make test pass. The finalization barrier is needed in this case, which is suboptimal.

[simgrid.git] / ChangeLog

diff --git a/ChangeLog b/ChangeLog
index 7c1deb5..13e0736 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,28 +1,112 @@
 ----------------------------------------------------------------------------
 
 ----------------------------------------------------------------------------
 

-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:
 
 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 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.
  - 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.

 
 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.
 
 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 option: --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.
-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().
+ - 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:
  - Changed internal implementation of bandwidth factors in network models.


@@ -47,12 +131,33 @@ Models:
    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.
    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
 
 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)
 
 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
  (FG: issues on Framagit; GF: issues on GForge; GH: issues on GitHub)


@@ -60,6 +165,7 @@ Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
  - 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#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
 
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  - GH#322: Issue when an actor kills his host vm
 
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