[20.0.X] compareMemoryProfiles: support just one file in input

[mmusich]

backport of #51338

PR description:

Title says it all, useful to display at least the PR curves when the baseline failed (see cms-sw/cms-bot#2799)

PR validation:

Private tests.

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:

verbatim backport of #51338 to CMSSW_20_0_X

[cmsbuild]

A new Pull Request was created by @mmusich for CMSSW_20_0_X.

It involves the following packages:

• HLTrigger/Configuration (hlt)

@Martin-Grunewald, @cmsbuild, @mmusich can you please review it and eventually sign? Thanks.
@Martin-Grunewald, @missirol this is something you requested to watch as well.
@ftenchini, @mandrenguyen, @sextonkennedy you are the release manager for this.

cms-bot commands are listed here

• Backported from compareMemoryProfiles: support just one file in input #51338

[cmsbuild]

cms-bot internal usage

[mmusich]

test parameters:

• enable = hlt_p2_timing
• pull_request = run-pr-hlt-p2-timing: support plotting resource usage when baseline failed cms-bot#2800

[mmusich]

@cmsbuild, please test

[cmsbuild]

+1

Size: This PR adds an extra 20KB to repository
Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-f6da4c/54341/summary.html
COMMIT: 08a62c7
CMSSW: CMSSW_20_0_X_2026-06-28-0000/el8_amd64_gcc13
Additional Tests: HLT_P2_TIMING
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/51347/54341/install.sh to create a dev area with all the needed externals and cmssw changes.

HLT P2 Timing: chart

Comparison Summary

Summary:

• No significant changes to the logs found
• Reco comparison results: 0 differences found in the comparisons
• DQMHistoTests: Total files compared: 44
• DQMHistoTests: Total histograms compared: 3248390
• DQMHistoTests: Total failures: 0
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3248372
• DQMHistoTests: Total skipped: 18
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 43 files compared)
• Checked 191 log files, 159 edm output root files, 44 DQM output files
• TriggerResults: no differences found