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https://issues.apache.org/jira/browse/DISPATCH-522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15511966#comment-15511966
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ASF subversion and git services commented on DISPATCH-522:
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Commit 152185eb91d58a924f982191bdf95d954199c47c in qpid-dispatch's branch
refs/heads/master from [~tr...@redhat.com]
[ https://git-wip-us.apache.org/repos/asf?p=qpid-dispatch.git;h=152185e ]
DISPATCH-522 - Reduce the number of times the core thread invokes connection
activation during times of high traffic volume.
> Performance: Defer activation and driver-awakening
> --------------------------------------------------
>
> Key: DISPATCH-522
> URL: https://issues.apache.org/jira/browse/DISPATCH-522
> Project: Qpid Dispatch
> Issue Type: Improvement
> Components: Router Node
> Reporter: Ted Ross
> Assignee: Ted Ross
> Fix For: 0.7.0
>
>
> The router-core thread processes batches of actions (the size of the action
> list) when it begins its main loop. When there is a large volume of traffic,
> these batches can be quite large (over 1000 actions has been observed). It
> is likely that the large batches are settlement or disposition updates of
> ranges of deliveries which Proton serializes into individual events.
> Each settlement action results in a connection activation. This means that
> for large batches, the same connection may be activated hundreds of times
> during the processing of a single batch of actions.
> This improvement makes two significant changes:
> - It defers the activations until after the processing of a batch, such that
> each affected connection is only activated once.
> - It holds off the awakening of the driver's poll loop until it has
> activated all of the connections.
> This will result in far fewer calls into the driver by the core thread during
> times of high traffic volume.
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