135 lines
3.0 KiB
C
135 lines
3.0 KiB
C
/* Measure memset functions with large data sizes.
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Copyright (C) 2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#define TEST_MAIN
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#ifndef WIDE
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# define TEST_NAME "memset"
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#else
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# define TEST_NAME "wmemset"
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#endif /* WIDE */
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#define START_SIZE (128 * 1024)
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#define MIN_PAGE_SIZE (getpagesize () + 64 * 1024 * 1024)
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#define TIMEOUT (20 * 60)
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#include "bench-string.h"
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#ifndef WIDE
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# define MEMSET memset
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# define CHAR char
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# define SIMPLE_MEMSET simple_memset
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# define MEMCMP memcmp
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#else
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# include <wchar.h>
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# define MEMSET wmemset
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# define CHAR wchar_t
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# define SIMPLE_MEMSET simple_wmemset
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# define MEMCMP wmemcmp
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#endif /* WIDE */
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#include <assert.h>
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IMPL (MEMSET, 1)
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typedef CHAR *(*proto_t) (CHAR *, int, size_t);
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CHAR *
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inhibit_loop_to_libcall
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SIMPLE_MEMSET (CHAR *s, int c, size_t n)
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{
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CHAR *r = s, *end = s + n;
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while (r < end)
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*r++ = c;
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return s;
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}
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static void
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do_one_test (impl_t *impl, CHAR *s, int c __attribute ((unused)), size_t n)
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{
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size_t i, iters = 16;
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timing_t start, stop, cur;
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CHAR *tstbuf = malloc (n * sizeof (*s));
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assert (tstbuf != NULL);
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/* Must clear the destination buffer updated by the previous run. */
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for (i = 0; i < n; i++)
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s[i] = 0;
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CHAR *res = CALL (impl, s, c, n);
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if (res != s
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|| SIMPLE_MEMSET (tstbuf, c, n) != tstbuf
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|| MEMCMP (s, tstbuf, n) != 0)
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{
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error (0, 0, "Wrong result in function %s", impl->name);
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ret = 1;
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free (tstbuf);
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return;
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}
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TIMING_NOW (start);
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for (i = 0; i < iters; ++i)
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{
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CALL (impl, s, c, n);
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}
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TIMING_NOW (stop);
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TIMING_DIFF (cur, start, stop);
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TIMING_PRINT_MEAN ((double) cur, (double) iters);
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free (tstbuf);
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}
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static void
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do_test (size_t align, int c, size_t len)
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{
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align &= 63;
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if ((align + len) * sizeof (CHAR) > page_size)
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return;
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printf ("Length %4zd, alignment %2zd, c %2d:", len, align, c);
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FOR_EACH_IMPL (impl, 0)
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do_one_test (impl, (CHAR *) (buf1) + align, c, len);
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putchar ('\n');
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}
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int
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test_main (void)
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{
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size_t i;
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int c;
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test_init ();
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printf ("%24s", "");
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FOR_EACH_IMPL (impl, 0)
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printf ("\t%s", impl->name);
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putchar ('\n');
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c = 65;
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for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1)
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{
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do_test (0, c, i);
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do_test (3, c, i);
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}
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return ret;
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}
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#include <support/test-driver.c>
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