type containerStatsProvider interface {
	ListPodStats(ctx context.Context) ([]statsapi.PodStats, error)
	ListPodStatsAndUpdateCPUNanoCoreUsage(ctx context.Context) ([]statsapi.PodStats, error)
	ListPodCPUAndMemoryStats(ctx context.Context) ([]statsapi.PodStats, error)
	ImageFsStats(ctx context.Context) (*statsapi.FsStats, *statsapi.FsStats, error)
	ImageFsDevice(ctx context.Context) (string, error)
}

	rootStats, err := sp.provider.GetCgroupCPUAndMemoryStats("/", false)
	if err != nil {
		return nil, fmt.Errorf("failed to get root cgroup stats: %v", err)
	}

	podStats, err := sp.provider.ListPodCPUAndMemoryStats(ctx)
	if err != nil {
		return nil, fmt.Errorf("failed to list pod stats: %v", err)
	}

	nodeStats := statsapi.NodeStats{
		NodeName:         node.Name,
		CPU:              rootStats.CPU,

	ListPodStats(ctx context.Context) ([]statsapi.PodStats, error)
	// ListPodStatsAndUpdateCPUNanoCoreUsage updates the cpu nano core usage for
	// the containers and returns the stats for all the pod-managed containers.
	ListPodCPUAndMemoryStats(ctx context.Context) ([]statsapi.PodStats, error)
	// ListPodStatsAndUpdateCPUNanoCoreUsage returns the stats of all the
	// containers managed by pods and force update the cpu usageNanoCores.