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benchtests: Improve bench-strnlen.c

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1. Output results in json format so its easier to parse
2. Increase max alignment to `getpagesize () - 1` to make it possible
   to test page cross cases.
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
This commit is contained in:
Noah Goldstein 2022-05-23 17:41:55 -05:00
parent efeb2bd1ab
commit a01a13601c
1 changed files with 52 additions and 25 deletions
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77
benchtests/bench-strnlen.c
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@ -25,6 +25,7 @@
# define memchr_strnlen wcschr_wcsnlen
#endif /* WIDE */
#include "bench-string.h"
#include "json-lib.h"
#define BIG_CHAR MAX_CHAR
@ -49,15 +50,16 @@ IMPL (memchr_strnlen, 0)
IMPL (generic_strnlen, 0)
static void
do_one_test (impl_t *impl, const CHAR *s, size_t maxlen, size_t exp_len)
do_one_test (json_ctx_t *json_ctx, impl_t *impl, const CHAR *s, size_t maxlen,
size_t exp_len)
{
size_t len = CALL (impl, s, maxlen), i, iters = INNER_LOOP_ITERS_LARGE;
timing_t start, stop, cur;
if (len != exp_len)
{
error (0, 0, "Wrong result in function %s %zd %zd", impl->name,
len, exp_len);
error (0, 0, "Wrong result in function %s %zd %zd", impl->name, len,
exp_len);
ret = 1;
return;
}
@ -71,76 +73,101 @@ do_one_test (impl_t *impl, const CHAR *s, size_t maxlen, size_t exp_len)
TIMING_DIFF (cur, start, stop);
TIMING_PRINT_MEAN ((double) cur, (double) iters);
json_element_double (json_ctx, (double) cur / (double) iters);
}
static void
do_test (size_t align, size_t len, size_t maxlen, int max_char)
do_test (json_ctx_t *json_ctx, size_t align, size_t len, size_t maxlen,
int max_char)
{
size_t i;
align &= 63;
align &= getpagesize () - 1;
if ((align + len) * sizeof (CHAR) >= page_size)
return;
CHAR *buf = (CHAR *) (buf1);
json_element_object_begin (json_ctx);
json_attr_uint (json_ctx, "len", len);
json_attr_uint (json_ctx, "maxlen", maxlen);
json_attr_uint (json_ctx, "max_char", max_char);
json_attr_uint (json_ctx, "align", align);
json_array_begin (json_ctx, "timings");
for (i = 0; i < len; ++i)
buf[align + i] = 1 + 7 * i % max_char;
buf[align + len] = 0;
printf ("Length %4zd, alignment %2zd:", len, align);
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, (CHAR *) (buf + align), maxlen, MIN (len, maxlen));
do_one_test (json_ctx, impl, (CHAR *) (buf + align), maxlen,
MIN (len, maxlen));
putchar ('\n');
json_array_end (json_ctx);
json_element_object_end (json_ctx);
}
int
test_main (void)
{
size_t i;
json_ctx_t json_ctx;
test_init ();
printf ("%20s", "");
json_init (&json_ctx, 0, stdout);
json_document_begin (&json_ctx);
json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
json_attr_object_begin (&json_ctx, "functions");
json_attr_object_begin (&json_ctx, TEST_NAME);
json_attr_string (&json_ctx, "bench-variant", "");
json_array_begin (&json_ctx, "ifuncs");
FOR_EACH_IMPL (impl, 0)
printf ("\t%s", impl->name);
putchar ('\n');
json_element_string (&json_ctx, impl->name);
json_array_end (&json_ctx);
json_array_begin (&json_ctx, "results");
for (i = 1; i < 8; ++i)
{
do_test (0, i, i - 1, MIDDLE_CHAR);
do_test (0, i, i, MIDDLE_CHAR);
do_test (0, i, i + 1, MIDDLE_CHAR);
do_test (&json_ctx, 0, i, i - 1, MIDDLE_CHAR);
do_test (&json_ctx, 0, i, i, MIDDLE_CHAR);
do_test (&json_ctx, 0, i, i + 1, MIDDLE_CHAR);
}
for (i = 1; i < 8; ++i)
{
do_test (i, i, i - 1, MIDDLE_CHAR);
do_test (i, i, i, MIDDLE_CHAR);
do_test (i, i, i + 1, MIDDLE_CHAR);
do_test (&json_ctx, i, i, i - 1, MIDDLE_CHAR);
do_test (&json_ctx, i, i, i, MIDDLE_CHAR);
do_test (&json_ctx, i, i, i + 1, MIDDLE_CHAR);
}
for (i = 2; i <= 10; ++i)
{
do_test (0, 1 << i, 5000, MIDDLE_CHAR);
do_test (1, 1 << i, 5000, MIDDLE_CHAR);
do_test (&json_ctx, 0, 1 << i, 5000, MIDDLE_CHAR);
do_test (&json_ctx, 1, 1 << i, 5000, MIDDLE_CHAR);
}
for (i = 1; i < 8; ++i)
do_test (0, i, 5000, BIG_CHAR);
do_test (&json_ctx, 0, i, 5000, BIG_CHAR);
for (i = 1; i < 8; ++i)
do_test (i, i, 5000, BIG_CHAR);
do_test (&json_ctx, i, i, 5000, BIG_CHAR);
for (i = 2; i <= 10; ++i)
{
do_test (0, 1 << i, 5000, BIG_CHAR);
do_test (1, 1 << i, 5000, BIG_CHAR);
do_test (&json_ctx, 0, 1 << i, 5000, BIG_CHAR);
do_test (&json_ctx, 1, 1 << i, 5000, BIG_CHAR);
}
json_array_end (&json_ctx);
json_attr_object_end (&json_ctx);
json_attr_object_end (&json_ctx);
json_document_end (&json_ctx);
return ret;
}