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Introduce scheduler CPU/Memory profile-gathering in density test

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This commit is contained in:
Shyam Jeedigunta 2018-06-21 20:53:19 +02:00
parent 457548ef7d
commit 0c787703f5
1 changed files with 14 additions and 1 deletions
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15
test/e2e/scalability/density.go
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@ -64,6 +64,9 @@ var MaxContainerFailures = 0
// Maximum no. of missing measurements related to pod-startup that the test tolerates.
var MaxMissingPodStartupMeasurements = 0
// Number of nodes in the cluster (computed inside BeforeEach).
var nodeCount = 0
type DensityTestConfig struct {
Configs []testutils.RunObjectConfig
ClientSets []clientset.Interface
@ -285,6 +288,11 @@ func runDensityTest(dtc DensityTestConfig, testPhaseDurations *timer.TestPhaseTi
replicationCtrlStartupPhase := testPhaseDurations.StartPhase(300, "saturation pods creation")
defer replicationCtrlStartupPhase.End()
// Start scheduler CPU profile-gatherer before we begin cluster saturation.
profileGatheringDelay := time.Duration(1+nodeCount/100) * time.Minute
schedulerProfilingStopCh := framework.StartCPUProfileGatherer("kube-scheduler", "density", profileGatheringDelay)
// Start all replication controllers.
startTime := time.Now()
wg := sync.WaitGroup{}
@ -304,10 +312,16 @@ func runDensityTest(dtc DensityTestConfig, testPhaseDurations *timer.TestPhaseTi
wg.Wait()
startupTime := time.Since(startTime)
close(logStopCh)
close(schedulerProfilingStopCh)
framework.Logf("E2E startup time for %d pods: %v", dtc.PodCount, startupTime)
framework.Logf("Throughput (pods/s) during cluster saturation phase: %v", float32(dtc.PodCount)/float32(startupTime/time.Second))
replicationCtrlStartupPhase.End()
// Grabbing scheduler memory profile after cluster saturation finished.
wg.Add(1)
framework.GatherMemoryProfile("kube-scheduler", "density", &wg)
wg.Wait()
printPodAllocationPhase := testPhaseDurations.StartPhase(400, "printing pod allocation")
defer printPodAllocationPhase.End()
// Print some data about Pod to Node allocation
@ -366,7 +380,6 @@ func cleanupDensityTest(dtc DensityTestConfig, testPhaseDurations *timer.TestPha
// limits on Docker's concurrent container startup.
var _ = SIGDescribe("Density", func() {
var c clientset.Interface
var nodeCount int
var additionalPodsPrefix string
var ns string
var uuid string