diff options
| author |   Adrian Hunter <adrian.hunter@intel.com> | 2014-07-22 16:17:32 +0300 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2014-07-23 11:48:11 -0300 |
| commit | a6a69db4b686e51045771945669bba6578af67c1 (patch) | |
| tree | db97f51a927367b4bd875c7879150af5eba0714a /tools | |
| parent | perf machine: Add ability to record the current tid for each cpu (diff) | |
| download | wireguard-linux-a6a69db4b686e51045771945669bba6578af67c1.tar.xz wireguard-linux-a6a69db4b686e51045771945669bba6578af67c1.zip | |
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')
| -rw-r--r-- | tools/perf/arch/x86/util/tsc.c | 9 | ||||
| -rw-r--r-- | tools/perf/tests/perf-time-to-tsc.c | 9 | ||||
| -rw-r--r-- | tools/perf/util/tsc.c | 5 | ||||
| -rw-r--r-- | tools/perf/util/tsc.h | 1 |
4 files changed, 15 insertions, 9 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; +} diff --git a/tools/perf/tests/perf-time-to-tsc.c b/tools/perf/tests/perf-time-to-tsc.c index 0372f6edca20..f238442b238a 100644 --- a/tools/perf/tests/perf-time-to-tsc.c +++ b/tools/perf/tests/perf-time-to-tsc.c @@ -25,15 +25,6 @@ } \ } -static u64 rdtsc(void) -{ - unsigned int low, high; - - asm volatile("rdtsc" : "=a" (low), "=d" (high)); - - return low | ((u64)high) << 32; -} - /** * test__perf_time_to_tsc - test converting perf time to TSC. * diff --git a/tools/perf/util/tsc.c b/tools/perf/util/tsc.c index ef4749836ce9..4d4210d4e13d 100644 --- a/tools/perf/util/tsc.c +++ b/tools/perf/util/tsc.c @@ -23,3 +23,8 @@ u64 tsc_to_perf_time(u64 cyc, struct perf_tsc_conversion *tc) return tc->time_zero + quot * tc->time_mult + ((rem * tc->time_mult) >> tc->time_shift); } + +u64 __weak rdtsc(void) +{ + return 0; +} diff --git a/tools/perf/util/tsc.h b/tools/perf/util/tsc.h index 4eca84887c8a..a8b78f1b3243 100644 --- a/tools/perf/util/tsc.h +++ b/tools/perf/util/tsc.h @@ -7,5 +7,6 @@ u64 perf_time_to_tsc(u64 ns, struct perf_tsc_conversion *tc); u64 tsc_to_perf_time(u64 cyc, struct perf_tsc_conversion *tc); +u64 rdtsc(void); #endif |