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/* time.c -- produce a 1-page summary of cpu times of various C constructs
* prints ? after CPU times if separate trials differ my more than
* WARNRANGE times the mean. Increase MINCLICKS (below) if this happens.
* Possible portability problems
* might need to change jobclicks()
* microseconds column will have systematic errors if CLICKS_SEC is wrong
*/
#include <stdio.h>
#include <math.h>
#define WARNRANGE 0.4
#define EXTERN /* instantiate data here */
#include "test_mpd.h"
#ifdef _POSIX_SOURCE
#include <time.h>
int jobclicks()
{
return (int) clock();
}
#else
#include <sys/types.h>
#include <sys/times.h>
int jobclicks()
{
struct tms buffer;
times(&buffer);
return (int) (buffer.tms_utime + buffer.tms_stime);
}
#endif
#ifdef CLOCKS_PER_SEC
#define CLICKS_SEC CLOCKS_PER_SEC
#else
#ifdef CLK_TCK
#define CLICKS_SEC CLK_TCK
#else
#ifdef HZ
#define CLICKS_SEC HZ
#else
#define CLICKS_SEC 60.0
#endif
#endif
#endif
#define MINCLICKS (20+CLICKS_SEC/4)
/* This is unused when DEBUG is not set, but here it is anyway:
*/
void zconfusion(s)
strnumber s;
{
printf("Confusion! (case %ld)\n", s);
exit(1);
}
/*************** Main macros for experiments ***************/
float lastmics, basemics; /* microsecs/iteration, same for null loop */
int loop1start, loop1ctr;
int minclicks, maxclicks, sumclicks, thisclicks;
int loop2ctr, setn_clicks;
char *queststr;
#define loop1(CODE,n) \
loop1ctr++; \
loop1start = jobclicks(); \
for (loop2ctr=0; loop2ctr<n; loop2ctr++) { CODE; } \
thisclicks = jobclicks() - loop1start; \
sumclicks += thisclicks; \
if (thisclicks < minclicks) minclicks = thisclicks; \
if (thisclicks > maxclicks) maxclicks = thisclicks; \
printf(" %7d", thisclicks); \
fflush(stdout)
#define loop(LAB,CODE,n) \
printf(" %-28s", LAB); \
minclicks = 999999999; maxclicks = -1; sumclicks = 0; \
loop1ctr = 0; \
loop1(CODE,n); \
loop1(CODE,n); \
loop1(CODE,n); \
queststr = ""; \
if (loop1ctr*(maxclicks-minclicks) > WARNRANGE*sumclicks) \
queststr = "?"; \
lastmics = sumclicks*1000000.0/((float)CLICKS_SEC*n*loop1ctr); \
printf("%10.2f%s\n", lastmics - basemics, queststr)
#define setn(CODE,n) \
n=1; \
do { n *= 10; \
setn_clicks = jobclicks(); \
for (loop2ctr=0; loop2ctr<n; loop2ctr++){CODE;} \
setn_clicks = jobclicks() - setn_clicks; \
} while (setn_clicks < MINCLICKS);
#define title(TEXT,n) printf("%s (n=%d)\n", TEXT, n)
/* The experiment */
int test_arith();
long noop(p,q) long p,q; {return 17;}
main()
{
int n;
integer j1, j2 = 314159265, j3 = 358979323, j4=846264;
if (test_arith() > 0) {
printf("***** TEST FAILED! define FIXPT in site.h ******\n");
exit(0);
}
printf(" Operation Clicks for each trial ");
printf(" Microsecs/n\n");
setn({}, n)
title("Null Loop", n);
basemics = 0.0;
loop("{}", {}, n);
basemics = lastmics;
setn(j1=qtakefraction(j2,j3),n)
title("Standard arithmetic (#define FIXPT)", n);
loop("takefraction", j1=qtakefraction(j2,j3), n);
loop("takescaled", j1=qtakescaled(j4,j4), n);
loop("makefraction", j1=qmakefraction(j2,j3), n);
loop("makescaled", j1=qmakescaled(j4,j4), n);
setn(j1=ztakefraction(j2,j3),n);
title("External arithmetic (#undef FIXPT)", n);
loop("takefraction", j1=ztakefraction(j2,j3), n);
loop("takescaled", j1=ztakescaled(j4,j4), n);
loop("makefraction", j1=zmakefraction(j2,j3), n);
loop("makescaled", j1=zmakescaled(j4,j4), n);
exit(0);
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.