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[SPARK-17304] Fix perf. issue caused by TaskSetManager.abortIfCompletelyBlacklisted #14871

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[SPARK-17304] Fix perf. issue caused by TaskSetManager.abortIfCompletelyBlacklisted #14871

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f51111c
Bail out of loop early if no CPUs are available.
JoshRosen Aug 29, 2016
5d20b44
Move abort logic out of inner loop.
JoshRosen Aug 30, 2016
321d0c6
Rename variables
JoshRosen Aug 30, 2016
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22 changes: 13 additions & 9 deletions core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -278,9 +278,6 @@ private[spark] class TaskSchedulerImpl(
}
}
}
if (!launchedTask) {
taskSet.abortIfCompletelyBlacklisted(executorIdToHost.keys)
}
return launchedTask
}

Expand Down Expand Up @@ -326,12 +323,19 @@ private[spark] class TaskSchedulerImpl(
// Take each TaskSet in our scheduling order, and then offer it each node in increasing order
// of locality levels so that it gets a chance to launch local tasks on all of them.
// NOTE: the preferredLocality order: PROCESS_LOCAL, NODE_LOCAL, NO_PREF, RACK_LOCAL, ANY
var launchedTask = false
for (taskSet <- sortedTaskSets; maxLocality <- taskSet.myLocalityLevels) {
do {
launchedTask = resourceOfferSingleTaskSet(
taskSet, maxLocality, shuffledOffers, availableCpus, tasks)
} while (launchedTask)
for (taskSet <- sortedTaskSets) {
var launchedAnyTask = false
var launchedTaskAtCurrentMaxLocality = false
for (currentMaxLocality <- taskSet.myLocalityLevels) {
do {
launchedTaskAtCurrentMaxLocality = resourceOfferSingleTaskSet(
taskSet, currentMaxLocality, shuffledOffers, availableCpus, tasks)
launchedAnyTask |= launchedTaskAtCurrentMaxLocality
} while (launchedTaskAtCurrentMaxLocality)
}
if (!launchedAnyTask) {
taskSet.abortIfCompletelyBlacklisted(executorIdToHost.keys)
}
}

if (tasks.size > 0) {
Expand Down