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using mpmc bounded q for async and many async optimizations

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This commit is contained in:
gabime
2014-12-05 20:25:04 +02:00
parent 754cac85ac
commit 52d02af950
7 changed files with 261 additions and 61 deletions
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127
include/spdlog/details/async_log_helper.h
View File

@@ -33,15 +33,14 @@
#pragma once
#include <thread>
#include <chrono>
#include <thread>
#include <atomic>
#include "../sinks/sink.h"
#include "../logger.h"
#include "../details/mpcs_q.h"
#include "../details/log_msg.h"
#include "../details/format.h"
#include "./mpmc_bounded_q.h"
#include "./log_msg.h"
#include "./format.h"
namespace spdlog
@@ -49,42 +48,67 @@ namespace spdlog
namespace details
{
class async_log_helper
{
// Async msg to move to/from the queue
// Movable only. should never be copied
struct async_msg
{
std::string logger_name;
level::level_enum level;
log_clock::time_point time;
std::string raw_msg_str;
log_clock::time_point time;
std::string txt;
async_msg() = default;
async_msg() = default;
~async_msg() = default;
async_msg(const async_msg&) = delete;
async_msg& operator=(async_msg& other) = delete;
async_msg(const details::log_msg& m) :
logger_name(m.logger_name),
level(m.level),
time(m.time),
raw_msg_str(m.raw.data(), m.raw.size())
time(m.time),
txt(m.raw.data(), m.raw.size())
{}
log_msg to_log_msg()
async_msg(async_msg&& other) :
logger_name(std::move(other.logger_name)),
level(std::move(other.level)),
time(std::move(other.time)),
txt(std::move(other.txt))
{}
async_msg& operator=(async_msg&& other)
{
logger_name = std::move(other.logger_name);
level = other.level;
time = std::move(other.time);
txt = std::move(other.txt);
return *this;
}
void fill_log_msg(log_msg &msg)
{
log_msg msg;
msg.clear();
msg.logger_name = logger_name;
msg.level = level;
msg.time = time;
msg.raw << raw_msg_str;
return msg;
msg.time = time;
msg.raw << txt;
}
};
public:
using q_type = details::mpsc_q < std::unique_ptr<async_msg> >;
using item_type = async_msg;
using q_type = details::mpmc_bounded_queue<item_type>;
using clock = std::chrono::steady_clock;
explicit async_log_helper(size_t max_queue_size);
explicit async_log_helper(size_t queue_size);
void log(const details::log_msg& msg);
//Stop logging and join the back thread
@@ -97,8 +121,6 @@ public:
private:
std::vector<std::shared_ptr<sinks::sink>> _sinks;
std::atomic<bool> _active;
@@ -113,18 +135,19 @@ private:
formatter_ptr _formatter;
// will throw last back thread exception or if worker hread no active
void _push_sentry();
// will throw last worker thread exception or if worker thread no active
void throw_if_bad_worker();
// worker thread loop
void _thread_loop();
void thread_loop();
// guess how much to sleep if queue is empty/full using last succesful op time as hint
static void _sleep_or_yield(const clock::time_point& last_op_time);
static void sleep_or_yield(const clock::time_point& last_op_time);
// clear all remaining messages(if any), stop the _worker_thread and join it
void _join();
void join_worker();
};
}
@@ -133,57 +156,60 @@ private:
///////////////////////////////////////////////////////////////////////////////
// async_sink class implementation
///////////////////////////////////////////////////////////////////////////////
inline spdlog::details::async_log_helper::async_log_helper(size_t max_queue_size)
inline spdlog::details::async_log_helper::async_log_helper(size_t queue_size)
:_sinks(),
_active(true),
_q(max_queue_size),
_worker_thread(&async_log_helper::_thread_loop, this)
_q(queue_size),
_worker_thread(&async_log_helper::thread_loop, this)
{}
inline spdlog::details::async_log_helper::~async_log_helper()
{
_join();
join_worker();
}
//Try to push and block until succeeded
inline void spdlog::details::async_log_helper::log(const details::log_msg& msg)
{
_push_sentry();
throw_if_bad_worker();
//Only if queue is full, enter wait loop
if (!_q.push(std::unique_ptr < async_msg >(new async_msg(msg))))
{
//if (!_q.push(std::unique_ptr < async_msg >(new async_msg(msg))))
//async_msg* as = new async_msg(msg);
//if (!_q.enqueue(std::unique_ptr<async_msg>(new async_msg(msg))))
if (!_q.enqueue(std::move(async_msg(msg))))
{
auto last_op_time = clock::now();
do
{
_sleep_or_yield(last_op_time);
sleep_or_yield(last_op_time);
}
while (!_q.push(std::unique_ptr < async_msg >(new async_msg(msg))));
while (!_q.enqueue(std::move(async_msg(msg))));
}
}
inline void spdlog::details::async_log_helper::_thread_loop()
inline void spdlog::details::async_log_helper::thread_loop()
{
log_msg popped_log_msg;
clock::time_point last_pop = clock::now();
size_t counter = 0;
while (_active)
{
q_type::item_type popped_msg;
if (_q.pop(popped_msg))
{
if (_q.dequeue(popped_msg))
{
last_pop = clock::now();
try
{
details::log_msg log_msg = popped_msg->to_log_msg();
_formatter->format(log_msg);
popped_msg.fill_log_msg(popped_log_msg);
_formatter->format(popped_log_msg);
for (auto &s : _sinks)
s->log(log_msg);
s->log(popped_log_msg);
}
catch (const std::exception& ex)
{
@@ -196,8 +222,8 @@ inline void spdlog::details::async_log_helper::_thread_loop()
}
// sleep or yield if queue is empty.
else
{
_sleep_or_yield(last_pop);
{
sleep_or_yield(last_pop);
}
}
}
@@ -226,6 +252,7 @@ inline void spdlog::details::async_log_helper::set_formatter(formatter_ptr msg_f
inline void spdlog::details::async_log_helper::shutdown(const log_clock::duration& timeout)
{
/*
if (timeout > std::chrono::milliseconds::zero())
{
auto until = log_clock::now() + timeout;
@@ -234,12 +261,13 @@ inline void spdlog::details::async_log_helper::shutdown(const log_clock::duratio
std::this_thread::sleep_for(std::chrono::milliseconds(5));
}
}
_join();
join_worker();
*/
}
// Sleep or yield using the time passed since last message as a hint
inline void spdlog::details::async_log_helper::_sleep_or_yield(const clock::time_point& last_op_time)
inline void spdlog::details::async_log_helper::sleep_or_yield(const clock::time_point& last_op_time)
{
using std::chrono::milliseconds;
using std::this_thread::sleep_for;
@@ -255,7 +283,8 @@ inline void spdlog::details::async_log_helper::_sleep_or_yield(const clock::time
yield();
}
inline void spdlog::details::async_log_helper::_push_sentry()
//throw if the worker thread threw an exception or not active
inline void spdlog::details::async_log_helper::throw_if_bad_worker()
{
if (_last_workerthread_ex)
{
@@ -264,11 +293,11 @@ inline void spdlog::details::async_log_helper::_push_sentry()
throw *ex;
}
if (!_active)
throw(spdlog_ex("async_sink not active"));
throw(spdlog_ex("async logger is not active"));
}
inline void spdlog::details::async_log_helper::_join()
inline void spdlog::details::async_log_helper::join_worker()
{
_active = false;
if (_worker_thread.joinable())

4
include/spdlog/details/format.h
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@@ -1050,7 +1050,7 @@ public:
{
default:
assert(false);
// Fall through.
// Fall through.
case Arg::INT:
return FMT_DISPATCH(visit_int(arg.int_value));
case Arg::UINT:
@@ -2219,7 +2219,7 @@ void BasicWriter<Char>::write_double(
// MSVC's printf doesn't support 'F'.
type = 'f';
#endif
// Fall through.
// Fall through.
case 'E':
case 'G':
case 'A':

1
include/spdlog/details/line_logger.h
View File

@@ -65,7 +65,6 @@ public:
{
_log_msg.logger_name = _callback_logger->name();
_log_msg.time = log_clock::now();
//_log_msg.tm_time = details::os::localtime(log_clock::to_time_t(_log_msg.time));
_callback_logger->_log_msg(_log_msg);
}
}

9
include/spdlog/details/log_msg.h
View File

@@ -37,7 +37,7 @@ struct log_msg
log_msg(level::level_enum l):
logger_name(),
level(l),
time(),
time(),
raw(),
formatted() {}
@@ -57,7 +57,7 @@ struct log_msg
log_msg(log_msg&& other) :
logger_name(std::move(other.logger_name)),
level(other.level),
time(std::move(other.time)),
time(std::move(other.time)),
raw(std::move(other.raw)),
formatted(std::move(other.formatted))
{
@@ -71,15 +71,13 @@ struct log_msg
logger_name = std::move(other.logger_name);
level = other.level;
time = std::move(other.time);
time = std::move(other.time);
raw = std::move(other.raw);
formatted = std::move(other.formatted);
other.clear();
return *this;
}
void clear()
{
level = level::OFF;
@@ -90,7 +88,6 @@ struct log_msg
std::string logger_name;
level::level_enum level;
log_clock::time_point time;
//std::tm tm_time;
fmt::MemoryWriter raw;
fmt::MemoryWriter formatted;
};

175
include/spdlog/details/mpmc_bounded_q.h Normal file
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@@ -0,0 +1,175 @@
/*
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:
spdlog - an extremely fast and easy to use c++11 logging library.
Copyright (c) 2014 Gabi Melman.
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#pragma once
#include <atomic>
#include "../common.h"
namespace spdlog
{
namespace details
{
template<typename T>
class mpmc_bounded_queue
{
public:
using item_type = T;
mpmc_bounded_queue(size_t 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_;
}
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 = (intptr_t)seq - (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 = (intptr_t)seq - (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;
}
private:
struct cell_t
{
std::atomic<size_t> sequence_;
T data_;
};
static size_t const cacheline_size = 64;
typedef char cacheline_pad_t [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_;
mpmc_bounded_queue(mpmc_bounded_queue const&);
void operator = (mpmc_bounded_queue const&);
};
} // ns details
} // ns spdlog

4
include/spdlog/details/pattern_formatter_impl.h
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@@ -458,7 +458,7 @@ inline void spdlog::pattern_formatter::handle_flag(char flag)
{
switch (flag)
{
// logger name
// logger name
case 'n':
_formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::name_formatter()));
break;
@@ -574,7 +574,7 @@ inline void spdlog::pattern_formatter::format(details::log_msg& msg)
{
try
{
auto tm_time = details::os::localtime(log_clock::to_time_t(msg.time));
auto tm_time = details::os::localtime(log_clock::to_time_t(msg.time));
for (auto &f : _formatters)
{
f->format(msg, tm_time);

2
include/spdlog/sinks/ostream_sink.h
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@@ -24,7 +24,7 @@
#pragma once
#include <ostream>
#include <ostream>
#include <mutex>
#include <memory>