void
timer_ratio(timedelta_t *a, timedelta_t *b, char *buf, size_t buflen)
{
uint64_t t0 = timer_usec(a);
uint64_t t1 = timer_usec(b);
uint64_t mult;
size_t i = 0;
size_t j, n;
/* Whole. */
n = malloc_snprintf(&buf[i], buflen-i, "%"FMTu64, t0 / t1);
i += n;
if (i >= buflen)
return;
mult = 1;
for (j = 0; j < n; j++)
mult *= 10;
/* Decimal. */
n = malloc_snprintf(&buf[i], buflen-i, ".");
i += n;
/* Fraction. */
while (i < buflen-1) {
uint64_t round = (i+1 == buflen-1 && ((t0 * mult * 10 / t1) % 10
>= 5)) ? 1 : 0;
n = malloc_snprintf(&buf[i], buflen-i,
"%"FMTu64, (t0 * mult / t1) % 10 + round);
i += n;
mult *= 10;
}
}
void
compare_funcs(uint64_t nwarmup, uint64_t niter, const char *name_a,
void (*func_a), const char *name_b, void (*func_b))
{
timedelta_t timer_a, timer_b;
char ratio_buf[6];
time_func(&timer_a, nwarmup, niter, func_a);
time_func(&timer_b, nwarmup, niter, func_b);
timer_ratio(&timer_a, &timer_b, ratio_buf, sizeof(ratio_buf));
malloc_printf("%"PRIu64" iterations, %s=%"PRIu64"us, "
"%s=%"PRIu64"us, ratio=1:%s\n",
niter, name_a, timer_usec(&timer_a), name_b, timer_usec(&timer_b),
ratio_buf);
}
int main()
{
// decomp
plugin_ldpath(".");
void *pl = plugin_load("libdecomp.so");
if (!pl)
{
printf("missing plugin\n");
return 1;
}
decomp3f_init_f pl_init = (decomp3f_init_f)plugin_fn(pl, DECOMP3F_INIT_F_SYM);
decomp3f_make_f pl_make = (decomp3f_make_f)plugin_fn(pl, DECOMP3F_MAKE_F_SYM);
decomp3f_clear_f pl_clear = (decomp3f_clear_f)plugin_fn(pl, DECOMP3F_CLEAR_F_SYM);
struct decomp3f_s d;
struct decompmesh3f_s dm;
load_mesh(&dm, "../data/mushroom.off");
pl_init(&d);
uint64_t start = timer_usec();
pl_make(&d, &dm);
uint64_t end = timer_usec();
printf("decomposition took %lu usecs; sub-meshes: %d\n", static_cast<unsigned long>(end - start), static_cast<int>(d.ms));
pl_clear(&d);
plugin_unload(pl);
free(dm.f);
free(dm.v);
return 0;
}
