glibc/benchtests/bench-strcoll.c

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2015-05-13 01:22:14 +08:00
/* Measure strcoll execution time in different locales.
Copyright (C) 2015-2016 Free Software Foundation, Inc.
2015-05-13 01:22:14 +08:00
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/>. */
#include <stdio.h>
#include <fcntl.h>
#include <assert.h>
#include <stdlib.h>
#include <locale.h>
#include <unistd.h>
#include "json-lib.h"
#include "bench-timing.h"
#include <string.h>
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/* Many thanks to http://generator.lorem-ipsum.info/ */
#define INPUT_PREFIX "strcoll-inputs/"
static const char *const input_files[] = {
"filelist#C",
"filelist#en_US.UTF-8",
"lorem_ipsum#vi_VN.UTF-8",
"lorem_ipsum#ar_SA.UTF-8",
"lorem_ipsum#en_US.UTF-8",
"lorem_ipsum#zh_CN.UTF-8",
"lorem_ipsum#cs_CZ.UTF-8",
"lorem_ipsum#en_GB.UTF-8",
"lorem_ipsum#da_DK.UTF-8",
"lorem_ipsum#pl_PL.UTF-8",
"lorem_ipsum#fr_FR.UTF-8",
"lorem_ipsum#pt_PT.UTF-8",
"lorem_ipsum#el_GR.UTF-8",
"lorem_ipsum#ru_RU.UTF-8",
"lorem_ipsum#he_IL.UTF-8",
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"lorem_ipsum#es_ES.UTF-8",
"lorem_ipsum#hi_IN.UTF-8",
"lorem_ipsum#sv_SE.UTF-8",
"lorem_ipsum#hu_HU.UTF-8",
"lorem_ipsum#tr_TR.UTF-8",
"lorem_ipsum#is_IS.UTF-8",
"lorem_ipsum#it_IT.UTF-8",
"lorem_ipsum#sr_RS.UTF-8",
"lorem_ipsum#ja_JP.UTF-8"
};
#define TEXTFILE_DELIMITER " \n\r\t.,?!"
static char *
read_file (const char *filename)
{
struct stat stats;
char *buffer = NULL;
int fd = open (filename, O_CLOEXEC);
if (fd >= 0)
{
if (fstat (fd, &stats) == 0)
{
buffer = malloc (stats.st_size + 1);
if (buffer)
{
if (read (fd, buffer, stats.st_size) == stats.st_size)
buffer[stats.st_size] = '\0';
else
{
free (buffer);
buffer = NULL;
}
}
}
close (fd);
}
return buffer;
}
static size_t
count_words (const char *text, const char *delim)
{
size_t wordcount = 0;
char *tmp = strdup (text);
char *token = strtok (tmp, delim);
while (token != NULL)
{
if (*token != '\0')
wordcount++;
token = strtok (NULL, delim);
}
free (tmp);
return wordcount;
}
typedef struct
{
size_t size;
char **words;
} word_list;
static word_list *
new_word_list (size_t size)
{
word_list *list = malloc (sizeof (word_list));
assert (list != NULL);
list->size = size;
list->words = malloc (size * sizeof (char *));
assert (list->words != NULL);
return list;
}
static word_list *
str_word_list (const char *str, const char *delim)
{
size_t n = 0;
word_list *list = new_word_list (count_words (str, delim));
char *toks = strdup (str);
char *word = strtok (toks, delim);
while (word != NULL && n < list->size)
{
if (*word != '\0')
list->words[n++] = strdup (word);
word = strtok (NULL, delim);
}
free (toks);
return list;
}
static word_list *
copy_word_list (const word_list *list)
{
size_t i;
word_list *copy = new_word_list (list->size);
for (i = 0; i < list->size; i++)
copy->words[i] = strdup (list->words[i]);
return copy;
}
static void
free_word_list (word_list *list)
{
size_t i;
for (i = 0; i < list->size; i++)
free (list->words[i]);
free (list->words);
free (list);
}
static int
compare_words (const void *a, const void *b)
{
const char *s1 = *(char **) a;
const char *s2 = *(char **) b;
return strcoll (s1, s2);
}
#undef INNER_LOOP_ITERS
#define INNER_LOOP_ITERS 16
static void
bench_list (json_ctx_t *json_ctx, word_list *list)
{
size_t i;
timing_t start, stop, cur;
word_list **tests = malloc (INNER_LOOP_ITERS * sizeof (word_list *));
assert (tests != NULL);
for (i = 0; i < INNER_LOOP_ITERS; i++)
tests[i] = copy_word_list (list);
TIMING_NOW (start);
for (i = 0; i < INNER_LOOP_ITERS; i++)
qsort (tests[i]->words, tests[i]->size, sizeof (char *), compare_words);
TIMING_NOW (stop);
TIMING_DIFF (cur, start, stop);
setlocale (LC_ALL, "en_US.UTF-8");
json_attr_double (json_ctx, "duration", cur);
json_attr_double (json_ctx, "iterations", i);
json_attr_double (json_ctx, "mean", (double) cur / i);
for (i = 0; i < INNER_LOOP_ITERS; i++)
free_word_list (tests[i]);
free (tests);
}
typedef enum
{
OK,
ERROR_FILENAME,
ERROR_LOCALE,
ERROR_IO
} result_t;
static result_t
bench_file (json_ctx_t *json_ctx, const char *testname, const char *filename,
const char *locale)
{
if (setlocale (LC_ALL, locale) == NULL)
return ERROR_LOCALE;
char *text = read_file (filename);
if (text == NULL)
return ERROR_IO;
word_list *list = str_word_list (text, TEXTFILE_DELIMITER);
json_attr_object_begin (json_ctx, testname);
bench_list (json_ctx, list);
json_attr_object_end (json_ctx);
free_word_list (list);
free (text);
return OK;
}
int
main (void)
{
json_ctx_t *json_ctx = malloc (sizeof (json_ctx_t));
assert (json_ctx != NULL);
json_init (json_ctx, 2, stdout);
json_attr_object_begin (json_ctx, "strcoll");
size_t i;
result_t result = OK;
for (i = 0; i < (sizeof (input_files) / sizeof (input_files[0])); i++)
{
char *locale = strchr (input_files[i], '#');
if (locale == NULL)
{
printf ("Failed to get locale from filename %s, aborting!\n",
input_files[i]);
return ERROR_FILENAME;
}
char *filename;
asprintf (&filename, INPUT_PREFIX "%s", input_files[i]);
result = bench_file (json_ctx, input_files[i], filename, locale + 1);
if (result != OK)
{
if (result == ERROR_LOCALE)
printf ("Failed to set locale %s, aborting!\n", locale);
else if (result == ERROR_IO)
printf ("Failed to read file %s, aborting!\n", filename);
free (filename);
goto out;
}
free (filename);
}
out:
json_attr_object_end (json_ctx);
free (json_ctx);
return result;
}