logging: Make use of bounded queue

This commit is contained in:
Morph 2023-06-24 11:54:18 +03:00 committed by GPUCode
parent 52b9007fcf
commit 0ddb095273
3 changed files with 259 additions and 8 deletions

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@ -57,6 +57,7 @@ add_library(citra_common STATIC
detached_tasks.h detached_tasks.h
bit_field.h bit_field.h
bit_set.h bit_set.h
bounded_threadsafe_queue.h
cityhash.cpp cityhash.cpp
cityhash.h cityhash.h
color.h color.h

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@ -0,0 +1,250 @@
// Copyright 2023 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <atomic>
#include <condition_variable>
#include <cstddef>
#include <mutex>
#include <new>
#include "common/polyfill_thread.h"
namespace Common {
namespace detail {
constexpr size_t DefaultCapacity = 0x1000;
} // namespace detail
template <typename T, size_t Capacity = detail::DefaultCapacity>
class SPSCQueue {
static_assert((Capacity & (Capacity - 1)) == 0, "Capacity must be a power of two.");
public:
template <typename... Args>
bool TryEmplace(Args&&... args) {
return Emplace<PushMode::Try>(std::forward<Args>(args)...);
}
template <typename... Args>
void EmplaceWait(Args&&... args) {
Emplace<PushMode::Wait>(std::forward<Args>(args)...);
}
bool TryPop(T& t) {
return Pop<PopMode::Try>(t);
}
void PopWait(T& t) {
Pop<PopMode::Wait>(t);
}
void PopWait(T& t, std::stop_token stop_token) {
Pop<PopMode::WaitWithStopToken>(t, stop_token);
}
T PopWait() {
T t;
Pop<PopMode::Wait>(t);
return t;
}
T PopWait(std::stop_token stop_token) {
T t;
Pop<PopMode::WaitWithStopToken>(t, stop_token);
return t;
}
private:
enum class PushMode {
Try,
Wait,
Count,
};
enum class PopMode {
Try,
Wait,
WaitWithStopToken,
Count,
};
template <PushMode Mode, typename... Args>
bool Emplace(Args&&... args) {
const size_t write_index = m_write_index.load(std::memory_order::relaxed);
if constexpr (Mode == PushMode::Try) {
// Check if we have free slots to write to.
if ((write_index - m_read_index.load(std::memory_order::acquire)) == Capacity) {
return false;
}
} else if constexpr (Mode == PushMode::Wait) {
// Wait until we have free slots to write to.
std::unique_lock lock{producer_cv_mutex};
producer_cv.wait(lock, [this, write_index] {
return (write_index - m_read_index.load(std::memory_order::acquire)) < Capacity;
});
} else {
static_assert(Mode < PushMode::Count, "Invalid PushMode.");
}
// Determine the position to write to.
const size_t pos = write_index % Capacity;
// Emplace into the queue.
std::construct_at(std::addressof(m_data[pos]), std::forward<Args>(args)...);
// Increment the write index.
++m_write_index;
// Notify the consumer that we have pushed into the queue.
std::scoped_lock lock{consumer_cv_mutex};
consumer_cv.notify_one();
return true;
}
template <PopMode Mode>
bool Pop(T& t, [[maybe_unused]] std::stop_token stop_token = {}) {
const size_t read_index = m_read_index.load(std::memory_order::relaxed);
if constexpr (Mode == PopMode::Try) {
// Check if the queue is empty.
if (read_index == m_write_index.load(std::memory_order::acquire)) {
return false;
}
} else if constexpr (Mode == PopMode::Wait) {
// Wait until the queue is not empty.
std::unique_lock lock{consumer_cv_mutex};
consumer_cv.wait(lock, [this, read_index] {
return read_index != m_write_index.load(std::memory_order::acquire);
});
} else if constexpr (Mode == PopMode::WaitWithStopToken) {
// Wait until the queue is not empty.
std::unique_lock lock{consumer_cv_mutex};
Common::CondvarWait(consumer_cv, lock, stop_token, [this, read_index] {
return read_index != m_write_index.load(std::memory_order::acquire);
});
if (stop_token.stop_requested()) {
return false;
}
} else {
static_assert(Mode < PopMode::Count, "Invalid PopMode.");
}
// Determine the position to read from.
const size_t pos = read_index % Capacity;
// Pop the data off the queue, moving it.
t = std::move(m_data[pos]);
// Increment the read index.
++m_read_index;
// Notify the producer that we have popped off the queue.
std::scoped_lock lock{producer_cv_mutex};
producer_cv.notify_one();
return true;
}
alignas(128) std::atomic_size_t m_read_index{0};
alignas(128) std::atomic_size_t m_write_index{0};
std::array<T, Capacity> m_data;
std::condition_variable_any producer_cv;
std::mutex producer_cv_mutex;
std::condition_variable_any consumer_cv;
std::mutex consumer_cv_mutex;
};
template <typename T, size_t Capacity = detail::DefaultCapacity>
class MPSCQueue {
public:
template <typename... Args>
bool TryEmplace(Args&&... args) {
std::scoped_lock lock{write_mutex};
return spsc_queue.TryEmplace(std::forward<Args>(args)...);
}
template <typename... Args>
void EmplaceWait(Args&&... args) {
std::scoped_lock lock{write_mutex};
spsc_queue.EmplaceWait(std::forward<Args>(args)...);
}
bool TryPop(T& t) {
return spsc_queue.TryPop(t);
}
void PopWait(T& t) {
spsc_queue.PopWait(t);
}
void PopWait(T& t, std::stop_token stop_token) {
spsc_queue.PopWait(t, stop_token);
}
T PopWait() {
return spsc_queue.PopWait();
}
T PopWait(std::stop_token stop_token) {
return spsc_queue.PopWait(stop_token);
}
private:
SPSCQueue<T, Capacity> spsc_queue;
std::mutex write_mutex;
};
template <typename T, size_t Capacity = detail::DefaultCapacity>
class MPMCQueue {
public:
template <typename... Args>
bool TryEmplace(Args&&... args) {
std::scoped_lock lock{write_mutex};
return spsc_queue.TryEmplace(std::forward<Args>(args)...);
}
template <typename... Args>
void EmplaceWait(Args&&... args) {
std::scoped_lock lock{write_mutex};
spsc_queue.EmplaceWait(std::forward<Args>(args)...);
}
bool TryPop(T& t) {
std::scoped_lock lock{read_mutex};
return spsc_queue.TryPop(t);
}
void PopWait(T& t) {
std::scoped_lock lock{read_mutex};
spsc_queue.PopWait(t);
}
void PopWait(T& t, std::stop_token stop_token) {
std::scoped_lock lock{read_mutex};
spsc_queue.PopWait(t, stop_token);
}
T PopWait() {
std::scoped_lock lock{read_mutex};
return spsc_queue.PopWait();
}
T PopWait(std::stop_token stop_token) {
std::scoped_lock lock{read_mutex};
return spsc_queue.PopWait(stop_token);
}
private:
SPSCQueue<T, Capacity> spsc_queue;
std::mutex write_mutex;
std::mutex read_mutex;
};
} // namespace Common

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@ -21,6 +21,7 @@
#define CITRA_LINUX_GCC_BACKTRACE #define CITRA_LINUX_GCC_BACKTRACE
#endif #endif
#include "common/bounded_threadsafe_queue.h"
#include "common/common_paths.h" #include "common/common_paths.h"
#include "common/file_util.h" #include "common/file_util.h"
#include "common/literals.h" #include "common/literals.h"
@ -32,7 +33,6 @@
#include "common/settings.h" #include "common/settings.h"
#include "common/string_util.h" #include "common/string_util.h"
#include "common/thread.h" #include "common/thread.h"
#include "common/threadsafe_queue.h"
namespace Common::Log { namespace Common::Log {
@ -237,11 +237,11 @@ public:
void PushEntry(Class log_class, Level log_level, const char* filename, unsigned int line_num, void PushEntry(Class log_class, Level log_level, const char* filename, unsigned int line_num,
const char* function, std::string message) { const char* function, std::string message) {
if (!filter.CheckMessage(log_class, log_level)) if (!filter.CheckMessage(log_class, log_level)) {
return; return;
const Entry& entry = }
CreateEntry(log_class, log_level, filename, line_num, function, std::move(message)); message_queue.EmplaceWait(
message_queue.Push(entry); CreateEntry(log_class, log_level, filename, line_num, function, std::move(message)));
} }
private: private:
@ -317,7 +317,7 @@ private:
ForEachBackend([&entry](Backend& backend) { backend.Write(entry); }); ForEachBackend([&entry](Backend& backend) { backend.Write(entry); });
}; };
while (!stop_token.stop_requested()) { while (!stop_token.stop_requested()) {
entry = message_queue.PopWait(stop_token); message_queue.PopWait(entry, stop_token);
if (entry.filename != nullptr) { if (entry.filename != nullptr) {
write_logs(); write_logs();
} }
@ -325,7 +325,7 @@ private:
// Drain the logging queue. Only writes out up to MAX_LOGS_TO_WRITE to prevent a // Drain the logging queue. Only writes out up to MAX_LOGS_TO_WRITE to prevent a
// case where a system is repeatedly spamming logs even on close. // case where a system is repeatedly spamming logs even on close.
int max_logs_to_write = filter.IsDebug() ? INT_MAX : 100; int max_logs_to_write = filter.IsDebug() ? INT_MAX : 100;
while (max_logs_to_write-- && message_queue.Pop(entry)) { while (max_logs_to_write-- && message_queue.TryPop(entry)) {
write_logs(); write_logs();
} }
}); });
@ -395,7 +395,7 @@ private:
ColorConsoleBackend color_console_backend{}; ColorConsoleBackend color_console_backend{};
FileBackend file_backend; FileBackend file_backend;
MPSCQueue<Entry, true> message_queue{}; MPSCQueue<Entry> message_queue{};
std::chrono::steady_clock::time_point time_origin{std::chrono::steady_clock::now()}; std::chrono::steady_clock::time_point time_origin{std::chrono::steady_clock::now()};
std::jthread backend_thread; std::jthread backend_thread;