PhotonXGBoostEstimator : set XGBoost to use one thread to avoid spawning hundreds of OpenMP threads

[mmusich]

PR description:

Title says it all, see #44923 for details

PR validation:

Run the script #44923 (comment) and verified with gdb and info threads that the amount of threads is limited, see also #44923 (comment) and #44923 (comment)

If this PR is a backport please specify the original PR and why you need to backport that PR. If this PR will be backported please specify to which release cycle the backport is meant for:

Not a backport to be backported to 14.0.X for data-taking purposes

[cmsbuild]

cms-bot internal usage

[mmusich]

type egamma, bug-fix

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-45042/40346

• This PR adds an extra 16KB to repository

[cmsbuild]

A new Pull Request was created by @mmusich for master.

It involves the following packages:

• RecoEgamma/PhotonIdentification (reconstruction)

@cmsbuild, @mandrenguyen, @jfernan2 can you please review it and eventually sign? Thanks.
@afiqaize, @varuns23, @missirol, @sameasy, @Prasant1993, @a-kapoor, @sobhatta, @Sam-Harper, @valsdav, @lgray, @jainshilpi, @ram1123 this is something you requested to watch as well.
@rappoccio, @antoniovilela, @sextonkennedy you are the release manager for this.

cms-bot commands are listed here

[mmusich]

enable gpu

[mmusich]

@cmsbuild, please test

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-6a46aa/39522/summary.html
COMMIT: 23a0326
CMSSW: CMSSW_14_1_X_2024-05-24-1100/el8_amd64_gcc12
Additional Tests: GPU
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/45042/39522/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially removed 5 lines from the logs
• Reco comparison results: 6 differences found in the comparisons
• DQMHistoTests: Total files compared: 48
• DQMHistoTests: Total histograms compared: 3338862
• DQMHistoTests: Total failures: 3
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3338839
• DQMHistoTests: Total skipped: 20
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 47 files compared)
• Checked 202 log files, 165 edm output root files, 48 DQM output files
• TriggerResults: no differences found

GPU Comparison Summary

Summary:

• No significant changes to the logs found
• Reco comparison results: 0 differences found in the comparisons
• DQMHistoTests: Total files compared: 3
• DQMHistoTests: Total histograms compared: 39740
• DQMHistoTests: Total failures: 22
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 39718
• DQMHistoTests: Total skipped: 0
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 2 files compared)
• Checked 8 log files, 10 edm output root files, 3 DQM output files
• TriggerResults: no differences found

[mandrenguyen]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next master IBs (tests are also fine). This pull request will now be reviewed by the release team before it's merged. @antoniovilela, @sextonkennedy, @rappoccio (and backports should be raised in the release meeting by the corresponding L2)

[francescobrivio]

@cms-sw/orp-l2 @cms-sw/core-l2 could we merge this asap so that we can have an IB with this PR?
The backport #45043 is needed for a semi-urgent patch for HLT.

Cheers,
Francesco as ORM

[VinInn]

to be precise in the worse case on a HLT Milan machine the total number of concurrent threads spawn by openMP will be 65280
(255*256)

[antoniovilela]

+1