mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-09 23:00:07 +00:00
257 lines
7.0 KiB
C
257 lines
7.0 KiB
C
/* Measure memchr functions.
|
|
Copyright (C) 2013-2024 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
|