X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/b0ccb7f468e82d573e86b3876c8f3badccdb5592..c5bc07d8e7416f9abba9d0b690cea0d4954ac054:/ChangeLog

diff --git a/ChangeLog b/ChangeLog
index feceb398f8..5206beefbb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,12 +1,66 @@
 ----------------------------------------------------------------------------
 
-SimGrid (3.24.1) NOT RELEASED YET (v3.25 expected December 22. 2029, 04:19 UTC)
+SimGrid (3.25.1) UNRELEASED (target: March 20 2020 or v3.26 on 3/26/20)
+
+Important user-visible changes:
+- 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 
+ should not cause too much performance hit. It can change some simulation 
+ timings if simulation was skipping a lot of small events (which was actually 
+ an issue of said simulation). The value can still be changed back using
+ --cfg=surf/precision:1e-5
+
+General:
+- LTO is now enabled for Intel/clang compilers.
+- LTO behavior on GCC can be parametrized 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).
+
+C interface:
+ - Many MSG tests were converted to the new S4U's interface in C, that
+   was extended for that.
+
+Fixed bugs (FG#.. -> framagit bugs; FG!.. -> framagit merge requests):
+ - FG#43: xbt::random needs some care
+ - FG#48: The Impossible Did Happen (yet again)
+ - FG!24: Documentation and fix for xbt/random
+ - GH#139: Allow pthread creation in SMPI
+
+----------------------------------------------------------------------------
+
+SimGrid (3.25) February 2. 2020 (aka 02 02 2020)
+
+The Palindrom Day Release.
+
+Important user-visible changes:
+- Improve the Python usability (stability and documentation).
+  - A nasty synchronization bug was ironed out, see also below.
+  - Python's doc was organized as a separate tree, now integrated with C++.
+  - C bindings of S4U were not part of the doc.
+  - The C++ doc was also improved as methods are now split by theme.
+- Further deprecate MSG: you now have to pass -Denable_msg=ON to cmake.
+  - This is mandatory to use the Java bindings.
+  - OFF by default; The plan is to completely remove MSG by 2020Q4 or 2021Q1.
+- SimDAG++: Automatic dependencies on S4U activities (experimental)
+  - Some features are already implemented but not all of them
+  - Cannot block an activity until it's scheduled on a resource
+  - No heterogeneous wait_any() that would mix Exec/Comm/Io activities.
+  - See examples/s4u/{io,exec,comm}-dependent for what's already there.
+
+
 
 General:
 - Upgrade documented Java dependency to Java 8 (earlier versions don't work).
 - Drop support for Viva/Triva (old visualization tools), hence removed
   TRACE_get_node_types() and TRACE_get_edge_types() functions.
 
+Python:
+- Require pybind11 version 2.4.
+- Greatly improve locking during context switches with Python.
+  - Declaring Python callbacks to this_actor::on_exit is now working.
+  - No more tests are failing currently, even on win32.
+
 S4U:
 - Actor: Merge signals on_migration_start/end into on_host_change
 - Actor: Rename migrate() into set_host()
@@ -52,6 +106,7 @@ SMPI:
   call, which should be called if SMPI is not being used through smpirun.
 
 Fixed bugs (FG#.. -> framagit bugs; FG!.. -> framagit merge requests):
+ - FG#9: Python bindings crashing
  - FG#39: Missing s4u::Comm::wait_any_for example
  - FG#42: Add support for ThreadSanitizer (TSan)
  - FG!19: Removing RngStream