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https://issues.apache.org/jira/browse/YARN-6681?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daryn Sharp updated YARN-6681:
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Attachment: YARN-6681.branch-2.patch
YARN-6681.branch-2.8.patch
The branch-2 patch was really branch-2.8. All 3 patches are just context.
> Eliminate double-copy of child queues in canAssignToThisQueue
> -------------------------------------------------------------
>
> Key: YARN-6681
> URL: https://issues.apache.org/jira/browse/YARN-6681
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Affects Versions: 2.8.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Attachments: YARN-6681.branch-2.8.patch, YARN-6681.branch-2.patch,
> YARN-6681.trunk.patch
>
>
> 20% of the time in {{AbstractCSQueue#canAssignToThisQueue}} is spent
> performing two duplications a treemap of child queues into a list - once to
> test for null, second to see if it's empty. Eliminating the dups reduces the
> overhead to 2%.
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