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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2021/07/08 18:00:42 UTC

[GitHub] [arrow-datafusion] Dandandan opened a new pull request #698: Avoid sleeping between tasks

Dandandan opened a new pull request #698:
URL: https://github.com/apache/arrow-datafusion/pull/698


   # Which issue does this PR close?
   Closes #697
   
    # Rationale for this change
   <!--
    Why are you proposing this change? If this is already explained clearly in the issue then this section is not needed.
    Explaining clearly why changes are proposed helps reviewers understand your changes and offer better suggestions for fixes.  
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   Currently, when polling for work, the executor always waits 250 ms in between polling for tasks.
   This means if the tasks themselves are small, it can be unproductive for a large percent of the time.
   
   We can track whether we received tasks in the last iterations to avoid sleeping.
   
   Also a slightly lower sleep time (e.g. 100ms) can help reduce the initial delay.
   
   
   # What changes are included in this PR?
   <!--
   There is no need to duplicate the description in the issue here but it is sometimes worth providing a summary of the individual changes in this PR.
   -->
   
   Keep track of whether we received some tasks last time. If it's the case we don't sleep, otherwise we do.
   
   Also reduce hard-coded 250 to 100ms to reduce initial delay a bit.
   
   # Are there any user-facing changes?
   <!--
   If there are user-facing changes then we may require documentation to be updated before approving the PR.
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   <!--
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[GitHub] [arrow-datafusion] Dandandan merged pull request #698: Ballista: Avoid sleeping between polling for tasks

Posted by GitBox <gi...@apache.org>.
Dandandan merged pull request #698:
URL: https://github.com/apache/arrow-datafusion/pull/698


   


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