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https://issues.apache.org/jira/browse/YARN-3122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15184992#comment-15184992
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Naganarasimha G R commented on YARN-3122:
-----------------------------------------
Hi [~adhoot] & [~kasha],
I had one query over here wrt milliVcoresUsed calculation
{code}
int milliVcoresUsed = (int) (cpuUsageTotalCoresPercentage * 1000
* maxVCoresAllottedForContainers /nodeCpuPercentageForYARN);
{code}
*maxVCoresAllottedForContainers* is calculated from
*NodeManagerHardwareUtils.getVCores* -> *NodeManagerHardwareUtils.getVCores*
gets physical cores from *NodeManagerHardwareUtils.getContainersCPUs* and here
we are returning
{code}
int numProcessors = getNodeCPUs(plugin, conf);
int nodeCpuPercentage = getNodeCpuPercentage(conf);
return (nodeCpuPercentage * numProcessors) / 100.0f;
{code}
so effectively milliVcoresUsed cancelling nodeCpuPercentage which was earlier
evaluated, Please correct if my understanding is wrong.
> 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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