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Make number of iterations controllable via the second command-line

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argument.
(gettime): Use clock_gettime() instead of gettimeofday() to get
	(potentially) better resolution.

(Logical change 1.186)
This commit is contained in:
mostang.com!davidm 2004-03-20 09:54:28 +00:00
parent 89b3ee87a9
commit c7fdc72fd6
1 changed files with 17 additions and 13 deletions
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30
tests/Gperf-simple.c
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@ -24,24 +24,23 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <time.h>
#include <libunwind.h>
#define ITERATIONS 10000
#define panic(args...) \
do { fprintf (stderr, args); exit (-1); } while (0)
static long iterations = 10000;
static int maxlevel = 100;
static inline double
gettime (void)
{
struct timeval tv;
struct timespec ts;
gettimeofday(&tv, NULL);
return tv.tv_sec + 1e-6*tv.tv_usec;
clock_gettime(CLOCK_REALTIME, &ts);
return ts.tv_sec + 1e-9*ts.tv_nsec;
}
static int
@ -93,12 +92,13 @@ f1 (int level, int maxlevel, double *init, double *step)
static void
doit (const char *label)
{
double init, step, min_init, first_init, min_step, first_step, sum_init, sum_step;
double init, step, min_init, first_init, min_step, first_step;
double sum_init, sum_step;
int i;
sum_init = sum_step = first_init = first_step = 0.0;
min_init = min_step = 1e99;
for (i = 0; i < ITERATIONS; ++i)
for (i = 0; i < iterations; ++i)
{
f1 (0, maxlevel, &init, &step);
@ -117,18 +117,22 @@ doit (const char *label)
}
}
printf ("%s:\n"
" unw_{getcontext+init_local}: first=%9.3f min=%9.3f avg=%9.3f nsec\n"
" unw_step : first=%9.3f min=%9.3f avg=%9.3f nsec\n",
" unw_{getcontext+init_local}: 1st=%9.3f min=%9.3f avg=%9.3f nsec\n"
" unw_step : 1st=%9.3f min=%9.3f avg=%9.3f nsec\n",
label,
1e9*first_init, 1e9*min_init, 1e9*sum_init/ITERATIONS,
1e9*first_step, 1e9*min_step, 1e9*sum_step/ITERATIONS);
1e9*first_init, 1e9*min_init, 1e9*sum_init/iterations,
1e9*first_step, 1e9*min_step, 1e9*sum_step/iterations);
}
int
main (int argc, char **argv)
{
if (argc > 1)
maxlevel = atol (argv[1]);
{
maxlevel = atol (argv[1]);
if (argc > 2)
iterations = atol (argv[2]);
}
unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_NONE);
doit ("Caching: none");