func (p *Provider) RlimitStats() (*statsapi.RlimitStats, error) {
	return pidlimit.Stats()
}

// GetCgroupStats returns the stats of the cgroup with the cgroupName. Note that
// this function doesn't generate filesystem stats.
func (p *Provider) GetCgroupStats(cgroupName string, updateStats bool) (*statsapi.ContainerStats, *statsapi.NetworkStats, error) {

	ImageFsStats(ctx context.Context) (imageFs *statsapi.FsStats, containerFs *statsapi.FsStats, callErr error)
	// The following stats are provided by cAdvisor.
	//
	// GetCgroupStats returns the stats and the networking usage of the cgroup
	// with the specified cgroupName.
	GetCgroupStats(cgroupName string, updateStats bool) (*statsapi.ContainerStats, *statsapi.NetworkStats, error)

	mockStatsProvider.EXPECT().RootFsStats().Return(rootFsStats, nil).AnyTimes()
	mockStatsProvider.EXPECT().RlimitStats().Return(nil, nil).AnyTimes()
	mockStatsProvider.EXPECT().GetCgroupStats("/", true).Return(cgroupStatsMap["/"].cs, cgroupStatsMap["/"].ns, nil).AnyTimes()

	kubeletCreationTime := metav1.Now()
	systemBootTime := metav1.Now()

	node, err := sp.provider.GetNode()
	if err != nil {
		return nil, fmt.Errorf("failed to get node info: %v", err)
	}
	nodeConfig := sp.provider.GetNodeConfig()
	rootStats, networkStats, err := sp.provider.GetCgroupStats("/", updateStats)
	if err != nil {
		return nil, fmt.Errorf("failed to get root cgroup stats: %v", err)
	}
	rootFsStats, err := sp.provider.RootFsStats()
	if err != nil {