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sstsimulator / sst-macro

SST Macro Element Library
http://sst-simulator.org/
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MPI parallel simulations are incorrect (standalone) #632

Closed jpkenny closed 2 years ago

jpkenny commented 2 years ago

1 - Detailed description of problem or enhancement

Parallel simulations for standalone builds have different behavior and results depending on the number of ranks. This is incorrect behavior.

2 - Describe how to reproduce

Run the following with varying NRANK MPI_LAUNCHER='mpirun -n NRANK' make check

3 - What Operating system(s) and versions

Verified on CentOS 7 and Mac OSX 10.15 Catalina

4 - What version of external libraries (Boost, MPI)

Various versions of OpenMPI v4.x

5 - Provide sha1 of all relevant sst repositories (sst-core, sst-elements, etc)

Appears to be the case for sst-macro since approximately 8.0 (2018-MAY-31)

jpkenny commented 2 years ago

Won't fix.

Parallel simulation will only be supported using sst-core moving forward.

jpkenny commented 2 years ago

Resolved (won't fix, disabled and documented) by PR #648