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https://issues.apache.org/jira/browse/TS-1760?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13621157#comment-13621157
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John Plevyak commented on TS-1760:
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This patch seems to have a latency issues and a busy wait issue. The timeout
on io_getevents is 4msec which is below the threshold on some systems for busy
waiting which is often 10msec. Second, it queues the events onto a handler in
the same thread rather than doing the io_submit itself. Third, if the handler
which calls io_getevents on an EThread, there is already another call to
epoll() which is blocking the same thread. Having two calls on the same thread
blocking the thread is not a good idea: they will conflict with one blocking
while the other has ready data (i.e. from the net or from the disk).
If io_submit is thread safe while there is an currently waiting io_getevents on
another thread, then linux aio might be viable for traffic server. If
io_getevents played well with epoll() then linux aio might be viable. Really,
to get this to work Linux would need to have an integrated async completion API.
> use linux native aio
> --------------------
>
> Key: TS-1760
> URL: https://issues.apache.org/jira/browse/TS-1760
> Project: Traffic Server
> Issue Type: Improvement
> Components: Core
> Reporter: weijin
> Assignee: weijin
> Fix For: 3.3.2
>
> Attachments: native_aio.patch
>
>
> add a feature that use linux native aio
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