X-Git-Url: http://bilbo.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/1363ce9624f4327f3ad5c934b15736a776637dfd..HEAD:/ChangeLog

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-SimGrid (3.34.1) not released (Target: fall 2023)
+SimGrid (3.35.1) not released (target: Feb 24)
+
+
+----------------------------------------------------------------------------
+
+SimGrid (3.35) November 23. 2023
+
+The "Thanks Giving up stateful model-checking" release. Stateless model checking remains.
+
+S4U:
+ - New class ActivitySet to ease wait_any()/test_any()/wait_all()
+   - Deprecate {Comm,Io,Exec}::{wait_any,wait_all,test_any} and friends
+ - Simplify a bit the declaration of multi-zoned platforms from C++
+   - New function NetZone::add_route(host1, host2, links) when you don't need gateways
+   - Also add a variant with s4u::Link, when you don't want to specify the directions
+     on symmetric routes.
+   - Zone's gateways can now be controlled directly.
+   - Add NetZone::add_route(zone1, zone2, links) specifying the route between zones
+ - Introduce a Mailbox::get_async() with no payload parameter. You can use the new
+   Comm::get_payload() once the communication is over to retrieve the payload.
+ - Implement recursive mutexes. Simply pass true to the constructor to get one.
+ - Simplify the expression of horizontal scaling of Tasks.
+   - Each Task now consists of a dispatcher, a collector and one or more instances.
+   - The parallelism degree of each of these can be set.
+   - Several examples have been added or modified accordingly.
+   - Update s4u::create_DAG_from_json() to support wfformat 1.4.
+ - Introduce a new MessageQueue abstraction and associated Mess simulated object.
+   The behavior of a MessageQueue is similar to that of a Mailbox, but intended for
+   control messages that do not incur any simulated cost. Information is automagically
+   transported over thin air between producer and consumer. See examples/cpp/mess-wait
+ - New function: Mutex::get_owner()
+
+S4U plugins:
+ - New: Add a JBOD (just a bunch of disks) concept. It's a sort of host with many disks.
+ - Revamp the battery plugin: rewrite completely the API, for a better usability.
+   The examples were updated accordingly.
+   The battery can now act as a simple connector (see battery-connector example).
+ - Revamp of the photovoltaic plugin: now called SolarPanel and complete rewrite of the API
+ - Add chiller plugin: enable the management of chillers consuming electrical energy
+   to compensate heat generated by hosts.
+ - Add a battery-chiller-solar example combining several plugins to evaluate the amount
+   of brown energy (from the electrical grid) and green energy (from the solar panel)
+   during a given computation.
+
+SMPI:
+ - New SMPI_app_instance_join(): wait for the completion of a started MPI instance
+ - MPI_UNIVERSE_SIZE now initialized to the total amount of hosts in the platform
+ - Memory usage due to SMPI for non-MPI actors greatly reduced.
+ - New implemented calls: MPI_Isendrecv, MPI_Isendrecv_replace
+
+sthread:
+ - Allow to use on valgrind-observed or gdb-observed processes.
+ - Install sthread on user's disk.
+ - Implement recursive pthreads.
+ - Implement pthread_barrier and pthread_cond (but conditional are not supported by the MC yet).
+ - Add some McMini codes to test sthread further (controlled with enable_testsuite_McMini).
+
+Model checking:
+ - Remove stateful model-checking. This was not used, not really working, and very hard to fix.
+   Liveness properties cannot be verified anymore.
+ - More informative backtraces on assertion failure.
+ - Fix dependency bugs for mutex and other transitions
+ - Fix some reversible_race definitions, and also the rest of ODPOR.
+
+Python:
+ - Make the host_load plugin available from Python. See examples/python/plugin-host-load
+ - Mailbox::get_async() does not return a pair anymore. Use comm.get_payload() instead.
+ - Comm::waitall/waitany/testany() are gone. Please use ActivitySet() instead.
+ - Comm::waitallfor() is gone too. Its semantic was unclear on timeout anyway.
+ - Io::waitany() and waitanyfor() are gone. Please use ActivitySet() instead.
+ - Do not export the values of enums. So you need to write e.g. SharingPolicy.LINEAR
+   while it should have been possible to write LINEAR alone before. This is the advised
+   behavior for modern C++ code.
+
+C API:
+ - Introduce sg_activity_set_t and deprecate wait_all/wait_any/test_any for
+   Exec, Io and Comm.
+
+Kernel:
+ - optimize an internal data structure (replace boost::circular_buffer_space_optimized by
+   std::deque to store pending and unmatched Comms in Mailboxes). It is actually a revert
+   to what was used a few years back. The boost structure had a lower memory footprint than
+   deques, but it appeared that their "space_optimized" character was generating a huge lot
+   of refcount changes on the stored Comms.
+
+General:
+ - Fix errors with ns-3 v3.36+
+ - Many other small bug fixes, in particular in MC and sthread.
 
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