Move the rdtsc() function so it can
be reusued.
Signed-off-by: Adrian Hunter <adrian.hun...@intel.com>
---
tools/perf/arch/x86/util/tsc.c | 9 +++++++++
tools/perf/tests/perf-time-to-tsc.c | 9 ---------
tools/perf/util/tsc.c | 5 +++++
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 3655f24..fd28684 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 0372f6e..f238442 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 ef4749836..4d4210d 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 4eca848..a8b78f1 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
--
1.8.3.2
--
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