[jira] Commented: (HARMONY-4014) [drlvm][thread]100% CPU consumption in MONITORENTER

["Vasily Zakharov (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HARMONY-4014?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12563157#action_12563157 ] 

Vasily Zakharov commented on HARMONY-4014:
------------------------------------------

Pavel,

Thanks you very much, this workaround patch shows this problem is also the cause of 100% CPU consumption in Geronimo.


> [drlvm][thread]100% CPU consumption in MONITORENTER
> ---------------------------------------------------
>
>                 Key: HARMONY-4014
>                 URL: https://issues.apache.org/jira/browse/HARMONY-4014
>             Project: Harmony
>          Issue Type: Bug
>          Components: DRLVM
>            Reporter: Sergey Salishev
>            Assignee: weldon washburn
>            Priority: Minor
>         Attachments: H-4014-workaround.patch, Test.java
>
>
> The attached test eats 100% of cpu time on Harmony while on RI it's 0% as it's blocked in IO op.
> This is caused by busy wait in monitor enter  when trying to inflate thin lock which is held by thread blocked in OS from other thread.

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