Buckets:        metrics.ExponentialBuckets(0.001, 2, 15),
			StabilityLevel: metrics.ALPHA,
		},
	)
	PreemptionVictims = metrics.NewHistogram(
		&metrics.HistogramOpts{
			Subsystem: SchedulerSubsystem,
			Name:      "preemption_victims",
			Help:      "Number of selected preemption victims",
			// we think #victims>64 is pretty rare, therefore [64, +Inf) is considered a single bucket.

	}

	fh.Parallelizer().Until(ctx, len(c.Victims().Pods), preemptPod, ev.PluginName)
	if err := errCh.ReceiveError(); err != nil {
		return framework.AsStatus(err)
	}

	metrics.PreemptionVictims.Observe(float64(len(c.Victims().Pods)))

	// Lower priority pods nominated to run on this node, may no longer fit on
	// this node. So, we should remove their nomination. Removing their