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glibc/benchtests/bench-memset-large.c
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/* Measure memset functions with large data sizes. | |
Copyright (C) 2016 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/>. */ | |
#define TEST_MAIN | |
#ifndef WIDE | |
# define TEST_NAME "memset" | |
#else | |
# define TEST_NAME "wmemset" | |
#endif /* WIDE */ | |
#define START_SIZE (128 * 1024) | |
#define MIN_PAGE_SIZE (getpagesize () + 64 * 1024 * 1024) | |
#define TIMEOUT (20 * 60) | |
#include "bench-string.h" | |
#ifndef WIDE | |
# define MEMSET memset | |
# define CHAR char | |
# define SIMPLE_MEMSET simple_memset | |
# define MEMCMP memcmp | |
#else | |
# include <wchar.h> | |
# define MEMSET wmemset | |
# define CHAR wchar_t | |
# define SIMPLE_MEMSET simple_wmemset | |
# define MEMCMP wmemcmp | |
#endif /* WIDE */ | |
#include <assert.h> | |
IMPL (MEMSET, 1) | |
typedef CHAR *(*proto_t) (CHAR *, int, size_t); | |
CHAR * | |
inhibit_loop_to_libcall | |
SIMPLE_MEMSET (CHAR *s, int c, size_t n) | |
{ | |
CHAR *r = s, *end = s + n; | |
while (r < end) | |
*r++ = c; | |
return s; | |
} | |
static void | |
do_one_test (impl_t *impl, CHAR *s, int c __attribute ((unused)), size_t n) | |
{ | |
size_t i, iters = 16; | |
timing_t start, stop, cur; | |
CHAR *tstbuf = malloc (n * sizeof (*s)); | |
assert (tstbuf != NULL); | |
/* Must clear the destination buffer updated by the previous run. */ | |
for (i = 0; i < n; i++) | |
s[i] = 0; | |
CHAR *res = CALL (impl, s, c, n); | |
if (res != s | |
|| SIMPLE_MEMSET (tstbuf, c, n) != tstbuf | |
|| MEMCMP (s, tstbuf, n) != 0) | |
{ | |
error (0, 0, "Wrong result in function %s", impl->name); | |
ret = 1; | |
free (tstbuf); | |
return; | |
} | |
TIMING_NOW (start); | |
for (i = 0; i < iters; ++i) | |
{ | |
CALL (impl, s, c, n); | |
} | |
TIMING_NOW (stop); | |
TIMING_DIFF (cur, start, stop); | |
TIMING_PRINT_MEAN ((double) cur, (double) iters); | |
free (tstbuf); | |
} | |
static void | |
do_test (size_t align, int c, size_t len) | |
{ | |
align &= 63; | |
if ((align + len) * sizeof (CHAR) > page_size) | |
return; | |
printf ("Length %4zd, alignment %2zd, c %2d:", len, align, c); | |
FOR_EACH_IMPL (impl, 0) | |
do_one_test (impl, (CHAR *) (buf1) + align, c, len); | |
putchar ('\n'); | |
} | |
int | |
test_main (void) | |
{ | |
size_t i; | |
int c; | |
test_init (); | |
printf ("%24s", ""); | |
FOR_EACH_IMPL (impl, 0) | |
printf ("\t%s", impl->name); | |
putchar ('\n'); | |
c = 65; | |
for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1) | |
{ | |
do_test (0, c, i); | |
do_test (3, c, i); | |
} | |
return ret; | |
} | |
#include "../test-skeleton.c" |