DAQ input throttling (12_1_X)

[smorovic]

Adding a mechanism to throttle processing using the input source when notified by the hltd daemon using a file marker.
This mechanism is implemented to have data safety and backpressure mechanism in DAQ with a limited size ramdisk now used as the output disk on HLT Filter Units.

We are planning to push this into production if possible this week (backport to 12_0_X will be created as well), so please review as soon as possible.

PR validation:

Tested in a small scale DAQ/HLT setup in CERN openstack.

[cmsbuild]

-code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-35833/26196

• This PR adds an extra 56KB to repository

Code check has found code style and quality issues which could be resolved by applying following patch(s)

• code-format:
  https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-35833/26196/code-format.patch
  e.g. curl -k https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-35833/26196/code-format.patch | patch -p1
  You can also run scram build code-format to apply code format directly

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-35833/26198

• This PR adds an extra 60KB to repository

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

  • File EventFilter/Utilities/src/FedRawDataInputSource.cc modified in PR(s): Improve various Patatrack Kernels #35598

[cmsbuild]

A new Pull Request was created by @smorovic (Srecko Morovic) for master.

It involves the following packages:

• EventFilter/Utilities (daq, reconstruction)

@jpata, @cmsbuild, @emeschi, @smorovic, @slava77 can you please review it and eventually sign? Thanks.
@Martin-Grunewald, @missirol 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

[smorovic]

@cmsbuild please test

[smorovic]

+daq

[perrotta]

please abort
(the tests are still picking up an IB without the fix for FastSim...)

[perrotta]

please test with #35801

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-9739fd/19925/summary.html
COMMIT: 0c7ec10
CMSSW: CMSSW_12_1_X_2021-10-25-1100/slc7_amd64_gcc900
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/35833/19925/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• No significant changes to the logs found
• Reco comparison results: 0 differences found in the comparisons
• DQMHistoTests: Total files compared: 41
• DQMHistoTests: Total histograms compared: 2797338
• DQMHistoTests: Total failures: 0
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 2797316
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 40 files compared)
• Checked 173 log files, 37 edm output root files, 41 DQM output files
• TriggerResults: no differences found

[slava77]

+reconstruction

for #35833 0c7ec10

• code changes are outside of reco files (tcdsraw2digi) in the shared EventFilter/Utilities package

[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, @qliphy (and backports should be raised in the release meeting by the corresponding L2)

[perrotta]

+1