Try converting RecoParticleFlow/PFTracking to GBRForest + GlobalCache (75X)

[lgray]

Backport of #10143

[cmsbuild]

A new Pull Request was created by @lgray (Lindsey Gray) for CMSSW_7_5_X.

Try converting RecoParticleFlow/PFTracking to GBRForest + GlobalCache (75X)

It involves the following packages:

RecoParticleFlow/PFClusterTools
RecoParticleFlow/PFTracking

@cmsbuild, @cvuosalo, @slava77 can you please review it and eventually sign? Thanks.
@mmarionncern, @bachtis this is something you requested to watch as well.
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@Degano you are the release manager for this.
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[slava77]

@cmsbuild please test

[lgray]

tests stuck here please resubmit.

[Dr15Jones]

@smuzaffar the tests appear stuck

[davidlange6]

Please test
(Chris you can ask too)

On Jul 28, 2015, at 1:59 PM, Chris Jones <notifications@github.commailto:notifications@github.com> wrote:

@smuzaffarhttps://github.com/smuzaffar the tests appear stuck

—
Reply to this email directly or view it on GitHubhttps://github.com//pull/10367#issuecomment-125574505.

[cvuosalo]

+1

For #10367 17de6f2

Putting GBRForest objects into edm::GlobalCaches to reduce memory usage for multi-threaded jobs. There should be no significant changes in monitored quantities. Reduction in memory use has been verified in the already merged 76X version of this PR, #10143.

The code changes are satisfactory, and Jenkins tests against baseline CMSSW_7_5_X_2015-07-28-1100 show no significant differences, as expected.

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_5_X IBs once checked with relvals in the development release cycle of CMSSW (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @Degano, @smuzaffar

[davidlange6]

+1