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/**** EXAMPLE SPECIFIC SECTION ****************************/
#define ARGS 2
extern int goal(int x, int n);
extern int goal_res(int x);
int x; int n;
#define READARGS x = atoi(argv[1]); n = atoi(argv[2])
#define CALLSOURCE goal (x, n)
#define CALLRESID goal_res(x)
#define FORMATRESULT "%d"
/**** END OF EXAMPLE SPECIFIC SECTION *********************/
#include <sys/times.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char* argv[]) {
if (argc < ARGS + 2) {
fprintf(stderr, "Usage: %s repeat arg1 ... arg%d\n", argv[0], ARGS);
return -1;
} else {
struct tms tsourcestart, tsourcestop, tresstart, tresstop;
double tsourceuser, tsourcesys, tresuser, tressys;
long clk_tck;
int i, repeat;
repeat = atoi(argv[1]); argv++;
READARGS;
fprintf(stderr, "Timing source program...\n");
times(&tsourcestart);
for (i = 0; i < repeat; i++) CALLSOURCE;
times(&tsourcestop);
printf("Source result: " FORMATRESULT "\n", CALLSOURCE);
fprintf(stderr, "Timing residual program...\n");
times(&tresstart);
for (i = 0; i < repeat; i++) CALLRESID;
times(&tresstop);
printf("Residual result: " FORMATRESULT "\n", CALLRESID);
fprintf(stderr, "Done.\n");
clk_tck = sysconf(_SC_CLK_TCK);
tsourceuser = (double)(tsourcestop.tms_utime - tsourcestart.tms_utime) /
(double)clk_tck;
tsourcesys = (double)(tsourcestop.tms_stime - tsourcestart.tms_stime) /
(double)clk_tck;
tresuser = (double)(tresstop.tms_utime - tresstart.tms_utime) /
(double)clk_tck;
tressys = (double)(tresstop.tms_stime - tresstart.tms_stime) /
(double)clk_tck;
printf("\n User time (System time )\n");
printf("Source program %6.5g seconds (%6.5g seconds)\n",
tsourceuser, tsourcesys);
printf("Residual program %6.5g seconds (%6.5g seconds)\n",
tresuser, tressys);
printf("Speedup factor %6.1f (%6.1f )\n",
tresuser == 0.0 ? 1.0 : tsourceuser / tresuser,
tressys == 0.0 ? 1.0 : tsourcesys / tressys);
}
return 0;
}
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