Exclude PluginManager cache from MaxMemoryPreload monitoring

[makortel]

PR description:

As described in #46359, developer areas with many checked out packages result in larger "max memory" reported by MaxMemoryPreload AllocMonitor. This additional memory is used by PluginManager cache.

As a simple (albeit a bit hacky) workaround, this PR adds hooks to the MaxMemoryPreload that allow its data collection to be paused, and uses those hooks in PluginManager to paused the data collection during the cache file reading.

Resolves #46359
Resolves cms-sw/framework-team#1074

PR validation:

Tested the impact with two developer areas of CMSSW_14_2_0_pre2: one with many packages checked out, and one with only two packages (FWCore/PluginManager and PerfTools/MaxMemoryPreload). The remaining difference in "max memory" was about 1 MB, or 0.05 %.

[cmsbuild]

cms-bot internal usage

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-46542/42411

[cmsbuild]

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

It involves the following packages:

• FWCore/PluginManager (core)
• PerfTools/MaxMemoryPreload (core)

@Dr15Jones, @cmsbuild, @makortel, @smuzaffar can you please review it and eventually sign? Thanks.
@felicepantaleo, @missirol, @wddgit this is something you requested to watch as well.
@antoniovilela, @mandrenguyen, @rappoccio, @sextonkennedy you are the release manager for this.

cms-bot commands are listed here

[makortel]

@cmsbuild, please test

[makortel]

@Dr15Jones please review

[cmsbuild]

-1

Failed Tests: RelVals-INPUT
Size: This PR adds an extra 20KB to repository
Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-e2b65c/42447/summary.html
COMMIT: 45876c8
CMSSW: CMSSW_14_2_X_2024-10-29-1100/el8_amd64_gcc12
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmssw/46542/42447/install.sh to create a dev area with all the needed externals and cmssw changes.

• DAS Queries: The DAS query tests failed, see the summary page for details.

RelVals-INPUT

• 2024.0000012024.000001_RunJetMET02024D_10k/step1_dasquery.log
• 2024.0010012024.001001_RunZeroBias2024D_10k/step1_dasquery.log
• 2024.1000012024.100001_RunJetMET02024C_10k/step1_dasquery.log

Expand to see more relval errors ...

• 2024.101001
• 2024.000001
• 2024.001001
• 2024.100001
• 2024.101001

Comparison Summary

Summary:

• You potentially added 1 lines to the logs
• Reco comparison results: 10 differences found in the comparisons
• DQMHistoTests: Total files compared: 46
• DQMHistoTests: Total histograms compared: 3569372
• DQMHistoTests: Total failures: 416
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3568936
• DQMHistoTests: Total skipped: 20
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 45 files compared)
• Checked 201 log files, 171 edm output root files, 46 DQM output files
• TriggerResults: no differences found

[makortel]

@cmsbuild, please test

[makortel]

Comparison differences are related to #46416

[makortel]

To document the level of reduction in max memory

[cmsbuild]

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

[makortel]

+core

[cmsbuild]

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

[makortel]

ignore tests-rejected with external-failure

[mandrenguyen]

+1