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| author | Merry <git@mary.rs> | 2022-04-03 01:13:27 +0200 |
|---|---|---|
| committer | Merry <git@mary.rs> | 2022-04-03 23:38:12 +0200 |
| commit | 4052bfb4ada22bc922461dab09bef886e3f114ae (patch) | |
| tree | 9580913d090048d961a5f9ee5feabd3968a000ee | |
| parent | native_clock: Use lfence with rdtsc (diff) | |
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| -rw-r--r-- | src/common/x64/native_clock.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/common/x64/native_clock.cpp b/src/common/x64/native_clock.cpp index 63364f839..7fd9d22f8 100644 --- a/src/common/x64/native_clock.cpp +++ b/src/common/x64/native_clock.cpp @@ -16,15 +16,17 @@ namespace Common { -inline u64 FencedRDTSC() { #ifdef _MSC_VER +__forceinline static u64 FencedRDTSC() { _mm_lfence(); _ReadWriteBarrier(); const u64 result = __rdtsc(); _mm_lfence(); _ReadWriteBarrier(); return result; +} #else +static u64 FencedRDTSC() { u64 result; asm volatile("lfence\n\t" "rdtsc\n\t" @@ -35,8 +37,8 @@ inline u64 FencedRDTSC() { : : "rdx", "memory", "cc"); return result; -#endif } +#endif u64 EstimateRDTSCFrequency() { // Discard the first result measuring the rdtsc. |