limit the number of seeds, same as in CkfTrackCandidateMakerBase (backport of #38926)

[slava77]

this is a follow up to https://cms-talk.web.cern.ch/t/high-memory-usage-in-reco-job-for-workflow-promptreco-run356323-met/13471/5

this PR introduces a limit on the number of seeds acceptable for mkFit processing at 500K (same as in CkfTrackCandidateMakerBase)

In the problematic event of the MET PD there were 2969225 seeds in the pixelLess iteration

[cmsbuild]

A new Pull Request was created by @slava77 (Slava Krutelyov) for CMSSW_12_4_X.

It involves the following packages:

• RecoTracker/MkFit (reconstruction)

@jpata, @cmsbuild, @clacaputo can you please review it and eventually sign? Thanks.
@VourMa, @makortel, @felicepantaleo, @GiacomoSguazzoni, @JanFSchulte, @rovere, @VinInn, @gpetruc, @mmusich, @mtosi, @dgulhan this is something you requested to watch as well.
@perrotta, @dpiparo, @qliphy, @rappoccio you are the release manager for this.

cms-bot commands are listed here

• Backported from limit the number of seeds, same as in CkfTrackCandidateMakerBase #38926

[slava77]

backport of #38926

[mmusich]

please test

[mmusich]

urgent

• presumably needed for the next patch of 12.4.x

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-573ad7/26592/summary.html
COMMIT: ea621ed
CMSSW: CMSSW_12_4_X_2022-08-01-2300/el8_amd64_gcc10
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/38927/26592/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: 2 differences found in the comparisons
• DQMHistoTests: Total files compared: 50
• DQMHistoTests: Total histograms compared: 3676198
• DQMHistoTests: Total failures: 8
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3676168
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 49 files compared)
• Checked 208 log files, 45 edm output root files, 50 DQM output files
• TriggerResults: no differences found

[clacaputo]

+reconstruction

• backport limit the number of seeds, same as in CkfTrackCandidateMakerBase #38926
• follow up to high-memory-usage-in-reco-job-for-workflow-promptreco-run356323-met
• max number of seeds in MkFit limited as in CkfTrackCandidateMakerBase

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_12_4_X IBs (tests are also fine) and once validation in the development release cycle CMSSW_12_5_X is complete. This pull request will now be reviewed by the release team before it's merged. @perrotta, @dpiparo, @qliphy, @rappoccio (and backports should be raised in the release meeting by the corresponding L2)

[qliphy]

+1