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From "Sunil G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4712) CPU Usage Metric is not captured properly in YARN-2928
Date Mon, 22 Feb 2016 04:54:18 GMT

    [ https://issues.apache.org/jira/browse/YARN-4712?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15156478#comment-15156478
] 

Sunil G commented on YARN-4712:
-------------------------------

Hi [~Naganarasimha Garla]
For point 1, YARN-4308 was also trying to indicate a possible -ve CPU usage. Is it  similar?

> CPU Usage Metric is not captured properly in YARN-2928
> ------------------------------------------------------
>
>                 Key: YARN-4712
>                 URL: https://issues.apache.org/jira/browse/YARN-4712
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Naganarasimha G R
>            Assignee: Naganarasimha G R
>
> There are 2 issues with CPU usage collection 
> * I was able to observe that that many times CPU usage got from {{pTree.getCpuUsagePercent()}}
is ResourceCalculatorProcessTree.UNAVAILABLE(i.e. -1) but ContainersMonitor do the calculation
 i.e. {{cpuUsageTotalCoresPercentage = cpuUsagePercentPerCore /resourceCalculatorPlugin.getNumProcessors()}}
because of which UNAVAILABLE check in {{NMTimelinePublisher.reportContainerResourceUsage}}
is not encountered. so proper checks needs to be handled
> * {{EntityColumnPrefix.METRIC}} uses always LongConverter but ContainerMonitor is publishing
decimal values for the CPU usage.



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