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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (QPIDJMS-430) Lock-Free FifoMessageQueue
Date Fri, 11 Jan 2019 17:54:00 GMT

    [ https://issues.apache.org/jira/browse/QPIDJMS-430?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16740593#comment-16740593

ASF GitHub Bot commented on QPIDJMS-430:

franz1981 commented on issue #26: QPIDJMS-430 Lock-Free FifoMessageQueue
URL: https://github.com/apache/qpid-jms/pull/26#issuecomment-453601630
   @tabish121 I haven't had the chance to measure the gains now that https://github.com/apache/activemq-artemis/pull/2467
has been merged and sadly I don't have such a fast box ATM, but I would try it and see if
it can make any difference. 
   I can surely avoid the padding even if it will lower the performance, given that it would
be anyway better then the orignal version, that was locked.
   @gemmellr @tabish121 My only worry is that the original version were having a resizable
backlog of messages while this version is quite strict and never grows exceeding a configured
capacity ie `prefetchSize`, I hope it is not a limitation, given that it would (yield)wait
on offer side until one slot became available.
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> Lock-Free FifoMessageQueue
> --------------------------
>                 Key: QPIDJMS-430
>                 URL: https://issues.apache.org/jira/browse/QPIDJMS-430
>             Project: Qpid JMS
>          Issue Type: Improvement
>            Reporter: Francesco Nigro
>            Priority: Minor
> A lock-free single producer multi consumer double ended queue would allow for the common
cases (enqueue/dequeue) to benefit from a better throughput and lower latencies while allowing
busy spin waits to benefits from some additional boost

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