Merge pull request kubernetes#125847 from knabben/increase-win-limit

Increasing limit margin to 8% on pod cpu limit test

Author: k8s-ci-robot

test/e2e/windows/cpu_limits.go

@@ -73,7 +73,7 @@ var _ = sigDescribe(feature.Windows, "Cpu Resources", framework.WithSerial(), sk
 				gomega.Expect(pod.Status.Phase).To(gomega.Equal(v1.PodRunning))
 				allPods = append(allPods, pod)
 			}
-			ginkgo.By("Ensuring cpu doesn't exceed limit by >5%")
+			ginkgo.By("Ensuring cpu doesn't exceed limit by >8%")
 			for _, p := range allPods {
 				ginkgo.By("Gathering node summary stats")
 				nodeStats, err := e2ekubelet.GetStatsSummary(ctx, f.ClientSet, p.Spec.NodeName)
@@ -95,8 +95,11 @@ var _ = sigDescribe(feature.Windows, "Cpu Resources", framework.WithSerial(), sk
 				if cpuUsage <= 0 {
 					framework.Failf("Pod %s/%s reported usage is %v, but it should be greater than 0", p.Namespace, p.Name, cpuUsage)
 				}
-				if cpuUsage >= .5*1.05 {
-					framework.Failf("Pod %s/%s reported usage is %v, but it should not exceed limit by > 5%%", p.Namespace, p.Name, cpuUsage)
+				// Jobs can potentially exceed the limit for a variety of reasons on Windows.
+				// Softening the limit margin to 8% and allow a occasional overload.
+				// https://github.com/kubernetes/kubernetes/issues/124643
+				if cpuUsage >= .8*1.05 {
+					framework.Failf("Pod %s/%s reported usage is %v, but it should not exceed limit by > 8%%", p.Namespace, p.Name, cpuUsage)
 				}
 			}
 		})