mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-29 16:21:07 +00:00
124 lines
2.9 KiB
C
124 lines
2.9 KiB
C
/* Measure memcpy functions with large data sizes.
|
|
Copyright (C) 2016-2017 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef MEMCPY_RESULT
|
|
# define MEMCPY_RESULT(dst, len) dst
|
|
# define START_SIZE (64 * 1024)
|
|
# define MIN_PAGE_SIZE (getpagesize () + 32 * 1024 * 1024)
|
|
# define TEST_MAIN
|
|
# define TEST_NAME "memcpy"
|
|
# define TIMEOUT (20 * 60)
|
|
# include "bench-string.h"
|
|
|
|
IMPL (memcpy, 1)
|
|
#endif
|
|
|
|
typedef char *(*proto_t) (char *, const char *, size_t);
|
|
|
|
static void
|
|
do_one_test (impl_t *impl, char *dst, const char *src,
|
|
size_t len)
|
|
{
|
|
size_t i, iters = 16;
|
|
timing_t start, stop, cur;
|
|
|
|
/* Must clear the destination buffer updated by the previous run. */
|
|
for (i = 0; i < len; i++)
|
|
dst[i] = 0;
|
|
|
|
if (CALL (impl, dst, src, len) != MEMCPY_RESULT (dst, len))
|
|
{
|
|
error (0, 0, "Wrong result in function %s %p %p", impl->name,
|
|
CALL (impl, dst, src, len), MEMCPY_RESULT (dst, len));
|
|
ret = 1;
|
|
return;
|
|
}
|
|
|
|
if (memcmp (dst, src, len) != 0)
|
|
{
|
|
error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
|
|
impl->name, dst, src);
|
|
ret = 1;
|
|
return;
|
|
}
|
|
|
|
TIMING_NOW (start);
|
|
for (i = 0; i < iters; ++i)
|
|
{
|
|
CALL (impl, dst, src, len);
|
|
}
|
|
TIMING_NOW (stop);
|
|
|
|
TIMING_DIFF (cur, start, stop);
|
|
|
|
TIMING_PRINT_MEAN ((double) cur, (double) iters);
|
|
}
|
|
|
|
static void
|
|
do_test (size_t align1, size_t align2, size_t len)
|
|
{
|
|
size_t i, j;
|
|
char *s1, *s2;
|
|
|
|
align1 &= 63;
|
|
if (align1 + len >= page_size)
|
|
return;
|
|
|
|
align2 &= 63;
|
|
if (align2 + len >= page_size)
|
|
return;
|
|
|
|
s1 = (char *) (buf1 + align1);
|
|
s2 = (char *) (buf2 + align2);
|
|
|
|
for (i = 0, j = 1; i < len; i++, j += 23)
|
|
s1[i] = j;
|
|
|
|
printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
|
|
|
|
FOR_EACH_IMPL (impl, 0)
|
|
do_one_test (impl, s2, s1, len);
|
|
|
|
putchar ('\n');
|
|
}
|
|
|
|
int
|
|
test_main (void)
|
|
{
|
|
size_t i;
|
|
|
|
test_init ();
|
|
|
|
printf ("%23s", "");
|
|
FOR_EACH_IMPL (impl, 0)
|
|
printf ("\t%s", impl->name);
|
|
putchar ('\n');
|
|
|
|
for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1)
|
|
{
|
|
do_test (0, 0, i + 7);
|
|
do_test (0, 3, i + 15);
|
|
do_test (3, 0, i + 31);
|
|
do_test (3, 5, i + 63);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|