https://github.com/torvalds/linux
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Tip revision: 8005c49d9aea74d382f474ce11afbbc7d7130bec authored by Linus Torvalds on 16 November 2015, 01:00:27 UTC
Linux 4.4-rc1
Tip revision: 8005c49
trace_clock.c
/*
 * X86 trace clocks
 */
#include <asm/trace_clock.h>
#include <asm/barrier.h>
#include <asm/msr.h>

/*
 * trace_clock_x86_tsc(): A clock that is just the cycle counter.
 *
 * Unlike the other clocks, this is not in nanoseconds.
 */
u64 notrace trace_clock_x86_tsc(void)
{
	return rdtsc_ordered();
}
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