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pantsbuild / pants / 7813
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main: 93%

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Build:
LAST BUILD BRANCH: add/port-target-adaptor-and-source-block
DEFAULT BRANCH: main
Ran 07 Nov 2015 04:45AM UTC
Jobs 8
Files 0
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Allow setting SubProcPool workers via --num-foreground-workers

SubProcPool is defaulting to cpu_count() number of workers, which causes extra processes contention on mesos container environment where cpu_count() >> actual available cores. For example, we see 24x processes on a containerized job with only 4 available core during batch artifact-fetch in zinc phase.

Runtracker._num-foreground-workers was set but never used, I suspect it's intended to influence SubProcPool.

Testing Done:
./pants compile $target --run-tracker-num-foreground-workers=6
Inside twitter repo, and observe the zinc-execute cache-fetch phase has 6+1 python process. changed to 8 and see 8+1.

Bugs closed: 2514

Reviewed at https://rbcommons.com/s/twitter/r/3082/
Jobs
ID Job ID Ran Files Coverage
1 7813.1 (CI_FLAGS="-cjlpn 'Various pants self checks'") 07 Nov 2015 04:46AM UTC 0
Travis Job 7813.1
4 7813.4 (CI_FLAGS="-fkmsrcjlp 'Python contrib tests'") 07 Nov 2015 04:50AM UTC 0
Travis Job 7813.4
5 7813.5 (CI_FLAGS="-fkmsrjlpn -i 0/6 'Python integration tests for pants - shard 1'") 07 Nov 2015 04:45AM UTC 0
Travis Job 7813.5
6 7813.6 (CI_FLAGS="-fkmsrjlpn -i 1/6 'Python integration tests for pants - shard 2'") 07 Nov 2015 04:52AM UTC 0
Travis Job 7813.6
7 7813.7 (CI_FLAGS="-fkmsrjlpn -i 2/6 'Python integration tests for pants - shard 3'") 07 Nov 2015 04:51AM UTC 0
Travis Job 7813.7
8 7813.8 (CI_FLAGS="-fkmsrjlpn -i 3/6 'Python integration tests for pants - shard 4'") 07 Nov 2015 04:53AM UTC 0
Travis Job 7813.8
9 7813.9 (CI_FLAGS="-fkmsrjlpn -i 4/6 'Python integration tests for pants - shard 5'") 07 Nov 2015 04:51AM UTC 0
Travis Job 7813.9
10 7813.10 (CI_FLAGS="-fkmsrjlpn -i 5/6 'Python integration tests for pants - shard 6'") 07 Nov 2015 04:57AM UTC 0
Travis Job 7813.10
Source Files on build 7813
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