Fix elements_with_stride_nd when the index is outside the extent [13.0.x]

[fwyzard]

PR description:

Extend testKernel.dev.cc with a 2D kernel test that uses large block sizes and redundant blocks.

Fix elements_with_stride_nd when the initial index is outside the extent; this fixes the issue revealed by the new test.

Also:

• add support for the AccCpuThreads accelerator;
• rename member variables for consistency;
• improve comments.

PR validation:

The new unit tests completes successfully.

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:

Backport of #42558.

[fwyzard]

type bugfix

[cmsbuild]

A new Pull Request was created by @fwyzard (Andrea Bocci) for CMSSW_13_0_X.

It involves the following packages:

• HeterogeneousCore/AlpakaInterface (heterogeneous)

@cmsbuild, @makortel, @fwyzard can you please review it and eventually sign? Thanks.
@makortel, @missirol, @rovere 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

• Backported from Fix elements_with_stride_nd when the index is outside the extent #42558

[fwyzard]

backport #42558

[fwyzard]

enable gpu

[fwyzard]

please test with cms-sw/cmsdist#8648

[fwyzard]

+heterogeneous

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_13_0_X IBs after it passes the integration tests and once validation in the development release cycle CMSSW_13_3_X is complete. 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)

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-b289c7/34264/summary.html
COMMIT: 938674c
CMSSW: CMSSW_13_0_X_2023-08-13-2300/el8_amd64_gcc11
Additional Tests: GPU
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/42561/34264/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially added 56 lines to the logs
• Reco comparison results: 23 differences found in the comparisons
• DQMHistoTests: Total files compared: 49
• DQMHistoTests: Total histograms compared: 3281270
• DQMHistoTests: Total failures: 129
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3281119
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 48 files compared)
• Checked 213 log files, 164 edm output root files, 49 DQM output files
• TriggerResults: no differences found

GPU Comparison Summary

Summary:

• No significant changes to the logs found
• Reco comparison results: 6 differences found in the comparisons
• DQMHistoTests: Total files compared: 3
• DQMHistoTests: Total histograms compared: 40086
• DQMHistoTests: Total failures: 199
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 39887
• DQMHistoTests: Total skipped: 0
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 2 files compared)
• Checked 8 log files, 6 edm output root files, 3 DQM output files
• TriggerResults: no differences found

[rappoccio]

+1