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Power-Programmierung (Tewi)(1994).iso
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imc9106
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hrtimer.c
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1991-05-09
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/*********************************************************************
* HRTIMER.C - This program times the execution of two functions that *
* reside in the file TESTFUNC.C. You compile TESTFUNC.C using the *
* type of optimization you wish to test. However, the switches you *
* use to compile this file, TIMER.C, and the high-resolution timer *
* functions in STOPWATC.C should remain constant for all tests. *
* *
* Without opt: cl /Ox TIMER.C STOPWATC.C /Od TESTFUNC.C *
* With opt : cl /Ox TIMER.C STOPWATC.C /Ozax TESTFUNC.C *
* *
*********************************************************************/
#include <stdio.h> /* printf(), puts() */
#include "stopwatc.h"
#define FALSE 0
#define TRUE 0
#define DEF_ITERATIONS 1000L
#define MICROSECONDS (double)1000000L
/*----This macro performs the standard timing loop for all tests----*/
#define TIME_IT( funcname, total ) \
for(iterations=setting ; iterations; iterations--) \
{ \
start = StartTimer(); \
funcname; \
end = StopTimer(); \
total += end - start; \
}
int testfunc1(void);
int testfunc2(void);
void emptyfunc(void);
void cdecl main(int argc, char **argv);
/*********************************************************************
* main() - Main body of program HRTIMER.C *
*********************************************************************/
void cdecl main(int argc, char **argv)
{
ULONG start=0, end=0, control_start=0, control_end=0;
ULONG iterations, setting=DEF_ITERATIONS;
UINT def = FALSE;
double test1=0, test2=0, empty=0, op1, op2;
HRInit( CODETIME ); /* Initialize StopWatch functions */
/*-------- Get iterations from command line, if given ----------*/
if (argc < 2)
def = TRUE;
else
{
if(!atol(argv[1]))
def = TRUE;
else
setting = atol(argv[1]);
}
/*-------- Show number of iterations on screen -----------------*/
if(def)
printf("Testing with default iterations: %lu\n",setting);
else
printf("Testing with %lu iterations\n",setting);
/*-------- Determine time required for empty function ----------*/
puts("Timing empty function...");
TIME_IT( emptyfunc(), empty );
/*-------- Time the first test function ------------------------*/
puts("Testing testfunc1...");
TIME_IT( testfunc1(), test1 );
op1 = test1 - empty;
/*-------- Time the second test function -----------------------*/
puts("Testing testfunc2...");
TIME_IT( testfunc2(), test2 );
op2 = test2 - empty;
/*-------- Show results ----------------------------------------*/
printf("Test end:\n");
printf("Empty function : %04.5f Sec.", empty/COUNTS_PER_SEC);
printf(" %f uSec. each\n", empty/setting/COUNTS_PER_uSEC );
printf("testfunc1 Gross: %04.5f Sec.\n", test1/COUNTS_PER_SEC);
printf("testfunc1 Net : %04.5f Sec.", op1/COUNTS_PER_SEC);
printf(", %f uSec. each\n", op1/setting/COUNTS_PER_uSEC);
printf("testfunc2 Gross: %04.5f Sec.\n", test2/COUNTS_PER_SEC);
printf("testfunc2 Net : %04.5f Sec.", op2/COUNTS_PER_SEC);
printf(", %f uSec. each\n", op2/setting/COUNTS_PER_uSEC);
HRTerm(); /* Set PIT counter 0 to mode 3 */
}