+ behavior tracing is no longer limited to MSG
+ - TIT (Time Independent Traces): We finally support tags. Unfortunately,
+ this means that traces now need to be updated or re-obtained; both Irecv
+ and Isend lines in your traces have now in total 5 mandatory fields:
+ <rankid> <command> <to/from rankid> <tag> <size>
+ To update your traces, it suffices to add a 0 for the tag here.
+ - TIT now also supports waiting for a distinct request via MPI_Wait.
+ Wait/Test now wait for a specific request, not just the last one that was
+ issued. This unfortunately means another update, because we need to
+ identify which request you want to wait for. We do this via the
+ triplet (sender, receiver, tag), which needs to be added:
+ <rankid> <command> <sender> <receiver> <tag>
+ - Actions are now in lower case (e.g., "allReduce" becomes "allreduce").
+ New script simgrid_convert_TI_traces.py: upgrade your TI traces.
+
+MSG
+ - The deprecation of MSG is ongoing (but this should not impact you).
+ Many MSG functions are now simple wrappers on the C API of S4U. If
+ you wish to convert your code to S4U, find the S4U counterparts of
+ your MSG calls in src/msg/msg_legacy.cpp.
+ - MSG can still be used, but won't evolve anymore.
+
+Plugins:
+ - Allow to run the Link energy plugin from the command line with
+ --cfg=plugin:link_energy
+ - Rename Energy plugin into host_energy
+ - Rename Load plugin into host_load
+
+simix:
+ - Add parameter --cfg=simix/breakpoint to raise a SIGTRAP at given time.
+ - kill simix::onDeadlock() that was somewhat dupplicating s4u::on_deadlock()
+ - Improve performance when handling timeouts of simix synchros.
+
+XBT:
+ - Config: the C API is now deprecated (will be removed in 3.23), and
+ the C++ API has been slightly improved.
+
+Other:
+ - Fix several build issues on OSX.
+ - Move simgrid_config.h to simgrid/config.h (old header still working)
+
+Fixed bugs:
+ - #143: Setting a breakpoint at a given time
+ - #150: Inconsistent event names in SMPI replay
+ - #258: daemonized actors hang after all non-daemonized actors have completed
+ - #267: Linker error on unit_tmgr
+ - #269: SMPI: tracing of MPI_Wait/all/any broken
+ - SMPI: Fix various crashes with combined use of MPI_PROC_NULL and MPI_IGNORE_STATUS
+