139 lines
3.5 KiB
C
139 lines
3.5 KiB
C
/* Measure memset function throughput with large data sizes.
|
|
Copyright (C) 2017-2018 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
|
|
#define MIN_PAGE_SIZE (getpagesize () + 32 * 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>
|
|
#include "json-lib.h"
|
|
|
|
|
|
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;
|
|
}
|
|
|
|
IMPL (SIMPLE_MEMSET, 1)
|
|
|
|
static void
|
|
do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s, CHAR *s_end,
|
|
int c __attribute ((unused)), size_t n)
|
|
{
|
|
size_t i, iters = MIN_PAGE_SIZE / n;
|
|
timing_t start, stop, cur;
|
|
|
|
TIMING_NOW (start);
|
|
for (i = 0; i < iters && s <= s_end; s_end -= n, i++)
|
|
CALL (impl, s, c, n);
|
|
TIMING_NOW (stop);
|
|
|
|
TIMING_DIFF (cur, start, stop);
|
|
|
|
/* Get time taken per function call. */
|
|
json_element_double (json_ctx, (double) cur / i);
|
|
}
|
|
|
|
static void
|
|
do_test (json_ctx_t *json_ctx, int c, size_t len)
|
|
{
|
|
json_element_object_begin (json_ctx);
|
|
json_attr_uint (json_ctx, "length", len);
|
|
json_attr_uint (json_ctx, "char", c);
|
|
json_array_begin (json_ctx, "timings");
|
|
|
|
FOR_EACH_IMPL (impl, 0)
|
|
{
|
|
do_one_test (json_ctx, impl, (CHAR *) buf1,
|
|
(CHAR *) buf1 + MIN_PAGE_SIZE - len, c, len);
|
|
alloc_bufs ();
|
|
}
|
|
|
|
json_array_end (json_ctx);
|
|
json_element_object_end (json_ctx);
|
|
}
|
|
|
|
int
|
|
test_main (void)
|
|
{
|
|
json_ctx_t json_ctx;
|
|
size_t i;
|
|
|
|
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", "walk");
|
|
|
|
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");
|
|
for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1)
|
|
/* Test length alignments from 0-16 bytes. */
|
|
for (int j = 0; j < i && j < 16; j++)
|
|
do_test (&json_ctx, 65, i + j);
|
|
|
|
for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1)
|
|
for (int j = 0; j < i && j < 16; j++)
|
|
do_test (&json_ctx, 0, i + j);
|
|
|
|
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>
|