[fio.git] / libfio.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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

#include <string.h>
#include <signal.h>
#include <stdint.h>
#include <locale.h>
#include <fcntl.h>

#include "fio.h"
#include "smalloc.h"
#include "os/os.h"
#include "filelock.h"
#include "helper_thread.h"
#include "filehash.h"

FLIST_HEAD(disk_list);

unsigned long arch_flags = 0;

uintptr_t page_mask = 0;
uintptr_t page_size = 0;

/* see os/os.h */
static const char *fio_os_strings[os_nr] = {
	"Invalid",
	"Linux",
	"AIX",
	"FreeBSD",
	"HP-UX",
	"OSX",
	"NetBSD",
	"OpenBSD",
	"Solaris",
	"Windows",
	"Android",
	"DragonFly",
};

/* see arch/arch.h */
static const char *fio_arch_strings[arch_nr] = {
	"Invalid",
	"x86-64",
	"x86",
	"ppc",
	"ia64",
	"s390",
	"alpha",
	"sparc",
	"sparc64",
	"arm",
	"sh",
	"hppa",
	"mips",
	"aarch64",
	"generic"
};

static void reset_io_counters(struct thread_data *td, int all)
{
	int ddir;

	if (all) {
		for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++) {
			td->stat_io_bytes[ddir] = 0;
			td->this_io_bytes[ddir] = 0;
			td->stat_io_blocks[ddir] = 0;
			td->this_io_blocks[ddir] = 0;
			td->rate_bytes[ddir] = 0;
			td->rate_blocks[ddir] = 0;
			td->bytes_done[ddir] = 0;
			td->rate_io_issue_bytes[ddir] = 0;
			td->rate_next_io_time[ddir] = 0;
		}
	}

	td->zone_bytes = 0;

	td->last_was_sync = false;
	td->rwmix_issues = 0;

	/*
	 * reset file done count if we are to start over
	 */
	if (td->o.time_based || td->o.loops || td->o.do_verify)
		td->nr_done_files = 0;
}

void clear_io_state(struct thread_data *td, int all)
{
	struct fio_file *f;
	unsigned int i;

	reset_io_counters(td, all);

	close_files(td);
	for_each_file(td, f, i) {
		fio_file_clear_done(f);
		f->file_offset = get_start_offset(td, f);
	}

	/*
	 * Re-Seed random number generator if rand_repeatable is true
	 */
	if (td->o.rand_repeatable)
		td_fill_rand_seeds(td);
}

void reset_all_stats(struct thread_data *td)
{
	int i;

	reset_io_counters(td, 1);

	for (i = 0; i < DDIR_RWDIR_CNT; i++) {
		td->io_bytes[i] = 0;
		td->io_blocks[i] = 0;
		td->io_issues[i] = 0;
		td->ts.total_io_u[i] = 0;
		td->ts.runtime[i] = 0;
		td->rwmix_issues = 0;
	}

	set_epoch_time(td, td->o.log_unix_epoch);
	memcpy(&td->start, &td->epoch, sizeof(td->epoch));
	memcpy(&td->iops_sample_time, &td->epoch, sizeof(td->epoch));
	memcpy(&td->bw_sample_time, &td->epoch, sizeof(td->epoch));
	memcpy(&td->ss.prev_time, &td->epoch, sizeof(td->epoch));

	lat_target_reset(td);
	clear_rusage_stat(td);
	helper_reset();
}

void reset_fio_state(void)
{
	groupid = 0;
	thread_number = 0;
	stat_number = 0;
	done_secs = 0;
}

const char *fio_get_os_string(int nr)
{
	if (nr < os_nr)
		return fio_os_strings[nr];

	return NULL;
}

const char *fio_get_arch_string(int nr)
{
	if (nr < arch_nr)
		return fio_arch_strings[nr];

	return NULL;
}

static const char *td_runstates[] = {
	"NOT_CREATED",
	"CREATED",
	"INITIALIZED",
	"RAMP",
	"SETTING_UP",
	"RUNNING",
	"PRE_READING",
	"VERIFYING",
	"FSYNCING",
	"FINISHING",
	"EXITED",
	"REAPED",
};

const char *runstate_to_name(int runstate)
{
	compiletime_assert(TD_LAST == 12, "td runstate list");
	if (runstate >= 0 && runstate < TD_LAST)
		return td_runstates[runstate];

	return "invalid";
}

void td_set_runstate(struct thread_data *td, int runstate)
{
	if (td->runstate == runstate)
		return;

	dprint(FD_PROCESS, "pid=%d: runstate %s -> %s\n", (int) td->pid,
						runstate_to_name(td->runstate),
						runstate_to_name(runstate));
	td->runstate = runstate;
}

int td_bump_runstate(struct thread_data *td, int new_state)
{
	int old_state = td->runstate;

	td_set_runstate(td, new_state);
	return old_state;
}

void td_restore_runstate(struct thread_data *td, int old_state)
{
	td_set_runstate(td, old_state);
}

void fio_mark_td_terminate(struct thread_data *td)
{
	fio_gettime(&td->terminate_time, NULL);
	write_barrier();
	td->terminate = true;
}

void fio_terminate_threads(unsigned int group_id)
{
	struct thread_data *td;
	pid_t pid = getpid();
	int i;

	dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);

	for_each_td(td, i) {
		if (group_id == TERMINATE_ALL || group_id == td->groupid) {
			dprint(FD_PROCESS, "setting terminate on %s/%d\n",
						td->o.name, (int) td->pid);

			if (td->terminate)
				continue;

			fio_mark_td_terminate(td);
			td->o.start_delay = 0;

			/*
			 * if the thread is running, just let it exit
			 */
			if (!td->pid || pid == td->pid)
				continue;
			else if (td->runstate < TD_RAMP)
				kill(td->pid, SIGTERM);
			else {
				struct ioengine_ops *ops = td->io_ops;

				if (ops && ops->terminate)
					ops->terminate(td);
			}
		}
	}
}

int fio_running_or_pending_io_threads(void)
{
	struct thread_data *td;
	int i;
	int nr_io_threads = 0;

	for_each_td(td, i) {
		if (td->io_ops_init && td_ioengine_flagged(td, FIO_NOIO))
			continue;
		nr_io_threads++;
		if (td->runstate < TD_EXITED)
			return 1;
	}

	if (!nr_io_threads)
		return -1; /* we only had cpuio threads to begin with */
	return 0;
}

int fio_set_fd_nonblocking(int fd, const char *who)
{
	int flags;

	flags = fcntl(fd, F_GETFL);
	if (flags < 0)
		log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
	else {
		int new_flags = flags | O_NONBLOCK;

		new_flags = fcntl(fd, F_SETFL, new_flags);
		if (new_flags < 0)
			log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
	}

	return flags;
}

enum {
	ENDIAN_INVALID_BE = 1,
	ENDIAN_INVALID_LE,
	ENDIAN_INVALID_CONFIG,
	ENDIAN_BROKEN,
};

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(CONFIG_LITTLE_ENDIAN)
	if (be)
		return ENDIAN_INVALID_BE;
#elif defined(CONFIG_BIG_ENDIAN)
	if (le)
		return ENDIAN_INVALID_LE;
#else
	return ENDIAN_INVALID_CONFIG;
#endif

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

	return 0;
}

int initialize_fio(char *envp[])
{
	long ps;
	int err;

	/*
	 * We need these to be properly 64-bit aligned, otherwise we
	 * can run into problems on archs that fault on unaligned fp
	 * access (ARM).
	 */
	compiletime_assert((offsetof(struct thread_data, ts) % sizeof(void *)) == 0, "ts");
	compiletime_assert((offsetof(struct thread_stat, percentile_list) % 8) == 0, "stat percentile_list");
	compiletime_assert((offsetof(struct thread_stat, total_run_time) % 8) == 0, "total_run_time");
	compiletime_assert((offsetof(struct thread_stat, total_err_count) % 8) == 0, "total_err_count");
	compiletime_assert((offsetof(struct thread_stat, latency_percentile) % 8) == 0, "stat latency_percentile");
	compiletime_assert((offsetof(struct thread_data, ts.clat_stat) % 8) == 0, "ts.clat_stat");
	compiletime_assert((offsetof(struct thread_options_pack, zipf_theta) % 8) == 0, "zipf_theta");
	compiletime_assert((offsetof(struct thread_options_pack, pareto_h) % 8) == 0, "pareto_h");
	compiletime_assert((offsetof(struct thread_options_pack, percentile_list) % 8) == 0, "percentile_list");
	compiletime_assert((offsetof(struct thread_options_pack, latency_percentile) % 8) == 0, "latency_percentile");
	compiletime_assert((offsetof(struct jobs_eta, m_rate) % 8) == 0, "m_rate");

	compiletime_assert(__TD_F_LAST <= TD_ENG_FLAG_SHIFT, "TD_ENG_FLAG_SHIFT");
	compiletime_assert(BSSPLIT_MAX <= ZONESPLIT_MAX, "bsssplit/zone max");

	err = endian_check();
	if (err) {
		log_err("fio: endianness settings appear wrong.\n");
		switch (err) {
		case ENDIAN_INVALID_BE:
			log_err("fio: got big-endian when configured for little\n");
			break;
		case ENDIAN_INVALID_LE:
			log_err("fio: got little-endian when configured for big\n");
			break;
		case ENDIAN_INVALID_CONFIG:
			log_err("fio: not configured to any endianness\n");
			break;
		case ENDIAN_BROKEN:
			log_err("fio: failed to detect endianness\n");
			break;
		default:
			assert(0);
			break;
		}
		log_err("fio: please report this to fio@vger.kernel.org\n");
		return 1;
	}

#if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME)
#error "No available clock source!"
#endif

	arch_init(envp);

	sinit();

	if (fio_filelock_init()) {
		log_err("fio: failed initializing filelock subsys\n");
		return 1;
	}

	file_hash_init();

	/*
	 * 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();
	return 0;
}

void deinitialize_fio(void)
{
	fio_keywords_exit();
}
Commit	Line	Data
2e1df07d JA	1	/*
	2	* fio - the flexible io tester
	3	*
	4	* Copyright (C) 2005 Jens Axboe <axboe@suse.de>
	5	* Copyright (C) 2006-2012 Jens Axboe <axboe@kernel.dk>
	6	*
	7	* The license below covers all files distributed with fio unless otherwise
	8	* noted in the file itself.
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 as
	12	* published by the Free Software Foundation.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
fa07eaa6	21	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
2e1df07d JA	22	*
	23	*/
	24
	25	#include <string.h>
59dfce57	26	#include <signal.h>
a569b45f JA	27	#include <stdint.h>
a569b45f JA	28	#include <locale.h>
4a851614	29	#include <fcntl.h>
a569b45f	30
2e1df07d	31	#include "fio.h"
a569b45f JA	32	#include "smalloc.h"
a569b45f JA	33	#include "os/os.h"
243bfe19	34	#include "filelock.h"
a39fb9ea	35	#include "helper_thread.h"
d619275c	36	#include "filehash.h"
2e1df07d	37
a3efc919	38	FLIST_HEAD(disk_list);
a3efc919 JA	39
	40	unsigned long arch_flags = 0;
	41
a569b45f JA	42	uintptr_t page_mask = 0;
	43	uintptr_t page_size = 0;
	44
c6da2c34	45	/* see os/os.h */
2e1df07d JA	46	static const char *fio_os_strings[os_nr] = {
	47	"Invalid",
	48	"Linux",
	49	"AIX",
	50	"FreeBSD",
	51	"HP-UX",
	52	"OSX",
	53	"NetBSD",
1c7eaa7b	54	"OpenBSD",
2e1df07d	55	"Solaris",
1c7eaa7b JA	56	"Windows",
1c7eaa7b JA	57	"Android",
239b2882	58	"DragonFly",
2e1df07d JA	59	};
2e1df07d JA	60
c6da2c34	61	/* see arch/arch.h */
2e1df07d JA	62	static const char *fio_arch_strings[arch_nr] = {
	63	"Invalid",
	64	"x86-64",
	65	"x86",
	66	"ppc",
	67	"ia64",
	68	"s390",
	69	"alpha",
	70	"sparc",
	71	"sparc64",
	72	"arm",
	73	"sh",
	74	"hppa",
c6da2c34 TK	75	"mips",
c6da2c34 TK	76	"aarch64",
2e1df07d JA	77	"generic"
	78	};
	79
ac28d905	80	static void reset_io_counters(struct thread_data *td, int all)
2e1df07d	81	{
6eaf09d6	82	int ddir;
bcd5abfa	83
ac28d905 JA	84	if (all) {
	85	for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++) {
	86	td->stat_io_bytes[ddir] = 0;
	87	td->this_io_bytes[ddir] = 0;
	88	td->stat_io_blocks[ddir] = 0;
	89	td->this_io_blocks[ddir] = 0;
	90	td->rate_bytes[ddir] = 0;
	91	td->rate_blocks[ddir] = 0;
	92	td->bytes_done[ddir] = 0;
	93	td->rate_io_issue_bytes[ddir] = 0;
	94	td->rate_next_io_time[ddir] = 0;
	95	}
6eaf09d6	96	}
ac28d905	97
2e1df07d	98	td->zone_bytes = 0;
2e1df07d	99
2ea93f98	100	td->last_was_sync = false;
bcd5abfa	101	td->rwmix_issues = 0;
2e1df07d JA	102
	103	/*
	104	* reset file done count if we are to start over
	105	*/
44cbc6da	106	if (td->o.time_based \|\| td->o.loops \|\| td->o.do_verify)
2e1df07d JA	107	td->nr_done_files = 0;
	108	}
	109
ac28d905	110	void clear_io_state(struct thread_data *td, int all)
2e1df07d JA	111	{
	112	struct fio_file *f;
	113	unsigned int i;
	114
ac28d905	115	reset_io_counters(td, all);
2e1df07d JA	116
2e1df07d JA	117	close_files(td);
ec803e97	118	for_each_file(td, f, i) {
2e1df07d	119	fio_file_clear_done(f);
ec803e97 BF	120	f->file_offset = get_start_offset(td, f);
ec803e97 BF	121	}
2e1df07d JA	122
2e1df07d JA	123	/*
1520f26e	124	* Re-Seed random number generator if rand_repeatable is true
2e1df07d	125	*/
1520f26e D	126	if (td->o.rand_repeatable)
1520f26e D	127	td_fill_rand_seeds(td);
2e1df07d JA	128	}
	129
	130	void reset_all_stats(struct thread_data *td)
	131	{
2e1df07d JA	132	int i;
2e1df07d JA	133
ac28d905	134	reset_io_counters(td, 1);
2e1df07d	135
6eaf09d6	136	for (i = 0; i < DDIR_RWDIR_CNT; i++) {
2e1df07d JA	137	td->io_bytes[i] = 0;
	138	td->io_blocks[i] = 0;
	139	td->io_issues[i] = 0;
	140	td->ts.total_io_u[i] = 0;
6eaf09d6	141	td->ts.runtime[i] = 0;
5b3faae6	142	td->rwmix_issues = 0;
2e1df07d JA	143	}
2e1df07d JA	144
3aea75b1	145	set_epoch_time(td, td->o.log_unix_epoch);
8b6a404c VF	146	memcpy(&td->start, &td->epoch, sizeof(td->epoch));
	147	memcpy(&td->iops_sample_time, &td->epoch, sizeof(td->epoch));
	148	memcpy(&td->bw_sample_time, &td->epoch, sizeof(td->epoch));
	149	memcpy(&td->ss.prev_time, &td->epoch, sizeof(td->epoch));
3e260a46	150
6bb58215	151	lat_target_reset(td);
210dd0fc	152	clear_rusage_stat(td);
a47591e4	153	helper_reset();
2e1df07d JA	154	}
	155
	156	void reset_fio_state(void)
	157	{
	158	groupid = 0;
	159	thread_number = 0;
2caefeec	160	stat_number = 0;
2e1df07d JA	161	done_secs = 0;
	162	}
	163
	164	const char *fio_get_os_string(int nr)
	165	{
	166	if (nr < os_nr)
	167	return fio_os_strings[nr];
	168
	169	return NULL;
	170	}
	171
	172	const char *fio_get_arch_string(int nr)
	173	{
	174	if (nr < arch_nr)
	175	return fio_arch_strings[nr];
	176
	177	return NULL;
	178	}
	179
6e760cf3 JA	180	static const char *td_runstates[] = {
	181	"NOT_CREATED",
	182	"CREATED",
	183	"INITIALIZED",
	184	"RAMP",
	185	"SETTING_UP",
	186	"RUNNING",
	187	"PRE_READING",
	188	"VERIFYING",
	189	"FSYNCING",
	190	"FINISHING",
	191	"EXITED",
	192	"REAPED",
	193	};
	194
9cc8cb91	195	const char *runstate_to_name(int runstate)
6e760cf3 JA	196	{
	197	compiletime_assert(TD_LAST == 12, "td runstate list");
	198	if (runstate >= 0 && runstate < TD_LAST)
	199	return td_runstates[runstate];
	200
	201	return "invalid";
	202	}
	203
2e1df07d JA	204	void td_set_runstate(struct thread_data *td, int runstate)
	205	{
	206	if (td->runstate == runstate)
	207	return;
	208
6e760cf3 JA	209	dprint(FD_PROCESS, "pid=%d: runstate %s -> %s\n", (int) td->pid,
	210	runstate_to_name(td->runstate),
	211	runstate_to_name(runstate));
2e1df07d JA	212	td->runstate = runstate;
	213	}
	214
8edd973d JA	215	int td_bump_runstate(struct thread_data *td, int new_state)
	216	{
	217	int old_state = td->runstate;
	218
	219	td_set_runstate(td, new_state);
	220	return old_state;
	221	}
	222
	223	void td_restore_runstate(struct thread_data *td, int old_state)
	224	{
	225	td_set_runstate(td, old_state);
	226	}
	227
ebea2133 JA	228	void fio_mark_td_terminate(struct thread_data *td)
	229	{
	230	fio_gettime(&td->terminate_time, NULL);
	231	write_barrier();
2ea93f98	232	td->terminate = true;
ebea2133 JA	233	}
ebea2133 JA	234
d883efbd	235	void fio_terminate_threads(unsigned int group_id)
2e1df07d JA	236	{
2e1df07d JA	237	struct thread_data *td;
41fa20ec	238	pid_t pid = getpid();
2e1df07d JA	239	int i;
	240
	241	dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
	242
	243	for_each_td(td, i) {
d883efbd	244	if (group_id == TERMINATE_ALL \|\| group_id == td->groupid) {
2e1df07d JA	245	dprint(FD_PROCESS, "setting terminate on %s/%d\n",
2e1df07d JA	246	td->o.name, (int) td->pid);
cba5460c JA	247
	248	if (td->terminate)
	249	continue;
	250
ebea2133	251	fio_mark_td_terminate(td);
2e1df07d JA	252	td->o.start_delay = 0;
	253
	254	/*
	255	* if the thread is running, just let it exit
	256	*/
36d80bc7	257	if (!td->pid \|\| pid == td->pid)
2e1df07d JA	258	continue;
	259	else if (td->runstate < TD_RAMP)
	260	kill(td->pid, SIGTERM);
36d80bc7	261	else {
2e1df07d JA	262	struct ioengine_ops *ops = td->io_ops;
2e1df07d JA	263
36d80bc7 JA	264	if (ops && ops->terminate)
36d80bc7 JA	265	ops->terminate(td);
2e1df07d JA	266	}
	267	}
	268	}
	269	}
	270
046395d7 JA	271	int fio_running_or_pending_io_threads(void)
	272	{
	273	struct thread_data *td;
	274	int i;
a691d82f	275	int nr_io_threads = 0;
046395d7 JA	276
046395d7 JA	277	for_each_td(td, i) {
356ef1a1	278	if (td->io_ops_init && td_ioengine_flagged(td, FIO_NOIO))
046395d7	279	continue;
a691d82f	280	nr_io_threads++;
046395d7 JA	281	if (td->runstate < TD_EXITED)
	282	return 1;
	283	}
	284
a691d82f TK	285	if (!nr_io_threads)
a691d82f TK	286	return -1; /* we only had cpuio threads to begin with */
046395d7 JA	287	return 0;
	288	}
	289
3a35845f	290	int fio_set_fd_nonblocking(int fd, const char *who)
4a851614 JA	291	{
	292	int flags;
	293
	294	flags = fcntl(fd, F_GETFL);
	295	if (flags < 0)
	296	log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
	297	else {
3a35845f JA	298	int new_flags = flags \| O_NONBLOCK;
	299
	300	new_flags = fcntl(fd, F_SETFL, new_flags);
	301	if (new_flags < 0)
4a851614 JA	302	log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
4a851614 JA	303	}
3a35845f JA	304
3a35845f JA	305	return flags;
4a851614 JA	306	}
4a851614 JA	307
1a50e7f0 TK	308	enum {
	309	ENDIAN_INVALID_BE = 1,
	310	ENDIAN_INVALID_LE,
	311	ENDIAN_INVALID_CONFIG,
	312	ENDIAN_BROKEN,
	313	};
	314
a569b45f JA	315	static int endian_check(void)
	316	{
	317	union {
	318	uint8_t c[8];
	319	uint64_t v;
	320	} u;
	321	int le = 0, be = 0;
	322
	323	u.v = 0x12;
	324	if (u.c[7] == 0x12)
	325	be = 1;
	326	else if (u.c[0] == 0x12)
	327	le = 1;
	328
	329	#if defined(CONFIG_LITTLE_ENDIAN)
	330	if (be)
1a50e7f0	331	return ENDIAN_INVALID_BE;
a569b45f JA	332	#elif defined(CONFIG_BIG_ENDIAN)
a569b45f JA	333	if (le)
1a50e7f0	334	return ENDIAN_INVALID_LE;
a569b45f	335	#else
1a50e7f0	336	return ENDIAN_INVALID_CONFIG;
a569b45f JA	337	#endif
	338
	339	if (!le && !be)
1a50e7f0	340	return ENDIAN_BROKEN;
a569b45f JA	341
	342	return 0;
	343	}
	344
	345	int initialize_fio(char *envp[])
	346	{
	347	long ps;
1a50e7f0	348	int err;
a569b45f	349
976a7756 JA	350	/*
	351	* We need these to be properly 64-bit aligned, otherwise we
	352	* can run into problems on archs that fault on unaligned fp
	353	* access (ARM).
	354	*/
dbf285f7	355	compiletime_assert((offsetof(struct thread_data, ts) % sizeof(void *)) == 0, "ts");
24ffb6f8	356	compiletime_assert((offsetof(struct thread_stat, percentile_list) % 8) == 0, "stat percentile_list");
3d0ebb30 GG	357	compiletime_assert((offsetof(struct thread_stat, total_run_time) % 8) == 0, "total_run_time");
3d0ebb30 GG	358	compiletime_assert((offsetof(struct thread_stat, total_err_count) % 8) == 0, "total_err_count");
24ffb6f8	359	compiletime_assert((offsetof(struct thread_stat, latency_percentile) % 8) == 0, "stat latency_percentile");
dbf285f7	360	compiletime_assert((offsetof(struct thread_data, ts.clat_stat) % 8) == 0, "ts.clat_stat");
24ffb6f8 JA	361	compiletime_assert((offsetof(struct thread_options_pack, zipf_theta) % 8) == 0, "zipf_theta");
	362	compiletime_assert((offsetof(struct thread_options_pack, pareto_h) % 8) == 0, "pareto_h");
	363	compiletime_assert((offsetof(struct thread_options_pack, percentile_list) % 8) == 0, "percentile_list");
b8c6b4de	364	compiletime_assert((offsetof(struct thread_options_pack, latency_percentile) % 8) == 0, "latency_percentile");
dbf285f7	365	compiletime_assert((offsetof(struct jobs_eta, m_rate) % 8) == 0, "m_rate");
976a7756	366
9c6f1e75	367	compiletime_assert(__TD_F_LAST <= TD_ENG_FLAG_SHIFT, "TD_ENG_FLAG_SHIFT");
3154f1ed	368	compiletime_assert(BSSPLIT_MAX <= ZONESPLIT_MAX, "bsssplit/zone max");
9c6f1e75	369
1a50e7f0 TK	370	err = endian_check();
1a50e7f0 TK	371	if (err) {
a569b45f	372	log_err("fio: endianness settings appear wrong.\n");
1a50e7f0 TK	373	switch (err) {
	374	case ENDIAN_INVALID_BE:
	375	log_err("fio: got big-endian when configured for little\n");
	376	break;
	377	case ENDIAN_INVALID_LE:
	378	log_err("fio: got little-endian when configured for big\n");
	379	break;
	380	case ENDIAN_INVALID_CONFIG:
	381	log_err("fio: not configured to any endianness\n");
	382	break;
	383	case ENDIAN_BROKEN:
	384	log_err("fio: failed to detect endianness\n");
	385	break;
	386	default:
	387	assert(0);
	388	break;
	389	}
a569b45f JA	390	log_err("fio: please report this to fio@vger.kernel.org\n");
	391	return 1;
	392	}
	393
	394	#if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME)
	395	#error "No available clock source!"
	396	#endif
	397
	398	arch_init(envp);
	399
	400	sinit();
	401
243bfe19 JA	402	if (fio_filelock_init()) {
	403	log_err("fio: failed initializing filelock subsys\n");
	404	return 1;
	405	}
	406
d619275c JA	407	file_hash_init();
d619275c JA	408
a569b45f JA	409	/*
	410	* We need locale for number printing, if it isn't set then just
	411	* go with the US format.
	412	*/
	413	if (!getenv("LC_NUMERIC"))
	414	setlocale(LC_NUMERIC, "en_US");
	415
	416	ps = sysconf(_SC_PAGESIZE);
	417	if (ps < 0) {
	418	log_err("Failed to get page size\n");
	419	return 1;
	420	}
	421
	422	page_size = ps;
	423	page_mask = ps - 1;
2e1df07d	424
a569b45f JA	425	fio_keywords_init();
	426	return 0;
	427	}
af1dc266 JA	428
	429	void deinitialize_fio(void)
	430	{
	431	fio_keywords_exit();
	432	}