X-Git-Url: http://bilbo.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/47cc4e3b45fa686f4f8ab76cb6a2c4e23b111eca..d6a9ae11bd2ff9b0bf30bf84cbedfe0438a5051e:/ChangeLog

diff --git a/ChangeLog b/ChangeLog
index 4823482603..f189cb2d24 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -3,6 +3,8 @@
 SimGrid (3.25.1) UNRELEASED (target: March 20 2020 or v3.26 on 3/26/20)
 
 Important user-visible changes:
+ - SimGrid now requires a compiler with C++14 support.
+   Sibling projects should upgrade their FindSimgrid.cmake
  - Surf precision default value is now 1e-9, instead of 1e-5. This was changed as
    several users had difficult to understand issues when using high bandwidth or
    small latency events. The new value was already the default for SMPI and
@@ -11,19 +13,47 @@ Important user-visible changes:
    an issue of said simulation). The value can still be changed back using
    --cfg=surf/precision:1e-5.
  - On some network models (L07, CM02, LV08), an implicit loopback link is created
-   for local communication. Default bandwidth was 500MMps and latency was 15µs,
+   for local communication. Default bandwidth was 500MBps and latency was 15µs,
    which was rather bad. Default values have been changed to 10GBps and 0 latency.
    Options network/loopback-lat and network/loopback-bw have been added to adapt
    these values if needed. Network and routing models already providing separate
    loopbacks (clusters and such) are not impacted by this change.
+ - SMPI now adds 16 bytes of header to each message sent, in order to simulate
+   metadata that are added to each MPI message by MPI libraries (tag,
+   src/dest, and communicator information). This may change simulation times
+   for very small message sizes, but should be more realistic.
+
+New features:
+ - New routing 'WiFi' that makes it easier to specify a wifi network zone.
+ - New plugins: wifi_energy and link_load. See the associated examples.
+ - New examples: wifi networks, and communication suspend.
 
 General:
  - LTO is now enabled for Intel/clang compilers.
  - LTO behavior on GCC can be parameterized using LTO_EXTRA_FLAG in cmake.
    Setting it to "auto" will use all available cores, while setting it to n will
    use n cores to speedup link step (usage: cmake -DLTO_EXTRA_FLAG=4).
+ - Remove obsolete option --cfg=contexts/parallel-threshold.
+ - Further improve the documentation.
+
+S4U:
+ - the on_exit() of each actor is also executed when the simulation deadlocks.
+ - New functions: s4u::Activity:: suspend(), resume() and is_suspended()
+   An example is provided for s4u::Comm but it should work with Exec and Io.
 
-C interface:
+SMPI:
+ - Update proxy apps coverage of new ECP apps: 60+ apps now tested nightly on
+   https://framagit.org/simgrid/SMPI-proxy-apps
+ - MPI/IO: supports names starting with "./"
+ - Fortran: many MPI/IO bindings, support for MPI_UB/LB, C MPI_INT/FLOAT/DOUBLE
+   datatypes.
+ - smpicc/cxx/ff/f90 now will actually perform definition checks at link time. When
+   building shared libraries, this may cause issues, so environment variable
+   SMPI_NO_UNDEFINED_CHECK can be added to disable this.
+
+C binding and interface:
+ - The return type of the sg_actor_on_exit() callbacks is now 'void'
+   (int value was previously ignored)
  - Many MSG tests were converted to the new S4U's interface in C, that
    was extended for that.
 
@@ -32,11 +62,21 @@ Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
  - FG#41: Add sg_actor_create C interface
  - FG#43: xbt::random needs some care
  - FG#48: The Impossible Did Happen (yet again)
+ - FG#50: Suspending an actor executed at the current timestamp fails
+ - FG#54: How to suspend a comm?
  - FG!24: Documentation and fix for xbt/random
+ - FG!35: Add a modeling hint for parallel links in doc
+ - FG!36: [xbt/random] Read/Write the state of the RNG
+ - FG!42: Link cumulated load plugin
+ - FG!44: Test condition variable wait_until+notify_all
  - GF#18137: Allow different stack sizes?
  - GH#128: Parallelization of simulation with --cfg=contexts/nthreads
  - GH#139: Allow pthread creation in SMPI
  - GH#336: Packet-level simulation using SMPI?
+ - GH#346: [SMPI] error while loading shared libraries: libsimgrid.so
+ - GH!337: Fix link_energy plugin for wifi platforms
+ - GH!339: Add Mailbox set_receiver method to python binding
+ - GH!344: Cast hugepages macros parameters to int64
 
 ----------------------------------------------------------------------------
 
@@ -559,7 +599,7 @@ Plugins:
  - Rename Energy plugin into host_energy
  - Rename Load plugin into host_load
 
-simix:
+Simix:
  - Add parameter --cfg=simix/breakpoint to raise a SIGTRAP at given time.
  - kill simix::onDeadlock() that was somewhat dupplicating s4u::on_deadlock()
  - Improve performance when handling timeouts of simix synchros.