Mirrors/yuzu
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

(wall, native)_clock: Add GetGPUTick

Browse source 
Allows us to directly calculate the GPU tick without double conversion to and from the host clock tick.
This commit is contained in:
Morph 2023-05-28 17:45:47 -04:00
parent 9dcc7bde8b
commit 907507886d
7 changed files with 47 additions and 12 deletions
Download patch file Download diff file Expand all files Collapse all files

20
src/common/wall_clock.h
View file

@ -13,7 +13,8 @@ namespace Common {
class WallClock {
public:
static constexpr u64 CNTFRQ = 19'200'000; // CNTPCT_EL0 Frequency = 19.2 MHz
static constexpr u64 CNTFRQ = 19'200'000; // CNTPCT_EL0 Frequency = 19.2 MHz
static constexpr u64 GPUTickFreq = 614'400'000; // GM20B GPU Tick Frequency = 614.4 MHz
virtual ~WallClock() = default;
@ -29,6 +30,9 @@ public:
/// @returns The guest CNTPCT ticks since the construction of this clock.
virtual u64 GetCNTPCT() const = 0;
/// @returns The guest GPU ticks since the construction of this clock.
virtual u64 GetGPUTick() const = 0;
/// @returns The raw host timer ticks since an indeterminate epoch.
virtual u64 GetHostTicksNow() const = 0;
@ -46,6 +50,10 @@ public:
return us * UsToCNTPCTRatio::num / UsToCNTPCTRatio::den;
}
static inline u64 NSToGPUTick(u64 ns) {
return ns * NsToGPUTickRatio::num / NsToGPUTickRatio::den;
}
static inline u64 CNTPCTToNS(u64 cntpct) {
return cntpct * NsToCNTPCTRatio::den / NsToCNTPCTRatio::num;
}
@ -54,6 +62,14 @@ public:
return cntpct * UsToCNTPCTRatio::den / UsToCNTPCTRatio::num;
}
static inline u64 GPUTickToNS(u64 gpu_tick) {
return gpu_tick * NsToGPUTickRatio::den / NsToGPUTickRatio::num;
}
static inline u64 CNTPCTToGPUTick(u64 cntpct) {
return cntpct * CNTPCTToGPUTickRatio::num / CNTPCTToGPUTickRatio::den;
}
protected:
using NsRatio = std::nano;
using UsRatio = std::micro;
@ -63,6 +79,8 @@ protected:
using NsToMsRatio = std::ratio_divide<std::nano, std::milli>;
using NsToCNTPCTRatio = std::ratio<CNTFRQ, std::nano::den>;
using UsToCNTPCTRatio = std::ratio<CNTFRQ, std::micro::den>;
using NsToGPUTickRatio = std::ratio<GPUTickFreq, std::nano::den>;
using CNTPCTToGPUTickRatio = std::ratio<GPUTickFreq, CNTFRQ>;
};
std::unique_ptr<WallClock> CreateOptimalClock();