274 lines
9.0 KiB
C
274 lines
9.0 KiB
C
/*
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************************************************************************
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* Copyright (c) 1997-2004, International Business Machines
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* Corporation and others. All Rights Reserved.
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************************************************************************
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*/
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#ifndef _UTIMER_H
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#define _UTIMER_H
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#if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)
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# include <windows.h>
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#else
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# include <time.h>
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# include <sys/time.h>
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# include <unistd.h>
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#endif
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/**
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* This API provides functions for performing performance measurement
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* There are 3 main usage scenarios.
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* i) Loop until a threshold time is reached:
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* Example:
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* <code>
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* typedef Params Params;
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* struct Params{
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* UChar* target;
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* int32_t targetLen;
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* const UChar* source;
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* int32_t sourceLen;
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* UNormalizationMode mode;
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* }
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* void NormFn( void* param){
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* Params* parameters = ( Params*) param;
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* UErrorCode error = U_ZERO_ERROR;
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* unorm_normalize(parameters->source, parameters->sourceLen, parameters->mode, 0, parameters->target, parameters->targetLen, &error);
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* if(U_FAILURE(error)){
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* printf("Normalization failed\n");
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* }
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* }
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*
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* int main(){
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* // time the normalization function
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* double timeTaken = 0;
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* Params param;
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* param.source // set up the source buffer
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* param.target // set up the target buffer
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* .... so on ...
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* UTimer timer;
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* // time the loop for 10 seconds at least and find out the loop count and time taken
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* timeTaken = utimer_loopUntilDone((double)10,(void*) param, NormFn, &loopCount);
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* }
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* </code>
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*
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* ii) Measure the time taken
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* Example:
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* <code>
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* double perfNormalization(NormFn fn,const char* mode,Line* fileLines,int32_t loopCount){
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* int line;
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* int loops;
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* UErrorCode error = U_ZERO_ERROR;
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* UChar* dest=NULL;
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* int32_t destCapacity=0;
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* int len =-1;
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* double elapsedTime = 0;
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* int retVal=0;
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*
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* UChar arr[5000];
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* dest=arr;
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* destCapacity = 5000;
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* UTimer start;
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*
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* // Initialize cache and ensure the data is loaded.
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* // This loop checks for errors in Normalization. Once we pass the initialization
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* // without errors we can safelly assume that there are no errors while timing the
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* // funtion
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* for (loops=0; loops<10; loops++) {
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* for (line=0; line < gNumFileLines; line++) {
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* if (opt_uselen) {
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* len = fileLines[line].len;
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* }
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*
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* retVal= fn(fileLines[line].name,len,dest,destCapacity,&error);
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* #if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)
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* if(retVal==0 ){
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* fprintf(stderr,"Normalization of string in Windows API failed for mode %s. ErrorNo: %i at line number %i\n",mode,GetLastError(),line);
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* return 0;
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* }
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* #endif
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* if(U_FAILURE(error)){
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* fprintf(stderr,"Normalization of string in ICU API failed for mode %s. Error: %s at line number %i\n",mode,u_errorName(error),line);
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* return 0;
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* }
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*
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* }
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* }
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*
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* //compute the time
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*
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* utimer_getTime(&start);
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* for (loops=0; loops<loopCount; loops++) {
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* for (line=0; line < gNumFileLines; line++) {
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* if (opt_uselen) {
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* len = fileLines[line].len;
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* }
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*
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* retVal= fn(fileLines[line].name,len,dest,destCapacity,&error);
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*
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* }
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* }
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*
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* return utimer_getElapsedSeconds(&start);
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* }
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* </code>
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*
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* iii) Let a higher level function do the calculation of confidence levels etc.
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* Example:
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* <code>
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* void perf(UTimer* timer, UChar* source, int32_t sourceLen, UChar* target, int32_t targetLen, int32_t loopCount,UNormalizationMode mode, UErrorCode* error){
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* int32_t loops;
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* for (loops=0; loops<loopCount; loops++) {
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* unorm_normalize(source,sourceLen,target, targetLen,mode,error);
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* }
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* utimer_getTime(timer);
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* }
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* void main(const char* argsc, int argv){
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* // read the file and setup the data
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* // set up options
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* UTimer start,timer1, timer2, timer3, timer4;
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* double NFDTimeTaken, NFCTimeTaken, FCDTimeTaken;
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* switch(opt){
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* case 0:
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* utimer_getTime(start);
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* perf(timer1, source,sourceLen, target, targetLen,loopCount,UNORM_NFD,&error);
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* NFDTimeTaken = utimer_getDeltaSeconds(start,timer1);
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* case 1:
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* timer_getTime(start);
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* perf(timer2,source,sourceLen,target,targetLen,loopCount,UNORM_NFC,&error);
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* NFCTimeTaken = utimer_getDeltaSeconds(start,timer2);
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* perf(timer3, source, sourceLen, target,targetLen, loopCount, UNORM_FCD,&error);
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* // ........so on .............
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* }
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* // calculate confidence levels etc and print
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*
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* }
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*
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* </code>
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*
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*/
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typedef struct UTimer UTimer;
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typedef void FuntionToBeTimed(void* param);
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#if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)
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struct UTimer{
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LARGE_INTEGER start;
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LARGE_INTEGER placeHolder;
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};
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int uprv_initFrequency(UTimer* timer)
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{
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return QueryPerformanceFrequency(&timer->placeHolder);
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}
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void uprv_start(UTimer* timer)
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{
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QueryPerformanceCounter(&timer->start);
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}
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double uprv_delta(UTimer* timer1, UTimer* timer2){
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return ((double)(timer2->start.QuadPart - timer1->start.QuadPart))/((double)timer1->placeHolder.QuadPart);
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}
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UBool uprv_compareFrequency(UTimer* timer1, UTimer* timer2){
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return (timer1->placeHolder.QuadPart == timer2->placeHolder.QuadPart);
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}
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#else
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struct UTimer{
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struct timeval start;
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struct timeval placeHolder;
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};
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int32_t uprv_initFrequency(UTimer* /*timer*/)
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{
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return 0;
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}
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void uprv_start(UTimer* timer)
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{
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gettimeofday(&timer->start, 0);
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}
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double uprv_delta(UTimer* timer1, UTimer* timer2){
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double t1, t2;
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t1 = (double)timer1->start.tv_sec + (double)timer1->start.tv_usec/(1000*1000);
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t2 = (double)timer2->start.tv_sec + (double)timer2->start.tv_usec/(1000*1000);
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return (t2-t1);
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}
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UBool uprv_compareFrequency(UTimer* /*timer1*/, UTimer* /*timer2*/){
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return TRUE;
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}
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#endif
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/**
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* Intializes the timer with the current time
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*
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* @param timer A pointer to UTimer struct to recieve the current time
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*/
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U_CAPI void U_EXPORT2
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utimer_getTime(UTimer* timer){
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uprv_initFrequency(timer);
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uprv_start(timer);
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}
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/**
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* Returns the difference in times between timer1 and timer2 by subtracting
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* timer1's time from timer2's time
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*
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* @param timer1 A pointer to UTimer struct to be used as starting time
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* @param timer2 A pointer to UTimer struct to be used as end time
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* @return Time in seconds
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*/
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U_CAPI double U_EXPORT2
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utimer_getDeltaSeconds(UTimer* timer1, UTimer* timer2){
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if(uprv_compareFrequency(timer1,timer2)){
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return uprv_delta(timer1,timer2);
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}
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/* got error return -1 */
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return -1;
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}
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/**
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* Returns the time elapsed from the starting time represented by the
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* UTimer struct pointer passed
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* @param timer A pointer to UTimer struct to be used as starting time
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* @return Time elapsed in seconds
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*/
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U_CAPI double U_EXPORT2
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utimer_getElapsedSeconds(UTimer* timer){
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UTimer temp;
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utimer_getTime(&temp);
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return uprv_delta(timer,&temp);
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}
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/**
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* Executes the function pointed to for a given time and returns exact time
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* taken and number of iterations of the loop
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* @param thresholTimeVal
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* @param loopCount output param to recieve the number of iterations
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* @param fn The funtion to be executed
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* @param param Parameters to be passed to the fn
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* @return the time elapsed in seconds
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*/
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U_CAPI double U_EXPORT2
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utimer_loopUntilDone(double thresholdTimeVal,
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int32_t* loopCount,
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FuntionToBeTimed fn,
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void* param){
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UTimer timer;
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double currentVal=0;
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*loopCount = 0;
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utimer_getTime(&timer);
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for(;currentVal<thresholdTimeVal;){
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fn(param);
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currentVal = utimer_getElapsedSeconds(&timer);
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*loopCount++;
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}
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return currentVal;
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}
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#endif
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