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/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2006-2007 Red Hat, Inc.
*
* This 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 of the License, or (at your option) any later version.
*
* This 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 this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
* Author: Alexander Larsson <alexl@redhat.com>
*/
#include <config.h>
#include <stdio.h>
#include <unistd.h>
#include <locale.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <glib.h>
#include <gio/gio.h>
#define BENCHMARK_UNIT_NAME "posix-big-file"
#include "benchmark-common.c"
#define FILE_SIZE (1024 * 1024 * 50) /* 50 MiB */
#define BUFFER_SIZE 4096
#define ITERATIONS_NUM 1
static gboolean
is_dir (const gchar *dir)
{
struct stat sbuf;
if (stat (dir, &sbuf) < 0)
return FALSE;
if (S_ISDIR (sbuf.st_mode))
return TRUE;
return FALSE;
}
static gchar *
create_file (const gchar *base_dir)
{
gchar *scratch_file;
gint output_fd;
gint pid;
gchar buffer [BUFFER_SIZE];
gint i;
pid = getpid ();
scratch_file = g_strdup_printf ("%s/posix-benchmark-scratch-%d", base_dir, pid);
output_fd = open (scratch_file, O_WRONLY | O_CREAT | O_TRUNC, 0777);
if (output_fd < 0)
{
g_printerr ("Failed to create scratch file: %s\n", g_strerror (errno));
g_free (scratch_file);
return NULL;
}
memset (buffer, 0xaa, BUFFER_SIZE);
for (i = 0; i < FILE_SIZE; i += BUFFER_SIZE)
{
gint bytes_written;
bytes_written = write (output_fd, buffer, BUFFER_SIZE);
if (bytes_written < BUFFER_SIZE)
{
if (errno == EINTR)
{
i -= BUFFER_SIZE - bytes_written;
continue;
}
g_printerr ("Failed to populate scratch file: %s\n", g_strerror (errno));
close (output_fd);
g_free (scratch_file);
return NULL;
}
}
close (output_fd);
return scratch_file;
}
static void
read_file (const gchar *scratch_file)
{
gint input_fd;
gint i;
input_fd = open (scratch_file, O_RDONLY);
if (input_fd < 0)
{
g_printerr ("Failed to read back scratch file: %s\n", g_strerror (errno));
return;
}
for (i = 0; i < FILE_SIZE; i += BUFFER_SIZE)
{
gchar buffer [BUFFER_SIZE];
gsize bytes_read;
bytes_read = read (input_fd, buffer, BUFFER_SIZE);
if (bytes_read < BUFFER_SIZE)
{
if (errno == EINTR)
{
i -= BUFFER_SIZE - bytes_read;
continue;
}
g_printerr ("Failed to read back scratch file: %s\n", g_strerror (errno));
close (input_fd);
return;
}
}
close (input_fd);
}
static void
delete_file (const gchar *scratch_file)
{
if (unlink (scratch_file) < 0)
{
g_printerr ("Failed to delete scratch file: %s\n", g_strerror (errno));
}
}
static gint
benchmark_run (gint argc, gchar *argv [])
{
gchar *base_dir;
gchar *scratch_file;
gint i;
setlocale (LC_ALL, "");
if (argc < 2)
{
g_printerr ("Usage: %s <scratch path>\n", argv [0]);
return 1;
}
base_dir = argv [1];
if (!is_dir (base_dir))
{
g_printerr ("Scratch path %s is not a directory\n", argv [1]);
return 1;
}
for (i = 0; i < ITERATIONS_NUM; i++)
{
scratch_file = create_file (base_dir);
if (!scratch_file)
{
g_free (base_dir);
return 1;
}
read_file (scratch_file);
delete_file (scratch_file);
g_free (scratch_file);
}
return 0;
}
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