[jira] [Updated] (YARN-7397) Reduce lock contention in FairScheduler#getAppWeight()

["Daniel Templeton (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-7397?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Daniel Templeton updated YARN-7397:
-----------------------------------
    Attachment: YARN-7397.001.patch

My testing shows about a 5% performance improvement from this patch.

> Reduce lock contention in FairScheduler#getAppWeight()
> ------------------------------------------------------
>
>                 Key: YARN-7397
>                 URL: https://issues.apache.org/jira/browse/YARN-7397
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: fairscheduler
>    Affects Versions: 3.0.0-beta1
>            Reporter: Daniel Templeton
>            Assignee: Daniel Templeton
>         Attachments: YARN-7397.001.patch
>
>
> In profiling the fair scheduler, a large amount of time is spent waiting to get the lock in {{FairScheduler.getAppWeight()}}, when the lock isn't actually needed.  This patch reduces the scope of the lock to eliminate that contention.



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

---------------------------------------------------------------------
To unsubscribe, e-mail: yarn-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: yarn-issues-help@hadoop.apache.org