First version of LST in HLT with procModifiers

[VourMa]

PR description

This is a first version of a procModifier-based implementation of LST in HLT, based on top of CMSSW_14_1_0_pre7 + cms-sw#45117 + cms-sw#45508. The target branch has been adapted accordingly to be able to make a clear comparison.
It is an adaptation/improvement over #63, which becomes moot in terms of LST (also mkFit would need to be re-implemented with the usage of procModifiers from that PR).
It tries to reuse the trackingLST procModifier, and it introduces a new one, seedingLST, which may become also useful for the offline setup in the near future. It may be that the alpaka procModifier would need to be applied in conjunction with anything else (to be tested).

The performance is not as expected, so the code is being debugged. However, the PR is already good enough for people to take a look and comment on the implementation details.

Instructions on how to run

cmsrel CMSSW_14_1_0_pre7
cd CMSSW_14_1_0_pre7/src
cmsenv
git cms-init
git cms-addpkg Configuration HLTrigger
git remote add SegLink [email protected]:SegmentLinking/cmssw.git
git fetch SegLink
git checkout CMSSW_14_1_0_pre7_LST_alpakaPatatrackInHLT_LSTInHLT
scram b -j 16

# Rerun L1, needed because the HLT samples I am using are produced with 14_0_X
cmsDriver.py Phase2 -s L1,L1TrackTrigger \
--conditions auto:phase2_realistic_T33 \
--geometry Extended2026D110 \
--era Phase2C17I13M9 \
--eventcontent FEVTDEBUGHLT \
--datatier GEN-SIM-DIGI-RAW-MINIAOD \
--customise SLHCUpgradeSimulations/Configuration/aging.customise_aging_1000,Configuration/DataProcessing/Utils.addMonitoring,L1Trigger/Configuration/customisePhase2FEVTDEBUGHLT.customisePhase2FEVTDEBUGHLT,L1Trigger/Configuration/customisePhase2TTOn110.customisePhase2TTOn110 \
--filein /store/mc/Phase2Spring24DIGIRECOMiniAOD/TT_TuneCP5_14TeV-powheg-pythia8/GEN-SIM-DIGI-RAW-MINIAOD/PU200_AllTP_140X_mcRun4_realistic_v4-v1/2560000/11d1f6f0-5f03-421e-90c7-b5815197fc85.root \
--fileout file:output_Phase2_L1T.root \
--inputCommands="keep *, drop l1tPFJets_*_*_*, drop l1tTrackerMuons_l1tTkMuonsGmt*_*_HLT" \
--outputCommands="drop l1tTrackerMuons_l1tTkMuonsGmt*_*_HLT" \
--mc -n 100 --nThreads 1

# Rerun L1 emulator + HLT (needed for any sample)
# In terms of procModifiers:
#    None -> Legacy seeding, CKF building
#    alpaka -> Patatrack seeding
#    trackingLST -> LST building for the initialStep
#    seedingLST -> LST seeding for the hightPtTripletStep
cmsDriver.py Phase2 -s L1P2GT,HLT:75e33 --processName=HLTX \
--conditions auto:phase2_realistic_T33 \
--geometry Extended2026D110 \
--era Phase2C17I13M9 \
--eventcontent FEVTDEBUGHLT \
--customise SLHCUpgradeSimulations/Configuration/aging.customise_aging_1000 \
--filein file:output_Phase2_L1T.root \
--fileout file:Phase2_L1P2GT_HLT.root \
--inputCommands="keep *, drop *_hlt*_*_HLT, drop triggerTriggerFilterObjectWithRefs_l1t*_*_HLT"
-n 100 --nThreads 10 \
--procModifiers alpaka,trackingLST,seedingLST

cmsDriver.py DQM -s VALIDATION:hltMultiTrackValidation \
--conditions auto:phase2_realistic_T33 \
--geometry Extended2026D110 \
--era Phase2C17I13M9 \
--datatier DQMIO \
--eventcontent DQM \
--filein file:Phase2_L1P2GT_HLT.root \
--hltProcess HLTX \
--fileout DQM.root \
-n 100 --nThreads 10

cmsDriver.py HARVEST -s HARVESTING:@trackingOnlyValidation+@trackingOnlyDQM+postProcessorHLTtrackingSequence \
--filein file:DQM.root \
--scenario pp \
--filetype DQM \
--conditions auto:phase2_realistic_T33 \
--mc -n 100

mv DQM_V0001_R000000001__Global__CMSSW_X_Y_Z__RECO.root configName.root
makeTrackValidationPlots.py configName.root --extended

[VourMa]

I have updated the code to a working version and I have included the running commands in the description (together with some explanatory text).

[VourMa]

Superseded by #94 (this one was missing a few important LST updates on 14_1_0_pre7 and rebasing it became messy).