes back.
1420 * Ensures that SIMIX_clean is called automatically. It's not part of
1421 the public interface anymore (bindings should be updated).
1424 * Bug fix for when SD_Simulate is called with a positive value: be careful
1425 when comparing doubles. Sometimes they are different for non significant
1427 * New types of typed tasks. SD_TASK_COMP_PAR_AMDAHL represents a
1428 parallel task whose initial work is distributed among host according
1429 to the Amdahl's law. Such tasks are created with a parameter alpha
1430 that corresponds to the non-parallelizable part of the computation.
1431 SD_TASK_COMM_PAR_MXN_1D_BLOCK represents a complex data redistribution
1432 between two sets of workstations assuming a 1D block distribution (each
1433 workstation owns a similar share of data) on both sides.
1435 These tasks can be scheduled with SD_task_schedulel or SD_task_schedulev.
1436 Data redistribution will be automatically scheduled once parent and child
1437 are both scheduled. The filling of computation_amount and
1438 communication_amount structures is now done seamlessly thanks to the chosen
1440 * New function SD_workstation_dump to display various information
1441 * New function SD_task_set_rate to throttle the bandwidth allowed to be used
1442 by a SD_TASK_COMM_E2E typed task. This rate depends on both the nominal
1443 bandwidth on the route onto which the task is scheduled and the amount of
1445 To divide the nominal bandwidth by 2, the rate then has to be:
1446 rate = bandwidth/(2*amount)
1447 * Compute tasks that have failed can now be rescheduled and executed again
1448 (from their beginning)
1449 * Increasing source code coverage (src/simdag is now covered at 95.8%
1453 * Re-implement time-independent trace replay using SMPI (at the
1454 smpi_smp_* level) instead of MSG. This should replace
1455 examples/msg/actions/actions.c
1456 * Implement support of MPI Datatypes (vectors, hvectors, indexed,
1457 hindexed and structs)
1458 * Implement the exchange of non-contiguous data.
1459 [Khalid Hasanov & Jean-Noel Quintin] Thanks for the patch, guys.
1460 * Correct behavior of smpi/sender_gap and set its default value to 0
1461 * Add option to asynchronously send small messages to allow better
1462 simulation of pt2pt communications. --cfg=smpi/async_small_threshold:value
1463 specifies the size in bytes under which messages will be asynchronously sent.
1464 * Add support of MPI_Iprobe, MPI_Probe, MPI_Testall, MPI_Wtick functions
1465 * SMPI now handles more MPI specific values in input. Closes [#14389] and [#14388]
1468 * New C interface to define a platform: XML is now optional.
1469 For more info, please check include/simgrid/platf.h.
1470 * New interface to define random platforms from the C:
1471 For more info, please check include/simgrid/platf_generator.h and
1472 examples/msg/masterslave/masterslave_platfgen.c
1473 * Export a sg_cmdline dynar containing all the arguments we got from
1477 * Two new tracing options for adding comments to trace file so you
1478 can track your experiments (see --help-tracing for details).
1479 * New option to generate a impoverished trace file (--cfg=tracing/basic:1)
1480 * Adding the SimGrid version that generated the trace file as a comment.
1481 * Instrumenting other MSG functions (MSG_task_isend_with_matching and MSG_task_dsend)
1482 * Fix to avoid key clashes on Paje links
1483 * Other minor fixes related to the Paje specification
1486 * Functions xbt_dict_hash() and xbt_dict_hash_ext() are made public,
1487 and renamed to xbt_str_hash() and xbt_str_hash_ext().
1488 * New function: xbt_os_timer_resume() to restart a timer w/o resetting it.
1489 * Greatly improve the robustness of mmalloc to user errors (such as
1490 using an area after freeing it, or freeing it twice)
1492 -- Thu Oct 25 17:30:06 CEST 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1494 SimGrid-java (3.8.1) stable; urgency=low
1496 * New module: org.simgrid.trace.Trace (SimGrid trace bindings)
1497 Warning: all methods are visible, but only some of them are
1498 implemented so far. Check the source (src/jtrace.c)
1499 for further information.
1500 * New module: org.simgrid.msg.File (SimGrid File management functions)
1501 * New Module: org.simgrid.msg.VM (SimGrid interface to mimick IAAS clouds)
1502 * Change the meaning of Process.restart: now restart the process from
1503 the begining, like MSG_process_restart in C.
1504 * Add Process.setAutoRestart: handling of process restart when failed
1506 * Add Process.getProperty, Host.getProperty, Host.getProperty: allows
1507 you to retrieve the properties of the processes/hosts
1508 * Deprecate Msg.clean(): you can just forget about it now.
1509 * New function Process.getCount(), that only works when compiling
1510 with the not yet released version 3.9 of the C library.
1512 * New context factory based on Coroutines. It mandates a modified JVM
1513 but then, the simulations run about five times faster, and there is
1514 no limit to the amount of processes (beside of the available memory).
1516 -- 2012-12-04 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1518 SimGrid (3.7.1) stable; urgency=low
1521 * Restore the prototype of MSG_process_create_with_environment() to
1522 the pre-3.7 situation by removing the kill_time argument.
1523 * Add a MSG_process_set_kill_time() function instead.
1526 * Fix weird behaviors when dealing with parallel tasks.
1529 * Simgrid is now built as a dll.
1530 * Simgrid-java now works on Windows.
1531 * Simgrid-Java is now included into Windows package.
1534 * First pre-build package for MacOSX.
1537 * Fix compilation when using MSG_USE_DEPRECATED.
1538 * Fix some compilation issues on Macs and Windows.
1539 * Reduce the number of failing tests on exotic systems, like Debian/Hurd.
1540 * Environment variables CFLAGS and LDFLAGS are now honored by cmake.
1542 We discovered that the Lua console is broken, but we are missing the
1543 manpower to fix it right now. The problem existed in 3.7 too, so we
1544 are not blocking the release for that. Sorry if you depended on this
1545 feature, any help would be really welcome.
1547 -- Thu Jun 7 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1550 SimGrid-java (3.7.1) stable; urgency=low
1552 The "Java aint got to be bloated and slow" release
1555 * Various internal cleanups and performance improvement
1556 Simulations are expected to run up to twice faster or so
1557 * Make Process.kill(process) an instance method, not a static one
1558 * User processes are not java.lang.Thread subclasses.
1559 This breaks the compatibility (sorry), but previous API was
1560 brain-dead, making it impossible to have non-trivial
1561 initializations in the process constructor.
1562 * Require a full constructor per Process sub-class.
1563 Kinda breaks the compatibility (sorry), but this allows a much more
1564 efficient way to launch the processes at simulation startup.
1565 * Do not embeed our version of semaphores, java 1.5 can be considered
1566 as sufficiently prevalent for us to not dupplicate its features.
1570 * Add examples for almost every part of the API
1571 We spotted and fixed a lot of bugs in the process
1573 * New module: asynchronous communication API
1574 * New function: Process.sleep()
1575 It takes milliseconds as argument, just as java.lang.Thread.sleep()
1576 * New module: org.simgrid.msg.Mutex (SimGrid mutexes)
1577 * New module: org.simgrid.msg.RngStream (RngStreams random generators)
1579 -- 2012-06-12 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1581 SimGrid (3.7) stable; urgency=low
1583 The "spring cleanups (before the next Big Project kicks in)" release.
1586 * We can specify the SMPI latency/bandwidth factor with command line
1587 add --cfg=smpi/bw_factor:"threshold0:value0;...;thresholdN:valueN"
1588 or add --cfg=smpi/lat_factor:"threshold0:value0;...;thresholdN:valueN"
1589 You can also use the "config tag" from platform file by adding this line
1590 <prop id="smpi/bw_factor" value="threshold0:value0;...;thresholdN:valueN"></prop>
1591 (see "example/platforms/tag_config.xml" to use "config tag").
1592 Note that the command line supersedes the platform file configuration.
1593 * Change the correction factors used in LMM model, according to
1594 the latest experiments described in INRIA RR-7821.
1595 Accuracy should be improved this way.
1596 * Use the partial invalidation optimization by default for the
1597 network too. Should produce the exact same results, only faster.
1598 * Major cleanup in surf to merge models and split some optimization
1599 mechanisms from the core of the models. As a result you can now
1600 specify which model to use (e.g., --cfg=network/model:LV08
1601 --cfg=cpu/model:Cas01) and which optimization mode to use
1602 (e.g., --cfg=network/optim:lazy --cfg=cpu/optim:TI).
1603 Incompatible combinations should err at initialization. See
1604 --help-models for the list of all models and optimization modes.
1605 * The CLM03 workstation model was dropped for simplicity because it
1606 used the deprecated CM02 network model. Use default instead.
1607 * Rename the TCP_gamma configuration option to network/TCP_gamma
1608 * Rename the coordinates configuration option to
1609 network/coordinates, and document it
1610 * Use now crosstraffic keyword instead of the terribly misleading
1611 fullduplex keyword. It is activated by default now in the current
1612 default model, use --cfg=network/crosstraffic:0 to turn it off.
1613 * Ongoing refactoring the model parsing to make XML files optional
1614 See include/simgrid/platf.h for details (still to be completed)
1617 * Major overhaul of the documentation. Almost instructive now :/
1618 * Deprecate the use of m_channel_t mechanism like MSG_task_{get,put}
1619 functions and friends. This interface was considered as
1620 deprecated since over 2 years, it's time to inform our users that it is.
1621 Switch to MSG_task_{send,recv} instead, or compile SimGrid command line
1622 'cmake -Dcustom_flags="-DMSG_USE_DEPRECATED" .' if you really need to
1623 use these (crappy) functions in your code.
1624 These functions will be removed soon. Stop using them now.
1625 * Deprecate MSG_get_host_{table,number}
1626 Implement MSG_hosts_as_dynar() instead.
1627 * Implement MSG_processes_as_dynar() (Closes gforge #13642)
1628 * Remove the public field msg_host_t->name. Use MSG_host_get_name()
1631 * Stabilize the parallel execution mode of user contexts
1632 * Introduce configuration variables to control parallel execution:
1633 - contexts/synchro: Synchronization mode to use when running
1634 contexts in parallel (either futex, posix or busy_wait)
1635 - contexts/parallel_threshold: Minimal number of user contexts
1636 that must be part of a scheduling round to switch to parallel
1637 execution mode (raw contexts only)
1638 * Fix bugs that prevented to use suspend/resume along with
1639 synchronization structures.
1640 * Fix bugs in process termination that lead to invalid memory access
1641 in very specific conditions.
1644 * Introduce a parallel mode for the models (controlled by surf/nthreads
1645 configuration item). In our tests, running the models in parallel
1646 never lead to any speedups because they are so fast that the gain
1647 of computing each model in parallel does not amortizes the
1648 synchronization costs, even when ultra fast futexes are used.
1649 This is released anyway because YMMV.
1652 * Performance boost by using a swag internally to compute the set of
1653 tasks that are finished and should constitute the return value of
1657 * Enable it by default now that it is considered rather stable.
1660 * Documentation of the tracing functions.
1661 * Performance gains when tracing categorized/uncategorized resource
1662 utilization by avoiding calls to get route when updating resource
1663 variables. LMM constraints are being used instead.
1664 * API changed to set task categories. Use MSG_task_set_category instead
1665 of TRACE_msg_set_task_category, and SD_task_set_category instead
1666 of TRACE_sd_set_task_category. They only work if ENABLE_TRACING is ON.
1667 * Bugfix for graphicator, routes not correctly obtained, memory leaks
1668 * Examples for link user variables added (see at examples/msg/tracing/)
1669 * Deprecated function TRACE_msg_set_process_category completely removed
1670 * Trace header updated according to the latest Paje file format
1671 * Tracing network lazy updates, no longer obligate users to use full updates
1672 * --cfg=tracing/platform:1 also registers power/bandwidth variables
1673 * Experimental: let user code declare/set/push/pop application states for hosts
1674 * API changed to allow the manual creation of graph configuration files
1675 for Triva. See TRACE_get_node_types() and TRACE_get_edge_types().
1678 * Improve the API of Lua MSG bindings, using the Lua spirit.
1679 * Each simulated process now lives in its own Lua world (globals are
1680 automatically duplicated). It helps writing simulators. Will allow
1681 to run Splay programs within SimGrid in the future.
1682 * Add a Chord example in Lua, equivalent to the MSG one.
1685 * Start the implementation of a solution to express temporal
1686 properties, not only local assertions. This is still an
1687 experimental work in progress, stay clear from it to be safe.
1691 - Add new runtime parameters --help-logs and --help-log-categories
1692 to display information about supported logging parameters and
1694 - Old deprecated parameters --{gras,surf,msg,simix,xbt}-log=...
1695 don't exists anymore.
1696 * Mallocators: allow value NULL for the reset function.
1698 - New function xbt_dict_new_homogeneous(void(*)(void*)) to
1699 create homogeneous dictionaries, where all the elements share the
1700 same free function. Non homogeneous dictionaries will be
1701 deprecated in the next release.
1702 - Dicts of scalar elements (xbt_dicti_*) are deprecated.
1703 - Multi-level dictionaries are deprecated.
1705 - new function xbt_dynar_search_or_negative() that is useful when
1706 you have less than 2 million elements in your dynar and don't
1707 want of the extra complexity of catching exceptions when the
1708 element is not found.
1710 - Make xbt_os_thread module (for thread portability) public.
1711 Documentation is still to come, sorry.
1713 - Cleanups and simplifications to make it maintainable again.
1714 - Exotic features (such as memalign and valloc) were removed.
1715 - The metadata were extended and improved so that the
1716 model-checker becomes able to explore and inspect the heaps.
1717 - This may induce a performance drop when enable_model-checking is
1718 ON in cmake (even if it's not used in the simulation), but it is
1719 necessary at this point to get MC working.
1721 Turn model-checking OFF if simulation performance matters to you.
1722 Not enabling it at runtime is not enough, disable it in cmake.
1724 -- Tue May 15 11:30:19 UTC 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1727 SimGrid (3.6.2) stable; urgency=low
1729 The "Not coding new stuff allows to polish old things" release.
1732 * New bindings to the NS3 packet level simulator (experimental)
1733 * Use the raw (efficient) execution contexts instead of the sysv
1734 (portable) ones when possible.
1735 * libpcre is now mandatory in any cases since not using it led to
1736 severe performance loss and possibly other issues
1737 * Update the XML platforms:
1738 - G5K: include the latest machine in Nancy
1739 - GridPP and LCG: new platforms
1740 * Documentation was partially updated, at least (more to come)
1742 Bug fixes, cosmetics and small improvements
1743 * Free terminated processes before the end of the simulation to avoid
1744 exhausting the memory of users having very dynamic amount of
1746 * Bug fix and cosmetics about canceling non-running tasks
1747 * Bug fix about the dot loader's issues when using libcgraph
1750 * Create an installer for windows with nsis (amd64 and win32)
1751 - Add an hello world project to illustrate simgrid project creation.
1752 - Embed libpcre into the Simgrid installer to avoid
1753 its compilation burden
1754 * The raw execution contexts should work on Apple now
1755 * Port to Windows 64 bits
1756 - Sysv contexts now have an implementation for this arch
1757 - GRAS communication features now support this arch
1758 * Drop support for borland compiler on windows
1759 - this code was not maintained, and we kinda depend on gcc nowadays
1760 * Fix portability issues on kfreebsd/gnu: build error about semaphores
1761 * Fix portability issue on unstable ubuntu: linker became picky on
1764 -- Wed Oct 5 15:51:01 CEST 2011 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1766 SimGrid (3.6.1) stable; urgency=low
1768 The "Oops, we broke Macs too" release
1771 * Fixed contexts detection so that raw ones are used when possible
1772 * On Mac, do not use Posix Ucontexts with gcc v4.[1-5] since this
1773 leads to a strange error, with user code segfaulting sometimes when
1774 the generated code is not perfectly aligned (which is not
1775 controllable from the user side, depends on the amount of code)
1778 * New macro: CATCH_ANONYMOUS, which is like CATCH(e) but without argument.
1780 -- Mon Jun 27 13:59:03 CEST 2011 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1782 SimGrid-java (3.6) unstable; urgency=low
1785 * Split of every thing from simgrid v3.5 into a separate package.
1787 -- 2011-10-05 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1789 SimGrid (3.6) stable; urgency=medium
1791 The Summer Release, also known as the "OMG! They Killed Kenny!" version
1794 * Bindings now constitute their own package, separated from the main one.
1795 Rationale: reduce our maintenance nightmare by reducing the module coupling
1796 They will soon be released on their own on gforge.
1798 svn co svn://scm.gforge.inria.fr/svn/simgrid/contrib/trunk/simgrid-java
1799 svn co svn://scm.gforge.inria.fr/svn/simgrid/contrib/trunk/simgrid-ruby
1801 GRAS: It is not considered as stable anymore, but experimental. Sorry.
1802 * It's not quite deprecated for now because we have no replacement,
1803 but it may soon become the case.
1806 * New MPI functions supported: MPI_Comm_disconnect, MPI_Comm_get_name
1807 * Fortran: New user-level cache variable to store the rank of the running
1808 process. This improves performance by an order of magnitude.
1809 * C: New coccinelle script to automatically locate and modify global and
1810 local static variables.
1811 * Improved SMPI network model with a sender-side gap to account for multiple
1815 * New function MSG_comm_get_status(). MSG_comm_test() and MSG_comm_testany()
1816 only say if a communication is finished, no matter whether it succeeded or
1817 failed. You can call MSG_comm_get_status() to know the status of a finished
1819 * New function MSG_task_dsend() to send a task and detach it. When a
1820 communication is detached, you are never notified of its success or failure
1821 and the memory is released automatically once it is finished. This function
1822 is useful when you don't care about the end nor the success of a
1824 * Change the prototypes of action replay. Sorry for inconvenience,
1825 but this is really more efficient this way (and to adapt your code,
1826 you just have to fix the initialization, that shouldn't be too long)
1827 * Kill the braindead MSG_task_refcount_dec() function. I guess nobody
1828 ever managed to do anything useful with it.
1829 * New function MSG_comm_testany(). Similarly to MSG_comm_waitany(), it
1830 takes a dynar of communications. It returns immediately and gives the
1831 index of a finished communication (if any).
1832 * New example: a basic implementation of the Chord P2P algorithm.
1835 * New model for multi-core CPUs. You can now use the core attribute to
1836 precise the number of cores of a host. This is a basic model. Every
1837 process running on the host receives at most the power provided in
1838 the DTD (throughput<=power). Total throughput of process cannot exceed
1840 * New peer tag. This peer tag creates a tiny AS comprising a host and a
1841 router linked by an up-link and a down-link (possibly asymmetrical).
1842 This kind of pattern allows to easily build last-mile model style platforms.
1843 Aggregating such patterns in a rule-based AS is thus the technique of
1844 choice for modeling large peer-to-peer/volunteer computing/cloud platforms.
1845 * New model for Vivaldi routing. We transformed the Vivaldi network model
1846 into a Vivaldi routing model (based on the rule-based model). This allows to
1847 combine Vivaldi based latencies with last-mile platforms.
1850 * Added a check for NaN of IEEE754 infinite in the double entries of
1852 * Introduce a new context factory "raw", highly inspirated from the
1853 ucontext factory, but using manually crafted functions in assembly to
1854 do the work in an efficient manner.
1855 * Allow to change the used context factory at run time, not only at
1856 compilation time. Use --cfg=contexts/factory:raw for maximal speed.
1857 * Add an option --cfg=contexts/stacksize:N to set the stack size of the user
1858 contexts at runtime (only with raw contexts or ucontexts).
1859 * Completely rewrote this module to allow parallel execution of user
1860 processes. Use --cfg=contexts/nthreads:N to execute user processes
1861 with N parallel threads (the default is 1, meaning no parallelism).
1862 * Allow to decide dynamically between sequential and parallel modes.
1863 When nthreads > 1, you can use --cfg=contexts/threshold:P to run the user
1864 processes in parallel only when their number is greater than or equal to P
1866 * Added a check for NaN of IEEE754 infinite in the double entries of
1870 * New command line option: if you pass --cfg=verbose-exit:0, SimGrid
1871 won't output the state of processes when interrupted with Ctrl-C
1872 * Add a new function xbt_dynar_to_array that transforms a dynar into a
1873 NULL-terminated array. This may solve backward compatibility issues
1874 due to the change to return type of SD_simulate. See also:
1875 http://lists.gforge.inria.fr/pipermail/simgrid-user/2010-December/002206.html
1876 * Add new macros with variable number of arguments.
1877 - in xbt/log.h: XBT_DEBUG, XBT_VERB, XBT_INFO, etc.
1878 - in xbt/asserts.h: xbt_assert
1879 - in xbt/cunit.h: xbt_test_{add,fail,assert,log}
1880 - in xbt/ex.h: THROWF and RETHROWF.
1881 Define XBT_USE_DEPRECATED if you want to use the old numbered macros like
1883 * Change xbt_die() to accept a format string with arguments, just like printf.
1884 * New data structure: xbt_lib_t, like a dict but more general and with better
1888 * New configuration options
1889 Options triva/categorized and triva/uncategorized can be used to generate
1890 graph configuration files for Triva visualization tool.
1891 * Configuration option tracing/platform is renamed to tracing/categorized
1892 * XBT logging makes tracing error checks easier, new root log hierarchy: instr
1893 * New TRACE_user_link_variable interface:
1894 User provides the name of the link and the tracing variable to attach to it
1895 * the declaration of tracing categories must be done after the environment
1897 * simpler tracing interface, just one way to declare categories
1898 TRACE_category or TRACE_category_with_color, it is up to you
1899 * links in the trace file are again identified by their names
1900 * trace contains the full platform hierarchy exactly as declared using the ASes
1901 * Options tracing/msg/[task|process]:1 groups the process by hosts
1902 for both cases, tasks and processes must have names that are unique during the simulation
1903 these options generate traces that are suited to gantt-charts, such as the space-time view of Paje
1904 * The experimental option tracing/msg/volume is deprecated
1905 its functionality may be reincorporated if needed
1907 The tracing generates a trace file with unordered timestamped events,
1908 because of the way the core simulator (surf) works. A script available
1909 at the tools directory (fix-paje-trace.sh) can be used to put the events
1910 in order. We have changed the tracing so it can generate ordered timestamped
1911 events in the final trace, but depending on the simulator (and how much time
1912 is simulated) that can lead to a huge memory utilization. It is deactivated
1913 by default, but it can be activated using the --cfg=tracing/buffer:1 switch.
1915 Build Infrastructure
1916 * Define a SIMGRID_VERSION macro in simgrid_config.h.
1917 - We are trying hard to keep the API stable, but it may happen that
1918 some things change (we're a research project after all, not a
1919 nuclear plant operating system). If such things should happen, you
1920 could rely on that macro to adapt.
1921 - current value: 30600 for 3.06.00, aka 3.6
1922 * Define macro MAKE_SIMGRID_VERSION(major, minor, patch) to help building
1923 a number that can be compared with SIMGRID_VERSION.
1924 * Add a build option -Denable_debug (set to ON by default): when set to OFF,
1925 assertions and verbose/debug logging events are disabled at compile time.
1927 -- Tue Jun 21 08:57:43 CEST 2011 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1929 SimGrid (3.5) stable; urgency=medium
1932 * New feature to any SimGrid-based simulator: Model-Checking
1933 Check SIN#1 for more details.
1936 * New Model SMPI (three-interval linear regression for correction factors)
1937 See RR-7426, available at http://hal.inria.fr/inria-00527150
1938 * Ability to use FORTRAN MPI code (through f2c, automatically privatized)
1939 * New MPI functions supported: MPI_Get_count(), MPI_Comm_split()
1940 * New: RAM folding (see RR-7426 and examples/smpi/NAS/DT-folding)
1941 * New: execution sampling (see RR-7426 and examples/smpi/NAS/EP-sampling)
1942 * See also src/smpi/README
1947 - Tracing API changes: TRACE_start and TRACE_end should not be called
1948 by user-code. They are automatically called by simulators created
1949 with SimDAG, MSG and SMPI if the toolkit is compiled with
1950 tracing_enabled=ON. Categories declaration and utilization remain the
1951 same for MSG and SimDag.
1952 - A function was added to the tracing API to declare categories with
1954 - TRACE_category_with_color (char *category, char *color)
1955 where color must be in the following format
1956 "%f %f %f", red, green, blue
1957 and red, green, blue are float values in the interval [0, 1]
1958 - User can specify NULL as color parameter, or continue calling
1959 TRACE_category (cat)
1960 On that case, the tracing system will define random colors
1961 - The following command-line options are supported:
1962 --cfg=tracing/filename:msg.trace
1963 --cfg=tracing:1 (activate tracing, needed to use others)
1964 --cfg=tracing/platform:1 (categorized resource use)
1965 --cfg=tracing/uncategorized:1 (uncategorized resource use)
1966 --cfg=tracing/msg/task:1 (task creation)
1967 --cfg=tracing/msg/process:1 (process creation, migration)
1968 --cfg=tracing/msg/volume:1 (volume of MSG send/recv)
1969 --cfg=tracing/smpi:1 (SMPI interface tracing)
1970 --cfg=tracing/simdag:1 (allow SimDAG tasks receive categories)
1971 - examples of examples/msg/tracing updated
1973 - DAXLoader and DOTLoader functions can generate tasks with categories
1974 - A new function to attribute a category to SD tasks:
1975 TRACE_sd_set_task_category (SD_task_t task, char *category)
1976 * Tracing the MPI interface implemented by SMPI
1977 - Collective operations are traced with states
1978 - Point-to-Point operations are traced with states/links
1979 - Tracing activated by a parameter "-trace filename" passed
1980 to smpirun during execution (considering that simgrid
1981 is compiled with tracing enabled)
1982 - To run the simulation with gdb, the simulator
1983 accepts --cfg=tracing/smpi:1 to trace SMPI
1984 - tesh files to check if smpi tracing is ok
1985 - See examples/smpi/NAS/DT-trace
1986 * GTNetS tracing re-worked
1987 - adaptation to the tracing system of GTNets to cope
1988 with modifications regarding the fullduplex mode
1989 - new tesh files to check if gtnets tracing is ok
1992 * Asynchronous communications through the functions:
1993 MSG_task_isend/irecv and MSG_comm_test/wait/waitall
1994 * New function: MSG_load_platform_script()
1995 to make possible using a lua script instead of XML files to set up platforms
1996 * New function: MSG_set_function
1997 to associate functions to processes, used when bypassing the parser
1998 * New functions: MSG_task_set_name(), MSG_task_set_compute_duration()
2000 Platforms: Add some more examples in examples/platforms
2001 * Grid'5000: see www.grid5000.fr
2002 * *_30000_hosts.xml: various huge files [mainly scalability testing]
2005 * Change the XML format. This is a very important modification. SimGrid
2006 3.5 introduces a new hierarchical format based on the notion of
2007 Autonomous Systems. Compatibility with old format is ensured
2008 through the perl script provided in the install bin directory
2009 bin/simgrid_update_xml.
2010 It is now possible to build platforms with specific routing
2011 mechanism (Full/Dijkstra/DijkstraCache/Floyd) and to easily
2012 connect several platforms together. We will try to provide soon
2013 set of realistic platforms exploiting these properties (have a
2014 look at examples/platforms/ for the moment).
2015 * Take the opportunity of the XML format change to be a good XML citizen:
2016 rename link:ctn to link_ctn and similar changes (also dealt with by
2018 * Add a new routing scheme (rule-based) using regular expressions. It
2019 enables to have an extremely low memory footprint when the
2020 underlying routing is simple and can be compactly described. You
2021 need to have libpcre4-dev (perl regular expressions) installed if
2022 you want to use this routing scheme.
2023 * Revive the cluster TAG and allow to easily and efficiently (both in
2024 term of memory and speed) connect clusters together. Have a look
2025 at teshsuite/simdag/platforms/ to see how this can be done. With
2026 this tag, you can create clusters with thousands of tasks at no
2027 cost (have a look at examples/platforms/).
2028 Note: clusters are implemented as ASes, so there is no need for an
2029 enclosing AS tag if you have only one cluster in your platform.
2030 * Add new generic functions in the public interface that allows the user
2031 to call SURF 'create_resource' methods from your code (same
2032 functionality as the XML bypass mechanism but with a much lighter
2034 * Add a new model (enabled through command line --cfg=network/model:SMPI)
2035 that uses a piecewise linear approximation to produce better
2036 results when exchanging small messages.
2037 * Add a new parameter to handle correctly full duplex link and account
2038 for interferences between uplink and downlink communications
2039 (activate with --cfg=fullduplex:1).
2042 * Rename the SD_READY (all dependencies are satisfied and task is
2043 scheduled) state in SD_RUNNABLE and define a new SD_SCHEDULABLE (all
2044 dependencies are satisfied) state.
2045 This prevents a confusion between the notion of "ready to schedule"
2046 (SD_SCHEDULABLE) used in DAG scheduling and that of "ready to be
2047 simulated" (SD_RUNNABLE) used by the simulation kernel.
2048 * Change the way a task is considered as ready. Instead of removing
2049 dependencies when a task is done, a counter is decreased. This way,
2050 it is always possible to reach ancestors thanks to the
2051 SD_taks_get_parents function (even after the end of the simulation.)
2052 * Change the return type of SD_Simulate from (SD_task_t*) into
2053 xbt_dynar_t. This function was in handling a dynar internally and
2054 converted it into a NULL terminated array for historical reasons.
2055 * New function SD_dotload(char*) to load a DAG described in dot
2056 format. This loader and the corresponding examples require the
2057 installation of the graphviz library.
2058 * Fix a bug in the management of tasks of size 0 in the surf network
2059 models. This problem was only visible with SIMDAG and you should
2060 thus disregard results produced with earlier versions if you
2061 relied on this feature (some tasks were blocked because of this).
2062 * Fix a bunch of stuff that prevented to use classical models with SIMDAG
2063 even though your applications were doing only point-to-point
2064 communications and sequential computations. Now you can really use any
2065 model you want (of course, if you create real parallel tasks, which are
2066 not implemented in most models beside ptaskL07, this will abort).
2067 * Add an example that schedules a DAX on an heterogeneous platform
2068 using a Min-Min strategy.
2069 * New function SD_workstation_get_current_task() that returns the kind
2070 of task currently running on a workstation in the sequential access
2072 * Raise some warnings when unexecuted tasks remains at the end of the
2073 simulation. This is usually caused by cycles in the DAG.
2076 * New function: SIMIX_process_set_function() called by MSG_set_function
2077 * Change the underlying waiting queue in semaphores so that a process
2078 can wait on several of them simultaneously (as in waitany).
2079 * Fix the way to handle tokens in semaphores so that all access patterns
2080 work: {acquire, acquire_timeout, waitany} / {release, release_forever}.
2081 * kill the dirty pimple SIMIX_message_sizes_output()
2082 Please use (proper) visualization instead
2085 * New data container: setset (set of sets of elements)
2086 * New module: mmalloc (mapped malloc, allowing to have several
2087 independent segments of malloc)
2088 * New function: xbt_dict_cursor_set_data()
2089 * New functions: xbt_dynar_sort(), xbt_dynar_compare()
2090 * New function: xbt_dynar_is_empty()
2091 * New function: xbt_fifo_get_last_item()
2092 * Fix xbt_dynar_shrink(): use the right element size.
2093 * Fix xbt_dynar_set*(): allow index larger than current size and memset 0
2094 uninitialized areas during expand.
2095 * Fix semaphores: previous implementation was severely broken.
2096 * Use library init/fini functions for our initialization.
2097 - you can use logs and other feature as soon as you want in your
2098 code (even before the xbt_init / MSG_init)
2099 - xbt_exit is now a no-op and produce a warning when used.
2102 * Port GRAS to new SIMIX mechanisms. This allows gras users to
2103 benefit from the latest improvement to the simulation kernel.
2104 * Kill measurement sockets for now. If you rely on them, sorry. This
2105 release is not for you. This feature will be reintroduced in the
2106 future, but we cannot delay the release any further.
2107 * New function: gras_msgtype_get_name().
2108 * Implement gras_agent_spawn in RL too (the prototype changed a bit)
2109 * Fix (at last) the pmm example: it should not randomly fail anymore.
2111 Build chain: bug fixes and overall polishing
2112 * Cmake is now stable enough. Hence, we killed the autotools.
2113 * Port to windows ( TM :)
2114 * Fix the 'make install' target.
2115 No need to use 'make install-simgrid' anymore
2116 * Introduce a 'make dist' target compiling a *source* archive
2117 'make package' compiles a binary archive
2118 * Compile java files only on need
2119 * Add --cd and --setenv command line options to tesh
2120 * Out of source builds are not fully supported yet, but we are close
2121 * Enable supernovae and optimization flags by default for our users
2124 * Add layer to set up environment directly from lua, without XML.
2125 * The effect of gras_stub_generator can be achieved through
2126 lua too (check examples/gras/console/ping_generator.lua)
2128 -- Wed, 01 Dec 2010 22:09:23 +0100 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2130 SimGrid (3.4.1) stable; urgency=low
2132 The "Polishing easter eggs is probably a good idea" release.
2133 This is a bug fixes release only.
2137 * Fix a bug preventing the tasks from begin garbage collected.
2140 * Fix a bug occuring when a host involved in a communication fails.
2141 This was not detected properly by the other peer involved in the
2142 communication. Now, it's reported as a network error.
2145 * Warn the user about loop dependencies in data flow of DAX files
2146 * Obey the control-flow dependencies of DAX files
2149 * Add option "enable_smpi" allowing to not compile SMPI.
2150 Probably useful for the (Mac) users experiencing a build error here
2151 * Improve the detection of lua5.1 and ruby1.8
2153 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Tus, 04 May 2010 28 16:11:16 +0100
2155 SimGrid (3.4) stable; urgency=low
2157 The "Easter in Cargese" release. Also known as (major changes):
2159 * the "se habla Java, Ruby 話せます, fala-se Lua (and deaf-friendly)"
2160 ~> bindings were greatly improved
2161 ~> new tracing infrastructure for better visualization introduced
2163 * the "Welcome to configury modernity" release.
2164 ~> we switched from autotools to cmake, and improved our cdash
2167 A more detailled list of changes follow (full detail in svn log).
2169 Java Bindings: Various Cleanups
2170 * (install java-gcj-compat-dev on debian-like to use them)
2171 * Remove put/get: no need to export deprecated interface in Java
2172 Use send/receive instead.
2173 * Cleanup the examples and add a README per directory
2174 * Remove example autoDestination (that's the only way to go now)
2175 * Remove example explicitDestination (was a plain copy of basic)
2176 * Make JniException a runtime exception, so that there is no need to
2177 declare the fact that you may encounter such a beast. I guess that
2178 nobody will ever want to survive such error.
2179 * Create specific errors for each MSG case of failure:
2180 host failure, transfer failure, timeout, task cancelled
2181 * Cleanup the exceptions that may get thrown by each function
2182 * Other internal cleanups in Java bindings. Performance still bad :/
2183 Ruby and Lua Bindings: create them
2184 * (install ruby1.8-dev/liblua5.1-0-dev on debian-like to use them)
2185 * That's new and great, you should try them out.
2186 Same functionalities than Java bindings, only even less polished
2188 * Kill the useless "rate" argument of SD_task_get_execution_time()
2189 Everyone used to provide -1 as a value, it was not used, and the
2190 semantic of a possible use wasn't even clear.
2191 * SD_SCHED_NO_COST: Constant to use as cost in SD_task_schedule()
2192 either as comm costs or compute costs to mean that there is no
2193 such thing for that specific task.
2194 * Add a SD_task_set_name() function
2195 * Fix SD_task_unschedule() on typed tasks
2196 * Fix SD_task_get_execution_time() to return seconds, not flop*sec
2197 * In DAX loader, accept useless 'level' attributes to <job> since
2198 LIGO DAGs have them (seem to be to ease graphical representation).
2200 * Add an example masterslave_mailbox.c using send/receive and not
2201 the deprecated put/get interface.
2202 * Kill the MSG_paje_output() function. It's a noop since 2 years.
2203 * Kill MSG_WARNING and MSG_FATAL return codes: they were not used
2205 * Rename MSG_TIMEOUT_FAILURE into MSG_TIMEOUT for sake of logic
2206 (declare MSG_USE_DEPRECATED to still have the old name)
2207 * Add a MSG_task_set_data() function
2208 * About trace replay (see examples/msg/actions):
2210 - Allow to work with splitted trace files for each process
2211 Give the specific trace file as argument of each process,
2212 and call MSG_action_trace_run(NULL)
2213 You can still have one merged file for all processes.
2214 - Fix implementation of collective operations
2215 * Allow task_execute() on 0-sized tasks (closes #10063)
2217 * This is the first release of SimGrid where SMPI is not considered
2218 beta anymore (even if some corners should still be improved)
2219 * Port over the new SIMIX_network submodule (internal refactoring)
2220 * Basic support to log events as with SMPE (use --cfg=SMPE:1)
2221 * Implement more missing elements of the standard:
2223 - MPI_MAXLOC MPI_MINLOC + all associated datatype MPI_DOUBLE_INT,
2225 - MPI_Address() MPI_Get_count() MPI_Type_free() MPI_Type_extent()
2226 MPI_Scan() MPI_Get_processor_name()
2227 - Added implementation of missing case for Alltoall (warning: it's
2228 *not* the bruck variant from OpenMPI; based on Alltoallv instead)
2229 - SMPI_MPI_Gather() SMPI_MPI_Gatherv() SMPI_MPI_Scatterv()
2230 SMPI_MPI_Reduce_scatter() SMPI_MPI_Allgather()
2231 SMPI_MPI_Allgatherv()
2232 * Bug fixes include:
2233 - MPI_Waitsome() was broken
2234 - Allow relative includes in smpicc
2235 - Command line cfg argument 'reference_speed' was ignored...
2236 - Some functions did not properly lead to auto-benching of user code
2237 - smpicc passes -O2 by default (just like openmpi one)
2239 * add SIMIX_action_suspend() and SIMIX_action_resume() functions
2240 * Bug fixes about timeouts during communications
2241 * add SIMIX_message_sizes_output() as a pimple to write to file the
2242 amount of messages per size. Use gnuplot to get histogram.
2243 Pimple because that's the only user-visible function of simix,
2244 defined directly in xbt.h (irk, sorry)
2246 - Add a SIMIX_sem_get_capacity() function
2247 - Fix interactions with processe resume/suspende
2248 - release_forever() was stupidly broken
2249 - Fix SIMIX_display_process_status() for processes in a semaphore
2250 - Make SIMIX_sem_block_onto() user-visible
2251 * Refactoring context stuff:
2252 - Use pseudo-OOP for better modularity
2253 - reimplement SIMIX_process_kill() without process_schedule() so
2254 that the latter can take as invariant that it is called from
2256 - Merge context_start into context_new for sake of simplicity
2258 * Add a Vivaldi network model, coded live during SUD'10 ;)
2259 * Rename configuration variables to start a hierarchy:
2260 o cpu_model -> cpu/model
2261 o network_model -> network/model
2262 o workstation_model -> workstation/model
2263 * New configuration variables:
2264 o network/bandwidth_factor: correction to bandwith
2265 o network/latency_factor: correction to latency
2266 o netwotk/weight_S: correction to the weight of competing streams
2267 * Add a long description to the models, that users can see with such
2268 argument on the command line: --cfg=cpu/model:help
2269 * --help-models display the long description of all known models
2271 * config: add the ability to set a default value after registration
2272 Does not override any previously set value (e.g. from cmd line)
2273 * dict: allow to have integer key and data.
2274 When so, you need to use the following functions
2275 void xbt_dicti_set(xbt_dict_t dict, uintptr_t key, uintptr_t data);
2276 uintptr_t xbt_dicti_get(xbt_dict_t dict, uintptr_t key);
2277 void xbt_dicti_remove(xbt_dict_t dict, uintptr_t key);
2278 In contrary to regular dicts, the key is not malloced before copy.
2279 Mixing scalar and regular elements in the same dict is not tested
2281 * Allow to use xbt_dynar_shrink() to expend the dynar instead
2282 Tracing for Visualization:
2283 * SimGrid is now instrumented in order to generate a trace file for
2284 visualization analysis: to use it, need to compile SimGrid with the
2285 "tracing" option enabled, and instrument the program using SimGrid with
2286 TRACE_start, TRACE_category, TRACE_msg_set_task_category and TRACE_end
2287 (among other functions).
2288 * The instrumentation only traces the platform utilization for now
2289 * Documentation to use the tracing functions and how to analyze the
2290 traces with the Triva tool is written.
2291 * More information about: SimGrid FAQ (in the section Tracing Simulations
2294 * We moved to cmake as default build system. Autotools support will
2295 be dropped soon. Check the FAQ for more info about how to use it.
2296 * Greatly improved our cdash/ctest interactions
2297 Check http://cdash.inria.fr/CDash/index.php?project=Simgrid
2298 * Added memory checking tests with valgrind; lot of memleak fixing.
2299 This may be the first release of simgrid with so few memory issues
2300 * Added code coverage tests.
2301 Our coverage is still improvable, but at least we see it on cdash.
2303 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Wed, 28 Apr 2010 28 17:11:16 +0100
2305 SimGrid (3.3.4) stable; urgency=low
2307 The "Desktop Grid needs love too" release (also called Xmas release).
2309 Models improvements:
2310 * Major speedup in the maxmin system solving by using lazy evaluation
2311 Instead of solving completely the maxmin system at each iteration,
2312 only invalidate (and recompute) the modified parts.
2313 This new feature is enabled in default models but you can try to
2314 turn it on with "--cfg:maxmin-selective-update=1" for other models.
2315 * Cas01 IMproved as default CPU model
2316 This CPU model is the same Cas01 model, but it uses the
2317 maxmin-selective-update flag and a heap structure to manage
2318 actions on SURF kernel.
2319 It reduces the complexity to find the next action to finish and,
2320 consequently, it's faster than the old Cas01.
2321 This is the new default CPU model (Cas01).
2322 * Rename the old Cas01 model to Cas01_fullupdate
2323 Keep the old cpu model Cas01 with the new name of Cas01_fullupdate.
2324 Use "--cfg=cpu_model:Cas01_fullupdate" to use the old default CPU model.
2325 * CpuTI (CPU Trace Integration)
2326 A new CPU model whose objective is simulate faster when using
2327 availability trace files.
2328 Instead of using a full featured, over engineered maxmin system for
2329 CPU modeling, this model does the pre-integration of traces files
2330 to calculate the amount of CPU power available, and so, executes
2331 faster than the old CPU models.
2332 Use "--cfg=cpu_model:CpuTI" to change to this CPU model.
2333 * Use LV08 as default network model since it gives better accuracy
2334 for small messages and shouldn't change things for big ones.
2335 Use --cfg=network_model:CM02 to get the previous behavior.
2338 ******************************************
2339 *DO NOT MIX 3.3.4 RESULTS WITH OLDER ONES*
2340 ******************************************
2341 * The new CPU model may changes simulations!
2342 The point is that events occurring at the exact same timestamp
2343 are not scheduled in the same order with the old and new
2344 version. This may be enough to completely change the execution
2345 of simulations in some cases.
2346 * The new network model will change simulations!
2347 This new model is more realistic than the previous one, so you
2348 should consider redoing your old experiments with this model.
2349 Sorry for the inconvenience.
2352 * Introduce the supernovae compilation mode
2353 When compiled that way, the whole SimGrid (or almost) is put in a
2354 single compilation unit and compiled in one shoot.
2355 This is to help gcc which has difficulties to inline stuff from one
2357 The speedup seem to be above 15%, althrough more tests are needed on
2358 amd64 to confirm that gain.
2361 * Port of MSG's mailbox on top of SIMIX network
2362 The put/get mechanism was greatly simplified on the way.
2365 * New SIMIX network module. Provides:
2366 - Mailbox: rendez-vous mechanism to find with who you want to speak
2367 - Synchronous send/recv: easier and hopefully faster since the
2368 logic is handled in the maestro process directly now
2369 - Asynchronous send/recv: you dreamt of it? It's here now
2370 Too bad that nobody cared enough to propagate the change to MSG.
2371 * Add semaphores as SIMIX synchronization mechanism.
2374 * new function SD_daxload(char*) to load a DAX file
2375 (see http://vtcpc.isi.edu/pegasus/index.php/WorkflowGenerator)
2376 * Introduce typed tasks. Specify its kind and cost at creation.
2377 At scheduling, just give where it should be placed, and the cost
2378 for each involved resource is automatically computed.
2379 Existing constructors so far (more to come of course):
2380 - SD_task_create_comm_e2e() for end-to-end communication
2381 - SD_task_create_comp_seq() for sequential computation
2382 Use SD_task_schedulev() / SD_task_schedulel() to schedule them.
2383 * new function SD_task_dump() for debuging display
2384 * new function SD_task_dotty(task,FILE*) writing to file the info
2385 about the task in dotty format
2386 * SD_task_dependency_exists() can now cope with having one of its
2387 arguments NULL. If so, it tests whether the other argument has any
2389 * Add getters on list of preceding/following tasks:
2390 SD_task_get_parents(task) and SD_task_get_children(task)
2391 * Add getters on amount of workstations and list:
2392 SD_task_get_workstation_count(t) and SD_task_get_workstation_list(t)
2393 * Add getter on task kind: SD_task_get_kind(task)
2394 * Update the start_time and finish_time of tasks on completion/failure
2395 * Bugfix: Remove task from state swags when destroyed
2398 * New function: void gras_cpu_burn(double flops) -- a simple CPU burner
2401 * New function: xbt_dynar_dopar(dynar,fun) to map a function over the
2402 dynar with one separate thread per value of the dynar.
2403 * Change the prototype of xbt_thread_create(), sorry.
2404 Added a boolean parameter indicating whether we want to join this
2405 thread (used in SG only for now)
2406 * Implement xbt_thread_join and xbt_thread_yield in SG also.
2409 * GTNetS wrappers should now be usable again (and betterly tested too)
2410 * Fix a major regression from 3.2 where the timeout provided to
2411 MSG_task_put_with_timeout() was used as absolute time before which
2412 the comm should be done.
2413 * Start to fix the <cluster> tag.
2414 - Internal links should be good now (beside of the loopback, which
2415 use the private link instead)
2416 - paths to the external world is still rather broken
2417 - the <route:multi> tag is just broken. Actually that's brain-dead.
2418 We need sth like <route:multi src="myCluster" dst="$*-${myCluster}">
2419 to make it less stupid
2420 ** Check your platform with teshsuite/simdag/platforms/flatifier **
2421 * Fix a source-level compatibility glitch from 3.2: after defining
2422 MSG_USE_DEPRECATED, you can use the old name
2423 MSG_task_put_with_time_out() for MSG_task_put_with_timeout()
2424 * Allow to compile from the SVN with automake 1.11
2425 * Fix some problems when using the "start_time" tag in deployment XMLs.
2426 * Fix #8569: XBT/synchro.h has redundant declarations
2427 * Fix #8563: MSG return values and exceptions
2428 Introduce a MSG_TIMEOUT_FAILURE return code and use it consistently.
2429 * Integrate patch #8636: Obey DESTDIR when installing documentation.
2430 Thanks to Robson Peixoto.
2431 * Fix a vicious bug in dictionaries inducing that some elements were
2432 not freed on xbt_dict_free()
2434 Portability report of this version:
2435 * Main portability targets:
2436 - linux (ubuntu (804/810/910) /debian (4/5/testing) /fedora (core11))
2437 on (amd64/i386/ia64)
2438 - mac leopard on i386
2439 Known problems: http://cdash.inria.fr/CDash/index.php?project=Simgrid
2440 but nothing critical.
2441 * Other platforms: windows, AIX and others were not tested for this release
2443 Timing report of this version:
2444 * Lazy evaluation brings arbitrary speedup (ie, speedup depending on
2445 scenario parameters). From 8h to a few seconds in desktop grid settings.
2446 * Supernovae brings about 25% speedup on i386.
2448 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Thu, 24 Dec 2009 19:07:39 +0100
2450 SimGrid (3.3.3) stable; urgency=low
2452 The "Need for Speed" release.
2454 The timings done to validate the 3.3.2 were faulty.
2455 Instead of being 5% faster, it was 15% slower (compared to 3.3.1).
2457 The problem was a conversion from a manually handled vector to
2458 xbt_dynar_t on the critical path.
2459 xbt_dynar_foreach calls functions, inducing stack management crap.
2461 We inlined these functions and xbt_dynar_foreach is now breath taking.
2462 We also inlined xbt_swag_belong on the way.
2464 Here are some approximate speedup measurements (on master/slaves
2465 simulations lasting between 10s and 20s each):
2466 3.3.1 -> 3.3.2: about same performance
2467 3.3.2 -> 3.3.3: 40% speedup
2468 3.3.1 -> 3.3.3: 40% speedup
2469 3.3.1 with inline patch -> 3.3.3: 30% speedup
2471 Our reading is that the refactoring which occurred in 3.3.2 made us
2472 suffer much more from the xbt_dynar_foreach low performance, but
2473 once we solved this, this refactoring proved to be very performance
2474 effective. From the 40% speedup, somehow, 10% are due to the
2475 inlining and 30% to the refactoring.
2477 That's a pitty that gcc cannot inline functions placed in other files
2478 alone. We have to choose between:
2479 - break the encapsulation (by putting private data structures and
2480 accessors in headers files to help gcc)
2481 - live with low performance
2482 - switch to a decent compiler such as icc (not quite possible).
2484 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Thu, 20 Aug 2009 21:21:33 +0200
2486 SimGrid (3.3.2) stable; urgency=low
2488 The "Simplicity does not preceed complexity, but follows it" release.
2490 The main contributors of this release were (lexical order):
2491 Silas De Munck, Stéphane Genaud, Martin Quinson, Cristian Rosa.
2494 * Extract the routing logic into its own object.
2495 (was dupplicated in network.c and workstation_LV07.c;
2496 Allows to implement other ways of storing that info)
2497 => kill now useless network_card concept
2498 - Use dynar to represent routes (instead of void** + int*)
2499 - kill link_set (use surf_network_model->resource_set instead)
2500 - Add a command-line option to choose the routing schema to use
2501 - Add three new models:
2502 * Floyd (shortest path computed at initialization)
2503 * Dijikstra (shortest path recomputed all the time)
2504 * Cached Dijikstra (shortest path computed on need)
2505 All these models where contributed by Silas De Munck, and are
2506 described in his ICCS09 paper.
2508 * Simplify model declaration
2509 (less redirections, less function to write when defining a model)
2510 - Factorize stuff between models:
2513 surf_model_resource_set(model)
2514 surf_model_resource_by_name(model, name)
2515 - Unify the types of models in s_surf_model_t (using an union)
2516 - Embeed fields of common_public directly into s_surf_model_t
2517 - Rename model methods:
2518 action_free ~> action_unref
2519 action_change_state ~> action_state_set
2520 action_get_state ~> action_state_get
2521 - Change model methods into functions:
2522 (model)->common_public->action_use ~> surf_action_ref
2524 * Implement a generic resource; use it as ancestor to specific ones
2525 (allows to kill duplicated code in models)
2526 Drawback: timer command don't need no name nor properties;
2527 workstation_CLM03 don't need no properties
2528 (but I guess we can live with those few bytes wasted)
2530 * Improve the action object model
2531 - implement a constructor avoiding dupplicated code about field
2532 initialization in generic_action part.
2534 * Kill the SDP model: it has an external dependency, is deprecated
2535 in flavor of modern lmm models, and didn't compile since a while
2538 * Relocation of the context module from XBT to SIMIX.
2539 (the context were decoupled from the simix processes, duplicating a lot of code)
2540 => a lot of code was factorized
2541 - less overhead is introduced during scheduling
2542 - simpler API for the context factory
2543 - the logic for process creation,destruction and manipulation was simplified
2544 * Simplification of the s_smx_process_t data structure.
2545 => accesing the simix level data associated to a process is faster now,
2546 and the code is a lot more readable.
2549 * Implement some more MPI primitives:
2550 MPI_Bcast, MPI_Waitany, MPI_Waitall, MPI_Reduce, MPI_Allreduce, MPI_Scatter, MPI_Sendrecv, MPI_Alltoall
2551 -implementation: Bcast: flat or 2-ary tree (default),
2552 Barrier: 4-ary tree,
2554 Allreduce: Reduce then Bcast
2555 Alltoall: "basic_linear" if data per proc < 3Kb, "otherwise pairwise".
2556 Not yet implemented: "Bruck" for data per proc < 200b and comm size > 12
2557 Alltoallv: flat tree, like ompi
2559 * Add support for optimized collectives (Bcast is now binomial by default)
2560 * Port smpirun and smpicc to OS X
2563 * Kill SD_link_get_properties: hard to maintain and makes very little sense
2564 Shout out if you used it.
2567 * Display the list of still queued messages in SG mode when existing
2571 * Add xbt_set_get_by_name_or_null() [Silas De Munck]
2572 * Add xbt_graph_node_get_outedges() [Silas De Munck]
2573 * Add xbt_str_from_file(FILE*)
2574 * Add xbt_dict_get_key achieving a linear reverse search
2575 * Remove the context module
2577 Portability report of this version:
2578 * Main portability targets:
2579 - Linux(debian)/x86/context
2580 - Linux(debian)/x86/pthreads
2581 - Linux(debian)/amd64/context
2582 - Linux(debian)/amd64/pthreads
2583 On these, we still have the eratic breakages of gras/pmm and
2584 amok/saturate_sg reported in previous version. We still think
2585 that the tests are the cause of the fault, not the tested code.
2587 - Mac OSX Leopard/x86/context
2588 Still false negative in tesh autotesting.
2589 Smpi still fails, but this time because readlink does not accept -f
2590 Everything seems to work properly beside of that.
2593 - AIX version 5.3 (only tested contexts this time)
2594 Smpi still fails there because mktemp is not installed.
2595 Everything seems to work properly beside of that.
2597 I managed to compile it for the first time, but several breakages.
2598 Won't delay the release for this exotic platform.
2600 * Windows: it's still lagging behind. If you want to help, please
2603 Timing report of this version:
2604 This version seem to be more than 5% faster than 3.3.1 (on linux
2605 64bits with contextes). The gain is less than expected, we are
2606 investigating this for next release.
2608 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Wed, 19 Aug 2009 17:07:12 +0200
2610 SimGrid (3.3.1) stable; urgency=low
2613 * Implement a --cfg-help to show existing configuration variables
2614 * Build chain do not require doxygen in maintainer mode
2617 * fix a bug on struct sizeof computation, which prevented the
2618 exchange of arrays of structs in some conditions
2619 - added a regression test about this in datadesc_usage
2620 * Allow the exchange of 0-long dynamic vectors.
2621 - for that, use -1 as indicator of dynamic size instead of 0
2622 - This implied to change any size from unsigned long to long,
2623 reducing a bit communication abilities, but I guess that with
2624 64bits being quite common, this is more than enough.
2625 - This also induce a protocol change, thus bumping network protocol
2626 version from 0 to 1 (if we have external users, we have to get
2627 clean on that point too ;)
2628 - added two regression tests about this in datadesc_usage
2629 * Be more verbose when propagating local exceptions
2630 This helps debugging.
2631 * Display the status of simulated processes when receiving SIGINT in
2635 * Allow to control the simulation from a trace file.
2636 New functions MSG_action_register() and MSG_action_trace_run()
2637 The first one allows to associate a function execution to each
2638 kind of action while the second one parses a trace file and
2639 triggers the corresponding actions within the system.
2640 For now, only a toy example is provided in examples/msg/actions
2641 * Add an exemple of process migration in examples/msg/migration
2642 * Fix a bug in task exchange which broke MSG_task_get_sender()
2643 Add a teshsuite regression test for that.
2644 [Bug: if MSG_task_get_sender() is called after sender exit,
2646 * Fix a bug which prevented suspend/resume to work properly
2647 * Display the status of simulated processes when receiving SIGINT
2648 This fixes a regression of v3.3. due to the introduction of SIMIX
2649 * Bug fixing in failure management:
2650 - trace could not start by a failure at time 0
2651 - failure during communications were not working
2654 * Add SIMIX_process_set_name() to change the name of the current
2655 process in the log messages.
2656 * Store smx_hosts in a dict since we only retrieve them by name
2657 * Move the configuration infrastructure to surf
2660 * Move the configuration infrastructure to surf
2663 * Massive internal cleanups:
2664 - Store internal structures on processes instead of hosts (allows
2665 to have more than one process per host, in addition of being more
2667 - Cleanup the initialization/finalization process
2668 - Kill a whole bunch of unneeded synchronization:
2669 processes run in exclusive manner within the simulator
2670 - Move queues from global tables to process data fields
2672 - now accept -platform and -hostfile arguments
2673 - Pass the right rank value to processes according to the hostfile
2674 * Compile the examples by default, and use them as regression tests
2675 * Implement MPI_Wtime()
2676 * Change the reference speed to a command line option
2679 * TCP_gamma can now be specified as command line option using
2680 --cfg=TCP_gamma:10000000.0
2681 * Change the --surf-path cmd line option into --cfg=path:
2684 * Also include strbuff from xbt.h public header
2685 * xbt_ex_display(): do not free the exception after displaying
2686 This allows to do more with the given exception afterward.
2687 Users should call xbt_ex_free() themselves.
2691 Portability report of this version:
2692 * Main portability targets:
2693 - Linux(debian)/x86/context
2694 - Linux(debian)/x86/pthreads
2695 - Linux(debian)/amd64/context
2696 - Linux(debian)/amd64/pthreads
2697 These targets fail about 1/10 of times on gras/pmm, but we believe
2698 that this is because of the test, not because of simgrid.
2699 amok/saturate_sg fails even more rarely, and the test may not be
2702 - Mac OSX Leopard/x86/context
2703 The test suite still spits tons of errors because some obscure
2704 force prevents us from removing the temporary directories
2705 arguing that they still contain some metadata I've never heard of.
2706 Smpi fails because seq is not installed.
2707 Everything seems to work properly beside of that.
2710 - AIX version 5.3 (both contexts and pthread)
2711 Smpi still fails there because mktemp is not installed.
2712 XML inclusions seems rosty on AIX.
2714 * Windows: it's still lagging behind. If you want to help, please
2717 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Sat, 27 Jun 2009 00:14:30 +0200
2719 SimGrid (3.3) stable; urgency=high
2723 * JAVA BINDINGS for MSG (you dreamt of them? We made them)
2724 [Malek Cherier & Mt]
2726 * Introduce the SIMIX module: factorize code between MSG and GRAS.
2729 Until now, GRAS were using MSG as an interface to SURF. It was
2730 quite difficult because both interface have several differences
2731 (MSG channels vs GRAS sockets were the most notable point).
2733 This also opens the gate to SMPI (which should occur soon) and speed
2734 up simulations by to 40% (even if it were not the main goal).
2736 **************************************
2737 *DO NOT MIX 3.2 RESULTS WITH 3.3 ONES* Simix may changes simulations!
2738 **************************************
2739 The point is that events occuring at the exact same timestamp are
2740 not scheduled in the same order with the old and new version. This
2741 may be enough to completely change the execution of simulations in
2742 some cases. Sorry for the inconvenience.
2744 * Cleanup and upgrade the XML format to push further scalability
2745 issues (check http://hal.inria.fr/inria-00256883/ for more info)
2747 * Improve the testing infrastructure with tesh. Now a very large part of
2748 the code is tested not only by being run but also by checking that the
2749 output match an expected output [Mt].
2751 * Move on to FleXML v1.7 for the embeeded XML parsers. This version
2752 is really less memory-demanding, which should allow you to use
2753 larger files in SimGrid [AL].
2755 * Inform valgrind about our contextes, so that it becomes usable
2756 with the default (and more effecient) version of SimGrid
2757 [contributed by Sékou Diakite, many thanks]
2760 * Introduce a listener thread in charge of receiving incoming
2761 messages from the network. It allows to overlap communication and
2762 computation but most notably, it removes some stupid deadlocks due
2763 to the fact that so far, a process could not send and receive at
2764 the same time. This made most non trivial communication schema
2766 * Convert the PIDs from long int to int to match the MSG ones (and
2767 linux ones too) [Mt]
2768 * New function: gras_agent_spawn() to launch a new process on
2769 current host. Only working in simulation for now. [Mt]
2770 * New function: gras_os_hostport() returning a constant form (ie,
2771 not needing to be freed) of "gras_os_hostname():gras_os_myport()"
2774 * Make the backtrace of exceptions more human readable [Mt]
2775 * New module: xbt/str [Mt]
2776 a ton of string utility functions (split, join, printf to a newly
2777 allocated buffer, trim, etc)
2778 * New module: xbt/hash [Mt]
2779 SHA1 hashing algorithm (more to come if needed)
2780 * New module: xbt/synchro [Mt]
2781 synchronization tools (mutex and conditions) working the same way
2782 in simulation and in real life (mainly useful for GRAS, but not
2784 * New module: xbt/queue [Mt]
2785 classical producer/consumer synchronization scheme
2786 * xbt_dynar_new_sync() creates a synchronized dynar. All access
2787 (using the classical functions will get serialized) [Mt]
2788 * Make dictionary internal table dynamic. No need to specify its size
2789 anymore; functions xbt_dict_new_ext() and xbt_dict_hashsize_set()
2791 * Make sure the log channels are organized as a tree under windows
2792 (because of ANSI C compatibility issue, any channel were child of
2793 root directly) [Mt].
2796 * Cleaned many thing in surf and fixed a few bugs [AL].
2797 * Add a nice command line configuration mechanism to compose models [AL].
2798 * Add a new model for parallel tasks (ptask_L07) that is less buggy than
2799 the previous one (KCCFLN05). It relies on something that looks like
2800 a max-min sharing mechanism but cannot be written as such. A new solver
2801 was thus designed [AL].
2802 * Add a new solver to lmm. Based on Lagrange optimization and
2803 gradient-based descent, it enables to efficiently maximise systems s.a
2805 sum f_i(x_i) s.t Ax<= b with A_{i,j}>=0 and f_i a concave function.
2807 This solver enables to propose two new network models for TCP Reno and
2808 TCP Vegas based on Low's work. These models still need to be fully
2809 tested though [Pedro Velho].
2812 * Bug fix in SD_simulate. Now the time bound given as argument is
2814 * Use the new parallel task model (ptask_L07) as default.
2815 * Use the SURF command line configuration mechanism.
2816 * 0-size tasks (for synchronization) should now work.
2818 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Sun Apr 12 05:20:36 CEST 2009
2820 SimGrid (3.2) stable; urgency=high
2824 We still experience issues on this platform, but we believe that at
2825 least MSG is usable.
2827 GRAS API BREAKAGE (for simplification purpose, sorry):
2828 * the gras_msgtype_by_name is not used anymore. Instead of
2829 gras_msg_send(toserver, gras_msgtype_by_name("request"), &request);
2830 you can write (and must)
2831 gras_msg_send(toserver, "request", &request);
2832 - If you still want to pass a gras_msgtype_t to the function (to cache
2833 the type and avoid the lookup time), use the gras_msg_send_() variant.
2834 - Impacted functions:
2835 gras_cb_register, gras_cb_unregister, gras_msg_send, gras_msg_wait,
2836 gras_msg_rpccall, gras_msg_rpc_async_call, gras_msg_wait_ext
2837 * The callbacks are now expected to return 0 when everything went well
2838 (just like the main() function)
2840 GRAS new features and improvements:
2841 * New module mechanism where user code can use per process globals [Mt]
2842 This is similar to gras_userdata_*() functions, but for libraries. It
2843 factorize some code developped over and over in the examples and AMOK.
2844 It has still to be documented and used (only amok/peermanagement is
2846 * Fix a vicious bug in the TCP buffering mechanism which leaded to message
2847 loss when they were small enough to fit into the buffer and sent quickly
2848 enough so that they can all get received in one shoot.
2849 * gras_datadesc_by_name and gras_msgtype_by_name: now raise an exception
2850 if not found. Use the *_or_null() variant for the old semantic.
2851 * In gras_msg_handle, do not discard messages without callback.
2852 They are probably messages to be explicitly awaited later (ie, proofs of
2853 mis-synchronization in userland since they are sent before being awaited)
2854 No big deal usually.
2855 * gras_socket_meas_send/recv: semantic changed!
2856 The numerical arguments used to be (1) the total amount of data to send
2857 and (2) msg_size. This was changed to (1) msg_size and (2) amount of
2858 messages. This was need for the fool willing to send more than MAXINT
2859 bytes on quite fat pipes.
2862 * Do really rename the hostmanagement module to peermanagement. [Mt]
2863 Ie, rename functions from amok_hm_* to amok_pm_*. This breaks the API,
2864 but this is rather new and this was documented in the module
2865 documentation (poor excuses, I admit)
2866 * Bandwidth measurement semantic changed! This follows the changes to
2867 gras_socket_meas_send/recv explained above.
2870 * A sequential mode has been added to the workstations. When a workstation
2871 is in sequential mode, it can execute only one task, and the other tasks
2872 are waiting in a FIFO. [Christophe Thiery]
2875 * The KCCFLN05 workstation model now handles parallel tasks. It is the
2876 model for SIMDAG. [Christophe Thiery]
2877 * Bug fix in the maxmin solver: Some values were close to 0 instead of
2878 equal to 0, which caused some bad behaviors in
2879 saturated_constraint_set_update. I now use a threshold mechanism like in
2883 * When running manually src/testall, you select specific units [Mt]
2884 testall is the result of our cunit mechanism, and should replace all
2885 the scripty thingy around since bash don't run easily on billware.
2887 * A mallocator system has been added. [Christophe Thiery]
2888 Mallocators allow you to recycle your unused objects instead of freeing them
2889 and allocating new ones.
2891 Documentation update:
2892 * FAQ reworking + New FAQs:
2893 - "Valgrind spits tons of errors!" [Mt]
2894 - "How to repport bugs" [Mt]
2895 - "Cross-compiling a Windows DLL of SimGrid from Linux" [Mt]
2896 - "What is the difference between MSG, SimDag, and GRAS?" [Mt]
2897 - Communication time measurement within MSG [AL]
2898 - I experience weird communication times when I change the latency [AL]
2899 * GRAS tutorial [Mt]
2901 - an introduction to the framework and to the used communication model
2902 - an initiatic tour introducing the most proheminent features:
2904 . Lesson 0: Installing GRAS
2905 . Lesson 1: Setting up your own project
2906 o Part 2: Message passing
2907 . Lesson 2: Exchanging simple messages
2908 . Lesson 3: Passing arguments to the processes (in SG)
2909 . Lesson 4: Attaching callbacks to messages
2910 . Lesson 5: Using globals in processes
2911 . Lesson 6: Logging information properly
2912 . Lesson 7: Using internal timers
2913 . Lesson 8: Handling errors through exceptions
2914 . Lesson 9: Exchanging simple data
2915 . Lesson 10: Remote Procedure Calling (RPC)
2916 . Lesson 11: Explicitely waiting for messages
2917 . Recapping of message passing features in GRAS
2918 - A HOWTO section containing:
2919 o HOWTO design a GRAS application
2920 More are due, of course. They will come latter. In the meanwhile, you can
2921 check the examples which are still here.
2923 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri Mar 16 21:11:46 CET 2007
2925 SimGrid (3.1) stable; urgency=high
2929 There was a stack corruption somewhere, visible only when optimizing
2930 with these versions. [Vince]
2933 * This is a NEW module! SimDAG (SD for short) is a revival of the old SG
2934 module that enabled to play with Directed Acyclic Graphs. It is built
2935 directly on top of SURF and provides an API rather close to the old
2936 SG. Some old codes using SG are currently under rewrite to check that
2937 all needful functions are provided. [Christophe Thiery]
2940 * Complete rewrite of the KCCFLN05 workstation model. It is now an
2941 extension of the classical CLM03 model that gracefully handles
2942 failures. This is now the default model for MSG and GRAS. It doesn't
2943 handle parallel tasks yet though. [AL]
2944 * Bug fix: Weights were not correctly set in the network part.
2945 WARNING: This may have resulted in incorrect results with simulations
2946 where there are more than one flow on a given link. [AL]
2949 * After a (long ?) discussion on simgrid-devel, we have decided that the
2950 convention we had on units was stupid. That is why it has been decided
2951 to move from (MBits, MFlops, seconds) to (Bits, Flops, seconds).
2952 WARNING: This means that all previous platform files will not work as
2953 such with this version! A warning is issued to ask users to update
2955 A conversion script can be found in the contrib module of the CVS, under
2956 the name contrib/platform_generation/surfxml_update.pl [MQ]
2959 * Bug fix: Processes were started in reverse order, wrt deployment file.
2960 WARNING: if your code relies on this bug, please fix it. [AL]
2961 * Bug fix: Add a test in MSG_task_execute to stop whenever a task is
2962 being executed on two different locations. [AL]
2963 * Bug fix: Failures are now better supported thanks to Derrick's tests
2964 (there was many failure situations I hadn't thought of and that weren't
2965 correctly handled). [AL]
2966 * New function: MSG_host_is_avail indicates you whether a given m_host_t
2970 * New! a real RPC mechanism, as it ought to be since too long. [MQ]
2971 Exception occurring on server-side are propagated back to client (!).
2973 API CHANGE: the callback changed their prototype. Change:
2974 int my_handler(gras_socket_t expeditor, void *payload_data) {
2976 int my_handler(gras_msg_cb_ctx_t ctx , void *payload_data) {
2977 gras_socket_t expeditor=gras_msg_cb_ctx_from(ctx);
2979 * New! function: gras_msg_handleall to deal with all messages arriving
2980 within a given period.
2981 * New! function: gras_socket_server_range to get a server socket in a
2982 range of port numbers (ease to avoid port number conflicts) [MQ]
2983 * New! gras processes display their backtrace when they get a SIGUSR1
2984 or when Ctrl-C is pressed. Use Ctrl-C Ctrl-C to exit.
2985 Sweet to debug RL processes [MQ]
2989 - Do not force experiment sizes to be expressed in kb, or it becomes
2990 impossible to measure the latency this way (needs one byte-long tests)
2991 WARNING: this changes the amok_bw_* function semantic. [MQ]
2992 - Implements the link saturation stuff. [MQ]
2993 * Peer management module:
2994 New! module factorizing code that we wrote over and over [MQ].
2997 * New module: cunit (my jUnit implementation in ansi C) [MQ]
2998 - Test units are placed directly into the library code, they get extracted
2999 automatically and placed into the src/testall binary.
3000 - Convert most of the XBT tests to this system.
3001 * New functions: xbt_dynar_getfirst_as() and xbt_dynar_getlast_as() [MQ]
3002 * XML parsing: rewrote parts of flexml to enable multiple xml parsers to
3003 live in the same C code. This required to change a little bit the API
3004 of surfxml parsing but shouldn't be an issue for end-users. [AL]
3005 * New module: sparse graph structure with basic algorithms (this is work
3006 in progress and the API is not considered to be frozen yet). [AL]
3007 * Display more information on backtraces: source line & function names are
3008 now displayed just like valgrind does (rely on addr2line tool) [MQ]
3009 * New function: xbt_backtrace_display(). Sweet while debuging [MQ]
3010 * Reworked a little bit some #include statements to load only required
3011 headers. Some user code that relied on SimGrid to include stdlib or
3012 stdio may need to include it by themselves. [AL]
3013 * Fixed xbt/log.h. A missing SG_BEGIN_DECL prevented compilation with
3015 * Renamed xbt_host_t into xbt_peer_t since it betterly describes what I
3016 meant. This breaks the API of AMOK and of xbt/config. Sorry about this,
3017 but I guess that almost nobody used those parts. [MQ]
3019 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 14 Jul 2006 01:32:27 +0200
3021 SimGrid (3.0.1) stable; urgency=low
3024 * Unfortunately, I had missed 5 misnamed functions:
3025 xbt_fifo_item_t xbt_fifo_newitem(void);
3026 void xbt_fifo_freeitem(xbt_fifo_item_t);
3027 xbt_fifo_item_t xbt_fifo_getFirstItem(xbt_fifo_t l);
3028 xbt_fifo_item_t xbt_fifo_getNextItem(xbt_fifo_item_t i);
3029 xbt_fifo_item_t xbt_fifo_getPrevItem(xbt_fifo_item_t i);
3030 They're now deprecated. Please use their new versions:
3031 xbt_fifo_item_t xbt_fifo_new_item(void);
3032 void xbt_fifo_free_item(xbt_fifo_item_t);
3033 xbt_fifo_item_t xbt_fifo_get_first_item(xbt_fifo_t l);
3034 xbt_fifo_item_t xbt_fifo_get_next_item(xbt_fifo_item_t i);
3035 xbt_fifo_item_t xbt_fifo_get_prev_item(xbt_fifo_item_t i);
3037 * Bugfix: really disconnect fifo items which are remove_item()ed [AL]
3038 * Documentation: xbt_log module unmercifully reworked [MQ]
3039 * Bugfix: there was a problem with the ending of contexts with
3040 the pthread backend. It caused some weird deadlock or behavior
3041 depending on the pthread implementation. [AL]
3042 * Bugfix: get the exceptions raised in the simulator repport where
3043 and why they come from when they are not catched in time [AL, MQ]
3046 * Bugfix: Do repport the error when two non-connected hosts try to
3047 exchange data (Thanks to Flavien for stumbling into this one) [AL]
3050 * Add additionnal checkings on communications. Assert that two
3051 communicating hosts are connected by a set of links... [AL]
3054 * Add additionnal checkings on channel values in communication [AL]
3055 * New: MSG_task_get_source to see on which host a task was generated [HC]
3056 * New: int MSG_task_probe_from_host(int channel, m_host_t host): returns
3057 the number of tasks waiting to be received on channel and sent
3059 * New: MSG_error_t MSG_task_get_from_host(m_task_t * task, int channel, m_host_t host);
3060 waits for the first task coming from a given host.. [AL]
3062 GRAS new functionnalities: [MQ]
3063 * Enhance the parsing macro to allow the size of multidimentional objects
3064 to be given thru annotations.
3065 * New example (and documentation): Matrix Multiplication a la RPC
3066 (as when I was young!) and fix a bunch of bugs found on the way.
3068 GRAS performance improvements: [MQ]
3070 * Reduce the amount of cbps creation/destruction by making it static to
3071 datadesc_send/recv() and using a (newly created) cbps_reset (based on
3074 * Change libdata to a set so that we can search for stuff by ID (and thus
3075 reduce the insane amount of dict lookups)
3078 * Actually implement gras_datadesc_copy() so that we don't have to mimick
3079 RL communication on top of SG since it's so uneffective.
3080 It may also be used for inter-thread communication in RL, one day.
3081 * Use gras_datadesc_copy() to exchange messages on top of SG
3083 - improve message exchange performance on top of SG
3084 - deprecate transport_plugin_sg.c:gras_trp_sg_chunk_send() & recv()
3085 * Don't exchange on the network the size of the used part of buffer,
3086 instead, specify the possible buffer size to read().
3088 - reduces the amount of read/write calls (one pair per exchange)
3089 - reduces the amount of exchanged data (the size)
3090 - allows to retrieve all arrived data on receiver side, if we don't need
3091 it right now (subsequent read will peek the buffer)
3092 - allows the receiver to proceed with the begining of the stream before
3093 everything is arrived
3094 - make it possible to build an iov transport (using readv/writev)
3096 - take care of the data with non-stable storage (like stacked data),
3098 * If possible, TCP send uses vector I/O (when writev() is here)
3099 - Don't use it for receive since we send data sizes and data on the
3100 same stream, so we wouldn't be able to chain large amount of chunks
3101 before having to flush the stuff to read the size.
3102 * Rework the transport plugin mechanism to simplify it and reduce the
3103 amount of pointer dereferencement when searching for the right function
3106 * I guess that now, we do almost as few system calls as possible while
3107 doing as few data copy as possible.
3109 To improve it further, we could try to send all the sizes first and then
3110 all the data (to use iov on receiving size), but it's only a partial
3111 solution: when you have 2 dimensional data, the sizes of the second
3112 dimension is data of the first dimension, so you need 3 streams.
3114 I'm not sure the potential performance gains justify the coding burden.
3116 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 21 Oct 2005 14:42:20 +0200
3118 SimGrid (3.00) stable; urgency=high
3121 * New! Give the possibility to hijack the surf parser and thus bypass
3122 MSG_create_environment and MSG_launch_application. Have a look at
3123 examples/msg/msg_test_surfxml_bypassed.c to see how it can be done.
3125 -- Arnaud Legrand <simgrid-devel@lists.gforge.inria.fr> Sat, 20 Aug 2005 23:25:25 -0700
3127 SimGrid (2.96) unstable; urgency=low
3132 * New! Exception handling with setjmp or such (code from OSSP ex) [MQ]
3133 This deprecates the xbt_error_t mechanisms.
3134 It modifies (simplifies) all XBT and GRAS API.
3135 MSG API keeps unchanged (exceptions raised by XBT are catched from
3136 within MSG and masked with existing error handling facilities)
3139 * New! Add a FATPIPE model. [AL]
3140 * New! Add a parallel task model. [AL]
3141 * New! Add automatically a loopback interface (in the default
3142 network model) if none was precised.
3145 * Bugfix: MSG_process_resume now works with the current running process.
3147 * New! Add MSG_parallel_task_create and MSG_parallel_task_execute. [AL]
3148 * Modification of MSG_task_get_compute_duration. Once a task has been
3149 processed, the value returned by this function is now equal to 0. [AL]
3150 * New! Add double MSG_task_get_remaining_computation(m_task_t task) and
3151 MSG_error_t MSG_task_cancel(m_task_t task). Add a state
3152 (MSG_TASK_CANCELLED) to MSG_error_t corresponding to the cancelation
3153 of a m_task. For now, MSG_task_cancel only works with computation
3155 * New! Add double MSG_get_host_speed(m_host_t h) that returns the speed
3156 of the processor (in Mflop/s) regardless of the current load on the
3158 * API Change: use proper naming convention for MSG_getClock and
3159 MSG_process_isSuspended: MSG_get_clock and MSG_process_is_suspended.
3161 * New! Add void MSG_task_set_priority(m_task_t task, double priority).
3162 This function changes the priority of a computation task. This priority
3163 doesn't affect the transfer rate. A priority of 2 will make a task
3164 receive two times more cpu power than the other ones. This function
3165 has been added to suit the needs of Nguyen The Loc and hasn't been that
3166 much tested yet. So if it fails, please report it and send me your code.
3168 * API Change: removed all functions and types that were marked "deprecated"
3169 since many months. Renamed MSG_global_init_args to MSG_global_init.
3171 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Mon, 8 Aug 2005 17:58:47 -0700
3173 SimGrid (2.95) unstable; urgency=low
3176 * Steal some nice code to GNU pth to fix context detection and usage [AL]
3177 * Cleanup in the xbt_config API; add configuration callbacks. [MQ]
3178 * Cleanup in the initialization API: the unused "defaultlog" is dead. [MQ]
3181 * Bugfix: Allow absolute paths for platform description files [MQ]
3182 * Bugfix: do free the variables after use. Leads to drastic performance
3184 * Implement max_duration (ie, timeouts) on resources [AL]
3187 * Implement MSG_config to configure MSG at runtime. xbt_cfg test on a real
3189 * Implement MSG_channel_select_from() to help GRAS now that SURF provide
3190 the needed support (timeouts) [AL]
3193 * Implement measurement sockets. You can now get the bandwidth between two
3194 hosts thanks to AMOK (see below). [MQ]
3195 * gras_datadesc_dynar() builds a dynar type descriptor, allowing to send
3196 dynar over the network (yeah) [MQ]
3197 * Real (even if simplistic) implementation of gras_os_myname() on RL [MQ]
3198 * simple/static token-ring example. [Alexandre Colucci and MQ]
3199 * Use MSG_channel_select_from() and remove the *slow* hack we had to put
3200 in place before [MQ]
3203 * Differentiate the types "char[22]" and "unsigned char[22]" in automatic
3204 type parsing. "short" and "long" modifiers were also ignored; other
3205 modifier (such as reference level) are still ignored. [MQ]
3206 * Embeed the buffer size within the buffer itself on SG. [MQ]
3207 That way, send() are atomic and cannot get intermixed anymore (at least
3208 the ones which are less than 100k; bigger messages still have the issue)
3209 * Array size pushed by the field, not by the field type (or each
3210 and every long int will push stuff to the cbps) [MQ]
3211 * use select() to sleep since it allows to portably sleep less than one
3214 GRAS (minor cleanups)
3215 * <project>.Makefile.local (generated from gras_stub_generator) |MQ]:
3218 * Type Callbacks now receive the gras_datadesc_type_t they work on as argument.
3219 * type category 'ignored' killed as it was never used and were difficult
3221 * whether a type can cycle or not is now a flag, leaving room for more
3222 flags (as "ignored", if we feel the need one day ;)
3223 * Rename raw sockets to measurement sockets since "raw" has another
3224 meaning in networking community.
3227 * Advanced Metacomputing Overlay Kit introduction. It is based over GRAS
3228 and offers features not belonging to GRAS but that most applications
3229 need. One day, it may be a set of plugins loadable at runtime.
3230 * New module: bandwidth
3231 bandwidth measurement between arbitrary nodes running this module. [MQ]
3233 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Thu, 30 Jun 2005 16:29:20 -0700
3235 SimGrid (2.94) unstable; urgency=low
3237 The first beta release of SimGrid 3 !
3241 * Update the main page and the FAQ. Adding references to gforge.
3244 * Add a gras_os_getpid function.
3247 * Add MSG_task_get_compute_duration() and MSG_task_get_data_size()
3248 * Extend the logs so that they also print PID, hostname, date, ... if
3250 * Convert the MSG example to the use of xbt_logs instead of PRINT_MESSAGE,
3251 and kill the old version which were in testsuite/
3252 * Rewrite tools/MSG_visualization/colorize.pl for using with logs instead
3256 * Add xbt_os_time(). As the rest of xbt/portability, this is not public
3257 for users. Instead, each programming environment (GRAS, MSG,...) use it
3258 when needed to provide such a feature to users.
3259 Don't shortcut the mechanism or you will also shortcut the virtualization
3260 you need on the simulator.
3264 * Cleanups in configury with regard to compile optimization/warning flags.
3265 Also add -fno-loop-optimize to any powerpc since it's the optimization
3266 killing gcc (< 3.4.0).
3267 * Doxygen cleanups: move MSG examples, kill the second Doxygen phase
3268 needed by MSG examples complications
3269 * Borrow configury beautifications from PHP
3272 * Bugfix: XBT_LOG_NEW_DEFAULT_CATEGORY now compiles without compiler
3273 warning (thanks loris for stumbling into this one).
3274 * Bugfix: stop loading private headers (gras_config.h) from the public
3278 * Change SIMGRID_INSTALL_PATH to GRAS_ROOT in Makefiles generated for user.
3279 * Rename gras_get_my_fqdn to gras_os_myname and implement it in the simulator
3280 RL would imply a DNS resolver, which is *hard* to do in a portable way
3281 (and therefore delayed).
3282 * Implement a real timer mechanism and use it in timing macros. This allows
3283 to avoid rounding errors and get a 0.000005 sec precision in timing
3284 macros. While I was at it, various cleanups:
3285 - allow to declare more than one timed section per file (fix a stupid bug)
3286 - move some private declaration to the right place
3287 - merge conditional execution and timing macros into emulation module
3288 - document the module
3289 - make sure the module cleanups its mess on gras_exit
3290 * Documentation improvements:
3291 - (new) how to compile applications using GRAS
3292 - (new) emulation support (timing macros)
3294 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 13 May 2005 10:49:31 +0200
3296 SimGrid (2.93) unstable; urgency=low
3298 Alpha 4 on the path to SimGrid 3 (aka the "neuf-trois" version)
3301 - Use Paje properly where used. Still to be sanitized properly.
3302 - Portability fix: Add an implementation of the contexts using pthread
3306 - Add xbt_procname(): returns the name of the current process.
3307 Use it to show the current process's name in all logging.
3309 - fix detection of older flex version and the reaction, since we do
3310 depend on modern ones (we use lex_destroy)
3311 - Better separation of SG and RL in the libs: remove all simulation code
3312 from libgras. As a result, this lib is now only 200k when stripped.
3313 Some of the xbt modules may also be duplicated (two sets and such) and
3314 should be cleaned/killed before SG3.
3315 - Insist on using xlC on AIX because of weird problems involving gcc there.
3316 - Cleanup the make remote stuff. This is now done by scripts
3317 tools/graspe-{master,slave} (GRAS Platform Expender). This is still
3318 mainly for our private use, but we're working on changing them to user
3321 - Bugfix: flush the socket on close only if there is some *output*.
3322 - Bugfix: flush idempotent when there's nothing to send (don't send size=0)
3324 - Add MSG_task_get_name. The task names are mainly for debugging purpose,
3327 -- SimGrid team <simgrid2-users@listes.ens-lyon.fr> Fri, 4 Mar 2005 14:32:37 -0800
3329 SimGrid (2.92) unstable; urgency=low
3331 Alpha 3 on the path to SimGrid 3
3335 - New! First try of benchmarking macros.
3336 - New! First try so that gras_stub_generator generate deployment and
3337 remote compilation helpers.
3339 - Bugfix: Initialization fix in msg_test.
3343 - Bugfix: applied patch to lexer so that it doesn't need a huge heap.
3345 - Bugfix: let dicts work with NULL content (_foreach didn't) and cleanups
3347 - API Change: gras_os_sleep to take the amount of seconds as a double.
3348 Accepting an int was error prone since it was the only location where
3349 seconds were coded as such. It leaded to damn rounding errors.
3350 - Bugfix: Hard to belive that timers ever worked before this.
3352 -- SimGrid team <simgrid2-users@listes.ens-lyon.fr> Wed, 23 Feb 2005 22:09:21 +0100
3354 SimGrid (2.91) unstable; urgency=low
3356 Alpha 2 on the path to SimGrid 3
3360 - Bug fix in the lmm_solver.
3362 - New! Interface to Paje (see http://www-id.imag.fr/Logiciels/paje/)
3363 through the function MSG_paje_output.
3364 - New! Introducing two new functions MSG_process_kill() and MSG_process_killall().
3365 - It is possible to bound the rate of a communication in MSG with
3366 MSG_task_put_bounded() (was already in the previous version but I had forgotten
3367 to write it in the changelog).
3368 - Bug fix to let GRAS run on top of MSG until we move it directly on top
3373 - Various cleanups to the autotools stuff
3374 - Begin to move Gras examples to examples/gras/
3375 - Let make distcheck work again (yeah!)
3377 - documentation overhauled using doxygen.
3378 gtk-doc-tools is dead in SimGrid now.
3379 - Automatically extract all existing logging categories, and add the list
3380 to the documentation (long standing one, to say the less)
3382 - Cleanup the known architecture table. Reorder the entries to group what
3383 should be, and use a more consistent naming scheme.
3384 (some of the test dataset are still to be regenerated)
3385 - New! Allow library to register globals on each process just as userdata
3387 This is implemented using a xbt_dict and not a xbt_set, so we loose the
3388 lookup time (for now).
3389 Use it in msg and trp.
3390 This cleans a lot the internals and helps enforcing privacy of the
3391 headers between the gras components.
3392 - New! Add a timer mechanism, not unlike cron(8) and at(1).
3393 - Bugfix: gras_os_time was delirious in RL.
3394 - Bugfix: gras_trp_select/RL don't run into the wall when asked to select
3396 - Reenable GRAS now that it works.
3398 -- Arnaud Legrand <Arnaud.Legrand@imag.fr> Mon, 14 Feb 2005 14:02:13 -0800
3400 SimGrid (2.90) unstable; urgency=low
3402 Alpha 1 on the path to SimGrid 3
3404 * It is a long time since the last release of SimGrid. I'm sorry about
3405 that but as I had told you, I was rewriting a lot of things. I apologize
3406 to those who had been reporting bugs to me and that I had not answered.
3407 If your bug is still in the new version, please tell me. Here is a
3408 summary of the main changes.
3410 * REVOLUTION 1: The SimGrid project has merged with the GRAS project
3411 lead by Martin Quinson. As a consequence SimGrid gains a lot in
3412 portability, speed, and a lot more but you'll figure it out later.
3413 SimGrid now comprises 3 different projects: MSG, GRAS and SMPI.
3414 I wanted to release the new MSG as soon as possible and I have
3415 broken GRAS, which is the reason why, for now, only MSG is fully
3416 functional. A laconic description of these projects is available
3417 in the documentation.
3419 * REVOLUTION 2: I have removed SG and I am now using a new simulation
3420 kernel optimized for our needs (called SURF but only the developers
3421 should use it). Hence, MSG is now roughly 30 times faster and I think
3422 that by rewriting a little bit MSG, I could event speed it up a little
3423 bit more. Beside the gain in speed, it is also much easier to encode a
3424 new platform model with SURF than it was with SG. More to come...
3426 * REVOLUTION 3: I have tried to change a little as possible the API of
3427 MSG but a few things really had to disappear. The main differences
3428 with the previous version are:
3429 1) no more m_links_t and the corresponding functions. Platforms are
3430 directly read from a XML description and cannot be hard-coded
3431 anymore. The same format is used for application deployment
3432 description. The new format is described in the documentation.
3433 Have a look in tools/platform_generation. There is a tiny script
3434 that converts from the old platform format to the new one. Concerning
3435 the application deployment format, parsing the old one is tricky.
3436 I think most of you should however be able to convert your files. If
3437 it is really an issue, I can write a C code that does the conversion.
3439 2) the toolbox tbx does not exist anymore. We now have a library
3440 with much more data-structures but without the hash-tables (we have
3441 dictionaries that are much faster).
3443 -- Arnaud Legrand <Arnaud.Legrand@imag.fr> Mon, 31 Jan 2005 10:45:53 -0800
3445 *****************************************************************************
3446 * Follows the old GRAS changelog. It does not follow the same syntax, but I *
3447 * don't feel like converting the oldies. (Mt) *
3448 *****************************************************************************
3451 Version 2.90: "the long awaited one"
3452 - Finished rewriting and debugging MSG. Rewrote the documentation.
3453 - disable GRAS for now since it needs to be ported to the newest SG
3456 - Finish the port to windows (using mingw32 for cross-compile)
3459 - Main loop and datastructures of SURF. A cpu resource object is
3460 functional. Surf can thus be used to create cpu's with variable
3461 performance on which you can execute some actions.
3463 2004-11-15 Martin Quinson
3464 - Port to ARM. Simply added the alignment and size descriptions. Should
3465 work, but the ARM machines are so slow that I didn't had the opportunity
3466 to 'make check' over there yet.
3468 2004-11-15 Arnaud Legrand
3469 - Trace manager now written. It uses a heap structure and is therefore
3470 expected to be efficient. It may however be speeded up (particularly
3471 when many events occur at the same date) by using red and black
3472 trees. One day maybe...
3473 - Max-min linear system solver written. It uses a sparse matrix
3474 structure taking advantage of its expected use. Most operations are
3475 O(1) and free/calloc are called as few as possible. The computation of
3476 the minimum could however be improved by using a red and black tree
3479 2004-11-03 Arnaud Legrand
3480 - Rename every gras_* function that was in xbt/ to its xbt_
3482 - Add a heap and a doubly-linked list to xbt
3483 - Added a dichotomy to the dictionaries. make check works as well before
3484 so I assume that the patch is correct. I do not know however if things
3485 run effectively faster than before now. :)
3487 Inclusion of the SimGrid tree in the GRAS one. The archive is renamed to
3488 SimGrid, and the version number is bumped to 2.x
3490 2004-10-29 Martin Quinson
3491 - Introduction of the remote errors.
3492 They are the result of a RMI/RPC on the remote machine.
3493 ErrCodes being scalar values, you can't get the host on which those
3494 errors did happen. Extending the error mechanism as in Gnome is possible.
3495 No idea yet whether it is a good idea.
3497 2004-10-28 Martin Quinson
3498 - Interface revolution: the Starred Structure Eradication.
3499 I used to do typedef struct {} toto_t; and then handle *toto_t.
3500 Arnaud (and Oli) didn't like it, and I surrendered. Now, you have:
3501 - ???_t is a valid type (builded with typedef)
3502 - s_toto_t is a structure (access to fields with .)
3503 - s_toto is a structure needing 'struct' keyword to be used
3504 - e_toto_t is an enum
3505 - toto_t is an 'object' (struct*)
3507 typedef struct s_toto {} s_toto_t, *toto_t;
3508 typedef enum {} e_toto_t;
3509 Moreover, only toto_t (and e_toto_t) are public. The rest (mainly
3510 s_toto_t) is private.
3512 - While I was at it, all gras_<obj>_free() functions want a gras_<obj>_t*
3513 so that it can set the variable to NULL. It was so for dicts and sets,
3514 it changed for dynars.
3516 - Fix a bunch of memleaks in dict_remove
3517 - Fix a bug in sg/server_socket opening: it failed all the time.
3519 2004-10-07 Martin Quinson
3520 - Speed up dynar lookup operation a bit.
3522 gras_dynar_get is dead.
3524 Now, you can choose between gras_dynar_get_cpy (the old gras_dynar_get
3525 but should be avoided for efficiency reasons) and gras_dynar_get_ptr
3526 (which gives you the address of the stored data).
3528 gras_dynar_get_as is an helpful macro which allows you to retrieve a
3529 copy of the data using an affectation to do the job and not a memcpy.
3531 int toto = gras_dynar_get_as(dyn,0,int); rewrites itself to
3532 int toto = *(int*)gras_dynar_get_ptr(dyn,0);
3534 It does not really speedup the dynar test because they are
3535 setting elements all the time (and look them seldom). But the dict does
3536 far more lookup than setting.
3538 So, this brings the dict_crash test from ~33s to ~25s (200000 elms).
3540 2004-10-05 Martin Quinson
3541 - Allow to (en/dis)able the cycle detection at run time.
3543 Whether we should check for cycle or not is now a property of each
3544 datatype. When you think there may be some cycle, use datadesc_cycle_set.
3545 datadesc_cycle_unset allow to remove this property when previously set.
3547 Note that the cycle detection is off by default since it impacts the
3548 performance. Watch the data you feed GRAS with ;)
3550 This property is hereditary. Any element embedded in a structure having it
3551 set have it set for the time of this data exchange.
3553 You should set it both on sender and receiver side. If you don't set it on
3554 sender side, it will enter an endless loop. If you forget on receiver
3555 side, the cycles won't be recreated after communication.
3557 - Header reorganization.
3558 Kill gras_private.h, each submodule must load the headers it needs.
3560 2004-10-04 Martin Quinson
3561 - Interface revolution: do not try to survive to malloc failure.
3563 Now, gras_malloc and friends call gras_abort() on failure.
3564 As a conclusion, malloc_error is not a valid error anymore, and all
3565 functions for which it was the only gras_error_t return value are
3566 changed. They now return void, or there result directly.
3567 This simplify the API a lot.
3569 2004-09-29 Martin Quinson
3570 - Re-enable raw sockets.
3571 Created by gras_socket_{client,server}_ext;
3572 Used with gras_raw_{send,recv}
3575 It should allow to kill the last bits of gras first version soon.
3577 This is not completely satisfactory yet (duplicate code with
3578 chunk_{send,recv}; a bit out of the plugin mechanism), but it should
3581 - Simplify transport plugin (internal) interface by not passing any
3582 argument to _server and _client, but embedding them in the socket
3585 2004-09-28 Martin Quinson
3586 - Finish the port to AIX.
3587 autoconf was my problem (segfault within the malloc replacement
3588 function. No idea why)
3590 2004-09-16 Martin Quinson
3591 - Fix some size_t madness on 64bit architectures.
3593 2004-09-08 Martin Quinson
3594 - Reduce the number of system headers loaded, overload some more system
3595 calls (such as malloc to cast the result of the system one, and work
3597 - Fix and reintroduce the config support
3599 2004-09-07 Martin Quinson
3600 - Source code reorganization to allow Arnaud to surf all over there.
3601 - Allow to document the logging categories.
3602 - Remove all uppercase from logging categories and useless cleanup in names.
3604 2004-08-18 Martin Quinson
3605 Version 0.6.2 (protocol not changed; API changed)
3606 - Interface cleanup: gras_msgtype_by_name returns the type (instead of a
3607 gras_error_t), and NULL when not found. Functions expecting a msgtype
3608 as argument (msg_wait; msg_send) deal with NULL argument by providing a
3609 hopefully usefull message.
3610 - Portability to prehistoric sparcs again
3612 2004-08-17 Martin Quinson
3613 Version 0.6.1 (protocol not changed; ABI not changed)
3614 - prealloc some buffers to speed things up
3616 2004-08-11 Martin Quinson
3617 Version 0.6 (protocol not changed; ABI expended)
3618 - The parsing macro can deal with the references, provided that you add
3619 the relevant annotations (using GRAS_ANNOTE(size,field_name))
3621 2004-08-09 Martin Quinson
3622 Version 0.5 (protocol not changed; ABI changed)
3623 - Allow to off turn the cycle detection code in data exchange at
3624 compilation time. It should be at run time, but I'm short of time (and
3625 the config stuff is still broken). That way, we keep dict out of the
3626 critical path, which is good because the performance is poor:
3627 - search not dichotomial yet
3628 - dynar give no way to access their content and memcpy everytime
3629 - In composed data description (struct, ref and so on), stop foolness of
3630 keeping the subtype's ID, but store the type itself. This keeps sets out
3631 of the critical path, which is good since they rely on dynar and
3632 dictionnaries. The only loose of that is that we cannot detect the
3633 redeclaration of a structure/union with another content (but I'm not sure
3634 the code detected well this error before anyway). We still can detect
3635 the redefinition discrepancy for the other types.
3636 - Use a whole bunch of optimisation flags (plus -fno-strict-aliasing since
3637 it breaks the code because of type-punning used all over the place).
3638 This breaks on all non-gcc architectures (for now).
3640 All those changes (plus the buffer of last time) allow me to gain 2 order
3641 of magnitude on cruel tests consisting of 800000 array of integers on two
3642 level of a hierarchical structure (200 secondes -> 4 secondes)
3645 - the selector of reference must now return the type it points to, not
3646 the ID of this type.
3648 2004-08-06 Martin Quinson
3649 Version 0.4 (protocol changed; ABI not changed)
3650 - Allow to pass --gras-log argument to processes in simulation mode. Really.
3651 - New debugging level: trace (under debug) to see effect of GRAS_IN/OUT
3652 - Implement a buffer transport, and use it by default (it relies on tcp in
3653 real life and on sg in simulation).
3654 That's a bit hackish since I had a new field to the structure to store
3655 its data without interfering with the subtype ones. Inheritance
3656 is tricky in C. And that's a kind of reverse inheritance with one class
3657 derivating two classes. Or maybe a game with java interfaces. Anyway,
3658 that's damn hard in C (at least).
3659 Moreover, I got tired while trying to ensure plugin separation and
3660 genericity in SG mode. MSG wants me to do weird things, so let's go for
3661 cruel hacks (temporarily of course ;).
3662 See comment in transport_private.h:71
3663 - do not include all the _interface headers in private but in the files
3664 which really need them (to cut the compilation time when they are
3667 2004-07-26 Martin Quinson
3668 Version 0.3 (protocol not changed; ABI changed)
3669 - Major overhault of the datadesc interface to simplify it:
3670 - shorted the function names:
3671 s/gras_datadesc_declare_struct/gras_datadesc_struct/ and so on
3672 - add a trivial way to push/pop integers into the cbps without malloc.
3673 This allows to make really generic sub_type description, which simply
3674 pop their size of the stack.
3675 - add a function gras_datadesc_ref_pop_arr() which does what users want
3676 most of the time: Declare a dynamic array (which pops its size of the
3677 stack) and declare a reference to it. Poor name, but anyway.
3678 - kill the post-send callback, add a post-receive one
3680 2004-07-23 Martin Quinson
3681 Version 0.2 (protocol changed; ABI changed)
3682 - add some testing for cpbs in the test cases, and fix some more bugs.
3683 This invalidate again the little64 data file, since I cannot regenerate
3685 - remove an awfull optimization in the logging stuff, allowing me to:
3686 - understand it again
3687 - learn gcc how to check that the argument match the provided format
3688 - fix all errors revealed by gcc after that
3689 - internal keys of dict are not \0 terminated. Deal with it properly in
3690 loggings instead of segfaulting when the user want to see the logs :-/
3692 2004-07-22 Martin Quinson
3693 - Fix some stupid bug preventing cbps (callback postit) from working
3695 2004-07-21 Martin Quinson
3696 - Some documentation cleanups
3697 - remove the useless last argument of msgtype_declare
3698 - rename the Virtu functions to fit into the 'os' namespace
3699 - move headers src/include -> src/include/gras/ and stop fooling with
3700 gras -> . symbolic link
3701 - make distcheck is now successful
3703 2004-07-19 Martin Quinson
3705 - Build shared library also
3706 - Install html doc to the right location
3707 - stop removing maintainer files in make clean
3708 - build tests only on make check
3710 2004-07-13 Martin Quinson
3712 - No major issue in previous version => change versioning schema
3713 - Re-enable little64 convertion test now that Abdou kindly regenerated the
3714 corresponding dataset.
3716 2004-07-11 Martin Quinson
3718 - Get it working with any kind of structure (we can compute the padding
3719 bytes remotely for all the architectures I have access to)
3720 - Implement the structure parsing macro (still not quite robust/complete)
3721 - Improvement to the remote testing toysuite
3723 2004-07-10 Martin Quinson
3724 [autoconf mechanism]
3725 - get ride of a bunch of deprecated macros
3726 - actually run the test for two-compliment, not only compile it :-/
3727 - test whether the structures get packed (and bail out if yes. Damn.
3728 Alignment is a serious matter)
3729 - test whether the structures get compacted (but respecting the alignment
3730 constraints of each types)
3731 - test whether the array fields of structures can straddle alignment boundaries
3733 - Damnit, double are bigger than float (typo in creation of 'double' datadesc)
3734 (took me 2 hours to find that bug, looking at the wrong place)
3735 - Add gras_datadesc_declare_{union,struct}_close(). They must be used
3736 before sending/receiving and are used to compute the offsets of fields
3737 - Given that padding size depend even on compiler options, keep track of
3738 alignment and aligned_size only for the current architecture. Not a big
3739 deal since we send structure fields one after the other (seems
3741 - Add the datastructure used for IEEE paper by the PBIO guys to the test
3742 program, let it work on linux/gcc/little32. portability todo.
3744 2004-07-08 Martin Quinson
3745 - import and improve remote compilation support from FAST
3746 - make sure make check works on half a dozen of machines out there
3748 2004-07-07 Martin Quinson
3749 Let's say it's version 0.0.3 ;)
3750 - Implement conversions (yuhu!)
3751 - Let it work on solaris (beside conversion, of course)
3752 - Stupid me, using rand() to generate the conversion datatests in not wise.
3754 2004-07-06 Martin Quinson
3755 - Let make dist work, since I'm gonna need it to compile on remote hosts
3756 - Let Tests/datadesc_usage write the architecture on which the file was
3757 generated as first byte.
3758 - Add PowerPC (being also IRIX64), SPARC (also power4) and ALPHA
3759 architecture descriptions.
3760 - Add datadesc_usage.{i386,ppc,sparc} files being the result of execution
3761 on those architectures.
3762 - Optimization: send/recv array of scalar in one shoot
3764 2004-07-05 Martin Quinson
3765 - YEAH! GRAS/SG and GRAS/RL are both able to run the ping example !
3767 - Plug a whole bunch of memleaks
3768 - each process now have to call gras_{init,exit}. One day, their log
3769 settings will be separated
3770 - Continue the code factorisation between SG, RL and common in Transport.
3772 2004-07-04 Martin Quinson
3774 - Redistribution between SG and RL.
3775 We wanna have to accept in SG, so move accepted related parts of RL in
3776 the common part. (more precisely, the dynar of all known sockets is no
3777 more a static in transport.c, but part of the process_data)
3779 [gras_stub_generator]
3780 - Bug fix: Do call gras_process_init from gras_init (wasnt called in RL).
3782 2004-07-03 Martin Quinson
3783 - Create a new log channel tbx containing dict, set, log, dynar (to shut
3784 them all up in one shot)
3786 - Fix the ugly case of reference to dynamic array.
3787 - New (semi-public) function gras_datadesc_size to allow the messaging
3788 layer to malloc the needed space for the buffer.
3790 - gras_socket_close now expect the socket to close (and not its address to
3791 put NULL in it after it). This is because the socket passed to handlers
3792 is one of their argument (=> not writable).
3794 - propagate the interface cleanup from last week in datadesc, ie remove a
3795 superfluous level of indirection. User pass adress of variable
3796 containing data (both when sending and receiving), and not of a variable
3797 being a pointer to the data. Let's say that I like it better ;)
3798 The price for that is constructs like "int msg=*(int*)payload" in
3799 handlers, but it's a fine price, IMHO.
3801 - Let it work in RL (yuhu)
3803 2004-06-21 Martin Quinson
3805 - porting SG plugin and SG select to new standards (works almost).
3806 - plug memleaks and fix bugs around.
3809 - cleanup the prototype of data recv and force users to specify when they
3810 want to handle references to objects. Test case working even for cycles.
3811 - plug memleaks. Valgrind is perfectly ok with this.
3813 2004-06-12 Martin Quinson
3815 - cleanup the separation between plugin and main code in plugin creation
3817 2004-06-11 Martin Quinson
3819 - Reput hook for raw sockets, needed for BW experiments
3820 - kill a few lines of dead code
3821 [Data description] Interface cleanup
3822 - gras_datadesc_by_name returns the searched type or NULL.
3823 That way, no variable is needed to use a type desc once, which makes
3825 - gras_datadesc_declare_[struct|union]_append_name is removed. The last
3826 two parameters were strings (field name, type name), leading to
3828 [Dicos] Interface cleanup
3829 - gras_dico_retrieve -> gras_dico_get ; gras_dico_insert -> gras_dico_set
3830 This is consistant with the dynar API.
3832 2004-04-21 Martin Quinson
3834 - Porting to new standards.
3836 - interface cleanup.
3837 There is no bag anymore, no need to take extra provision to mask the
3838 pointers behind "ID".
3839 Better splitup of functions between files create/exchange/convert.
3840 This is still a bit artificial since convert and receive are so
3841 interleaved, but anyway.
3843 - add a queued message list to procdata (the ones not matching criteria
3845 - factorize some more code between SG and RL wrt procdata
3847 - use gras_exit in example to track memleaks
3848 - get rid of gs_example now that GS is properly integrated into gras
3849 - update run_test to integrate the latest tests (datadesc)
3851 - rename WARNINGn macros to WARNn since it prooved error-prone
3853 2004-04-19 Martin Quinson
3855 - register init/exit functions within gras module mechanism
3856 - send/receive function.
3857 Convertion is not implemented, but short-cutted if not needed.
3858 struct/array elements are sent one by one (instead of block-wise), but
3859 nobody really cares (yet). Get a prototype before optimizing.
3860 - tests (using a file socket) for DD send/receive on:
3861 - base types: int, float
3862 - array: fixed size, string (ie ref to dynamic string)
3863 - structure: homogeneous, heterogeneous
3864 - chained list, graph with cycle
3865 Believe it or not, valgrind is not too unhappy with the results. The
3866 cycle happily segfaults, but the others are ok. And I'm sick of pointers
3870 - Bugfix when using a filename explicitely (instead of '-')
3872 2004-04-09 Martin Quinson
3874 - factorize more code between RL and SG in socket creation
3875 - Complete the implementation and tests of:
3877 o file (only in RL, and mainly for debugging)
3879 I lost 3 days to design a portable address resolver, and then decided
3880 that the prototype mainly have to run on my box.
3881 Addressing portability too early may be like optimizing too early :-/
3883 - use gras_init in the Tests instead of the crappy parse_log_opt
3884 (the latter function is removed)
3885 [Conditional execution]
3886 - New functions: gras_if_RL/gras_if_SG (basic support for this)
3887 [Code reorganisation]
3888 - Get rid of libgrasutils.a since it makes more trouble than it solves.
3889 Build examples against the RL library, since there is no way to disable
3890 its creation for now.
3892 For information, the beginning of coding on GRAS was back in june
3893 2003. I guess that every line has been rewritten at least twice since