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Posted to yarn-issues@hadoop.apache.org by "Daryn Sharp (JIRA)" <ji...@apache.org> on 2017/06/01 16:57:04 UTC

[jira] [Created] (YARN-6681) Eliminate double-copy of child queues in canAssignToThisQueue

Daryn Sharp created YARN-6681:
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             Summary: 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


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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