改进Threadglog并增加多线程写测试

来源：互联网发布：北京北大青鸟网络学校编辑：程序博客网时间：2024/05/29 09:48

写了个objectpool，很简单，就是个线程安全的队列。

#pragma once#include <iostream>#include <concurrent_vector.h>#include <concurrent_queue.h>#include <algorithm>template <typename T>class ObjectPool{public:ObjectPool(size_t chunk_size = kdefault_size, size_t chunk_num = 32): chunk_size_ (chunk_size), chunk_num_(chunk_num){allocate_chunk();}~ObjectPool(){std::for_each(all_objects_.begin(), all_objects_.end(), ObjectPool<T>::array_delete_object);}T* acquire_object(){if (free_list_.empty()){allocate_chunk();}T *obj = nullptr;free_list_.try_pop(obj);return obj;}void release_object(T* obj){if (NULL != obj)free_list_.push(obj);}protected:void allocate_chunk(){printf("%s\n", __FUNCTION__);for (int i = 0; i < chunk_num_; ++i){T* new_objects = new T(chunk_size_);all_objects_.push_back(new_objects);free_list_.push(new_objects);}}static void array_delete_object(T* obj){delete obj;}private:Concurrency::concurrent_queue<T*> free_list_;Concurrency::concurrent_vector<T*> all_objects_;int chunk_size_;                            //对象池中预分配对象个数int chunk_num_;static const size_t kdefault_size = 100;    //默认对象池大小ObjectPool(const ObjectPool<T>& src);ObjectPool<T>& operator=(const ObjectPool<T>& rhs);};

主线程开启业务线程来写：

#define GLOG_NO_ABBREVIATED_SEVERITIES#include <windows.h>#include <glog/logging.h>#include "ThreadLog.h"#include <random>#include <chrono>#include <thread>typedef std::chrono::high_resolution_clock::time_point time_point;typedef std::chrono::duration<int64_t,std::ratio<1, 1000> > millisecond;typedef std::chrono::duration<int64_t,std::ratio<1, 1000000> > microsecond;void writeLog(void* para){std::random_device rd;int lognum = *(int*)para;for (int i = 0; i < lognum; ++i){LOG(INFO) << "how are " << rd() << " cookies";}}using namespace google;int main(int argc, char* argv[]) {auto start_time = std::chrono::high_resolution_clock::now();google::InitGoogleLogging("test/testsss");google::base::Logger* mylogger = new google::ThreadLog;SetLogger(google::GLOG_INFO, mylogger);google::SetLogDestination(google::GLOG_INFO, "../Debug/Debug"); int num_cookies = 0;int lognum = 1000000;int threadNum = 1;std::thread* threads = new std::thread[threadNum];for (int i = 0; i < threadNum; ++i){threads[i] = std::thread(writeLog, &lognum);}for (int i = 0; i < threadNum; ++i){threads[i].join();}auto application_end_time = std::chrono::high_resolution_clock::now();auto application_time_us = std::chrono::duration_cast<microsecond>(application_end_time - start_time).count()/1000;LOG(INFO) << "threadglog total use " << application_time_us << "s";google::ShutdownGoogleLogging();}

单线程投递写日志一百万条用了13046s；

10个线程每个线程写一万条use 7808s；

额，忘记了，用的机子是thinkpad E431，四核 4G内存，显然还是发回来多核的优势。

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