diff options
Diffstat (limited to '')
-rw-r--r-- | src/common/CMakeLists.txt | 11 | ||||
-rw-r--r-- | src/common/bit_cast.h | 20 | ||||
-rw-r--r-- | src/common/input.h | 2 | ||||
-rw-r--r-- | src/common/overflow.h | 22 | ||||
-rw-r--r-- | src/common/steady_clock.cpp | 56 | ||||
-rw-r--r-- | src/common/steady_clock.h | 23 | ||||
-rw-r--r-- | src/common/wall_clock.cpp | 39 | ||||
-rw-r--r-- | src/common/wall_clock.h | 3 | ||||
-rw-r--r-- | src/common/windows/timer_resolution.cpp | 109 | ||||
-rw-r--r-- | src/common/windows/timer_resolution.h | 38 | ||||
-rw-r--r-- | src/common/x64/native_clock.cpp | 17 |
11 files changed, 302 insertions, 38 deletions
diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt index 56b247ac4..61ab68864 100644 --- a/src/common/CMakeLists.txt +++ b/src/common/CMakeLists.txt @@ -91,6 +91,7 @@ add_library(common STATIC multi_level_page_table.h nvidia_flags.cpp nvidia_flags.h + overflow.h page_table.cpp page_table.h param_package.cpp @@ -113,6 +114,8 @@ add_library(common STATIC socket_types.h spin_lock.cpp spin_lock.h + steady_clock.cpp + steady_clock.h stream.cpp stream.h string_util.cpp @@ -142,6 +145,14 @@ add_library(common STATIC zstd_compression.h ) +if (WIN32) + target_sources(common PRIVATE + windows/timer_resolution.cpp + windows/timer_resolution.h + ) + target_link_libraries(common PRIVATE ntdll) +endif() + if(ARCHITECTURE_x86_64) target_sources(common PRIVATE diff --git a/src/common/bit_cast.h b/src/common/bit_cast.h index 535148b4d..c6110c542 100644 --- a/src/common/bit_cast.h +++ b/src/common/bit_cast.h @@ -3,19 +3,21 @@ #pragma once -#include <cstring> -#include <type_traits> +#include <version> + +#ifdef __cpp_lib_bit_cast +#include <bit> +#endif namespace Common { template <typename To, typename From> -[[nodiscard]] std::enable_if_t<sizeof(To) == sizeof(From) && std::is_trivially_copyable_v<From> && - std::is_trivially_copyable_v<To>, - To> -BitCast(const From& src) noexcept { - To dst; - std::memcpy(&dst, &src, sizeof(To)); - return dst; +constexpr inline To BitCast(const From& from) { +#ifdef __cpp_lib_bit_cast + return std::bit_cast<To>(from); +#else + return __builtin_bit_cast(To, from); +#endif } } // namespace Common diff --git a/src/common/input.h b/src/common/input.h index b5748a6c8..98e934685 100644 --- a/src/common/input.h +++ b/src/common/input.h @@ -46,7 +46,7 @@ enum class PollingMode { // Constant polling of buttons, analogs and motion data Active, // Only update on button change, digital analogs - Pasive, + Passive, // Enable near field communication polling NFC, // Enable infrared camera polling diff --git a/src/common/overflow.h b/src/common/overflow.h new file mode 100644 index 000000000..44d8e7e73 --- /dev/null +++ b/src/common/overflow.h @@ -0,0 +1,22 @@ +// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#pragma once + +#include <type_traits> +#include "bit_cast.h" + +namespace Common { + +template <typename T> + requires(std::is_integral_v<T> && std::is_signed_v<T>) +inline T WrappingAdd(T lhs, T rhs) { + using U = std::make_unsigned_t<T>; + + U lhs_u = BitCast<U>(lhs); + U rhs_u = BitCast<U>(rhs); + + return BitCast<T>(lhs_u + rhs_u); +} + +} // namespace Common diff --git a/src/common/steady_clock.cpp b/src/common/steady_clock.cpp new file mode 100644 index 000000000..0d5908aa7 --- /dev/null +++ b/src/common/steady_clock.cpp @@ -0,0 +1,56 @@ +// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#if defined(_WIN32) +#include <windows.h> +#else +#include <time.h> +#endif + +#include "common/steady_clock.h" + +namespace Common { + +#ifdef _WIN32 +static s64 WindowsQueryPerformanceFrequency() { + LARGE_INTEGER frequency; + QueryPerformanceFrequency(&frequency); + return frequency.QuadPart; +} + +static s64 WindowsQueryPerformanceCounter() { + LARGE_INTEGER counter; + QueryPerformanceCounter(&counter); + return counter.QuadPart; +} +#endif + +SteadyClock::time_point SteadyClock::Now() noexcept { +#if defined(_WIN32) + static const auto freq = WindowsQueryPerformanceFrequency(); + const auto counter = WindowsQueryPerformanceCounter(); + + // 10 MHz is a very common QPC frequency on modern PCs. + // Optimizing for this specific frequency can double the performance of + // this function by avoiding the expensive frequency conversion path. + static constexpr s64 TenMHz = 10'000'000; + + if (freq == TenMHz) [[likely]] { + static_assert(period::den % TenMHz == 0); + static constexpr s64 Multiplier = period::den / TenMHz; + return time_point{duration{counter * Multiplier}}; + } + + const auto whole = (counter / freq) * period::den; + const auto part = (counter % freq) * period::den / freq; + return time_point{duration{whole + part}}; +#elif defined(__APPLE__) + return time_point{duration{clock_gettime_nsec_np(CLOCK_MONOTONIC_RAW)}}; +#else + timespec ts; + clock_gettime(CLOCK_MONOTONIC, &ts); + return time_point{std::chrono::seconds{ts.tv_sec} + std::chrono::nanoseconds{ts.tv_nsec}}; +#endif +} + +}; // namespace Common diff --git a/src/common/steady_clock.h b/src/common/steady_clock.h new file mode 100644 index 000000000..9497cf865 --- /dev/null +++ b/src/common/steady_clock.h @@ -0,0 +1,23 @@ +// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#pragma once + +#include <chrono> + +#include "common/common_types.h" + +namespace Common { + +struct SteadyClock { + using rep = s64; + using period = std::nano; + using duration = std::chrono::nanoseconds; + using time_point = std::chrono::time_point<SteadyClock>; + + static constexpr bool is_steady = true; + + [[nodiscard]] static time_point Now() noexcept; +}; + +} // namespace Common diff --git a/src/common/wall_clock.cpp b/src/common/wall_clock.cpp index ae07f2811..817e71d52 100644 --- a/src/common/wall_clock.cpp +++ b/src/common/wall_clock.cpp @@ -1,6 +1,7 @@ // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project // SPDX-License-Identifier: GPL-2.0-or-later +#include "common/steady_clock.h" #include "common/uint128.h" #include "common/wall_clock.h" @@ -11,45 +12,32 @@ namespace Common { -using base_timer = std::chrono::steady_clock; -using base_time_point = std::chrono::time_point<base_timer>; - class StandardWallClock final : public WallClock { public: explicit StandardWallClock(u64 emulated_cpu_frequency_, u64 emulated_clock_frequency_) - : WallClock(emulated_cpu_frequency_, emulated_clock_frequency_, false) { - start_time = base_timer::now(); - } + : WallClock{emulated_cpu_frequency_, emulated_clock_frequency_, false}, + start_time{SteadyClock::Now()} {} std::chrono::nanoseconds GetTimeNS() override { - base_time_point current = base_timer::now(); - auto elapsed = current - start_time; - return std::chrono::duration_cast<std::chrono::nanoseconds>(elapsed); + return SteadyClock::Now() - start_time; } std::chrono::microseconds GetTimeUS() override { - base_time_point current = base_timer::now(); - auto elapsed = current - start_time; - return std::chrono::duration_cast<std::chrono::microseconds>(elapsed); + return std::chrono::duration_cast<std::chrono::microseconds>(GetTimeNS()); } std::chrono::milliseconds GetTimeMS() override { - base_time_point current = base_timer::now(); - auto elapsed = current - start_time; - return std::chrono::duration_cast<std::chrono::milliseconds>(elapsed); + return std::chrono::duration_cast<std::chrono::milliseconds>(GetTimeNS()); } u64 GetClockCycles() override { - std::chrono::nanoseconds time_now = GetTimeNS(); - const u128 temporary = - Common::Multiply64Into128(time_now.count(), emulated_clock_frequency); - return Common::Divide128On32(temporary, 1000000000).first; + const u128 temp = Common::Multiply64Into128(GetTimeNS().count(), emulated_clock_frequency); + return Common::Divide128On32(temp, NS_RATIO).first; } u64 GetCPUCycles() override { - std::chrono::nanoseconds time_now = GetTimeNS(); - const u128 temporary = Common::Multiply64Into128(time_now.count(), emulated_cpu_frequency); - return Common::Divide128On32(temporary, 1000000000).first; + const u128 temp = Common::Multiply64Into128(GetTimeNS().count(), emulated_cpu_frequency); + return Common::Divide128On32(temp, NS_RATIO).first; } void Pause([[maybe_unused]] bool is_paused) override { @@ -57,7 +45,7 @@ public: } private: - base_time_point start_time; + SteadyClock::time_point start_time; }; #ifdef ARCHITECTURE_x86_64 @@ -93,4 +81,9 @@ std::unique_ptr<WallClock> CreateBestMatchingClock(u64 emulated_cpu_frequency, #endif +std::unique_ptr<WallClock> CreateStandardWallClock(u64 emulated_cpu_frequency, + u64 emulated_clock_frequency) { + return std::make_unique<StandardWallClock>(emulated_cpu_frequency, emulated_clock_frequency); +} + } // namespace Common diff --git a/src/common/wall_clock.h b/src/common/wall_clock.h index 828a523a8..157ec5eae 100644 --- a/src/common/wall_clock.h +++ b/src/common/wall_clock.h @@ -55,4 +55,7 @@ private: [[nodiscard]] std::unique_ptr<WallClock> CreateBestMatchingClock(u64 emulated_cpu_frequency, u64 emulated_clock_frequency); +[[nodiscard]] std::unique_ptr<WallClock> CreateStandardWallClock(u64 emulated_cpu_frequency, + u64 emulated_clock_frequency); + } // namespace Common diff --git a/src/common/windows/timer_resolution.cpp b/src/common/windows/timer_resolution.cpp new file mode 100644 index 000000000..29c6e5c7e --- /dev/null +++ b/src/common/windows/timer_resolution.cpp @@ -0,0 +1,109 @@ +// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#include <windows.h> + +#include "common/windows/timer_resolution.h" + +extern "C" { +// http://undocumented.ntinternals.net/index.html?page=UserMode%2FUndocumented%20Functions%2FTime%2FNtQueryTimerResolution.html +NTSYSAPI LONG NTAPI NtQueryTimerResolution(PULONG MinimumResolution, PULONG MaximumResolution, + PULONG CurrentResolution); + +// http://undocumented.ntinternals.net/index.html?page=UserMode%2FUndocumented%20Functions%2FTime%2FNtSetTimerResolution.html +NTSYSAPI LONG NTAPI NtSetTimerResolution(ULONG DesiredResolution, BOOLEAN SetResolution, + PULONG CurrentResolution); + +// http://undocumented.ntinternals.net/index.html?page=UserMode%2FUndocumented%20Functions%2FNT%20Objects%2FThread%2FNtDelayExecution.html +NTSYSAPI LONG NTAPI NtDelayExecution(BOOLEAN Alertable, PLARGE_INTEGER DelayInterval); +} + +// Defines for compatibility with older Windows 10 SDKs. + +#ifndef PROCESS_POWER_THROTTLING_EXECUTION_SPEED +#define PROCESS_POWER_THROTTLING_EXECUTION_SPEED 0x1 +#endif +#ifndef PROCESS_POWER_THROTTLING_IGNORE_TIMER_RESOLUTION +#define PROCESS_POWER_THROTTLING_IGNORE_TIMER_RESOLUTION 0x4 +#endif + +namespace Common::Windows { + +namespace { + +using namespace std::chrono; + +constexpr nanoseconds ToNS(ULONG hundred_ns) { + return nanoseconds{hundred_ns * 100}; +} + +constexpr ULONG ToHundredNS(nanoseconds ns) { + return static_cast<ULONG>(ns.count()) / 100; +} + +struct TimerResolution { + std::chrono::nanoseconds minimum; + std::chrono::nanoseconds maximum; + std::chrono::nanoseconds current; +}; + +TimerResolution GetTimerResolution() { + ULONG MinimumTimerResolution; + ULONG MaximumTimerResolution; + ULONG CurrentTimerResolution; + NtQueryTimerResolution(&MinimumTimerResolution, &MaximumTimerResolution, + &CurrentTimerResolution); + return { + .minimum{ToNS(MinimumTimerResolution)}, + .maximum{ToNS(MaximumTimerResolution)}, + .current{ToNS(CurrentTimerResolution)}, + }; +} + +void SetHighQoS() { + // https://learn.microsoft.com/en-us/windows/win32/procthread/quality-of-service + PROCESS_POWER_THROTTLING_STATE PowerThrottling{ + .Version{PROCESS_POWER_THROTTLING_CURRENT_VERSION}, + .ControlMask{PROCESS_POWER_THROTTLING_EXECUTION_SPEED | + PROCESS_POWER_THROTTLING_IGNORE_TIMER_RESOLUTION}, + .StateMask{}, + }; + SetProcessInformation(GetCurrentProcess(), ProcessPowerThrottling, &PowerThrottling, + sizeof(PROCESS_POWER_THROTTLING_STATE)); +} + +} // Anonymous namespace + +nanoseconds GetMinimumTimerResolution() { + return GetTimerResolution().minimum; +} + +nanoseconds GetMaximumTimerResolution() { + return GetTimerResolution().maximum; +} + +nanoseconds GetCurrentTimerResolution() { + return GetTimerResolution().current; +} + +nanoseconds SetCurrentTimerResolution(nanoseconds timer_resolution) { + // Set the timer resolution, and return the current timer resolution. + const auto DesiredTimerResolution = ToHundredNS(timer_resolution); + ULONG CurrentTimerResolution; + NtSetTimerResolution(DesiredTimerResolution, TRUE, &CurrentTimerResolution); + return ToNS(CurrentTimerResolution); +} + +nanoseconds SetCurrentTimerResolutionToMaximum() { + SetHighQoS(); + return SetCurrentTimerResolution(GetMaximumTimerResolution()); +} + +void SleepForOneTick() { + LARGE_INTEGER DelayInterval{ + .QuadPart{-1}, + }; + NtDelayExecution(FALSE, &DelayInterval); +} + +} // namespace Common::Windows diff --git a/src/common/windows/timer_resolution.h b/src/common/windows/timer_resolution.h new file mode 100644 index 000000000..e1e50a62d --- /dev/null +++ b/src/common/windows/timer_resolution.h @@ -0,0 +1,38 @@ +// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#pragma once + +#include <chrono> + +namespace Common::Windows { + +/// Returns the minimum (least precise) supported timer resolution in nanoseconds. +std::chrono::nanoseconds GetMinimumTimerResolution(); + +/// Returns the maximum (most precise) supported timer resolution in nanoseconds. +std::chrono::nanoseconds GetMaximumTimerResolution(); + +/// Returns the current timer resolution in nanoseconds. +std::chrono::nanoseconds GetCurrentTimerResolution(); + +/** + * Sets the current timer resolution. + * + * @param timer_resolution Timer resolution in nanoseconds. + * + * @returns The current timer resolution. + */ +std::chrono::nanoseconds SetCurrentTimerResolution(std::chrono::nanoseconds timer_resolution); + +/** + * Sets the current timer resolution to the maximum supported timer resolution. + * + * @returns The current timer resolution. + */ +std::chrono::nanoseconds SetCurrentTimerResolutionToMaximum(); + +/// Sleep for one tick of the current timer resolution. +void SleepForOneTick(); + +} // namespace Common::Windows diff --git a/src/common/x64/native_clock.cpp b/src/common/x64/native_clock.cpp index 8b08332ab..bc1a973b0 100644 --- a/src/common/x64/native_clock.cpp +++ b/src/common/x64/native_clock.cpp @@ -6,6 +6,7 @@ #include <thread> #include "common/atomic_ops.h" +#include "common/steady_clock.h" #include "common/uint128.h" #include "common/x64/native_clock.h" @@ -39,6 +40,12 @@ static u64 FencedRDTSC() { } #endif +template <u64 Nearest> +static u64 RoundToNearest(u64 value) { + const auto mod = value % Nearest; + return mod >= (Nearest / 2) ? (value - mod + Nearest) : (value - mod); +} + u64 EstimateRDTSCFrequency() { // Discard the first result measuring the rdtsc. FencedRDTSC(); @@ -46,18 +53,18 @@ u64 EstimateRDTSCFrequency() { FencedRDTSC(); // Get the current time. - const auto start_time = std::chrono::steady_clock::now(); + const auto start_time = Common::SteadyClock::Now(); const u64 tsc_start = FencedRDTSC(); - // Wait for 200 milliseconds. - std::this_thread::sleep_for(std::chrono::milliseconds{200}); - const auto end_time = std::chrono::steady_clock::now(); + // Wait for 250 milliseconds. + std::this_thread::sleep_for(std::chrono::milliseconds{250}); + const auto end_time = Common::SteadyClock::Now(); const u64 tsc_end = FencedRDTSC(); // Calculate differences. const u64 timer_diff = static_cast<u64>( std::chrono::duration_cast<std::chrono::nanoseconds>(end_time - start_time).count()); const u64 tsc_diff = tsc_end - tsc_start; const u64 tsc_freq = MultiplyAndDivide64(tsc_diff, 1000000000ULL, timer_diff); - return tsc_freq; + return RoundToNearest<1000>(tsc_freq); } namespace X64 { |