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replaced the lockfree queue with bounded, locked queue

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gabime 2018-05-19 14:41:53 +03:00
parent 314afa7dbb
commit 8321449c44
6 changed files with 161 additions and 203 deletions
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33
example/bench.cpp
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@ -7,8 +7,7 @@
// bench.cpp : spdlog benchmarks
//
#include "spdlog/async_logger.h"
#include "spdlog/sinks/file_sinks.h"
#include "spdlog/sinks/null_sink.h"
#include "spdlog/sinks/test_sink.h"
#include "spdlog/spdlog.h"
#include "utils.h"
#include <atomic>
@ -30,12 +29,10 @@ void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count
int main(int argc, char *argv[])
{
int queue_size = 1048576;
int queue_size = 1024*1024;
int howmany = 1000000;
int threads = 10;
int file_size = 30 * 1024 * 1024;
int rotating_files = 5;
try
{
@ -45,7 +42,7 @@ int main(int argc, char *argv[])
threads = atoi(argv[2]);
if (argc > 3)
queue_size = atoi(argv[3]);
/*
cout << "*******************************************************************************\n";
cout << "Single thread, " << format(howmany) << " iterations" << endl;
cout << "*******************************************************************************\n";
@ -67,17 +64,32 @@ int main(int argc, char *argv[])
bench_mt(howmany, daily_mt, threads);
bench(howmany, spdlog::create<null_sink_st>("null_mt"));
*/
cout << "\n*******************************************************************************\n";
cout << "async logging.. " << threads << " threads sharing same logger, " << format(howmany) << " iterations " << endl;
cout << "*******************************************************************************\n";
spdlog::set_async_mode(queue_size);
for (int i = 0; i < 3; ++i)
for (int i = 0; i < 300; ++i)
{
auto as = spdlog::daily_logger_st("as", "logs/daily_async.log");
bench_mt(howmany, as, threads);
//auto as = spdlog::daily_logger_mt("as", "logs/daily_async.log");
auto test_sink = std::make_shared<spdlog::sinks::test_sink_mt>();
//auto as = spdlog::basic_logger_mt("as", "logs/async.log", true);
auto as = std::make_shared<spdlog::async_logger>("as", test_sink, queue_size, async_overflow_policy::block_retry, nullptr, std::chrono::milliseconds(2000));
bench_mt(howmany, as, threads);
as.reset();
spdlog::drop("as");
auto msg_counter = test_sink->msg_counter();
cout << "Count:" << msg_counter << endl;
if (msg_counter != howmany)
{
cout << "ERROR! Expected " << howmany;
exit(0);
}
}
}
catch (std::exception &ex)
@ -119,6 +131,7 @@ void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count
if (counter > howmany)
break;
log->info("Hello logger: msg number {}", counter);
//std::this_thread::sleep_for(std::chrono::milliseconds(1000));
}
}));
}

15
example/example.vcxproj
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@ -1,5 +1,5 @@
<?xml version="1.0" encoding="utf-8"?>
<Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<ItemGroup Label="ProjectConfigurations">
<ProjectConfiguration Include="Debug|Win32">
<Configuration>Debug</Configuration>
@ -10,9 +10,6 @@
<Platform>Win32</Platform>
</ProjectConfiguration>
</ItemGroup>
<ItemGroup>
<ClCompile Include="example.cpp" />
</ItemGroup>
<ItemGroup>
<ClInclude Include="..\include\spdlog\async_logger.h" />
<ClInclude Include="..\include\spdlog\common.h" />
@ -21,7 +18,6 @@
<ClInclude Include="..\include\spdlog\details\file_helper.h" />
<ClInclude Include="..\include\spdlog\details\logger_impl.h" />
<ClInclude Include="..\include\spdlog\details\log_msg.h" />
<ClInclude Include="..\include\spdlog\details\mpmc_bounded_q.h" />
<ClInclude Include="..\include\spdlog\details\null_mutex.h" />
<ClInclude Include="..\include\spdlog\details\os.h" />
<ClInclude Include="..\include\spdlog\details\pattern_formatter_impl.h" />
@ -46,23 +42,26 @@
<ClInclude Include="..\include\spdlog\spdlog.h" />
<ClInclude Include="..\include\spdlog\tweakme.h" />
</ItemGroup>
<ItemGroup>
<ClCompile Include="bench.cpp" />
</ItemGroup>
<PropertyGroup Label="Globals">
<ProjectGuid>{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}</ProjectGuid>
<Keyword>Win32Proj</Keyword>
<RootNamespace>.</RootNamespace>
<WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
<WindowsTargetPlatformVersion>10.0.16299.0</WindowsTargetPlatformVersion>
</PropertyGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
<ConfigurationType>Application</ConfigurationType>
<UseDebugLibraries>true</UseDebugLibraries>
<PlatformToolset>v120</PlatformToolset>
<PlatformToolset>v141</PlatformToolset>
<CharacterSet>Unicode</CharacterSet>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
<ConfigurationType>Application</ConfigurationType>
<UseDebugLibraries>false</UseDebugLibraries>
<PlatformToolset>v120</PlatformToolset>
<PlatformToolset>v141</PlatformToolset>
<WholeProgramOptimization>true</WholeProgramOptimization>
<CharacterSet>Unicode</CharacterSet>
</PropertyGroup>

4
include/spdlog/details/async_logger_impl.h
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@ -44,7 +44,7 @@ inline spdlog::async_logger::async_logger(const std::string &logger_name, sink_p
inline void spdlog::async_logger::flush()
{
_async_log_helper->flush(false);//dont wat for the q to draing before returning from flush
_async_log_helper->flush();
}
// Error handler
@ -80,7 +80,7 @@ inline void spdlog::async_logger::_sink_it(details::log_msg &msg)
_async_log_helper->log(msg);
if (_should_flush_on(msg))
{
_async_log_helper->flush(false); // do async flush
_async_log_helper->flush(); // do async flush
}
}
catch (const std::exception &ex)

89
include/spdlog/details/mpmc_blocking_q.h Normal file
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@ -0,0 +1,89 @@
#pragma once
//
// Copyright(c) 2018 Gabi Melman.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)
//
// async log helper :
// multi producer-multi consumer blocking queue
// enqueue(..) - will block until room found to put the new message
// enqueue_nowait(..) - will return immediatly with false if no room left in the queue
// dequeue_for(..) - will block until the queue is not empty or timeout passed
#include <condition_variable>
#include <mutex>
#include <queue>
namespace spdlog {
namespace details {
template<typename T>
class mpmc_bounded_queue
{
public:
using item_type = T;
explicit mpmc_bounded_queue(size_t max_items) : max_items_(max_items) {}
// try to enqueue and block if no room left
void enqueue(T &&item)
{
{
std::unique_lock<std::mutex> lock(queue_mutex_);
pop_cv_.wait(lock, [this] {return this->q_.size() <= this->max_items_; });
q_.push(std::forward<T>(item));
}
push_cv_.notify_one();
}
// try to enqueue and return immdeialty false if no room left
bool enqueue_nowait(T &&item)
{
{
std::unique_lock<std::mutex> lock(queue_mutex_);
if (this->q_.size() >= this->max_items_)
{
return false;
}
q_.push(std::forward<T>(item));
}
push_cv_.notify_one();
return true;
}
// try to dequeue item. if no item found. wait upto timeout and try again
// Return true, if succeeded dequeue item, false otherwise
bool dequeue_for(T &popped_item, std::chrono::milliseconds wait_duration)
{
{
std::unique_lock<std::mutex> lock(queue_mutex_);
//push_cv_.wait(lock, [this] {return this->q_.size() > 0; });
bool found_msg = push_cv_.wait_for(lock, wait_duration, [this] {return this->q_.size() > 0; });
if (!found_msg)
{
return false;
}
popped_item = std::move(q_.front());
q_.pop();
}
pop_cv_.notify_one();
return true;
}
private:
size_t max_items_;
std::mutex queue_mutex_;
std::condition_variable push_cv_;
std::condition_variable pop_cv_;
std::queue<T> q_;
};
}
}

183
include/spdlog/details/mpmc_bounded_q.h
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@ -1,183 +0,0 @@
/*
A modified version of Bounded MPMC queue by Dmitry Vyukov.
Original code from:
http://www.1024cores.net/home/lock-free-algorithms/queues/bounded-mpmc-queue
licensed by Dmitry Vyukov under the terms below:
Simplified BSD license
Copyright (c) 2010-2011 Dmitry Vyukov. All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this list of
conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list
of conditions and the following disclaimer in the documentation and/or other materials
provided with the distribution.
THIS SOFTWARE IS PROVIDED BY DMITRY VYUKOV "AS IS" AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
SHALL DMITRY VYUKOV OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
The views and conclusions contained in the software and documentation are those of the authors and
should not be interpreted as representing official policies, either expressed or implied, of Dmitry Vyukov.
*/
/*
The code in its current form adds the license below:
Copyright(c) 2015 Gabi Melman.
Distributed under the MIT License (http://opensource.org/licenses/MIT)
*/
#pragma once
#include "../common.h"
#include <atomic>
#include <utility>
namespace spdlog {
namespace details {
template<typename T>
class mpmc_bounded_queue
{
public:
using item_type = T;
explicit mpmc_bounded_queue(size_t buffer_size)
: max_size_(buffer_size)
, buffer_(new cell_t[buffer_size])
, buffer_mask_(buffer_size - 1)
{
// queue size must be power of two
if (!((buffer_size >= 2) && ((buffer_size & (buffer_size - 1)) == 0)))
{
throw spdlog_ex("async logger queue size must be power of two");
}
for (size_t i = 0; i != buffer_size; i += 1)
{
buffer_[i].sequence_.store(i, std::memory_order_relaxed);
}
enqueue_pos_.store(0, std::memory_order_relaxed);
dequeue_pos_.store(0, std::memory_order_relaxed);
}
~mpmc_bounded_queue()
{
delete[] buffer_;
}
mpmc_bounded_queue(mpmc_bounded_queue const &) = delete;
void operator=(mpmc_bounded_queue const &) = delete;
bool enqueue(T &&data)
{
cell_t *cell;
size_t pos = enqueue_pos_.load(std::memory_order_relaxed);
for (;;)
{
cell = &buffer_[pos & buffer_mask_];
size_t seq = cell->sequence_.load(std::memory_order_acquire);
intptr_t dif = static_cast<intptr_t>(seq) - static_cast<intptr_t>(pos);
if (dif == 0)
{
if (enqueue_pos_.compare_exchange_weak(pos, pos + 1, std::memory_order_relaxed))
{
break;
}
}
else if (dif < 0)
{
return false;
}
else
{
pos = enqueue_pos_.load(std::memory_order_relaxed);
}
}
cell->data_ = std::move(data);
cell->sequence_.store(pos + 1, std::memory_order_release);
return true;
}
bool dequeue(T &data)
{
cell_t *cell;
size_t pos = dequeue_pos_.load(std::memory_order_relaxed);
for (;;)
{
cell = &buffer_[pos & buffer_mask_];
size_t seq = cell->sequence_.load(std::memory_order_acquire);
intptr_t dif = static_cast<intptr_t>(seq) - static_cast<intptr_t>(pos + 1);
if (dif == 0)
{
if (dequeue_pos_.compare_exchange_weak(pos, pos + 1, std::memory_order_relaxed))
{
break;
}
}
else if (dif < 0)
{
return false;
}
else
{
pos = dequeue_pos_.load(std::memory_order_relaxed);
}
}
data = std::move(cell->data_);
cell->sequence_.store(pos + buffer_mask_ + 1, std::memory_order_release);
return true;
}
bool is_empty()
{
size_t front, front1, back;
// try to take a consistent snapshot of front/tail.
do
{
front = enqueue_pos_.load(std::memory_order_acquire);
back = dequeue_pos_.load(std::memory_order_acquire);
front1 = enqueue_pos_.load(std::memory_order_relaxed);
} while (front != front1);
return back == front;
}
private:
struct cell_t
{
std::atomic<size_t> sequence_;
T data_;
};
size_t const max_size_;
static size_t const cacheline_size = 64;
using cacheline_pad_t = char[cacheline_size];
cacheline_pad_t pad0_;
cell_t *const buffer_;
size_t const buffer_mask_;
cacheline_pad_t pad1_;
std::atomic<size_t> enqueue_pos_;
cacheline_pad_t pad2_;
std::atomic<size_t> dequeue_pos_;
cacheline_pad_t pad3_;
};
} // namespace details
} // namespace spdlog

40
include/spdlog/sinks/test_sink.h Normal file
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@ -0,0 +1,40 @@
//
// Copyright(c) 2015 Gabi Melman.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)
//
#pragma once
#include "../details/null_mutex.h"
#include "base_sink.h"
#include <mutex>
namespace spdlog {
namespace sinks {
template<class Mutex>
class test_sink : public base_sink<Mutex>
{
public:
size_t msg_counter()
{
return msg_counter_;
}
protected:
void _sink_it(const details::log_msg &) override
{
msg_counter_++;
}
void _flush() override {}
size_t msg_counter_{ 0 };
};
using test_sink_mt = test_sink<std::mutex>;
using test_sink_st = test_sink<details::null_mutex>;
} // namespace sinks
} // namespace spdlog