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Try a second time if pop fails in ReusableObjectHolder #36813

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Try a second time if pop fails in ReusableObjectHolder #36813

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Dr15Jones
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PR description:

Experience has shown that for some builds, tbb::concurrent_queue try_pop appears to falsely fail. Adding a second attempt to try to decrease that frequency.

PR validation:

Code compiles and the related unit test passes.

@Dr15Jones
Try a second time if pop fails in ReusableObjectHolder
581c00f 
Experience has shown that for some builds, tbb::concurrent_queue
try_pop appears to falsely fail. Adding a second attempt to try
to decrease that frequency.
@cmsbuild cmsbuild added this to the CMSSW_12_3_X milestone Jan 26, 2022
@cmsbuild
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+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-36813/27969

  • This PR adds an extra 16KB to repository

@cmsbuild
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A new Pull Request was created by @Dr15Jones (Chris Jones) for master.

It involves the following packages:

  • FWCore/Utilities (core)

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

cms-bot commands are listed here

@makortel
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@cmsbuild, please test

@makortel makortel mentioned this pull request Jan 26, 2022
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@makortel
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@cmsbuild, please test for slc7_aarch64_gcc11

@Dr15Jones
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So I looked at the implementation of oneApi::tbb::concurrent_queue::try_pop and they make use of std::memory_order::relaxed in a couple of places which could definitely lead to the false positives.

@cmsbuild
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-1

Failed Tests: UnitTests RelVals
Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-744ca0/22029/summary.html
COMMIT: 581c00f
CMSSW: CMSSW_12_3_X_2022-01-24-2300/slc7_aarch64_gcc11
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmssw/36813/22029/install.sh to create a dev area with all the needed externals and cmssw changes.

The following merge commits were also included on top of IB + this PR after doing git cms-merge-topic:

You can see more details here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-744ca0/22029/git-recent-commits.json
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-744ca0/22029/git-merge-result

Unit Tests

I found errors in the following unit tests:

---> test TestFWCoreIntegrationStandalone had ERRORS
---> test unitTestsGroup_1 had ERRORS
---> test unitTestsGroup_4 had ERRORS
---> test testFWCoreUtilities had ERRORS
and more ...

RelVals

----- Begin Fatal Exception 26-Jan-2022 23:19:50 CET-----------------------
An exception of category 'Vertex' occurred while
   [0] Processing  Event run: 194533 lumi: 329 event: 462355458 stream: 0
   [1] Running path 'dqmofflineOnPAT_1_step'
   [2] Prefetching for module SingleTopTChannelLeptonDQM_miniAOD/'singleTopElectronMediumDQM_miniAOD'
   [3] Prefetching for module PATMuonSlimmer/'slimmedMuons'
   [4] Prefetching for module PATMuonSelector/'selectedPatMuons'
   [5] Prefetching for module PATMuonProducer/'patMuons'
   [6] Prefetching for module MuonProducer/'muons'
   [7] Prefetching for module PFProducer/'particleFlowTmp'
   [8] Prefetching for module PFBlockProducer/'particleFlowBlock'
   [9] Prefetching for module PFElecTkProducer/'pfTrackElec'
   [10] Prefetching for module PFConversionProducer/'pfConversions'
   [11] Calling method for module ConversionProducer/'allConversions'
Exception Message:
Refitted track not found in list
----- End Fatal Exception -------------------------------------------------

----- Begin Fatal Exception 26-Jan-2022 23:32:46 CET-----------------------
An exception of category 'Vertex' occurred while
   [0] Processing  Event run: 326479 lumi: 7 event: 1579493 stream: 0
   [1] Running path 'dqmoffline_8_step'
   [2] Prefetching for module SMPDQM/'SMPDQM'
   [3] Prefetching for module MuonProducer/'muons'
   [4] Prefetching for module PFProducer/'particleFlowTmp'
   [5] Prefetching for module PFBlockProducer/'particleFlowBlock'
   [6] Prefetching for module PFElecTkProducer/'pfTrackElec'
   [7] Prefetching for module PFConversionProducer/'pfConversions'
   [8] Calling method for module ConversionProducer/'allConversions'
Exception Message:
Refitted track not found in list
----- End Fatal Exception -------------------------------------------------

----- Begin Fatal Exception 26-Jan-2022 23:49:16 CET-----------------------
An exception of category 'Vertex' occurred while
   [0] Processing  Event run: 319450 lumi: 76 event: 106007323 stream: 0
   [1] Running path 'dqmoffline_10_step'
   [2] Prefetching for module SMPDQM/'SMPDQM'
   [3] Prefetching for module MuonProducer/'muons'
   [4] Prefetching for module PFProducer/'particleFlowTmp'
   [5] Prefetching for module PFBlockProducer/'particleFlowBlock'
   [6] Prefetching for module PFElecTkProducer/'pfTrackElec'
   [7] Prefetching for module PFConversionProducer/'pfConversions'
   [8] Calling method for module ConversionProducer/'allConversions'
Exception Message:
Refitted track not found in list
----- End Fatal Exception -------------------------------------------------

@makortel
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On a sample of one test, this didn't seem to fully cure the "issue"

===== Test "testFWCoreUtilities" ====
Running ............................... # seen: 3 3
F...

reusableobjectholder_t.cppunit.cpp:241:Assertion
Test name: reusableobjectholder_test::testSimultaneousUse
assertion failed
- Expression: t1ItemsSeen.size() > 0 && t1ItemsSeen.size() < 3

Failures !!!
Run: 34   Failure total: 1   Failures: 1   Errors: 0

---> test testFWCoreUtilities had ERRORS

(whether it had an impact on the distribution of elements in the ReusableObjectHolder would require larger scale test)

@cmsbuild
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-1

Failed Tests: UnitTests
Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-744ca0/22028/summary.html
COMMIT: 581c00f
CMSSW: CMSSW_12_3_X_2022-01-26-1100/slc7_amd64_gcc10
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmssw/36813/22028/install.sh to create a dev area with all the needed externals and cmssw changes.

The following merge commits were also included on top of IB + this PR after doing git cms-merge-topic:

You can see more details here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-744ca0/22028/git-recent-commits.json
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-744ca0/22028/git-merge-result

Unit Tests

I found errors in the following unit tests:

---> test materialBudgetTrackerPlots had ERRORS

Comparison Summary

Summary:

  • No significant changes to the logs found
  • Reco comparison results: 332 differences found in the comparisons
  • DQMHistoTests: Total files compared: 43
  • DQMHistoTests: Total histograms compared: 3449324
  • DQMHistoTests: Total failures: 89
  • DQMHistoTests: Total nulls: 0
  • DQMHistoTests: Total successes: 3449213
  • DQMHistoTests: Total skipped: 22
  • DQMHistoTests: Total Missing objects: 0
  • DQMHistoSizes: Histogram memory added: 0.0 KiB( 42 files compared)
  • Checked 181 log files, 42 edm output root files, 43 DQM output files
  • TriggerResults: no differences found

@makortel
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-1

Per our discussion earlier, a different approach would be needed.

@Dr15Jones Dr15Jones closed this Feb 8, 2022
@Dr15Jones Dr15Jones deleted the tryAgainReusableObjectHolder branch February 10, 2022 16:37
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@Dr15Jones @cmsbuild @makortel