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Posted to dev@qpid.apache.org by "Ken Giusti (Jira)" <ji...@apache.org> on 2021/08/24 00:56:00 UTC

[jira] [Created] (DISPATCH-2238) Avoid holding the core action lock when waking the core thread

Ken Giusti created DISPATCH-2238:
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             Summary: Avoid holding the core action lock when waking the core thread
                 Key: DISPATCH-2238
                 URL: https://issues.apache.org/jira/browse/DISPATCH-2238
             Project: Qpid Dispatch
          Issue Type: Improvement
          Components: Router Node
    Affects Versions: 1.17.0
            Reporter: Ken Giusti
            Assignee: Ken Giusti
             Fix For: 1.18.0


Currently when an action is queued for the core to process, the queuing code calls pthread_cond_signal() while holding the associated mutex.  This can cause the core thread to be woken then immediately put sleep while taking the mutex.

 

It is legal to call pthread_cond_signal() without holding the lock. Doing this will avoid contention on the associated mutex.



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