func GetClockSpeed()

in machine/machine.go [102:133]

26 lines of code
12 McCabe index (conditional complexity)


func GetClockSpeed(procInfo []byte) (uint64, error) {
	// First look through sys to find a max supported cpu frequency.
	if utils.FileExists(maxFreqFile) {
		val, err := os.ReadFile(maxFreqFile)
		if err != nil {
			return 0, err
		}
		var maxFreq uint64
		n, err := fmt.Sscanf(string(val), "%d", &maxFreq)
		if err != nil || n != 1 {
			return 0, fmt.Errorf("could not parse frequency %q", val)
		}
		return maxFreq, nil
	}
	// s390/s390x, mips64, riscv64, aarch64 and arm32 changes
	if isMips64() || isSystemZ() || isAArch64() || isArm32() || isRiscv64() {
		return 0, nil
	}

	// Fall back to /proc/cpuinfo
	matches := cpuClockSpeedMHz.FindSubmatch(procInfo)
	if len(matches) != 2 {
		return 0, fmt.Errorf("could not detect clock speed from output: %q", string(procInfo))
	}

	speed, err := strconv.ParseFloat(string(matches[1]), 64)
	if err != nil {
		return 0, err
	}
	// Convert to kHz
	return uint64(speed * 1000), nil
}