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Opened 16 years ago

Closed 16 years ago

Last modified 14 years ago

#199 closed defect (done)

ThreadPool contention in the JobManager

Reported by: gkronber Owned by: gkronber
Priority: medium Milestone: HeuristicLab 3.3.0
Component: ZZZ OBSOLETE: Grid Version: 3.1
Keywords: Cc:


JobManager queues a thread-pool WaitCallback to collect. In combination with the rather coarse-grained locking the result-collection method it seems that this causes a contention problem leading to starvation and connection-timeouts.

Possible fix: Manage the running engines in a queue and use producer/consumer scheme.

Change History (5)

comment:1 Changed 16 years ago by gkronber

  • Status changed from new to assigned

comment:2 Changed 16 years ago by gkronber

  • Resolution set to fixed
  • Status changed from assigned to closed

fixed with r386 by introducing to queues for waiting and running engines. New entries are added to the waitingQueue with BeginExecuteOperation the first thread consumes from the waitingQueue sends the engine to the grid-server for processing and adds an entry to the runningQueue. The second thread consumes from the runningQueue and gathers results from the server.

comment:3 Changed 15 years ago by swagner

  • Milestone changed from 3.1 to Iteration 0

Milestone 3.1 deleted

comment:4 Changed 14 years ago by swagner

  • Milestone changed from Iteration 0 to Current

Milestone Iteration 0 deleted

comment:11 Changed 14 years ago by swagner

  • Milestone changed from Current to HeuristicLab 3.3.0

Milestone Current deleted

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