----------------------------------------------------------------------------
-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
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
+ - FG!20: A module for RNG calls
+ - FG!21: Choice between ad-hoc and standard distributions implementations
+ - FG!23: Master
+ - FG!25: Fix link in Mutex doc
+ - FG!26: Fix links in SMPI interface doc
- GH#31: [MC] please provide an option to make MPI_Send asynchronous
- GH#305: Unscheduled tasks are still excuted
- GH#313: smpirun: manual outdated w.r.t. --help
- GH#321: [S4U] Get task remaining work ratio
- GH#323: Crash when an actor turn off his physical host
- GH#335: Missing links on dragonfly example svg
- - FG!19: Removing RngStream
- https://lists.gforge.inria.fr/pipermail/simgrid-user/2019-November/004653.html:
MPI_Cart_sub was not working properly. Kudos to Jonathan Borne for the report.
