Merge pull request kubernetes#84437 from hex108/snapshot

Run snapshot before PreFilter plugins when schedule begins

Author: k8s-ci-robot

pkg/scheduler/core/generic_scheduler.go

@@ -183,13 +183,6 @@ func (g *genericScheduler) Schedule(ctx context.Context, state *framework.CycleS
 	}
 	trace.Step("Basic checks done")
 
-	// Run "prefilter" plugins.
-	preFilterStatus := g.framework.RunPreFilterPlugins(ctx, state, pod)
-	if !preFilterStatus.IsSuccess() {
-		return result, preFilterStatus.AsError()
-	}
-	trace.Step("Running prefilter plugins done")
-
 	if err := g.snapshot(); err != nil {
 		return result, err
 	}
@@ -199,6 +192,13 @@ func (g *genericScheduler) Schedule(ctx context.Context, state *framework.CycleS
 		return result, ErrNoNodesAvailable
 	}
 
+	// Run "prefilter" plugins.
+	preFilterStatus := g.framework.RunPreFilterPlugins(ctx, state, pod)
+	if !preFilterStatus.IsSuccess() {
+		return result, preFilterStatus.AsError()
+	}
+	trace.Step("Running prefilter plugins done")
+
 	startPredicateEvalTime := time.Now()
 	filteredNodes, failedPredicateMap, filteredNodesStatuses, err := g.findNodesThatFit(ctx, state, pod)
 	if err != nil {