Hadoop QA commented on YARN-2352:

{color:red}-1 overall{color}.  Here are the results of testing the latest 
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author 

    {color:green}+1 tests included{color}.  The patch appears to include 1 new 
or modified test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the 
total number of javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with 

    {color:red}-1 findbugs{color}.  The patch appears to introduce 2 new 
Findbugs (version 2.0.3) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase 
the total number of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in 

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: 
Findbugs warnings: 
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/4544//console

This message is automatically generated.

> FairScheduler: Collect metrics on duration of critical methods that affect 
> performance
> --------------------------------------------------------------------------------------
>                 Key: YARN-2352
>                 URL: https://issues.apache.org/jira/browse/YARN-2352
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: scheduler
>    Affects Versions: 2.4.1
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>         Attachments: fs-perf-metrics.png, yarn-2352-1.patch, 
> yarn-2352-2.patch, yarn-2352-2.patch, yarn-2352-3.patch
> We need more metrics for better visibility into FairScheduler performance. At 
> the least, we need to do this for (1) handle node events, (2) update, (3) 
> compute fairshares, (4) preemption.

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