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/* Measure strlen functions.
Copyright (C) 2013-2024 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
<https://www.gnu.org/licenses/>. */
#define TEST_MAIN
#ifndef WIDE
# define TEST_NAME "strnlen"
#else
# define TEST_NAME "wcsnlen"
# define generic_strnlen generic_wcsnlen
#endif /* WIDE */
#include "bench-string.h"
#include "json-lib.h"
#define BIG_CHAR MAX_CHAR
#ifndef WIDE
# define MIDDLE_CHAR 127
#else
# define MIDDLE_CHAR 1121
#endif /* WIDE */
typedef size_t (*proto_t) (const CHAR *, size_t);
size_t generic_strnlen (const CHAR *, size_t);
IMPL (STRNLEN, 1)
IMPL (generic_strnlen, 0)
static void
do_one_test (json_ctx_t *json_ctx, impl_t *impl, const CHAR *s, size_t maxlen,
size_t exp_len)
{
size_t len = CALL (impl, s, maxlen), i, iters = INNER_LOOP_ITERS;
timing_t start, stop, cur;
if (len != exp_len)
{
error (0, 0, "Wrong result in function %s %zd %zd", impl->name, len,
exp_len);
ret = 1;
return;
}
/* Warmup. */
for (i = 0; i < iters / 16; ++i)
{
CALL (impl, s, maxlen);
}
TIMING_NOW (start);
for (i = 0; i < iters; ++i)
{
CALL (impl, s, maxlen);
}
TIMING_NOW (stop);
TIMING_DIFF (cur, start, stop);
json_element_double (json_ctx, (double) cur / (double) iters);
}
static void
do_test (json_ctx_t *json_ctx, size_t align, size_t len, size_t maxlen,
int max_char)
{
size_t i;
align &= getpagesize () - 1;
if ((align + len) * sizeof (CHAR) >= page_size)
return;
CHAR *buf = (CHAR *) (buf1);
json_element_object_begin (json_ctx);
json_attr_uint (json_ctx, "len", len);
json_attr_uint (json_ctx, "maxlen", maxlen);
json_attr_uint (json_ctx, "max_char", max_char);
json_attr_uint (json_ctx, "align", align);
json_array_begin (json_ctx, "timings");
for (i = 0; i < len; ++i)
buf[align + i] = 1 + 7 * i % max_char;
buf[align + len] = 0;
FOR_EACH_IMPL (impl, 0)
do_one_test (json_ctx, impl, (CHAR *) (buf + align), maxlen,
MIN (len, maxlen));
json_array_end (json_ctx);
json_element_object_end (json_ctx);
}
int
test_main (void)
{
size_t i, j;
json_ctx_t json_ctx;
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", "");
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 = 0; i <= 1; ++i)
{
do_test (&json_ctx, i, 1, 128, MIDDLE_CHAR);
do_test (&json_ctx, i, 128, 1, MIDDLE_CHAR);
do_test (&json_ctx, i, 1, 2, MIDDLE_CHAR);
do_test (&json_ctx, i, 2, 1, MIDDLE_CHAR);
do_test (&json_ctx, 32 + i, 1, 128, MIDDLE_CHAR);
do_test (&json_ctx, 32 + i, 128, 1, MIDDLE_CHAR);
do_test (&json_ctx, 32 + i, 1, 2, MIDDLE_CHAR);
do_test (&json_ctx, 32 + i, 2, 1, MIDDLE_CHAR);
}
for (i = 1; i < 8; ++i)
{
do_test (&json_ctx, 0, i, i - 1, MIDDLE_CHAR);
do_test (&json_ctx, 0, i, i, MIDDLE_CHAR);
do_test (&json_ctx, 0, i, i + 1, MIDDLE_CHAR);
}
for (i = 1; i < 8; ++i)
{
do_test (&json_ctx, i, i, i - 1, MIDDLE_CHAR);
do_test (&json_ctx, i, i, i, MIDDLE_CHAR);
do_test (&json_ctx, i, i, i + 1, MIDDLE_CHAR);
}
for (i = 2; i <= 10; ++i)
{
do_test (&json_ctx, 0, 1 << i, 5000, MIDDLE_CHAR);
do_test (&json_ctx, 1, 1 << i, 5000, MIDDLE_CHAR);
do_test (&json_ctx, 0, 5000, 1 << i, MIDDLE_CHAR);
do_test (&json_ctx, 1, 5000, 1 << i, MIDDLE_CHAR);
}
for (i = 1; i < 8; ++i)
{
do_test (&json_ctx, 0, i, 5000, BIG_CHAR);
do_test (&json_ctx, 0, 5000, i, BIG_CHAR);
}
for (i = 1; i < 8; ++i)
{
do_test (&json_ctx, i, i, 5000, BIG_CHAR);
do_test (&json_ctx, i, 5000, i, BIG_CHAR);
}
for (i = 2; i <= 10; ++i)
{
do_test (&json_ctx, 0, 1 << i, 5000, BIG_CHAR);
do_test (&json_ctx, 1, 1 << i, 5000, BIG_CHAR);
do_test (&json_ctx, 0, 5000, 1 << i, BIG_CHAR);
do_test (&json_ctx, 1, 5000, 1 << i, BIG_CHAR);
}
for (i = (16 / sizeof (CHAR)); i <= (8192 / sizeof (CHAR)); i += i)
{
for (j = 0; j <= (704 / sizeof (CHAR)); j += (32 / sizeof (CHAR)))
{
do_test (&json_ctx, 0, i + j, i, BIG_CHAR);
do_test (&json_ctx, 64, i + j, i, BIG_CHAR);
do_test (&json_ctx, 0, i, i + j, BIG_CHAR);
do_test (&json_ctx, 64, i, i + j, BIG_CHAR);
if (j < i)
{
do_test (&json_ctx, 0, i - j, i, BIG_CHAR);
do_test (&json_ctx, 64, i - j, i, BIG_CHAR);
do_test (&json_ctx, 0, i, i - j, BIG_CHAR);
do_test (&json_ctx, 64, i, i - j, BIG_CHAR);
}
}
}
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>
#define libc_hidden_def(X)
#ifndef WIDE
# undef STRNLEN
# define STRNLEN generic_strnlen
# include <string/strnlen.c>
#else
# define WCSNLEN generic_strnlen
# include <wcsmbs/wcsnlen.c>
#endif
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