X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/ff3f57e561b45fec191d2f19d8904bde87a37855..b59417738c8cf11f1804269c65a4738bbf43c150:/ChangeLog diff --git a/ChangeLog b/ChangeLog index 9ea5af1a56..13e0736676 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,17 +1,173 @@ ---------------------------------------------------------------------------- -SimGrid (3.27.1) NOT RELEASED YET (v3.28 expected June 21. 2021, 03:32 UTC) +SimGrid (3.28.1) NOT RELEASED YET (v3.29 expected September 22. 2021, 19:21 UTC) + +New modeling features: + - Non-linear resource sharing for decay models: + - The total capacity may depend on the number of concurrent usages + - For that, resources can take a callback that computes the capacity + depending on the idle capacity and the number of concurrent usages + - Examples (both cpp and python): io-degradation, network-nonlinear, exec-cpu-nonlinear + + - Dynamic factors for CPU and disk: similarly to dynamic network factors, + allows the user to set a callback which can affect the progress of activities + (multiplicative factor applied when updating the amount of work remaining). + - Example: examples/cpp/exec-cpu-factors + +Python: + - Added support to programmatic platform creation in Python. + Example: examples/python/clusters-multicpu + +S4U: + - Disk and Host now have a set_sharing_policy() too, for non-linear sharing. + This can only be set through the API, not through XML files. + +SMPI: + - TI Tracing/Replay: + - Multiple fixes to ensure reproducibility of tracing + - scan/excan can now be replayed + - wait action now uses ranks and not pid, as the other ones. + - smpi/init and smpi/finalization-barrier are now valid for replays. + +Documentation: + * New section "Release Notes" documenting recent and current developments. + * New section "Modeling I/O: the realistic way" presenting how to properly model disks in SimGrid. + * Improvements in API Reference for C++ and Python interfaces. + +ns-3 model: + - Make wifi creation compatible with ns-3 version 3.34 too. + +Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests) + (FG: issues on Framagit; GF: issues on GForge; GH: issues on GitHub) + - FG#78: Multiple fixes for SMPI replay: + - TI tracing of allotallv/w was outputting wrong values + - MPI_LOGICAL in fortran is actually 32 bits wide, and not 8. + - FG#77: Search feature of doc is broken (update sphinx theme version) +---------------------------------------------------------------------------- + +SimGrid (3.28) July 14. 2021 + +The Victoriadagarna Release. + +New features: + - C++ platform interface: Users can now describe their platform directly in C++. + This provides greatly flexibility and performance improvement for complex + platforms. Main features: + - Fat-Tree/DragonFly/Torus composing: allows you to create clusters of + "zones", instead of single hosts. This feature enables the description + of clusters with complex hosts, composed of several CPUs, GPUs, etc. + - StarZone: new zone with a Star-like topology. The routes are defined + as a set of links used to communicate from node to everybody (node<->ALL). + - Split-Duplex links: auxiliary method to create split-duplex links in + the platform, easing its utilisation. It automatically creates both UP + and DOWN links (similarly as done in XML). + - Please refer to the documentation and the examples included: + e.g. examples/cpp/clusters-multicpu/ and examples/platforms/*.cpp. + - New plugin: Producer-Consumer with monitor. Just requires to include the + include/simgrid/plugins/ProducerConsumer.hpp header to be used. See the + associated example (examples/cpp/plugin-prodcons). S4U: + - New: s4u::Comm::wait_all_for() (like s4u::Comm::wait_all, but with a timeout), + s4u::Io::wait_any(), s4u::Io::wait_any_for(). + - Methods test_all/test_any/wait_all/wait_any in s4u now take their vector + parameter by reference, instead of a pointer. - Fixed a bug where Activity::wait_for() killed the activity on timeout. Explicitly cancel the activity to get back to previous behavior. + - New: Link::set_concurrency_limit() to limit the amount of concurrent flows. -LUA: - - Lua platform files are deprecated. Their support will be dropped after v3.31. +SMPI: + - The default SMPI compiler flags are no more taken from the environment. + They can be explicitly set through cmake parameters SMPI_C_FLAGS, + SMPI_CXX_FLAGS, or SMPI_Fortran_FLAGS. + - New options: + --cfg=smpi/finalization-barrier: which can be used to add + a barrier inside MPI_Finalize. This can help for some codes which cleanup + data attached to a process, but still used in other SMPI processes. + --cfg=smpi/errors-are-fatal: True by default, behaves like if MPI_ERRORS_RETURN + is active when set to false, to keep going after a small error + --cfg=smpi/pedantic: True by default. Do not report some harmless MPI errors + which may or may not be problematic in the end. + - Sampling: + - fix behaviour, as maximum iteration count could be ignored + - add SMPI_SAMPLE_LOCAL_TAG and SMPI_SAMPLE_GLOBAL_TAG macros, to allow user to + use sampling when the same kernel is called with a different set of parameters + which have an impact on the timing. + - realloc is now intercepted, to be coherent, as malloc/calloc/free were already. + It should now work with smpi/auto-shared-malloc-thresh. + - Improve error handling and reporting in multiple places + - Improve correctness checks on the MPI code.(MPI_Op and MPI_Datatype + validity checks, truncated messages are now an error, return errors + when explicitely deleted handles are reused, ...) + - RMA: multiple fixes and stability improvements. + - analysis (-analyze flag in smpirun): + - SMPI can now report buffer leaks as well as MPI handles leaks, + if code was compiled without SMPI_NO_OVERRIDE_MALLOC. + - if -trace-call-location is used when compiling, SMPI can report + origin of leaked handles/buffers + - group leaks by type/origin in output message if possible + - New implemented MPI calls: MPI_Comm_test_inter + +Models: + - Changed internal implementation of bandwidth factors in network models. + Models affected: CM02, LV08 (default), SMPI, IB. + Configuration affected: "network/bandwidth-factors" and "smpi/bw-factors". + Bandwidth factors are applied to communications to describe that users + cannot use 100% of the available bandwidth. For example, the default network model, + LV08, applies a factor of 0.97 to the bandwidth. In older versions, this + behavior was implemented by limiting the bandwidth available in the LMM + system for this flow. This may give the false impression that there is + bandwidth available for other flows due to its underutilization, especially + for the dynamic bandwidth factors used in SMPI models. + To avoid this, we have modified the implementation so that each flow uses the + maximum physical bandwidth according to the LMM system. + However, the actual throughput of the flow seen by the user is defined by + the physical bandwidth multiplied by the bandwidth factor. + This change impacts on the simulation results for all network models on + which we have bandwidth factors configured. + ***************************************** + *DO NOT MIX 3.28 RESULTS WITH OLDER ONES* + ***************************************** + This change may impact on the timing of your simulation results. + Take care when comparing simulations from different SimGrid's + versions. Sorry for the inconvenience. + - Dynamic network factors: users can configure a callback to define + the network factors dynamically. This API is available at + simgrid::kernel::resource::NetworkModelIntf. + - Users have access to complete information about the current communication + to decide which factor to apply. This includes: message size, source and + destination hosts, links and zones traversed. + - Dynamic factors for both latency and bandwidth. + - For more details, see the example in (examples/cpp/network-factors). + - Plugin host_energy: the "watt_off" and "watt_per_state" host properties, + deprecated since version 3.24, are no longer supported. Instead, use + "wattage_off" and "wattage_per_state". XBT: - xbt_assert is not disabled anymore, even when built with enable_debug=off. +Documentation: + - New tutorial: Model-checking and formal assessment + - New sections: "Demystifying the routing" and "C++ platforms" + - Update and improve the part on visualization in MPI and Algo tutorials. + - Improve the section on routing: how to define it, how it's used internally + - Fix many issues, broken links and missing references in doxygen and Sphinx + +LUA: + - Lua platform files are deprecated. Their support will be dropped after v3.31. + +Simix: + - Legacy functions deprecated in this release: SIMIX_get_clock(), SIMIX_run(). + +Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests) + (FG: issues on Framagit; GF: issues on GForge; GH: issues on GitHub) + - FG#47: Complete and fix tests from teshuite/s4u/activity-lifecycle + - FG#64: Configuring smpi/IB-penalty-factors + - FG#67: Running computation concurrently with MPI_Iallreduce + - FG#69: Tutorial misleading users of pre-v3.26 versions of SimGrid + - FG#71: Segmentation fault on invalid gw_src/gw_dst + - GH#322: Issue when an actor kills his host vm + ---------------------------------------------------------------------------- SimGrid (3.27) March 29. 2021