Add deletePodsOp to scheduler_perf

test/integration/scheduler_perf/config/performance-config.yaml

@@ -1333,7 +1333,13 @@
     # Create pods that will be gradually deleted after being scheduled.
   - opcode: createPods
     countParam: $deletingPods
+    # Delete scheduled pods, which will generate many AssignedPodDelete events.
+    # Each of them will be processed by the scheduling queue.
+    # But, the scheduling throughput should only be minimally impacted by the number of gated Pods.
+  - opcode: deletePods
+    namespace: namespace-3
     deletePodsPerSecond: 50
+    skipWaitToCompletion: true
   - opcode: createPods
     countParam: $measurePods
     collectMetrics: true
@@ -1402,7 +1408,10 @@
     countParam: $deletingPods
     podTemplatePath: config/templates/pod-with-finalizer.yaml
     skipWaitToCompletion: true
+  - opcode: deletePods
+    namespace: namespace-1
     deletePodsPerSecond: 100
+    skipWaitToCompletion: true
   - opcode: createPods
     countParam: $measurePods
     collectMetrics: true

test/integration/scheduler_perf/scheduler_perf.go

@@ -77,6 +77,7 @@ const (
 	createNamespacesOpcode     operationCode = "createNamespaces"
 	createPodsOpcode           operationCode = "createPods"
 	createPodSetsOpcode        operationCode = "createPodSets"
+	deletePodsOpcode           operationCode = "deletePods"
 	createResourceClaimsOpcode operationCode = "createResourceClaims"
 	createResourceDriverOpcode operationCode = "createResourceDriver"
 	churnOpcode                operationCode = "churn"
@@ -407,6 +408,7 @@ func (op *op) UnmarshalJSON(b []byte) error {
 		&createNamespacesOp{},
 		&createPodsOp{},
 		&createPodSetsOp{},
+		&deletePodsOp{},
 		&createResourceClaimsOp{},
 		&createResourceDriverOp{},
 		&churnOp{},
@@ -586,9 +588,6 @@ type createPodsOp struct {
 	// Optional
 	PersistentVolumeTemplatePath      *string
 	PersistentVolumeClaimTemplatePath *string
-	// Number of pods to be deleted per second after they were scheduled. If set to 0, pods are not deleted.
-	// Optional
-	DeletePodsPerSecond int
 }
 
 func (cpo *createPodsOp) isValid(allowParameterization bool) error {
@@ -604,9 +603,6 @@ func (cpo *createPodsOp) isValid(allowParameterization bool) error {
 		// use-cases right now.
 		return fmt.Errorf("collectMetrics and skipWaitToCompletion cannot be true at the same time")
 	}
-	if cpo.DeletePodsPerSecond < 0 {
-		return fmt.Errorf("invalid DeletePodsPerSecond=%d; should be non-negative", cpo.DeletePodsPerSecond)
-	}
 	return nil
 }
 
@@ -665,6 +661,46 @@ func (cpso createPodSetsOp) patchParams(w *workload) (realOp, error) {
 	return &cpso, (&cpso).isValid(true)
 }
 
+// deletePodsOp defines an op where previously created pods are deleted.
+// The test can block on the completion of this op before moving forward or
+// continue asynchronously.
+type deletePodsOp struct {
+	// Must be "deletePods".
+	Opcode operationCode
+	// Namespace the pods should be deleted from.
+	Namespace string
+	// Labels used to filter the pods to delete.
+	// If empty, it will delete all Pods in the namespace.
+	// Optional.
+	LabelSelector map[string]string
+	// Whether or not to wait for all pods in this op to be deleted.
+	// Defaults to false if not specified.
+	// Optional
+	SkipWaitToCompletion bool
+	// Number of pods to be deleted per second.
+	// If zero, all pods are deleted at once.
+	// Optional
+	DeletePodsPerSecond int
+}
+
+func (dpo *deletePodsOp) isValid(allowParameterization bool) error {
+	if dpo.Opcode != deletePodsOpcode {
+		return fmt.Errorf("invalid opcode %q; expected %q", dpo.Opcode, deletePodsOpcode)
+	}
+	if dpo.DeletePodsPerSecond < 0 {
+		return fmt.Errorf("invalid DeletePodsPerSecond=%d; should be non-negative", dpo.DeletePodsPerSecond)
+	}
+	return nil
+}
+
+func (dpo *deletePodsOp) collectsMetrics() bool {
+	return false
+}
+
+func (dpo deletePodsOp) patchParams(w *workload) (realOp, error) {
+	return &dpo, nil
+}
+
 // churnOp defines an op where services are created as a part of a workload.
 type churnOp struct {
 	// Must be "churnOp".
@@ -1227,32 +1263,53 @@ func runWorkload(tCtx ktesting.TContext, tc *testCase, w *workload, informerFact
 				mu.Unlock()
 			}
 
-			if concreteOp.DeletePodsPerSecond > 0 {
-				pods, err := podInformer.Lister().Pods(namespace).List(labels.Everything())
-				if err != nil {
-					tCtx.Fatalf("op %d: error in listing scheduled pods in the namespace: %v", opIndex, err)
-				}
+		case *deletePodsOp:
+			labelSelector := labels.ValidatedSetSelector(concreteOp.LabelSelector)
 
-				ticker := time.NewTicker(time.Second / time.Duration(concreteOp.DeletePodsPerSecond))
-				defer ticker.Stop()
+			podsToDelete, err := podInformer.Lister().Pods(concreteOp.Namespace).List(labelSelector)
+			if err != nil {
+				tCtx.Fatalf("op %d: error in listing pods in the namespace %s: %v", opIndex, concreteOp.Namespace, err)
+			}
 
-				wg.Add(1)
-				go func(opIndex int) {
-					defer wg.Done()
-					for i := 0; i < len(pods); i++ {
+			deletePods := func(opIndex int) {
+				if concreteOp.DeletePodsPerSecond > 0 {
+					ticker := time.NewTicker(time.Second / time.Duration(concreteOp.DeletePodsPerSecond))
+					defer ticker.Stop()
+
+					for i := 0; i < len(podsToDelete); i++ {
 						select {
 						case <-ticker.C:
-							if err := tCtx.Client().CoreV1().Pods(namespace).Delete(tCtx, pods[i].Name, metav1.DeleteOptions{}); err != nil {
+							if err := tCtx.Client().CoreV1().Pods(concreteOp.Namespace).Delete(tCtx, podsToDelete[i].Name, metav1.DeleteOptions{}); err != nil {
 								if errors.Is(err, context.Canceled) {
 									return
 								}
-								tCtx.Errorf("op %d: unable to delete pod %v: %v", opIndex, pods[i].Name, err)
+								tCtx.Errorf("op %d: unable to delete pod %v: %v", opIndex, podsToDelete[i].Name, err)
 							}
 						case <-tCtx.Done():
 							return
 						}
 					}
+					return
+				}
+				listOpts := metav1.ListOptions{
+					LabelSelector: labelSelector.String(),
+				}
+				if err := tCtx.Client().CoreV1().Pods(concreteOp.Namespace).DeleteCollection(tCtx, metav1.DeleteOptions{}, listOpts); err != nil {
+					if errors.Is(err, context.Canceled) {
+						return
+					}
+					tCtx.Errorf("op %d: unable to delete pods in namespace %v: %v", opIndex, concreteOp.Namespace, err)
+				}
+			}
+
+			if concreteOp.SkipWaitToCompletion {
+				wg.Add(1)
+				go func(opIndex int) {
+					defer wg.Done()
+					deletePods(opIndex)
 				}(opIndex)
+			} else {
+				deletePods(opIndex)
 			}
 
 		case *churnOp: