Hudson commented on YARN-2531:

FAILURE: Integrated in Hadoop-Hdfs-trunk #1874 (See 
YARN-2531. Added a configuration for admins to be able to override app-configs 
and enforce/not-enforce strict control of per-container cpu usage. Contributed 
by Varun Vasudev. (vinodkv: rev 9f6891d9ef7064d121305ca783eb62586c8aa018)
* hadoop-yarn-project/CHANGES.txt

> CGroups - Admins should be allowed to enforce strict cpu limits
> ---------------------------------------------------------------
>                 Key: YARN-2531
>                 URL: https://issues.apache.org/jira/browse/YARN-2531
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Varun Vasudev
>            Assignee: Varun Vasudev
>             Fix For: 2.6.0
>         Attachments: apache-yarn-2531.0.patch
> From YARN-2440 -
> {quote} 
> The other dimension to this is determinism w.r.t performance. Limiting to 
> allocated cores overall (as well as per container later) helps orgs run 
> workloads and reason about them deterministically. One of the examples is 
> benchmarking apps, but deterministic execution is a desired option beyond 
> benchmarks too.
> {quote}
> It would be nice to have an option to let admins to enforce strict cpu limits 
> for apps for things like benchmarking, etc. By default this flag should be 
> off so that containers can use available cpu but admin can turn the flag on 
> to determine worst case performance, etc.

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