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This commit is contained in:
Sergiusz Urbaniak 2020-12-14 12:43:28 +01:00
parent 269295a414
commit 9f0440be0f
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669 changed files with 58447 additions and 20021 deletions
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18
vendor/k8s.io/apiserver/pkg/util/flowcontrol/fairqueuing/queueset/queueset.go generated vendored
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@ -645,6 +645,7 @@ func (qs *queueSet) selectQueueLocked() *queue {
qs.robinIndex = (qs.robinIndex + 1) % nq
queue := qs.queues[qs.robinIndex]
if len(queue.requests) != 0 {
currentVirtualFinish := queue.GetVirtualFinish(0, qs.estimatedServiceTime)
if currentVirtualFinish < minVirtualFinish {
minVirtualFinish = currentVirtualFinish
@ -657,6 +658,23 @@ func (qs *queueSet) selectQueueLocked() *queue {
// for the next round. This way the non-selected queues
// win in the case that the virtual finish times are the same
qs.robinIndex = minIndex
// according to the original FQ formula:
//
// Si = MAX(R(t), Fi-1)
//
// the virtual start (excluding the estimated cost) of the chose
// queue should always be greater or equal to the global virtual
// time.
//
// hence we're refreshing the per-queue virtual time for the chosen
// queue here. if the last virtual start time (excluded estimated cost)
// falls behind the global virtual time, we update the latest virtual
// start by: <latest global virtual time> + <previously estimated cost>
previouslyEstimatedServiceTime := float64(minQueue.requestsExecuting) * qs.estimatedServiceTime
if qs.virtualTime > minQueue.virtualStart-previouslyEstimatedServiceTime {
// per-queue virtual time should not fall behind the global
minQueue.virtualStart = qs.virtualTime + previouslyEstimatedServiceTime
}
return minQueue
}