[jira] [Commented] (YARN-5179) Issue of CPU usage of containers

["Inigo Goiri (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-5179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15371957#comment-15371957 ] 

Inigo Goiri commented on YARN-5179:
-----------------------------------

[~asuresh], given that YARN-5117 acknowledges that there is a problem with the way we calculated the CPU usage, I agree with [~Zhongkai] that we should revisit the way that milliVCores is computed in {{ContainersMonitorImpl}}. [~Zhongkai], could you upload a patch with your proposal to see if it makes sense?

> Issue of CPU usage of containers
> --------------------------------
>
>                 Key: YARN-5179
>                 URL: https://issues.apache.org/jira/browse/YARN-5179
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 2.7.0
>         Environment: Both on Windows and Linux
>            Reporter: Zhongkai Mi
>
> // Multiply by 1000 to avoid losing data when converting to int 
>        int milliVcoresUsed = (int) (cpuUsageTotalCoresPercentage * 1000 
>               * maxVCoresAllottedForContainers /nodeCpuPercentageForYARN); 
> This formula will not get right CPU usage based vcore if vcores != physical cores. 



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