ndbtimer.hpp

mysql-5.0.22.tar.gz源码包

/* Copyright (C) 2003 MySQL AB

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

#ifndef NDBTIMER_H
#define NDBTIMER_H

#include <NdbTick.h>
#include <NdbOut.hpp>

// 
// Class used for measuring time and priting the results
// 
// Currently measures time in milliseconds
// 

class NdbTimer
{
public:

  NdbTimer();
  ~NdbTimer() {};

  void doStart();
  void doStop();
  void doReset();
  NDB_TICKS elapsedTime();
  void printTransactionStatistics(const char* text, 
				  int numTransactions, 
				  int numOperations);
  void printTestTimer(int numLoops, 
		      int numRecords);
  void printTotalTime(void);
private:
  NDB_TICKS startTime;
  NDB_TICKS stopTime;
};

inline NdbTimer::NdbTimer(){
  doReset();
}

inline void NdbTimer::doReset(void){
  startTime = 0;
  stopTime = 0;
}

inline void NdbTimer::doStart(void){
  startTime = NdbTick_CurrentMillisecond();
}

inline void NdbTimer::doStop(void){
  stopTime = NdbTick_CurrentMillisecond();
}

inline NDB_TICKS NdbTimer::elapsedTime(void){
  return (stopTime - startTime); 
}

inline void NdbTimer::printTransactionStatistics(const char* text, 
						 int numTransactions, 
						 int numOperations){

  // Convert to Uint32 in order to be able to print it to screen
  Uint32 lapTime = (Uint32)elapsedTime();
  ndbout_c("%i transactions, %i %s total time = %d ms\nAverage %f ms/transaction, %f ms/%s.\n%f transactions/second, %f %ss/second.\n",
	 numTransactions, numTransactions*numOperations, text, lapTime,
         ((double)lapTime/numTransactions), ((double)lapTime/(numTransactions*numOperations)), text, 
         1000.0/((double)lapTime/numOperations), 1000.0/((double)lapTime/(numTransactions*numOperations)), text);
}



inline void NdbTimer::printTestTimer(int numLoops, 
				     int numRecords){
  // Convert to Uint32 in order to be able to print it to screen
  Uint32 lapTime = (Uint32)elapsedTime();
  ndbout_c("%i loop * %i records, total time = %d ms\nAverage %f ms/loop, %f ms/record.\n%f looop/second, %f records/second.\n",
	   numLoops, numRecords, lapTime,
	   ((double)lapTime/numLoops), ((double)lapTime/(numLoops*numRecords)),
	   1000.0/((double)lapTime/numLoops), 1000.0/((double)lapTime/(numLoops*numRecords)));
}


inline void NdbTimer::printTotalTime(void){
  // Convert to Uint32 in order to be able to print it to screen
  Uint32 lapTime = (Uint32)elapsedTime();
  Uint32 secTime = lapTime/1000;
  ndbout_c("Total time : %d seconds (%d ms)\n", secTime, lapTime);
}






#endif