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Posted to yarn-issues@hadoop.apache.org by "Daryn Sharp (JIRA)" <ji...@apache.org> on 2017/06/01 17:24:04 UTC
[jira] [Updated] (YARN-6681) Eliminate double-copy of child queues
in canAssignToThisQueue
[ https://issues.apache.org/jira/browse/YARN-6681?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Daryn Sharp updated YARN-6681:
------------------------------
Attachment: YARN-6681.branch-2.patch
YARN-6681.trunk.patch
Add a {{hasChildQueues}} method that is overridden by {{ParentQueue}} to avoid the tree to list duplications.
> 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.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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