From 2e1e7254436b032f133372c76d9484aa756d56df Mon Sep 17 00:00:00 2001 From: Morph <39850852+Morph1984@users.noreply.github.com> Date: Wed, 7 Jun 2023 21:38:28 -0400 Subject: [PATCH] core_timing: Fix SingleCore cycle timer --- src/common/wall_clock.h | 36 +++++++++++++++------------- src/core/core_timing.cpp | 26 +++++++------------- src/core/core_timing.h | 2 +- src/core/hle/kernel/svc/svc_tick.cpp | 10 +------- 4 files changed, 31 insertions(+), 43 deletions(-) diff --git a/src/common/wall_clock.h b/src/common/wall_clock.h index fcfdd637ca..f45d3d8c52 100644 --- a/src/common/wall_clock.h +++ b/src/common/wall_clock.h @@ -13,8 +13,9 @@ namespace Common { class WallClock { public: - 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 + 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 + static constexpr u64 CPUTickFreq = 1'020'000'000; // T210/4 A57 CPU Tick Frequency = 1020.0 MHz virtual ~WallClock() = default; @@ -46,28 +47,26 @@ public: return ns * NsToCNTPCTRatio::num / NsToCNTPCTRatio::den; } - static inline u64 USToCNTPCT(u64 us) { - 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; + // Cycle Timing + + static inline u64 CPUTickToNS(u64 cpu_tick) { + return cpu_tick * CPUTickToNsRatio::num / CPUTickToNsRatio::den; } - static inline u64 CNTPCTToUS(u64 cntpct) { - return cntpct * UsToCNTPCTRatio::den / UsToCNTPCTRatio::num; + static inline u64 CPUTickToUS(u64 cpu_tick) { + return cpu_tick * CPUTickToUsRatio::num / CPUTickToUsRatio::den; } - static inline u64 GPUTickToNS(u64 gpu_tick) { - return gpu_tick * NsToGPUTickRatio::den / NsToGPUTickRatio::num; + static inline u64 CPUTickToCNTPCT(u64 cpu_tick) { + return cpu_tick * CPUTickToCNTPCTRatio::num / CPUTickToCNTPCTRatio::den; } - static inline u64 CNTPCTToGPUTick(u64 cntpct) { - return cntpct * CNTPCTToGPUTickRatio::num / CNTPCTToGPUTickRatio::den; + static inline u64 CPUTickToGPUTick(u64 cpu_tick) { + return cpu_tick * CPUTickToGPUTickRatio::num / CPUTickToGPUTickRatio::den; } protected: @@ -78,9 +77,14 @@ protected: using NsToUsRatio = std::ratio_divide; using NsToMsRatio = std::ratio_divide; using NsToCNTPCTRatio = std::ratio; - using UsToCNTPCTRatio = std::ratio; using NsToGPUTickRatio = std::ratio; - using CNTPCTToGPUTickRatio = std::ratio; + + // Cycle Timing + + using CPUTickToNsRatio = std::ratio; + using CPUTickToUsRatio = std::ratio; + using CPUTickToCNTPCTRatio = std::ratio; + using CPUTickToGPUTickRatio = std::ratio; }; std::unique_ptr CreateOptimalClock(); diff --git a/src/core/core_timing.cpp b/src/core/core_timing.cpp index e57bca70af..4f0a3f8eab 100644 --- a/src/core/core_timing.cpp +++ b/src/core/core_timing.cpp @@ -20,7 +20,7 @@ namespace Core::Timing { -constexpr s64 MAX_SLICE_LENGTH = 4000; +constexpr s64 MAX_SLICE_LENGTH = 10000; std::shared_ptr CreateEvent(std::string name, TimedCallback&& callback) { return std::make_shared(std::move(callback), std::move(name)); @@ -65,7 +65,7 @@ void CoreTiming::Initialize(std::function&& on_thread_init_) { on_thread_init = std::move(on_thread_init_); event_fifo_id = 0; shutting_down = false; - ticks = 0; + cpu_ticks = 0; const auto empty_timed_callback = [](std::uintptr_t, u64, std::chrono::nanoseconds) -> std::optional { return std::nullopt; }; ev_lost = CreateEvent("_lost_event", empty_timed_callback); @@ -170,20 +170,12 @@ void CoreTiming::UnscheduleEvent(const std::shared_ptr& event_type, } void CoreTiming::AddTicks(u64 ticks_to_add) { - ticks += ticks_to_add; - downcount -= static_cast(ticks); + cpu_ticks += ticks_to_add; + downcount -= static_cast(cpu_ticks); } void CoreTiming::Idle() { - if (!event_queue.empty()) { - const u64 next_event_time = event_queue.front().time; - const u64 next_ticks = Common::WallClock::NSToCNTPCT(next_event_time) + 10U; - if (next_ticks > ticks) { - ticks = next_ticks; - } - return; - } - ticks += 1000U; + cpu_ticks += 1000U; } void CoreTiming::ResetTicks() { @@ -194,14 +186,14 @@ u64 CoreTiming::GetClockTicks() const { if (is_multicore) [[likely]] { return clock->GetCNTPCT(); } - return ticks; + return Common::WallClock::CPUTickToCNTPCT(cpu_ticks); } u64 CoreTiming::GetGPUTicks() const { if (is_multicore) [[likely]] { return clock->GetGPUTick(); } - return Common::WallClock::CNTPCTToGPUTick(ticks); + return Common::WallClock::CPUTickToGPUTick(cpu_ticks); } std::optional CoreTiming::Advance() { @@ -314,14 +306,14 @@ std::chrono::nanoseconds CoreTiming::GetGlobalTimeNs() const { if (is_multicore) [[likely]] { return clock->GetTimeNS(); } - return std::chrono::nanoseconds{Common::WallClock::CNTPCTToNS(ticks)}; + return std::chrono::nanoseconds{Common::WallClock::CPUTickToNS(cpu_ticks)}; } std::chrono::microseconds CoreTiming::GetGlobalTimeUs() const { if (is_multicore) [[likely]] { return clock->GetTimeUS(); } - return std::chrono::microseconds{Common::WallClock::CNTPCTToUS(ticks)}; + return std::chrono::microseconds{Common::WallClock::CPUTickToUS(cpu_ticks)}; } } // namespace Core::Timing diff --git a/src/core/core_timing.h b/src/core/core_timing.h index 1873852c40..10db1de552 100644 --- a/src/core/core_timing.h +++ b/src/core/core_timing.h @@ -167,7 +167,7 @@ private: s64 pause_end_time{}; /// Cycle timing - u64 ticks{}; + u64 cpu_ticks{}; s64 downcount{}; }; diff --git a/src/core/hle/kernel/svc/svc_tick.cpp b/src/core/hle/kernel/svc/svc_tick.cpp index 5613364821..7dd7c6e518 100644 --- a/src/core/hle/kernel/svc/svc_tick.cpp +++ b/src/core/hle/kernel/svc/svc_tick.cpp @@ -12,16 +12,8 @@ namespace Kernel::Svc { int64_t GetSystemTick(Core::System& system) { LOG_TRACE(Kernel_SVC, "called"); - auto& core_timing = system.CoreTiming(); - // Returns the value of cntpct_el0 (https://switchbrew.org/wiki/SVC#svcGetSystemTick) - const u64 result{core_timing.GetClockTicks()}; - - if (!system.Kernel().IsMulticore()) { - core_timing.AddTicks(400U); - } - - return static_cast(result); + return static_cast(system.CoreTiming().GetClockTicks()); } int64_t GetSystemTick64(Core::System& system) {