Updates to the MPIService

[fwyzard]

PR description:

Various updates to the MPIService:

• split MPIService into header, implementation and plugin;
• add comments about the implementation status of MPI_THREAD_MULTIPLE;
• add helper function to make sure the MPIService is available;
• add an option to set the pmix_server_uri OpenMPI parameter.

PR validation:

Integration tests pass:

===== Test "TestHeterogeneousCoreMPIServices" ====
%MSG-i MPIService:  (NoModuleName) 18-Apr-2022 16:11:04 CEST pre-events
The MPI library provides the MPI_THREAD_MULTIPLE multithreading support level
MPI_COMM_WORLD size: 1
MPI_COMM_WORLD rank: 0
MPI processor name:  patatrack03

MPI successfully initialised
%MSG

=============================================

[fwyzard]

please test

[fwyzard]

+heterogeneous

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-37605/29377

• This PR adds an extra 12KB to repository

• There are other open Pull requests which might conflict with changes you have proposed:

  • File HeterogeneousCore/MPIServices/BuildFile.xml modified in PR(s): Extend CMSSW to a distributed application over MPI #32632
  • File HeterogeneousCore/MPIServices/interface/MPIService.h modified in PR(s): Extend CMSSW to a distributed application over MPI #32632
  • File HeterogeneousCore/MPIServices/plugins/BuildFile.xml modified in PR(s): Extend CMSSW to a distributed application over MPI #32632
  • File HeterogeneousCore/MPIServices/plugins/MPIService.cc modified in PR(s): Extend CMSSW to a distributed application over MPI #32632
  • File HeterogeneousCore/MPIServices/src/MPIService.cc modified in PR(s): Extend CMSSW to a distributed application over MPI #32632

[cmsbuild]

A new Pull Request was created by @fwyzard (Andrea Bocci) for master.

It involves the following packages:

• HeterogeneousCore/MPIServices (heterogeneous)

can you please review it and eventually sign? Thanks.
@makortel, @rovere this is something you requested to watch as well.
@perrotta, @dpiparo, @qliphy you are the release manager for this.

cms-bot commands are listed here

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-33708a/23985/summary.html
COMMIT: fd71e01
CMSSW: CMSSW_12_4_X_2022-04-18-1100/slc7_amd64_gcc10
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmssw/37605/23985/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• No significant changes to the logs found
• Reco comparison results: 4 differences found in the comparisons
• DQMHistoTests: Total files compared: 48
• DQMHistoTests: Total histograms compared: 3589937
• DQMHistoTests: Total failures: 7
• DQMHistoTests: Total nulls: 1
• DQMHistoTests: Total successes: 3589907
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: -0.004 KiB( 47 files compared)
• DQMHistoSizes: changed ( 312.0 ): -0.004 KiB MessageLogger/Warnings
• Checked 200 log files, 45 edm output root files, 48 DQM output files
• TriggerResults: no differences found

[qliphy]

+1