Add SiPixelVCal DB object for pixel gain calibration

[IzaakWN]

PR description:

This new SiPixelVCal DB object is used for pixel gain calibration. The object saves a map between DetIDs (i.e. pixel modules) and VCal structs. The VCal struct only saves two floats: slope and offset to convert VCal to #electrons.

#electrons = slope * VCal + offset

Documentation is found in these slides:
https://indico.cern.ch/event/914013/#10-gain-calibration-for-run3-p

PR validation:

This code does not affect anything else inside CMSSW. It is only used for the pixel gain calibration in the independent DPGAnalysis-SiPixelTools repository.

The code compiles and works as expected, for example to create and read a .db file (see the above slides).

[cmsbuild]

@IzaakWN, CMSSW_11_1_X branch is closed for direct updates. cms-bot is going to move this PR to master branch.
In future, please use cmssw master branch to submit your changes.

[cmsbuild]

The code-checks are being triggered in jenkins.

[cmsbuild]

-code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-29829/15357

• This PR adds an extra 124KB 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-29829/15357/code-format.patch
  e.g. curl https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-29829/15357/code-format.patch | patch -p1
  You can also run scram build code-format to apply code format directly

[cmsbuild]

The code-checks are being triggered in jenkins.

[cmsbuild]

-code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-29829/15358

• This PR adds an extra 128KB 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-29829/15358/code-format.patch
  e.g. curl https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-29829/15358/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-29829/15475

• This PR adds an extra 148KB to repository

[cmsbuild]

Pull request #29829 was updated. @christopheralanwest, @tocheng, @cmsbuild, @tlampen, @ggovi, @pohsun can you please check and sign again.

[mmusich]

@cmsbuild, please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-run-pr-tests/6389/console Started: 2020/05/18 14:52

[cmsbuild]

+1
Tested at: b05e06a
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-0ee259/6389/summary.html
CMSSW: CMSSW_11_1_X_2020-05-18-1100
SCRAM_ARCH: slc7_amd64_gcc820

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-0ee259/6389/summary.html

Comparison Summary:

• No significant changes to the logs found
• Reco comparison results: 0 differences found in the comparisons
• DQMHistoTests: Total files compared: 35
• DQMHistoTests: Total histograms compared: 2694466
• DQMHistoTests: Total failures: 48
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 2694369
• DQMHistoTests: Total skipped: 49
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 34 files compared)
• Checked 150 log files, 16 edm output root files, 35 DQM output files

[pohsun]

+1

[ggovi]

+1

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

[silviodonato]

+1