Merge branch 'master' into 'master'

[simgrid.git] / ChangeLog

diff --git a/ChangeLog b/ChangeLog
index 64b9124..e39ed89 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,6 +7,23 @@ User-visible changes:
    - 'verbose-exit' is now 'debug/verbose-exit'
    - 'simix/breakpoint' is now 'debug/breakpoint'
    - 'clean-atexit' is now 'debug/clean-atexit'
    - 'verbose-exit' is now 'debug/verbose-exit'
    - 'simix/breakpoint' is now 'debug/breakpoint'
    - 'clean-atexit' is now 'debug/clean-atexit'

+ - Removed all that was related to the "Storage" type in all APIs and bindings.
+   "Disks" have been introduced more than a year ago to replace them for the better.
+   It's time to finish this replacement.
+ - Model iteration order may change simulations.
+    *****************************************
+    *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.
+ - 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.
+ - Network model ns-3 now requires version ns-3.28 or higher.

 
 S4U:
  - Define new template functions Mailbox::get_unique(), returning a std::unique_ptr.
 
 S4U:
  - Define new template functions Mailbox::get_unique(), returning a std::unique_ptr.


@@ -15,9 +32,68 @@ S4U:
    or Mailbox::get_async<void>() if you really want to play with void*.
  - Unify the interface of Activity::on_{start/activity}
  - New function: Comm::get_dst_data()
    or Mailbox::get_async<void>() if you really want to play with void*.
  - Unify the interface of Activity::on_{start/activity}
  - New function: Comm::get_dst_data()

+ - New function: Comm::set_payload_size() to set the amount of bytes to simulate.

  - New functions: Comm::sendto_{init,async} to initiate a communication
    on between two (possibly remote) hosts.
 
  - New functions: Comm::sendto_{init,async} to initiate a communication
    on between two (possibly remote) hosts.
 

+XBT:
+ - Drop simgrid::xbt::demangle(). Please use boost::core::demangle() instead.
+ - Drop xbt_dynar_cursor_rm(), xbt_dynar_search_or_negative(),
+   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
+ - Support for MPI C++ datatypes (MPI_CXX_BOOL, MPI_CXX_FLOAT_COMPLEX,
+   MPI_CXX_DOUBLE_COMPLEX, MPI_CXX_LONG_DOUBLE_COMPLEX)
+ - 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.
+ - Constness requirement has been lowered for parameter argv of sg_actor_start()
+   and sg_actor_create() It's now (char* const*). The previous version is still
+   available as sg_actor_start_() and sg_actor_create_().
+
+Documentation:
+ - New section: Configuring the logs from the command line.
+ - New section: Programming API of logs.
+
+Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
+ (FG: issues on Framagit; GF: issues on GForge; GH: issues on GitHub)
+ - FG#37: Parallel tasks are limited to 1 core per host
+ - FG#62: Running "smpirun -replay" on large networks
+ - FG!46: Fix a few potential memory leaks in SMPI colls
+ - GH#343: Wrong consumed energy when an exec timeouts
+

 ----------------------------------------------------------------------------
 
 SimGrid (3.26) December 15. 2020
 ----------------------------------------------------------------------------
 
 SimGrid (3.26) December 15. 2020


@@ -184,7 +260,7 @@ SMPI:
    allocations' size above which they are considered "shared" by default (as if
    they were performed through SMPI_SHARED_MALLOC macros).
    Default = 0 = disabled feature.
    allocations' size above which they are considered "shared" by default (as if
    they were performed through SMPI_SHARED_MALLOC macros).
    Default = 0 = disabled feature.

-   Note : malloc, calloc and free are now overriden by smpicc/cxx by default.
+   Note : malloc, calloc and free are now overridden by smpicc/cxx by default.

    This can cause some troubles if codes are already overriding these. If this
    is the case, defining SMPI_NO_OVERRIDE_MALLOC in the compilation flags can
    help, but will make this feature unusable.
    This can cause some troubles if codes are already overriding these. If this
    is the case, defining SMPI_NO_OVERRIDE_MALLOC in the compilation flags can
    help, but will make this feature unusable.