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/* Measure hash functions runtime.
Copyright (C) 2022 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 TEST_FUNC
# error "No TEST_FUNC provided!"
#endif
#ifndef SIMPLE_TEST_FUNC
# error "No SIMPLE_TEST_FUNC provided!"
#endif
#ifndef TEST_NAME
# define STRINGIFY_PRIMITIVE(x) # x
# define STRINGIFY(x) STRINGIFY_PRIMITIVE (x)
# define TEST_NAME STRINGIFY (TEST_FUNC)
#endif
#include "json-lib.h"
#include "bench-timing.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
enum
{
NFIXED_ITERS = 1048576,
NRAND_BUFS = 16384,
NRAND_ITERS = 2048,
RAND_BENCH_MAX_LEN = 128
};
#include "bench-hash-funcs-kernel.h"
#define SIMPLE
#include "bench-hash-funcs-kernel.h"
static void
do_one_test (json_ctx_t *json_ctx, size_t len)
{
char buf[len + 1];
memset (buf, -1, len);
buf[len] = '\0';
json_element_object_begin (json_ctx);
json_attr_string (json_ctx, "type", "fixed");
json_attr_uint (json_ctx, "length", len);
json_attr_double (json_ctx, "time_simple", do_one_test_kernel_simple (buf, len));
json_attr_double (json_ctx, "time_optimized", do_one_test_kernel_optimized (buf, len));
json_element_object_end (json_ctx);
}
static void __attribute__ ((noinline, noclone))
do_rand_test (json_ctx_t *json_ctx)
{
size_t i, sz, offset;
char *bufs;
unsigned int *sizes;
bufs = (char *) calloc (NRAND_BUFS, RAND_BENCH_MAX_LEN);
sizes = (unsigned int *) calloc (NRAND_BUFS, sizeof (unsigned int));
if (bufs == NULL || sizes == NULL)
{
fprintf (stderr, "Failed to allocate bufs for random test\n");
goto done;
}
for (sz = 2; sz <= RAND_BENCH_MAX_LEN; sz += sz)
{
json_element_object_begin (json_ctx);
json_attr_string (json_ctx, "type", "random");
json_attr_uint (json_ctx, "length", sz);
for (i = 0, offset = 0; i < NRAND_BUFS;
++i, offset += RAND_BENCH_MAX_LEN)
{
sizes[i] = random () % sz;
memset (bufs + offset, -1, sizes[i]);
bufs[offset + sizes[i]] = '\0';
}
json_attr_double (json_ctx, "time_simple",
do_rand_test_kernel_simple (bufs, sizes));
json_attr_double (json_ctx, "time_optimized",
do_rand_test_kernel_optimized (bufs, sizes));
json_element_object_end (json_ctx);
}
done:
if (bufs)
free (bufs);
if (sizes)
free (sizes);
}
static int
do_test (void)
{
int i;
json_ctx_t json_ctx;
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_array_begin (&json_ctx, "results");
for (i = 0; i < 16; ++i)
do_one_test (&json_ctx, i);
for (i = 16; i <= 256; i += i)
do_one_test (&json_ctx, i);
do_rand_test (&json_ctx);
json_array_end (&json_ctx);
json_attr_object_end (&json_ctx);
json_attr_object_end (&json_ctx);
json_document_end (&json_ctx);
return 0;
}
#include <support/test-driver.c>
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