Karthik Kambatla commented on YARN-3122:

[~venkateshrin] - thanks for chiming in. 

Given that ResourceCalculatorProcessTree was @Private, I was okay with 
including an abstract method. As [~hitesh] points on YARN-3296, I understand 
why we would want to make it @Public. Let us continue the conversation there. 

> Metrics for container's actual CPU usage
> ----------------------------------------
>                 Key: YARN-3122
>                 URL: https://issues.apache.org/jira/browse/YARN-3122
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager
>    Affects Versions: 2.6.0
>            Reporter: Anubhav Dhoot
>            Assignee: Anubhav Dhoot
>             Fix For: 2.7.0
>         Attachments: YARN-3122.001.patch, YARN-3122.002.patch, 
> YARN-3122.003.patch, YARN-3122.004.patch, YARN-3122.005.patch, 
> YARN-3122.006.patch, YARN-3122.007.patch, YARN-3122.prelim.patch, 
> YARN-3122.prelim.patch
> It would be nice to capture resource usage per container, for a variety of 
> reasons. This JIRA is to track CPU usage. 
> YARN-2965 tracks the resource usage on the node, and the two implementations 
> should reuse code as much as possible. 

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