一个简单的C++性能测试工具(ms级别)

如何使用

#include "sperformance.h"#include <iostream>#include <boost/thread.hpp>int main(int argc, char** argv){kagula::PerformanceTest pt;{pt.start();boost::this_thread::sleep(boost::posix_time::milliseconds(0));pt.stop();std::cout << "First time:" << pt.toString() << std::endl << std::endl;}{pt.start();boost::this_thread::sleep(boost::posix_time::milliseconds(100));pt.stop();std::cout << "Second time:" << pt.toString() << std::endl << std::endl;}{pt.start();boost::this_thread::sleep(boost::posix_time::milliseconds(1000));pt.stop();std::cout << "Third time:" << pt.toString() << std::endl << std::endl;}std::cin.get();return 0;}

 

依赖的头文件

#ifndef _SPERFORMANCE_H_#define _SPERFORMANCE_H_#include <string>#include <list>#include <boost/thread/mutex.hpp>#include <boost/date_time/posix_time/posix_time.hpp>   namespace kagula{/** Title:* Description:* 以毫秒(Millisecond)为单位测试程序代码段的运行时间。* Dependencies: boost 1.61* Test Environment: VS2013 Update5* Remark: * [1]计量单位ms* [2]优点:[a]使用简单[2]只依赖boost，可以跨平台.* */struct PerformanceTest{PerformanceTest() :m_lastFPS(.0f),m_minElapsedTime(1000.0f), m_maxElapsedTime(.0f), m_lastElapsedTime(.0f){}std::string toString();void start();void stop();float getMinFPS();float getMaxFPS();float getLastFPS();float getAvgFPS();float getElapsedTime();float getAvgTime();private:float m_minFPS;float m_maxFPS;float m_lastFPS;float m_avgFPS;float m_minElapsedTime;////milli second unitfloat m_maxElapsedTime;float m_avgElapsedTime;float m_lastElapsedTime;std::list<float> m_listHistoryElapsedTime;void setInMilliSecond(unsigned long long milliSecond);boost::mutex m_mutexRW;boost::posix_time::ptime m_timeStart;};//std::string GetCurrentTime();}#endif

 

依赖的实现文件

#include "sperformance.h"#include <boost/thread/locks.hpp>#include <iomanip>namespace kagula{void PerformanceTest::start(){m_timeStart = boost::posix_time::microsec_clock::universal_time();}void PerformanceTest::stop(){boost::posix_time::ptime timeStop = boost::posix_time::microsec_clock::universal_time();boost::posix_time::millisec_posix_time_system_config::time_duration_type timeElapsed;timeElapsed = timeStop - m_timeStart;unsigned long long llElapsedTime = timeElapsed.total_milliseconds();setInMilliSecond(llElapsedTime);}void PerformanceTest::setInMilliSecond(unsigned long long milliSecond){boost::lock_guard<boost::mutex> lock(m_mutexRW);//Prevent division zero error.if (milliSecond <= 0)milliSecond = 1;m_lastElapsedTime = milliSecond;//if (m_minElapsedTime > milliSecond)m_minElapsedTime = milliSecond;m_maxFPS = 1000 / m_minElapsedTime;//if (m_maxElapsedTime < milliSecond)m_maxElapsedTime = milliSecond;m_minFPS = 1000 / m_maxElapsedTime;//m_lastFPS = 1000 / (float)milliSecond;//m_listHistoryElapsedTime.push_back(m_lastElapsedTime);std::list<float>::iterator iter = m_listHistoryElapsedTime.begin();float fTemp = .0f;while (iter != m_listHistoryElapsedTime.end()){fTemp += *iter;iter++;}m_avgElapsedTime = fTemp / m_listHistoryElapsedTime.size();m_avgFPS = 1000 / m_avgElapsedTime;if (m_listHistoryElapsedTime.size() > 1024){m_listHistoryElapsedTime.pop_front();//http://www.cplusplus.com/reference/list/list/pop_front/}}//end functionstd::string PerformanceTest::toString(){boost::lock_guard<boost::mutex> lock(m_mutexRW);std::stringstream ss;ss << "Last elapsed time is " << std::setw(5) << std::setprecision(2) << std::fixed\<< m_lastElapsedTime \<< "ms, last fps is " << m_lastFPS\<< " ,minimum elapsed time is " << m_minElapsedTime \<< "ms, maximum elapsed time is " << m_maxElapsedTime\<< "ms, avelage elapsed time is " << m_avgElapsedTime\<< "ms, average fps is " << m_avgFPS;return ss.str();}float PerformanceTest::getElapsedTime(){boost::lock_guard<boost::mutex> lock(m_mutexRW);return m_lastElapsedTime;}float PerformanceTest::getAvgTime(){boost::lock_guard<boost::mutex> lock(m_mutexRW);return m_avgElapsedTime;}float PerformanceTest::getAvgFPS(){boost::lock_guard<boost::mutex> lock(m_mutexRW);return m_avgFPS;}float PerformanceTest::getMinFPS(){boost::lock_guard<boost::mutex> lock(m_mutexRW);return m_minFPS;}float PerformanceTest::getMaxFPS(){boost::lock_guard<boost::mutex> lock(m_mutexRW);return m_maxFPS;}float PerformanceTest::getLastFPS(){boost::lock_guard<boost::mutex> lock(m_mutexRW);return m_lastFPS;}boost::mutex g_mutexGetCurrentTime;std::string GetCurrentTime(){boost::lock_guard<boost::mutex> lock(g_mutexGetCurrentTime);//下面这段代码可能会导致boost::log多线程冲突问题boost::posix_time::time_facet* p_tfacet = new boost::posix_time::time_facet("%Y-%m-%d %H:%M:%S%F");std::stringstream ss;ss.imbue(std::locale(ss.getloc(), p_tfacet));ss << "[" << boost::posix_time::microsec_clock::local_time() << "]: ";return ss.str();}}