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glibc/benchtests/bench-memmove-large.c
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/* Measure memmove 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 BASE_PAGE_SIZE (1024 * 1024) | |
#define START_SIZE (4 * 1024) | |
#define MIN_PAGE_SIZE (getpagesize () + 16 * 1024 * 1024) | |
#define TEST_MAIN | |
#define TEST_NAME "memmove" | |
#define TIMEOUT (20 * 60) | |
#include "bench-string.h" | |
IMPL (memmove, 1) | |
typedef char *(*proto_t) (char *, const char *, size_t); | |
static void | |
do_one_test (impl_t *impl, char *dst, char *src, const char *orig_src, | |
size_t len) | |
{ | |
size_t i, iters = 16; | |
timing_t start, stop, cur; | |
/* This also clears the destination buffer updated by the previous | |
run. */ | |
memcpy (src, orig_src, len); | |
char *res = CALL (impl, dst, src, len); | |
if (res != dst) | |
{ | |
error (0, 0, "Wrong result in function %s %p %p", impl->name, | |
res, dst); | |
ret = 1; | |
return; | |
} | |
if (memcmp (dst, orig_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 &= 127; | |
if (align1 + len >= page_size) | |
return; | |
align2 &= 127; | |
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, (char *) (buf2 + align1), 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, 64, i + 7); | |
do_test (0, 3, i + 15); | |
do_test (3, 0, i + 31); | |
do_test (3, 7, i + 63); | |
do_test (9, 5, i + 127); | |
} | |
return ret; | |
} | |
#include "../test-skeleton.c" |