Drop support for the old alpaka accelerator framework

[fwyzard]

PR description:

Remove support for the initial alpaka-based accelerator framework, that was a straight porting of the CUDA approach.
An improved version of the accelerator framework is already available and used by all the tests in CMSSW 13.0.x and 13.1.x.

PR validation:

Unit tests pass.

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:

To be backported to CMSSW_13_0_x for eventual deployment in data taking.

[fwyzard]

enable gpu

[fwyzard]

please test

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-41341/35167

• This PR adds an extra 16KB to repository

• There are other open Pull requests which might conflict with changes you have proposed:

  • File HeterogeneousCore/AlpakaTest/plugins/alpaka/TestAlpakaProducer.cc modified in PR(s): Add support to multi layout portable collections (any number) #40285

[cmsbuild]

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

It involves the following packages:

• DataFormats/Portable (heterogeneous)
• DataFormats/PortableTestObjects (heterogeneous)
• HeterogeneousCore/AlpakaCore (heterogeneous)
• HeterogeneousCore/AlpakaTest (heterogeneous)

@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

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-5ddb43/31975/summary.html
COMMIT: 204b800
CMSSW: CMSSW_13_1_X_2023-04-13-2300/el8_amd64_gcc11
Additional Tests: GPU
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/41341/31975/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially added 12 lines to the logs
• Reco comparison results: 12 differences found in the comparisons
• DQMHistoTests: Total files compared: 48
• DQMHistoTests: Total histograms compared: 3459609
• DQMHistoTests: Total failures: 6
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3459581
• 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

GPU Comparison Summary

Summary:

• No significant changes to the logs found
• Reco comparison results: 0 differences found in the comparisons
• DQMHistoTests: Total files compared: 4
• DQMHistoTests: Total histograms compared: 19862
• DQMHistoTests: Total failures: 9
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 19853
• DQMHistoTests: Total skipped: 0
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 3 files compared)
• Checked 12 log files, 9 edm output root files, 4 DQM output files
• TriggerResults: no differences found

[fwyzard]

OK, looks good on my side.

@makortel, do you see any issues with this ?

[makortel]

+heterogeneous

Looks good to me too, thanks!

[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