mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 22:10:13 +00:00
2623479105
Adjust iteration counts so benchmarks don't run too slowly or quickly. Ensure benchmarks take less than 10 seconds on older, slower cores and more than 0.5 seconds on fast cores. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
257 lines
7.0 KiB
C
257 lines
7.0 KiB
C
/* Measure memchr functions.
|
|
Copyright (C) 2013-2023 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include "json-lib.h"
|
|
|
|
#ifndef WIDE
|
|
# define SMALL_CHAR 127
|
|
#else
|
|
# define SMALL_CHAR 1273
|
|
#endif /* WIDE */
|
|
|
|
#ifndef USE_AS_MEMRCHR
|
|
# define TEST_MAIN
|
|
# ifndef WIDE
|
|
# define TEST_NAME "memchr"
|
|
# else
|
|
# define TEST_NAME "wmemchr"
|
|
# endif /* WIDE */
|
|
# include "bench-string.h"
|
|
|
|
typedef void *(*proto_t) (const void *, int, size_t);
|
|
|
|
void *
|
|
generic_memchr (const void *, int, size_t);
|
|
|
|
IMPL (MEMCHR, 1)
|
|
|
|
# ifndef WIDE
|
|
IMPL (generic_memchr, 0)
|
|
# endif
|
|
|
|
#endif /* !USE_AS_MEMRCHR */
|
|
|
|
|
|
static void
|
|
do_one_test (json_ctx_t *json_ctx, impl_t *impl, const CHAR *s, int c,
|
|
size_t n)
|
|
{
|
|
size_t i, iters = INNER_LOOP_ITERS8 / 2;
|
|
timing_t start, stop, cur;
|
|
|
|
TIMING_NOW (start);
|
|
for (i = 0; i < iters; ++i)
|
|
{
|
|
CALL (impl, s, c, n);
|
|
}
|
|
TIMING_NOW (stop);
|
|
|
|
TIMING_DIFF (cur, start, stop);
|
|
|
|
json_element_double (json_ctx, (double) cur / (double) iters);
|
|
}
|
|
|
|
static void
|
|
do_test (json_ctx_t *json_ctx, size_t align, size_t pos, size_t len,
|
|
int seek_char, int invert_pos)
|
|
{
|
|
size_t i;
|
|
|
|
align &= getpagesize () - 1;
|
|
if ((align + len) * sizeof (CHAR) >= page_size)
|
|
return;
|
|
|
|
CHAR *buf = (CHAR *) (buf1);
|
|
|
|
for (i = 0; i < len; ++i)
|
|
{
|
|
buf[align + i] = 1 + 23 * i % SMALL_CHAR;
|
|
if (buf[align + i] == seek_char)
|
|
buf[align + i] = seek_char + 1;
|
|
}
|
|
buf[align + len] = 0;
|
|
|
|
if (pos < len)
|
|
{
|
|
if (invert_pos)
|
|
buf[align + len - pos] = seek_char;
|
|
else
|
|
buf[align + pos] = seek_char;
|
|
buf[align + len] = -seek_char;
|
|
}
|
|
else
|
|
{
|
|
buf[align + len] = seek_char;
|
|
}
|
|
|
|
json_element_object_begin (json_ctx);
|
|
json_attr_uint (json_ctx, "align", align);
|
|
json_attr_uint (json_ctx, "pos", pos);
|
|
json_attr_uint (json_ctx, "len", len);
|
|
json_attr_uint (json_ctx, "seek_char", seek_char);
|
|
json_attr_uint (json_ctx, "invert_pos", invert_pos);
|
|
|
|
json_array_begin (json_ctx, "timings");
|
|
|
|
FOR_EACH_IMPL (impl, 0)
|
|
do_one_test (json_ctx, impl, (CHAR *) (buf + align), seek_char, len);
|
|
|
|
json_array_end (json_ctx);
|
|
json_element_object_end (json_ctx);
|
|
}
|
|
|
|
int
|
|
test_main (void)
|
|
{
|
|
size_t i, j, al, al_max;
|
|
int repeats;
|
|
json_ctx_t json_ctx;
|
|
test_init ();
|
|
|
|
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)
|
|
json_element_string (&json_ctx, impl->name);
|
|
json_array_end (&json_ctx);
|
|
|
|
json_array_begin (&json_ctx, "results");
|
|
|
|
al_max = 0;
|
|
#ifdef USE_AS_MEMRCHR
|
|
al_max = getpagesize () / 2;
|
|
#endif
|
|
|
|
for (repeats = 0; repeats < 2; ++repeats)
|
|
{
|
|
for (al = 0; al <= al_max; al += getpagesize () / 2)
|
|
{
|
|
for (i = 1; i < 8; ++i)
|
|
{
|
|
do_test (&json_ctx, al, 16 << i, 2048, 23, repeats);
|
|
do_test (&json_ctx, al + i, 64, 256, 23, repeats);
|
|
do_test (&json_ctx, al, 16 << i, 2048, 0, repeats);
|
|
do_test (&json_ctx, al + i, 64, 256, 0, repeats);
|
|
|
|
do_test (&json_ctx, al + getpagesize () - 15, 64, 256, 0,
|
|
repeats);
|
|
#ifdef USE_AS_MEMRCHR
|
|
/* Also test the position close to the beginning for memrchr. */
|
|
do_test (&json_ctx, al, i, 256, 23, repeats);
|
|
do_test (&json_ctx, al, i, 256, 0, repeats);
|
|
do_test (&json_ctx, al + i, i, 256, 23, repeats);
|
|
do_test (&json_ctx, al + i, i, 256, 0, repeats);
|
|
#endif
|
|
}
|
|
for (i = 1; i < 8; ++i)
|
|
{
|
|
do_test (&json_ctx, al + i, i << 5, 192, 23, repeats);
|
|
do_test (&json_ctx, al + i, i << 5, 192, 0, repeats);
|
|
do_test (&json_ctx, al + i, i << 5, 256, 23, repeats);
|
|
do_test (&json_ctx, al + i, i << 5, 256, 0, repeats);
|
|
do_test (&json_ctx, al + i, i << 5, 512, 23, repeats);
|
|
do_test (&json_ctx, al + i, i << 5, 512, 0, repeats);
|
|
|
|
do_test (&json_ctx, al + getpagesize () - 15, i << 5, 256, 23,
|
|
repeats);
|
|
}
|
|
}
|
|
|
|
for (i = 1; i < 32; ++i)
|
|
{
|
|
do_test (&json_ctx, 0, i, i + 1, 23, repeats);
|
|
do_test (&json_ctx, 0, i, i + 1, 0, repeats);
|
|
do_test (&json_ctx, i, i, i + 1, 23, repeats);
|
|
do_test (&json_ctx, i, i, i + 1, 0, repeats);
|
|
do_test (&json_ctx, 0, i, i - 1, 23, repeats);
|
|
do_test (&json_ctx, 0, i, i - 1, 0, repeats);
|
|
do_test (&json_ctx, i, i, i - 1, 23, repeats);
|
|
do_test (&json_ctx, i, i, i - 1, 0, repeats);
|
|
|
|
do_test (&json_ctx, getpagesize () / 2, i, i + 1, 23, repeats);
|
|
do_test (&json_ctx, getpagesize () / 2, i, i + 1, 0, repeats);
|
|
do_test (&json_ctx, getpagesize () / 2 + i, i, i + 1, 23, repeats);
|
|
do_test (&json_ctx, getpagesize () / 2 + i, i, i + 1, 0, repeats);
|
|
do_test (&json_ctx, getpagesize () / 2, i, i - 1, 23, repeats);
|
|
do_test (&json_ctx, getpagesize () / 2, i, i - 1, 0, repeats);
|
|
do_test (&json_ctx, getpagesize () / 2 + i, i, i - 1, 23, repeats);
|
|
do_test (&json_ctx, getpagesize () / 2 + i, i, i - 1, 0, repeats);
|
|
|
|
do_test (&json_ctx, getpagesize () - 15, i, i - 1, 23, repeats);
|
|
do_test (&json_ctx, getpagesize () - 15, i, i - 1, 0, repeats);
|
|
|
|
do_test (&json_ctx, getpagesize () - 15, i, i + 1, 23, repeats);
|
|
do_test (&json_ctx, getpagesize () - 15, i, i + 1, 0, repeats);
|
|
|
|
#ifdef USE_AS_MEMRCHR
|
|
do_test (&json_ctx, 0, 1, i + 1, 23, repeats);
|
|
do_test (&json_ctx, 0, 2, i + 1, 0, repeats);
|
|
#endif
|
|
}
|
|
for (al = 0; al <= al_max; al += getpagesize () / 2)
|
|
{
|
|
for (i = (16 / sizeof (CHAR)); i <= (8192 / sizeof (CHAR)); i += i)
|
|
{
|
|
for (j = 0; j <= (384 / sizeof (CHAR));
|
|
j += (32 / sizeof (CHAR)))
|
|
{
|
|
do_test (&json_ctx, al, i + j, i, 23, repeats);
|
|
do_test (&json_ctx, al, i, i + j, 23, repeats);
|
|
if (j < i)
|
|
{
|
|
do_test (&json_ctx, al, i - j, i, 23, repeats);
|
|
do_test (&json_ctx, al, i, i - j, 23, repeats);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifndef USE_AS_MEMRCHR
|
|
break;
|
|
#endif
|
|
}
|
|
|
|
json_array_end (&json_ctx);
|
|
json_attr_object_end (&json_ctx);
|
|
json_attr_object_end (&json_ctx);
|
|
json_document_end (&json_ctx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|
|
|
|
#ifndef WIDE
|
|
# ifndef USE_AS_MEMRCHR
|
|
# undef MEMCHR
|
|
# define MEMCHR generic_memchr
|
|
# include <string/memchr.c>
|
|
# else
|
|
# undef MEMRCHR
|
|
# define MEMRCHR generic_memrchr
|
|
# include <string/memrchr.c>
|
|
# endif
|
|
#endif
|