15.2.4. time コマンドを使用した読み取りクロックのコストの比較

TSC:
	~]# time ./clock_timing_monotonic

	real	0m0.567s
	user	0m0.559s
	sys	0m0.002s

	~]# time ./clock_timing_monotonic_coarse

	real	0m0.120s
	user	0m0.118s
	sys	0m0.001s

HPET:
	~]# time ./clock_timing_monotonic

	real	0m12.257s
	user	0m12.179s
	sys	0m0.002s

	~]# time ./clock_timing_monotonic_coarse

	real	0m0.119s
	user	0m0.118s
	sys	0m0.000s

ACPI_PM:
	~]# time ./clock_timing_monotonic

	real	0m25.524s
	user	0m0.451s
	sys	0m24.932s

	~]# time ./clock_timing_monotonic_coarse

	real	0m0.119s
	user	0m0.117s
	sys	0m0.001s

TSC:
	~]# time ./clock_timing_monotonic

	real	0m0.567s
	user	0m0.559s
	sys	0m0.002s

	~]# time ./clock_timing_monotonic_coarse

	real	0m0.120s
	user	0m0.118s
	sys	0m0.001s

HPET:
	~]# time ./clock_timing_monotonic

	real	0m12.257s
	user	0m12.179s
	sys	0m0.002s

	~]# time ./clock_timing_monotonic_coarse

	real	0m0.119s
	user	0m0.118s
	sys	0m0.000s

ACPI_PM:
	~]# time ./clock_timing_monotonic

	real	0m25.524s
	user	0m0.451s
	sys	0m24.932s

	~]# time ./clock_timing_monotonic_coarse

	real	0m0.119s
	user	0m0.117s
	sys	0m0.001s