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Naganarasimha G R commented on YARN-6680: ----------------------------------------- [~daryn], I am kind of +0 on this, so i would wait for another +1 to go ahead on this . bq. Cloning the resource would be very bad. Resource object allocation overhead is already very high. Well i was referring to not on the read part but on the write/modification part. > Avoid locking overhead for NO_LABEL lookups > ------------------------------------------- > > Key: YARN-6680 > URL: https://issues.apache.org/jira/browse/YARN-6680 > Project: Hadoop YARN > Issue Type: Sub-task > Components: resourcemanager > Affects Versions: 2.8.0 > Reporter: Daryn Sharp > Assignee: Daryn Sharp > Attachments: YARN-6680.patch > > > Labels are managed via a hash that is protected with a read lock. The lock > acquire and release are each just as expensive as the hash lookup itself - > resulting in a 3X slowdown. -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org