Commit | Line | Data |
---|---|---|
8cbd9cc6 DS |
1 | /* |
2 | * X86 trace clocks | |
3 | */ | |
4 | #include <asm/trace_clock.h> | |
5 | #include <asm/barrier.h> | |
6 | #include <asm/msr.h> | |
7 | ||
8 | /* | |
9 | * trace_clock_x86_tsc(): A clock that is just the cycle counter. | |
10 | * | |
11 | * Unlike the other clocks, this is not in nanoseconds. | |
12 | */ | |
13 | u64 notrace trace_clock_x86_tsc(void) | |
14 | { | |
15 | u64 ret; | |
16 | ||
17 | rdtsc_barrier(); | |
18 | rdtscll(ret); | |
19 | ||
20 | return ret; | |
21 | } |