option to use deterministic event-based seed in SmearedJetProducer (for MT) #20240

kpedro88 · 2017-08-22T22:36:27Z

While upgrade my ntuple production code to use multithreading, I noticed the output jet collections differed for MC samples. I found the cause to be the use of random numbers in SmearedPATJetProducer. The solution is to use a deterministic seed based on the event number (thanks to @Dr15Jones for the suggestion). I followed the approach from https://github.com/cms-sw/cmssw/blob/CMSSW_9_3_0_pre4/RecoJets/JetProducers/plugins/VirtualJetProducer.cc#L272 (in a simplified manner). This resolved the regression I observed in my ntuple code when running with multiple threads.

This PR will be backported to 80X. Questions for jet people (e.g. @rappoccio, @blinkseb, @zdemirag):

Currently I have the useDeterministicSeed option disabled by default in the fillDescriptions(), so users would have to activate it manually. Should I enable it by default instead? This would change the default output. Edit: it was changed to be enabled by default.
Are other backports desired? (e.g. 92X)

…or MT)

cmsbuild · 2017-08-22T22:36:50Z

The code-checks are being triggered in jenkins.

cmsbuild · 2017-08-22T22:36:51Z

A new Pull Request was created by @kpedro88 (Kevin Pedro) for master.

It involves the following packages:

PhysicsTools/PatUtils

@perrotta, @cmsbuild, @monttj, @slava77 can you please review it and eventually sign? Thanks.
@TaiSakuma, @gouskos, @imarches, @ahinzmann, @acaudron, @mmarionncern, @rappoccio, @jdolen, @nhanvtran, @gpetruc, @gkasieczka, @schoef, @ferencek, @mverzett, @mariadalfonso, @pvmulder, @seemasharmafnal, @JyothsnaKomaragiri this is something you requested to watch as well.
@davidlange6, @slava77 you are the release manager for this.

cms-bot commands are listed here

kpedro88 · 2017-08-22T22:36:59Z

please test

cmsbuild · 2017-08-22T22:37:42Z

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/22435/console Started: 2017/08/23 01:12

cmsbuild · 2017-08-22T22:40:13Z

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/PR-20240/257

cmsbuild · 2017-08-23T00:45:35Z

+1
Tested at: 4514a35
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-20240/22435/summary.html

The following merge commits were also included on top of IB + this PR after doing git cms-merge-topic:
e739f38
You can see more details here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-20240/22435/git-log-recent-commits
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-20240/22435/git-merge-result

cmsbuild · 2017-08-23T00:45:37Z

Comparison job queued.

cmsbuild · 2017-08-23T02:22:41Z

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-20240/22435/summary.html

Comparison Summary:

No significant changes to the logs found
Reco comparison results: 0 differences found in the comparisons
DQMHistoTests: Total files compared: 26
DQMHistoTests: Total histograms compared: 2653934
DQMHistoTests: Total failures: 242
DQMHistoTests: Total nulls: 0
DQMHistoTests: Total successes: 2653503
DQMHistoTests: Total skipped: 189
DQMHistoTests: Total Missing objects: 0
Checked 107 log files, 14 edm output root files, 26 DQM output files

slava77 · 2017-08-24T14:57:37Z

@kpedro88
isn't this also needed in 92X?

kpedro88 · 2017-08-24T15:10:37Z

@slava77 wasn't sure, that's why I asked the jet experts in the PR description - I can just make a backport now if you think it's worthwhile

kpedro88 · 2017-08-24T15:12:09Z

Also, it was pointed out to me that this change solves a similar problem with reproducibility in CRAB if a job is split differently each time it's run, so maybe it should be enabled by default. I would still like to hear from jet experts on this (@rappoccio, @blinkseb, @zdemirag, ...).

kpedro88 · 2017-09-01T16:11:56Z

@slava77 is the latest commit okay? Let me know and then I'll update the backports

cmsbuild · 2017-09-01T16:11:57Z

The code-checks are being triggered in jenkins.

cmsbuild · 2017-09-01T16:11:57Z

Pull request #20240 was updated. @perrotta, @cmsbuild, @monttj, @slava77 can you please check and sign again.

cmsbuild · 2017-09-01T16:13:43Z

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/PR-20240/450

slava77 · 2017-09-01T17:15:56Z

@slava77 is the latest commit okay? Let me know and then I'll update the backports

yes, it covers the concerns mentioned so far.

slava77 · 2017-09-01T17:16:18Z

@cmsbuild please test

cmsbuild · 2017-09-01T17:16:36Z

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/22656/console Started: 2017/09/01 19:17

cmsbuild · 2017-09-01T18:48:50Z

+1
Tested at: e4d33c5
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-20240/22656/summary.html

The following merge commits were also included on top of IB + this PR after doing git cms-merge-topic:
91fd772
You can see more details here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-20240/22656/git-log-recent-commits
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-20240/22656/git-merge-result

cmsbuild · 2017-09-01T18:48:53Z

Comparison job queued.

cmsbuild · 2017-09-01T20:26:26Z

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-20240/22656/summary.html

Comparison Summary:

No significant changes to the logs found
Reco comparison results: 0 differences found in the comparisons
DQMHistoTests: Total files compared: 26
DQMHistoTests: Total histograms compared: 2656222
DQMHistoTests: Total failures: 220
DQMHistoTests: Total nulls: 0
DQMHistoTests: Total successes: 2655813
DQMHistoTests: Total skipped: 189
DQMHistoTests: Total Missing objects: 0
Checked 107 log files, 14 edm output root files, 26 DQM output files

slava77 · 2017-09-05T21:12:33Z

PhysicsTools/PatUtils/python/patPFMETCorrections_cff.py

@@ -138,6 +138,7 @@
    variation = cms.int32(0),  # If not specified, default to 0

    seed = cms.uint32(37428479),  # If not specified, default to 37428479
+    useDeterministicSeed = cms.bool(True),


this does not match the PR description

Currently I have the useDeterministicSeed option disabled by default

I suppose, the description should be updated.

slava77 · 2017-09-05T21:36:36Z

+1

for #20240 e4d33c5

deterministic random numbers are implemented and enabled by default
jenkins tests pass and comparisons with baseline show some differences in MC workflows in METUnc_JetRes{Up,Down} plots as expected

kpedro88 · 2017-09-06T02:38:29Z

@slava77 updated PR description

davidlange6 · 2017-09-06T07:30:30Z

merge

option to use deterministic event-based seed in SmearedJetProducer (f…

4514a35

…or MT)

cmsbuild added this to the CMSSW_9_3_X milestone Aug 22, 2017

kpedro88 mentioned this pull request Aug 22, 2017

option to use deterministic event-based seed in SmearedJetProducer (for MT) [80X] #20241

Merged

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kpedro88 mentioned this pull request Aug 24, 2017

option to use deterministic event-based seed in SmearedJetProducer (for MT) [92X] #20259

Merged

cmsbuild added comparison-pending tests-pending labels Sep 1, 2017

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slava77 reviewed Sep 5, 2017

View reviewed changes

cmsbuild added reconstruction-approved and removed reconstruction-pending labels Sep 5, 2017

cmsbuild merged commit aa14a75 into cms-sw:master Sep 6, 2017

kpedro88 mentioned this pull request Sep 22, 2017

Updates to precision timing integration in reconstruction and miniaod #20338

Merged

kpedro88 mentioned this pull request Oct 24, 2017

make phase-2 track time "reco" (smearing) in TrackTimeValueMapProducer reproducible #20621

Closed

zdemirag mentioned this pull request Oct 8, 2018

JER Corrections cms-nanoAOD/cmssw#202

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option to use deterministic event-based seed in SmearedJetProducer (for MT) #20240

option to use deterministic event-based seed in SmearedJetProducer (for MT) #20240

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option to use deterministic event-based seed in SmearedJetProducer (for MT) #20240

option to use deterministic event-based seed in SmearedJetProducer (for MT) #20240

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