statsCalculator.calcAndStoreStats()
	vs, _ := statsCalculator.GetLatest()

	assert.Len(t, append(vs.EphemeralVolumes, vs.PersistentVolumes...), 4)
	// Verify 'vol0' doesn't have a PVC reference
	assert.Contains(t, append(vs.EphemeralVolumes, vs.PersistentVolumes...), kubestats.VolumeStats{
		Name:              vol0,
		FsStats:           expectedFSStats(),

func (o *EphemeralVolumeControllerOptions) AddFlags(fs *pflag.FlagSet) {
	if o == nil {
		return
	}

	fs.Int32Var(&o.ConcurrentEphemeralVolumeSyncs, "concurrent-ephemeralvolume-syncs", o.ConcurrentEphemeralVolumeSyncs, "The number of ephemeral volume syncing operations that will be done concurrently. Larger number = faster ephemeral volume updating, but more CPU (and network) load")
}

			Help:           "Number of PersistenVolumeClaims creation requests",
			StabilityLevel: metrics.ALPHA,
		})
)

var registerMetrics sync.Once

// RegisterMetrics registers EphemeralVolume metrics.
func RegisterMetrics() {
	registerMetrics.Do(func() {
		legacyregistry.MustRegister(EphemeralVolumeCreateAttempts)
		legacyregistry.MustRegister(EphemeralVolumeCreateFailures)
	})

}

// PodVolumeStats encapsulates the VolumeStats for a pod.
// It consists of two lists, for local ephemeral volumes, and for persistent volumes respectively.
type PodVolumeStats struct {
	EphemeralVolumes  []stats.VolumeStats
	PersistentVolumes []stats.VolumeStats
}

// newVolumeStatCalculator creates a new VolumeStatCalculator