TRACE
- Change --cfg=tracing/msg/vm to --cfg=tracing/vm as virtual machine
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. A lot of functions are now simple
- wrappers on the C API of S4U. All these wrappers (and their S4U counterparts
- can be found in src/msg/msg_legacy.cpp).
+ - 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.
S4U:
- Introduced new function simgrid::s4u::Host::get_actor_count. This function
SMPI:
- SMPI is now tested with ~45 proxy apps from various sources, with none or
- only minor patching needed: check github.com/simgrid/SMPI-proxy-apps
+ only minor patching needed: check https://github.com/simgrid/SMPI-proxy-apps
- Replay: The replay file has been re-written in C++.
- Replay: Tags used for messages sent via MPI_Send / MPI_Recv are now
supported. They are stored in the trace and used when replayed.
