From 494409fcfee344c25a71df0db04721c8efde2e32 Mon Sep 17 00:00:00 2001 From: Augustin Degomme Date: Thu, 25 Mar 2021 18:06:02 +0100 Subject: [PATCH] Changelog update for SMPI --- ChangeLog | 47 ++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 42 insertions(+), 5 deletions(-) diff --git a/ChangeLog b/ChangeLog index 64b30db973..6e3e99ab93 100644 --- a/ChangeLog +++ b/ChangeLog @@ -14,11 +14,15 @@ User-visible changes: ***************************************** *DO NOT MIX 3.27 RESULTS WITH OLDER ONES* ***************************************** - The order in which the different models (CPU, network, disk, etc) are - solved internally has changed in this version. Although rare (no current - test raises the problem), this change can result in slightest different simulations - results. Take care when comparing simulations from different SimGrid's - versions. Sorry for the inconvenience. + The order in which the different models (CPU, network, disk, etc) are + solved internally has changed in this version. Although rare (no current + test raises the problem), this change can result in slightest different simulations + results. Take care when comparing simulations from different SimGrid's + versions. Sorry for the inconvenience. + - SMPI API break from previous version: MPI global handles (predefined datatypes, + ops, COMM_WORLD) are now defined differently, and can be used in initializers, + avoiding "initializer element is not constant" errors with some codes. Please be + careful to recompile your MPI codes if switching to this new SimGrid version. S4U: - Define new template functions Mailbox::get_unique(), returning a std::unique_ptr. @@ -37,6 +41,39 @@ XBT: xbt_str_split_quoted(), xbt_str_split_quoted_in_place(). - Deprecate xbt_dynar_to_array(). +SMPI: + - Handle leak checking (experimental): SMPI will now display a message if MPI + handles are still present at the end of a simulation. This may be nothing, + but if the number is high it could be a problem. To display more information + about the type of leaked handle, option --cfg=smpi/list-leaks:n. will display + the n first leaked pointers and their types. Known issue: MPI_Cancel usage + may trigger handle leaks in SMPI. + Using smpirun with -wrapper "valgrind --leak-check=full --track-origins=yes" + can provide more information to help locate precisely the leaks. + - Memory allocations analysis (experimental): MPI codes using malloc/calloc to + allocate memory, and not compiled with SMPI_NO_OVERRIDE_MALLOC, can use + smpi/display-analysis option to show at the end of execution the amount of + memory allocated through these calls, and locate the most expensive one. + This helps finding the targets for manual memory sharing, or the threshold + to use for smpi/auto-shared-malloc-thresh option. + - New implemented MPI calls: MPI_File_set_size, MPI_Aint_add, MPI_Aint_diff, + MPI_Type_get_extent_x, MPI_Type_get_true_extent_x, MPI_Status_set_elements_x + - Misc fixes : + - better handling of MPI_PROC_NULL + - MPI_Group_incl was broken in some cases + - PAPI tracing was fixed + - MPI_Errhandlers are properly handled for MPI_COMM_WORLD + - SMPI will now fail properly when receive size < sent size, instead of + just setting MPI_ERR_TRUNCATE and keep going. + - Proxy Apps ( https://framagit.org/simgrid/SMPI-proxy-apps ): + - Remove useless build patches and split build/run patches on the page + - Build in parallel when possible + - Test on yum-based systems + - New nightly tested Proxy-apps: + - OpenMPI mpi-test-suite + - Coral MCB, LSMS, Qbox + - ECP/Mantevo Cloverleaf3D + C binding and interface: - Rename (lowercase) functions sg_actor_get_PID, sg_actor_get_PPID, sg_actor_by_PID. -- 2.20.1