fix ExtVec for clang

[VinInn]

The length of the vector was wrong for clang.
clang support GCC vector extension syntax: no reason to use OpenCL one.

The effect is only visible in explicit tests and for clang build on ARM or Power
(I expect some workflow should have failed)

[VinInn]

fixes #41707

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-41744/35607

• This PR adds an extra 16KB to repository

[cmsbuild]

A new Pull Request was created by @VinInn (Vincenzo Innocente) for master.

It involves the following packages:

• DataFormats/Math (reconstruction)

@cmsbuild, @mandrenguyen, @clacaputo can you please review it and eventually sign? Thanks.
@makortel, @felicepantaleo, @fabiocos, @rovere, @missirol this is something you requested to watch as well.
@perrotta, @dpiparo, @rappoccio you are the release manager for this.

cms-bot commands are listed here

[VinInn]

@cmsbuild please test

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-d5159f/32736/summary.html
COMMIT: 35e0324
CMSSW: CMSSW_13_2_X_2023-05-21-2300/el8_amd64_gcc11
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/41744/32736/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially removed 5 lines from the logs
• Reco comparison results: 228 differences found in the comparisons
• DQMHistoTests: Total files compared: 48
• DQMHistoTests: Total histograms compared: 3221591
• DQMHistoTests: Total failures: 63
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3221506
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 47 files compared)
• Checked 207 log files, 159 edm output root files, 48 DQM output files
• TriggerResults: no differences found

[smuzaffar]

please test for CMSSW_13_2_CLANG_X

[smuzaffar]

please test

use latest IB for default PR tests

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-d5159f/32745/summary.html
COMMIT: 35e0324
CMSSW: CMSSW_13_2_X_2023-05-22-1100/el8_amd64_gcc11
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/41744/32745/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially removed 10 lines from the logs
• Reco comparison results: 4 differences found in the comparisons
• DQMHistoTests: Total files compared: 48
• DQMHistoTests: Total histograms compared: 3221591
• DQMHistoTests: Total failures: 3
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3221566
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 47 files compared)
• Checked 207 log files, 159 edm output root files, 48 DQM output files
• TriggerResults: no differences found

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-d5159f/32744/summary.html
COMMIT: 35e0324
CMSSW: CMSSW_13_2_CLANG_X_2023-05-21-2300/el8_amd64_gcc11
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/41744/32744/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially added 9133 lines to the logs
• Reco comparison results: 23994 differences found in the comparisons
• DQMHistoTests: Total files compared: 48
• DQMHistoTests: Total histograms compared: 3221591
• DQMHistoTests: Total failures: 40296
• DQMHistoTests: Total nulls: 78
• DQMHistoTests: Total successes: 3181195
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 47 files compared)
• Checked 207 log files, 159 edm output root files, 48 DQM output files
• TriggerResults: found differences in 4 / 46 workflows

[mandrenguyen]

Is it expected that the reco comparison tests shows so many differences (even if they look quite small)?

[VinInn]

try the clang build on a different "technical" PR

[davidlange6]

you can see the baseline is a gcc build, so seems normal to me.

[mandrenguyen]

+1
Tiny reco diffs are from building on a different compiler

[cmsbuild]

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

[perrotta]

+1