Github user wangmiao1981 commented on a diff in the pull request:
https://github.com/apache/spark/pull/15218#discussion_r83963294
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala ---
@@ -250,24 +263,26 @@ private[spark] class TaskSchedulerImpl(
private def resourceOfferSingleTaskSet(
taskSet: TaskSetManager,
maxLocality: TaskLocality,
- shuffledOffers: Seq[WorkerOffer],
- availableCpus: Array[Int],
- tasks: IndexedSeq[ArrayBuffer[TaskDescription]]) : Boolean = {
+ taskAssigner: TaskAssigner) : Boolean = {
var launchedTask = false
- for (i <- 0 until shuffledOffers.size) {
- val execId = shuffledOffers(i).executorId
- val host = shuffledOffers(i).host
- if (availableCpus(i) >= CPUS_PER_TASK) {
+ taskAssigner.init()
+ while(taskAssigner.hasNext()) {
+ var assigned = false
+ val current = taskAssigner.getNext()
+ val execId = current.workOffer.executorId
+ val host = current.workOffer.host
+ if (current.cores >= CPUS_PER_TASK) {
try {
for (task <- taskSet.resourceOffer(execId, host, maxLocality)) {
- tasks(i) += task
+ current.tasks += task
val tid = task.taskId
taskIdToTaskSetManager(tid) = taskSet
taskIdToExecutorId(tid) = execId
executorIdToTaskCount(execId) += 1
- availableCpus(i) -= CPUS_PER_TASK
- assert(availableCpus(i) >= 0)
+ current.cores = current.cores - CPUS_PER_TASK
--- End diff --
Do you want to follow the previous style `current.cores -= CPUS_PER_TASK`
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