fio.c

/*
 * fio - the flexible io tester
 *
 * Copyright (C) 2005 Jens Axboe <axboe@suse.de>
 * Copyright (C) 2006-2012 Jens Axboe <axboe@kernel.dk>
 *
 * The license below covers all files distributed with fio unless otherwise
 * noted in the file itself.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <limits.h>
#include <signal.h>
#include <time.h>
#include <locale.h>
#include <assert.h>
#include <time.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/mman.h>

#include "fio.h"
#include "hash.h"
#include "smalloc.h"
#include "verify.h"
#include "trim.h"
#include "diskutil.h"
#include "cgroup.h"
#include "profile.h"
#include "lib/rand.h"
#include "memalign.h"
#include "server.h"

unsigned long page_mask;
unsigned long page_size;

int groupid = 0;
unsigned int thread_number = 0;
unsigned int nr_process = 0;
unsigned int nr_thread = 0;
int shm_id = 0;
int temp_stall_ts;
unsigned long done_secs = 0;

/*
 * Just expose an empty list, if the OS does not support disk util stats
 */
#ifndef FIO_HAVE_DISK_UTIL
FLIST_HEAD(disk_list);
#endif

unsigned long arch_flags = 0;

static int endian_check(void)
{
	union {
		uint8_t c[8];
		uint64_t v;
	} u;
	int le = 0, be = 0;

	u.v = 0x12;
	if (u.c[7] == 0x12)
		be = 1;
	else if (u.c[0] == 0x12)
		le = 1;

#if defined(FIO_LITTLE_ENDIAN)
	if (be)
		return 1;
#elif defined(FIO_BIG_ENDIAN)
	if (le)
		return 1;
#else
	return 1;
#endif

	if (!le && !be)
		return 1;

	return 0;
}

int main(int argc, char *argv[], char *envp[])
{
	long ps;

	if (endian_check()) {
		log_err("fio: endianness settings appear wrong.\n");
		log_err("fio: please report this to fio@vger.kernel.org\n");
		return 1;
	}

	arch_init(envp);

	sinit();

	/*
	 * We need locale for number printing, if it isn't set then just
	 * go with the US format.
	 */
	if (!getenv("LC_NUMERIC"))
		setlocale(LC_NUMERIC, "en_US");

	ps = sysconf(_SC_PAGESIZE);
	if (ps < 0) {
		log_err("Failed to get page size\n");
		return 1;
	}

	page_size = ps;
	page_mask = ps - 1;

	fio_keywords_init();

	if (parse_options(argc, argv))
		return 1;

	if (nr_clients)
		return fio_handle_clients();
	else
		return fio_backend();
}