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Posted to issues@flink.apache.org by "Piotr Nowojski (Jira)" <ji...@apache.org> on 2019/11/13 15:16:00 UTC

[jira] [Assigned] (FLINK-14747) Performance regression with latest changes to Mailbox

     [ https://issues.apache.org/jira/browse/FLINK-14747?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Piotr Nowojski reassigned FLINK-14747:
--------------------------------------

    Assignee: Arvid Heise

> Performance regression with latest changes to Mailbox
> -----------------------------------------------------
>
>                 Key: FLINK-14747
>                 URL: https://issues.apache.org/jira/browse/FLINK-14747
>             Project: Flink
>          Issue Type: Bug
>            Reporter: Arvid Heise
>            Assignee: Arvid Heise
>            Priority: Major
>
> The commits [edeec8d7420185d1c49b2739827bd921d2c2d485|https://github.com/apache/flink/commit/edeec8d7420185d1c49b2739827bd921d2c2d485] .. [809533e5b5c686e2d21b64361d22178ccb92ec26|https://github.com/apache/flink/commit/809533e5b5c686e2d21b64361d22178ccb92ec26] introduced a performance regression in the course of FLINK-14304 .
> The root cause seems to be the removal of the volatile variable for speed up the hotpath in case of an empty mailbox queue resulting in unnecessary lock acquisitions.



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