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https://issues.apache.org/jira/browse/TS-3044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14157141#comment-14157141
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ASF subversion and git services commented on TS-3044:
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Commit 86295176ccb5b7ef5c96686b398733e1edf6f2ee in trafficserver's branch
refs/heads/master from [~jplevyak]
[ https://git-wip-us.apache.org/repos/asf?p=trafficserver.git;h=8629517 ]
TS-3044: Use eventfd in AIO_MODE_NATIVE if available
> linux native AIO should use eventfd if available to signal thread
> -----------------------------------------------------------------
>
> Key: TS-3044
> URL: https://issues.apache.org/jira/browse/TS-3044
> Project: Traffic Server
> Issue Type: Improvement
> Components: Cache
> Reporter: John Plevyak
> Assignee: Phil Sorber
> Fix For: 5.2.0
>
> Attachments: native-aio-eventfd.patch
>
>
> linux native AIO has the ability to signal the event thread to get off the
> poll and service the disk via the io_set_eventfd() call. linux native AIO
> scales better than the thread-based IO, but the current implementation can
> introduce delays on lightly loaded systems because of the thread is waiting
> on epoll(). This can be remedied by using io_set_eventfd
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