cgroups/fs/utils.go
func getCgroupParamUint(cgroupPath, cgroupFile string) (uint64, error) {
	contents, err := ioutil.ReadFile(filepath.Join(cgroupPath, cgroupFile))
	if err != nil {
		return 0, err
	}

	return parseUint(strings.TrimSpace(string(contents)), 10, 64)
}
func getCgroupParamUint(cgroupPath, cgroupFile string) (uint64, error) {
	contents, err := ioutil.ReadFile(filepath.Join(cgroupPath, cgroupFile))
	if err != nil {
		return 0, err
	}

	return parseUint(strings.TrimSpace(string(contents)), 10, 64)
}
// Gets a single uint64 value from the specified cgroup file.