diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2014-07-22 17:17:32 +0400 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2014-07-23 18:48:11 +0400 |
| commit | a6a69db4b686e51045771945669bba6578af67c1 (patch) | |
| tree | db97f51a927367b4bd875c7879150af5eba0714a /tools/perf/arch | |
| parent | b9d266baac0429f70df3f9cf751b045730d612e3 (diff) | |
| download | linux-a6a69db4b686e51045771945669bba6578af67c1.tar.xz | |
perf tools: Move rdtsc() function
Move the rdtsc() function so it can be reusued.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1406035081-14301-24-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/arch')
| -rw-r--r-- | tools/perf/arch/x86/util/tsc.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/tools/perf/arch/x86/util/tsc.c b/tools/perf/arch/x86/util/tsc.c index 3655f24c3170..fd2868490d00 100644 --- a/tools/perf/arch/x86/util/tsc.c +++ b/tools/perf/arch/x86/util/tsc.c @@ -37,3 +37,12 @@ int perf_read_tsc_conversion(const struct perf_event_mmap_page *pc, return 0; } + +u64 rdtsc(void) +{ + unsigned int low, high; + + asm volatile("rdtsc" : "=a" (low), "=d" (high)); + + return low | ((u64)high) << 32; +} |