diff options
Diffstat (limited to 'src/common')
| -rw-r--r-- | src/common/wall_clock.cpp | 16 | ||||
| -rw-r--r-- | src/common/wall_clock.h | 4 |
2 files changed, 12 insertions, 8 deletions
diff --git a/src/common/wall_clock.cpp b/src/common/wall_clock.cpp index 081e0562f..9acf7551e 100644 --- a/src/common/wall_clock.cpp +++ b/src/common/wall_clock.cpp @@ -65,16 +65,20 @@ private: #ifdef ARCHITECTURE_x86_64 -std::unique_ptr<WallClock> CreateBestMatchingClock(u32 emulated_cpu_frequency, - u32 emulated_clock_frequency) { +std::unique_ptr<WallClock> CreateBestMatchingClock(u64 emulated_cpu_frequency, + u64 emulated_clock_frequency) { const auto& caps = GetCPUCaps(); u64 rtsc_frequency = 0; if (caps.invariant_tsc) { rtsc_frequency = EstimateRDTSCFrequency(); } - // Fallback to StandardWallClock if the hardware TSC does not have nanosecond precision. - if (rtsc_frequency <= WallClock::NS_RATIO) { + // Fallback to StandardWallClock if the hardware TSC does not have the precision greater than: + // - A nanosecond + // - The emulated CPU frequency + // - The emulated clock counter frequency (CNTFRQ) + if (rtsc_frequency <= WallClock::NS_RATIO || rtsc_frequency <= emulated_cpu_frequency || + rtsc_frequency <= emulated_clock_frequency) { return std::make_unique<StandardWallClock>(emulated_cpu_frequency, emulated_clock_frequency); } else { @@ -85,8 +89,8 @@ std::unique_ptr<WallClock> CreateBestMatchingClock(u32 emulated_cpu_frequency, #else -std::unique_ptr<WallClock> CreateBestMatchingClock(u32 emulated_cpu_frequency, - u32 emulated_clock_frequency) { +std::unique_ptr<WallClock> CreateBestMatchingClock(u64 emulated_cpu_frequency, + u64 emulated_clock_frequency) { return std::make_unique<StandardWallClock>(emulated_cpu_frequency, emulated_clock_frequency); } diff --git a/src/common/wall_clock.h b/src/common/wall_clock.h index 4d132c531..874448c27 100644 --- a/src/common/wall_clock.h +++ b/src/common/wall_clock.h @@ -53,7 +53,7 @@ private: bool is_native; }; -[[nodiscard]] std::unique_ptr<WallClock> CreateBestMatchingClock(u32 emulated_cpu_frequency, - u32 emulated_clock_frequency); +[[nodiscard]] std::unique_ptr<WallClock> CreateBestMatchingClock(u64 emulated_cpu_frequency, + u64 emulated_clock_frequency); } // namespace Common |