X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/57b4c9b9a53ac467c4b41700cba7f0dce1d4c445..3a987e0a881dc1a0bb5a6203814f7960a5f4b07e:/ChangeLog diff --git a/ChangeLog b/ChangeLog index 6b426d9558..b4aa5e1383 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 @@ -16,37 +18,73 @@ Important user-visible changes: 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. -S4U: - - the on_exit() of each actor is also executed when the simulation deadlocks. +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 C functions were renamed to follow a common naming style + (sg_object_get_something and sg_object_set_something). As usual, the deprecated + names are kept until version 3.30. - Many MSG tests were converted to the new S4U's interface in C, that was extended for that. -Simix: - - Remove obsolete option --cfg=contexts/parallel-threshold. - Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests) (FG: issues on Framagit; GF: issues on GForge; GH: issues on GitHub) - 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#52: Zero-seconds timeout : "That's in the past already" + - FG#53: Crash while using ns-3 network model + - FG#54: How to suspend a comm? + - FG!22: Stochastic Profiles - 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#345: Error in the LMM while migrating a VM + - GH#346: [SMPI] error while loading shared libraries: libsimgrid.so + - GH#352: pip install / python setup.py install fail to find pybind11 - 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 ---------------------------------------------------------------------------- @@ -433,7 +471,7 @@ Documentation: (documenting all internals this way is overkill + doxygen scales badly) - New tutorial on S4U (highly inspired from the old MSG one, but with a git repository to fork as a starting point, and a docker image) - - Started but not finished a SMPI tutorial inspired from the JLPC'14 one. + - Started but not finished an SMPI tutorial inspired from the JLPC'14 one. - The Developper manual is still to be converted (not compiled until then) - Some parts are still missing in this conversion (such as the platform and deployment sections) while others were blindly converted @@ -861,7 +899,7 @@ SimGrid (3.16) Released June 22. 2017. * This is (mainly) a backward compatible change: v4 are valid v4.1 files - can be used as a synonym for the now deprecated - can be used as a synonym for the now deprecated - - an be used as a synonym for the now deprecated + - can be used as a synonym for the now deprecated - can be used as a synonym for the now deprecated - state_file and avail_file periodicity is now easier to express (check the documentation) the old behavior should still work. @@ -1797,7 +1835,7 @@ SimGrid (3.8) stable; urgency=low TRACE: * Two new tracing options for adding comments to trace file so you can track your experiments (see --help-tracing for details). - * New option to generate a impoverished trace file (--cfg=tracing/basic:1) + * New option to generate an impoverished trace file (--cfg=tracing/basic:1) * Adding the SimGrid version that generated the trace file as a comment. * Instrumenting other MSG functions (MSG_task_isend_with_matching and MSG_task_dsend) * Fix to avoid key clashes on Paje links @@ -3748,7 +3786,7 @@ SimGrid (2.90) unstable; urgency=low MSG but a few things really had to disappear. The main differences with the previous version are: 1) no more m_links_t and the corresponding functions. Platforms are - directly read from a XML description and cannot be hard-coded + directly read from an XML description and cannot be hard-coded anymore. The same format is used for application deployment description. The new format is described in the documentation. Have a look in tools/platform_generation. There is a tiny script