Add MPIService test file - Githubissues

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Add MPIService test file #535

Closed fwyzard closed 4 years ago

fwyzard commented 4 years ago

PR description:

Minor updates to the MPIService:

improve messages and error reporting;
add a python configuration to test the service.

PR validation:

$ cmsRun HeterogeneousCore/MPIServices/test/testMPIService.py
%MSG-i MPIService:  (NoModuleName) 16-Aug-2020 14:05:52 CEST pre-events
MPI_COMM_WORLD size: 1
MPI_COMM_WORLD rank: 0
MPI processor name:  fu-c2a02-37-02
The MPI library provides the MPI_THREAD_MULTIPLE multithreading support level
MPI successfully initialised
%MSG