int
main(int ac, char **av)
{
int i, max_procs;
double overhead = 0;
if (ac < 2) {
usage: printf("Usage: %s [-s kbytes] processes [processes ...]\n",
av[0]);
exit(1);
}
/*
* Need 4 byte ints.
*/
if (sizeof(int) != 4) {
fprintf(stderr, "Fix sumit() in ctx.c.\n");
exit(1);
}
/*
* If they specified a context size, get it.
*/
if (!strcmp(av[1], "-s")) {
if (ac < 4) {
goto usage;
}
process_size = atoi(av[2]) * 1024;
if (process_size > 0) {
data = (int *)calloc(1, max(process_size, CHUNK));
BENCHO(sumit(CHUNK), sumit(0), 0);
overhead = gettime();
overhead /= get_n();
overhead *= process_size;
overhead /= CHUNK;
}
ac -= 2;
av += 2;
}
#if defined(sgi) && defined(PIN)
ncpus = sysmp(MP_NPROCS);
sysmp(MP_MUSTRUN, 0);
#endif
for (max_procs = atoi(av[1]), i = 1; i < ac; ++i) {
int procs = atoi(av[i]);
if (max_procs < procs) max_procs = procs;
}
max_procs = create_pipes(p, max_procs);
overhead += pipe_cost(p, max_procs);
max_procs = create_daemons(p, pids, max_procs);
fprintf(stderr, "\n\"size=%dk ovr=%.2f\n", process_size/1024, overhead);
for (i = 1; i < ac; ++i) {
double time;
int procs = atoi(av[i]);
if (procs > max_procs) continue;
BENCH(ctx(procs, max_procs), 0);
time = usecs_spent();
time /= get_n();
time /= procs;
time /= TRIPS;
time -= overhead;
fprintf(stderr, "%d %.2f\n", procs, time);
}
/*
* Close the pipes and kill the children.
*/
killem(max_procs);
for (i = 0; i < max_procs; ++i) {
close(p[i][0]);
close(p[i][1]);
if (i > 0) {
wait(0);
}
}
return (0);
}
void fatal_error(char *err) {
killem();
fprintf(stderr, "FATAL ERROR: %s\n", err);
exit(1);
}
