[17.0] Update the requested memory size in reused blocks

[fwyzard]

PR description:

Update the CachingAllocator requested size in reused blocks.

PR validation:

None.

Backport status:

Backport of #51741.

[cmsbuild]

cms-bot internal usage

[fwyzard]

type bugfix

[fwyzard]

backport #51741

[fwyzard]

please test

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-51743/50684

[cmsbuild]

A new Pull Request was created by @fwyzard for CMSSW_17_0_X.

It involves the following packages:

• HeterogeneousCore/AlpakaInterface (heterogeneous)

@fwyzard, @makortel can you please review it and eventually sign? Thanks.
@makortel, @rovere this is something you requested to watch as well.
@ftenchini, @mandrenguyen, @sextonkennedy you are the release manager for this.

cms-bot commands are listed here

• Backported from Update the requested memory size in reused blocks #51741

[cmsbuild]

-1

Failed Tests: RelVals-AMD_W7900
Size: This PR adds an extra 24KB to repository
Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-de57c9/55490/summary.html
COMMIT: 2e17bfc
CMSSW: CMSSW_17_0_X_2026-08-20-2300/el8_amd64_gcc13
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmssw/51743/55490/install.sh to create a dev area with all the needed externals and cmssw changes.

Failed RelVals-AMD_W7900

• 34634.750334634.7503_TTbar_14TeV+Run4D121PU_HLTHeterogeneousValid/step2_TTbar_14TeV+Run4D121PU_HLTHeterogeneousValid.log

Comparison Summary

Summary:

• You potentially removed 2 lines from the logs
• Reco comparison results: 4 differences found in the comparisons
• DQMHistoTests: Total files compared: 54
• DQMHistoTests: Total histograms compared: 4337615
• DQMHistoTests: Total failures: 57
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 4337538
• DQMHistoTests: Total skipped: 20
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 53 files compared)
• Checked 232 log files, 203 edm output root files, 54 DQM output files
• TriggerResults: no differences found

NVIDIA_H100 Comparison Summary

Summary:

• You potentially added 14 lines to the logs
• Reco comparison results: 422 differences found in the comparisons
• DQMHistoTests: Total files compared: 13
• DQMHistoTests: Total histograms compared: 222745
• DQMHistoTests: Total failures: 32588
• DQMHistoTests: Total nulls: 37
• DQMHistoTests: Total successes: 190120
• DQMHistoTests: Total skipped: 0
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 12 files compared)
• Checked 54 log files, 55 edm output root files, 13 DQM output files
• TriggerResults: found differences in 6 / 12 workflows

NVIDIA_L4 Comparison Summary

Summary:

• You potentially removed 10 lines from the logs
• Reco comparison results: 383 differences found in the comparisons
• DQMHistoTests: Total files compared: 13
• DQMHistoTests: Total histograms compared: 222745
• DQMHistoTests: Total failures: 31592
• DQMHistoTests: Total nulls: 29
• DQMHistoTests: Total successes: 191124
• DQMHistoTests: Total skipped: 0
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 12 files compared)
• Checked 54 log files, 55 edm output root files, 13 DQM output files
• TriggerResults: found differences in 5 / 12 workflows

NVIDIA_L40S Comparison Summary

Summary:

• You potentially removed 9 lines from the logs
• Reco comparison results: 372 differences found in the comparisons
• DQMHistoTests: Total files compared: 13
• DQMHistoTests: Total histograms compared: 222745
• DQMHistoTests: Total failures: 30061
• DQMHistoTests: Total nulls: 36
• DQMHistoTests: Total successes: 192648
• DQMHistoTests: Total skipped: 0
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 12 files compared)
• Checked 54 log files, 55 edm output root files, 13 DQM output files
• TriggerResults: found differences in 5 / 12 workflows

NVIDIA_T4 Comparison Summary

Summary:

• You potentially removed 1 lines from the logs
• Reco comparison results: 363 differences found in the comparisons
• DQMHistoTests: Total files compared: 13
• DQMHistoTests: Total histograms compared: 222745
• DQMHistoTests: Total failures: 30208
• DQMHistoTests: Total nulls: 36
• DQMHistoTests: Total successes: 192501
• DQMHistoTests: Total skipped: 0
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 12 files compared)
• Checked 54 log files, 55 edm output root files, 13 DQM output files
• TriggerResults: found differences in 1 / 12 workflows

Max Memory Comparisons exceeding threshold NVIDIA_H100

@cms-sw/core-l2 , I found 1 workflow step(s) with memory usage exceeding the error threshold:

Expand to see workflows ...

• Error: Workflow 34634.712_TTbar_14TeV+Run4D121PU_lstOnGPUIters01TrackingOnly step3 max memory diff 79.1 exceeds +/- 30.0 MiB

Max Memory Comparisons exceeding threshold NVIDIA_L4

@cms-sw/core-l2 , I found 1 workflow step(s) with memory usage exceeding the error threshold:

Expand to see workflows ...

• Error: Workflow 34634.712_TTbar_14TeV+Run4D121PU_lstOnGPUIters01TrackingOnly step3 max memory diff 79.4 exceeds +/- 30.0 MiB

Max Memory Comparisons exceeding threshold NVIDIA_L40S

@cms-sw/core-l2 , I found 1 workflow step(s) with memory usage exceeding the error threshold:

Expand to see workflows ...

• Error: Workflow 34634.712_TTbar_14TeV+Run4D121PU_lstOnGPUIters01TrackingOnly step3 max memory diff 66.8 exceeds +/- 30.0 MiB