[14.0.X] PhotonXGBoostEstimator : set XGBoost to use one thread to avoid spawning hundreds of OpenMP threads

[mmusich]

backport of #45042

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:

Backport of #45042 in the 2024 production cycle for data-taking purposes.

[mmusich]

type egamma, bug-fix

[cmsbuild]

A new Pull Request was created by @mmusich for CMSSW_14_0_X.

It involves the following packages:

• RecoEgamma/PhotonIdentification (reconstruction)

@jfernan2, @mandrenguyen, @cmsbuild can you please review it and eventually sign? Thanks.
@sameasy, @jainshilpi, @Prasant1993, @ram1123, @missirol, @afiqaize, @a-kapoor, @varuns23, @Sam-Harper, @lgray, @sobhatta, @valsdav 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

• Backported from PhotonXGBoostEstimator : set XGBoost to use one thread to avoid spawning hundreds of OpenMP threads #45042

[cmsbuild]

cms-bot internal usage

[mmusich]

@cmsbuild, please test

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-19306a/39523/summary.html
COMMIT: f537906
CMSSW: CMSSW_14_0_X_2024-05-24-2300/el8_amd64_gcc12
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/45043/39523/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially removed 8 lines from the logs
• Reco comparison results: 53 differences found in the comparisons
• DQMHistoTests: Total files compared: 48
• DQMHistoTests: Total histograms compared: 3333953
• DQMHistoTests: Total failures: 1199
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3332734
• 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

[mandrenguyen]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_14_0_X IBs (tests are also fine) and once validation in the development release cycle CMSSW_14_1_X is complete. This pull request will now be reviewed by the release team before it's merged. @rappoccio, @sextonkennedy, @antoniovilela (and backports should be raised in the release meeting by the corresponding L2)

[francescobrivio]

urgent

• needed for a patch at HLT for data-taking

[francescobrivio]

type hlt-integration

[antoniovilela]

+1