[fio.git] / steadystate.c

#include <stdlib.h>

#include "fio.h"
#include "steadystate.h"
#include "helper_thread.h"

bool steadystate_enabled = false;

static void steadystate_alloc(struct thread_data *td)
{
	int i;

	td->ss.bw_data = malloc(td->ss.dur * sizeof(uint64_t));
	td->ss.iops_data = malloc(td->ss.dur * sizeof(uint64_t));
	/* initialize so that it is obvious if the cache is not full in the output */
	for (i = 0; i < td->ss.dur; i++)
		td->ss.iops_data[i] = td->ss.bw_data[i] = 0;

	td->ss.state |= __FIO_SS_DATA;
}

void steadystate_setup(void)
{
	int i, prev_groupid;
	struct thread_data *td, *prev_td;

	if (!steadystate_enabled)
		return;

	/*
	 * if group reporting is enabled, identify the last td
	 * for each group and use it for storing steady state
	 * data
	 */
	prev_groupid = -1;
	prev_td = NULL;
	for_each_td(td, i) {
		if (!td->ss.dur)
			continue;

		if (!td->o.group_reporting) {
			steadystate_alloc(td);
			continue;
		}

		if (prev_groupid != td->groupid) {
			if (prev_td != NULL) {
				steadystate_alloc(prev_td);
			}
			prev_groupid = td->groupid;
		}
		prev_td = td;
	}

	if (prev_td != NULL && prev_td->o.group_reporting) {
		steadystate_alloc(prev_td);
	}
}

static bool steadystate_slope(uint64_t iops, uint64_t bw,
			      struct thread_data *td)
{
	int i, j;
	double result;
	struct steadystate_data *ss = &td->ss;
	uint64_t new_val;

	ss->bw_data[ss->tail] = bw;
	ss->iops_data[ss->tail] = iops;

	if (ss->state & __FIO_SS_IOPS)
		new_val = iops;
	else
		new_val = bw;

	if (ss->state & __FIO_SS_BUFFER_FULL || ss->tail - ss->head == ss->dur - 1) {
		if (!(ss->state & __FIO_SS_BUFFER_FULL)) {
			/* first time through */
			for(i = 0, ss->sum_y = 0; i < ss->dur; i++) {
				if (ss->state & __FIO_SS_IOPS)
					ss->sum_y += ss->iops_data[i];
				else
					ss->sum_y += ss->bw_data[i];
				j = (ss->head + i) % ss->dur;
				if (ss->state & __FIO_SS_IOPS)
					ss->sum_xy += i * ss->iops_data[j];
				else
					ss->sum_xy += i * ss->bw_data[j];
			}
			ss->state |= __FIO_SS_BUFFER_FULL;
		} else {		/* easy to update the sums */
			ss->sum_y -= ss->oldest_y;
			ss->sum_y += new_val;
			ss->sum_xy = ss->sum_xy - ss->sum_y + ss->dur * new_val;
		}

		if (ss->state & __FIO_SS_IOPS)
			ss->oldest_y = ss->iops_data[ss->head];
		else
			ss->oldest_y = ss->bw_data[ss->head];

		/*
		 * calculate slope as (sum_xy - sum_x * sum_y / n) / (sum_(x^2)
		 * - (sum_x)^2 / n) This code assumes that all x values are
		 * equally spaced when they are often off by a few milliseconds.
		 * This assumption greatly simplifies the calculations.
		 */
		ss->slope = (ss->sum_xy - (double) ss->sum_x * ss->sum_y / ss->dur) /
				(ss->sum_x_sq - (double) ss->sum_x * ss->sum_x / ss->dur);
		if (ss->state & __FIO_SS_PCT)
			ss->criterion = 100.0 * ss->slope / (ss->sum_y / ss->dur);
		else
			ss->criterion = ss->slope;

		dprint(FD_STEADYSTATE, "sum_y: %llu, sum_xy: %llu, slope: %f, "
					"criterion: %f, limit: %f\n",
					(unsigned long long) ss->sum_y,
					(unsigned long long) ss->sum_xy,
					ss->slope, ss->criterion, ss->limit);

		result = ss->criterion * (ss->criterion < 0.0 ? -1.0 : 1.0);
		if (result < ss->limit)
			return true;
	}

	ss->tail = (ss->tail + 1) % ss->dur;
	if (ss->tail <= ss->head)
		ss->head = (ss->head + 1) % ss->dur;

	return false;
}

static bool steadystate_deviation(uint64_t iops, uint64_t bw,
				  struct thread_data *td)
{
	int i;
	double diff;
	double mean;

	struct steadystate_data *ss = &td->ss;

	ss->bw_data[ss->tail] = bw;
	ss->iops_data[ss->tail] = iops;

	if (ss->state & __FIO_SS_BUFFER_FULL || ss->tail - ss->head == ss->dur - 1) {
		if (!(ss->state & __FIO_SS_BUFFER_FULL)) {
			/* first time through */
			for(i = 0, ss->sum_y = 0; i < ss->dur; i++)
				if (ss->state & __FIO_SS_IOPS)
					ss->sum_y += ss->iops_data[i];
				else
					ss->sum_y += ss->bw_data[i];
			ss->state |= __FIO_SS_BUFFER_FULL;
		} else {		/* easy to update the sum */
			ss->sum_y -= ss->oldest_y;
			if (ss->state & __FIO_SS_IOPS)
				ss->sum_y += ss->iops_data[ss->tail];
			else
				ss->sum_y += ss->bw_data[ss->tail];
		}

		if (ss->state & __FIO_SS_IOPS)
			ss->oldest_y = ss->iops_data[ss->head];
		else
			ss->oldest_y = ss->bw_data[ss->head];

		mean = (double) ss->sum_y / ss->dur;
		ss->deviation = 0.0;

		for (i = 0; i < ss->dur; i++) {
			if (ss->state & __FIO_SS_IOPS)
				diff = ss->iops_data[i] - mean;
			else
				diff = ss->bw_data[i] - mean;
			ss->deviation = max(ss->deviation, diff * (diff < 0.0 ? -1.0 : 1.0));
		}

		if (ss->state & __FIO_SS_PCT)
			ss->criterion = 100.0 * ss->deviation / mean;
		else
			ss->criterion = ss->deviation;

		dprint(FD_STEADYSTATE, "sum_y: %llu, mean: %f, max diff: %f, "
					"objective: %f, limit: %f\n",
					(unsigned long long) ss->sum_y, mean,
					ss->deviation, ss->criterion, ss->limit);

		if (ss->criterion < ss->limit)
			return true;
	}

	ss->tail = (ss->tail + 1) % ss->dur;
	if (ss->tail <= ss->head)
		ss->head = (ss->head + 1) % ss->dur;

	return false;
}

void steadystate_check(void)
{
	int i, j, ddir, prev_groupid, group_ramp_time_over = 0;
	unsigned long rate_time;
	struct thread_data *td, *td2;
	struct timeval now;
	uint64_t group_bw = 0, group_iops = 0;
	uint64_t td_iops, td_bytes;
	bool ret;

	prev_groupid = -1;
	for_each_td(td, i) {
		struct steadystate_data *ss = &td->ss;

		if (!ss->dur || td->runstate <= TD_SETTING_UP ||
		    td->runstate >= TD_EXITED || (ss->state & __FIO_SS_ATTAINED))
			continue;

		td_iops = 0;
		td_bytes = 0;
		if (!td->o.group_reporting ||
		    (td->o.group_reporting && td->groupid != prev_groupid)) {
			group_bw = 0;
			group_iops = 0;
			group_ramp_time_over = 0;
		}
		prev_groupid = td->groupid;

		fio_gettime(&now, NULL);
		if (ss->ramp_time && !(ss->state & __FIO_SS_RAMP_OVER)) {
			/*
			 * Begin recording data one second after ss->ramp_time
			 * has elapsed
			 */
			if (utime_since(&td->epoch, &now) >= (ss->ramp_time + 1000000L))
				ss->state |= __FIO_SS_RAMP_OVER;
		}

		td_io_u_lock(td);
		for (ddir = DDIR_READ; ddir < DDIR_RWDIR_CNT; ddir++) {
			td_iops += td->io_blocks[ddir];
			td_bytes += td->io_bytes[ddir];
		}
		td_io_u_unlock(td);

		rate_time = mtime_since(&ss->prev_time, &now);
		memcpy(&ss->prev_time, &now, sizeof(now));

		/*
		 * Begin monitoring when job starts but don't actually use
		 * data in checking stopping criterion until ss->ramp_time is
		 * over. This ensures that we will have a sane value in
		 * prev_iops/bw the first time through after ss->ramp_time
		 * is done.
		 */
		if (ss->state & __FIO_SS_RAMP_OVER) {
			group_bw += 1000 * (td_bytes - ss->prev_bytes) / rate_time;
			group_iops += 1000 * (td_iops - ss->prev_iops) / rate_time;
			++group_ramp_time_over;
		}
		ss->prev_iops = td_iops;
		ss->prev_bytes = td_bytes;

		if (td->o.group_reporting && !(ss->state & __FIO_SS_DATA))
			continue;

		/*
		 * Don't begin checking criterion until ss->ramp_time is over
		 * for at least one thread in group
		 */
		if (!group_ramp_time_over)
			continue;

		dprint(FD_STEADYSTATE, "steadystate_check() thread: %d, "
					"groupid: %u, rate_msec: %ld, "
					"iops: %llu, bw: %llu, head: %d, tail: %d\n",
					i, td->groupid, rate_time,
					(unsigned long long) group_iops,
					(unsigned long long) group_bw,
					ss->head, ss->tail);

		if (td->o.ss & __FIO_SS_SLOPE)
			ret = steadystate_slope(group_iops, group_bw, td);
		else
			ret = steadystate_deviation(group_iops, group_bw, td);

		if (ret) {
			if (td->o.group_reporting) {
				for_each_td(td2, j) {
					if (td2->groupid == td->groupid) {
						td2->ss.state |= __FIO_SS_ATTAINED;
						fio_mark_td_terminate(td2);
					}
				}
			} else {
				ss->state |= __FIO_SS_ATTAINED;
				fio_mark_td_terminate(td);
			}
		}
	}
}

int td_steadystate_init(struct thread_data *td)
{
	struct steadystate_data *ss = &td->ss;
	struct thread_options *o = &td->o;
	struct thread_data *td2;
	int j;

	memset(ss, 0, sizeof(*ss));

	if (o->ss_dur) {
		steadystate_enabled = true;
		o->ss_dur /= 1000000L;

		/* put all steady state info in one place */
		ss->dur = o->ss_dur;
		ss->limit = o->ss_limit.u.f;
		ss->ramp_time = o->ss_ramp_time;

		ss->state = o->ss;
		if (!td->ss.ramp_time)
			ss->state |= __FIO_SS_RAMP_OVER;

		ss->sum_x = o->ss_dur * (o->ss_dur - 1) / 2;
		ss->sum_x_sq = (o->ss_dur - 1) * (o->ss_dur) * (2*o->ss_dur - 1) / 6;
	}

	/* make sure that ss options are consistent within reporting group */
	for_each_td(td2, j) {
		if (td2->groupid == td->groupid) {
			struct steadystate_data *ss2 = &td2->ss;

			if (ss2->dur != ss->dur ||
			    ss2->limit != ss->limit ||
			    ss2->ramp_time != ss->ramp_time ||
			    ss2->state != ss->state ||
			    ss2->sum_x != ss->sum_x ||
			    ss2->sum_x_sq != ss->sum_x_sq) {
				td_verror(td, EINVAL, "job rejected: steadystate options must be consistent within reporting groups");
				return 1;
			}
		}
	}

	return 0;
}

uint64_t steadystate_bw_mean(struct thread_stat *ts)
{
	int i;
	uint64_t sum;

	for (i = 0, sum = 0; i < ts->ss_dur; i++)
		sum += ts->ss_bw_data[i];

	return sum / ts->ss_dur;
}

uint64_t steadystate_iops_mean(struct thread_stat *ts)
{
	int i;
	uint64_t sum;

	for (i = 0, sum = 0; i < ts->ss_dur; i++)
		sum += ts->ss_iops_data[i];

	return sum / ts->ss_dur;
}
Commit	Line	Data
ba8fb6f6 VF	1	#include <stdlib.h>
ba8fb6f6 VF	2
16e56d25 VF	3	#include "fio.h"
	4	#include "steadystate.h"
	5	#include "helper_thread.h"
	6
84784e07	7	bool steadystate_enabled = false;
4cd5b75b	8
f0c50c66 JA	9	static void steadystate_alloc(struct thread_data *td)
	10	{
	11	int i;
	12
bb49c8bd VF	13	td->ss.bw_data = malloc(td->ss.dur * sizeof(uint64_t));
bb49c8bd VF	14	td->ss.iops_data = malloc(td->ss.dur * sizeof(uint64_t));
f0c50c66 JA	15	/* initialize so that it is obvious if the cache is not full in the output */
	16	for (i = 0; i < td->ss.dur; i++)
	17	td->ss.iops_data[i] = td->ss.bw_data[i] = 0;
bb49c8bd VF	18
bb49c8bd VF	19	td->ss.state \|= __FIO_SS_DATA;
f0c50c66 JA	20	}
f0c50c66 JA	21
4cd5b75b	22	void steadystate_setup(void)
16e56d25 VF	23	{
	24	int i, prev_groupid;
	25	struct thread_data td, prev_td;
	26
84784e07	27	if (!steadystate_enabled)
16e56d25 VF	28	return;
	29
	30	/*
	31	* if group reporting is enabled, identify the last td
	32	* for each group and use it for storing steady state
	33	* data
	34	*/
	35	prev_groupid = -1;
	36	prev_td = NULL;
	37	for_each_td(td, i) {
bb49c8bd	38	if (!td->ss.dur)
ba8fb6f6 VF	39	continue;
	40
	41	if (!td->o.group_reporting) {
	42	steadystate_alloc(td);
16e56d25	43	continue;
ba8fb6f6	44	}
16e56d25 VF	45
16e56d25 VF	46	if (prev_groupid != td->groupid) {
ba8fb6f6	47	if (prev_td != NULL) {
ba8fb6f6 VF	48	steadystate_alloc(prev_td);
ba8fb6f6 VF	49	}
16e56d25 VF	50	prev_groupid = td->groupid;
	51	}
	52	prev_td = td;
	53	}
	54
ba8fb6f6	55	if (prev_td != NULL && prev_td->o.group_reporting) {
ba8fb6f6 VF	56	steadystate_alloc(prev_td);
	57	}
	58	}
	59
9d193019	60	static bool steadystate_slope(uint64_t iops, uint64_t bw,
4cd5b75b	61	struct thread_data *td)
16e56d25	62	{
ba8fb6f6	63	int i, j;
16e56d25	64	double result;
16e56d25	65	struct steadystate_data *ss = &td->ss;
9d193019	66	uint64_t new_val;
16e56d25	67
ba8fb6f6 VF	68	ss->bw_data[ss->tail] = bw;
ba8fb6f6 VF	69	ss->iops_data[ss->tail] = iops;
16e56d25	70
5b4b6586	71	if (ss->state & __FIO_SS_IOPS)
7be78a8a JA	72	new_val = iops;
	73	else
	74	new_val = bw;
	75
17df7023 VF	76	if (ss->state & __FIO_SS_BUFFER_FULL \|\| ss->tail - ss->head == ss->dur - 1) {
	77	if (!(ss->state & __FIO_SS_BUFFER_FULL)) {
	78	/* first time through */
	79	for(i = 0, ss->sum_y = 0; i < ss->dur; i++) {
5b4b6586	80	if (ss->state & __FIO_SS_IOPS)
7be78a8a JA	81	ss->sum_y += ss->iops_data[i];
	82	else
	83	ss->sum_y += ss->bw_data[i];
17df7023	84	j = (ss->head + i) % ss->dur;
5b4b6586	85	if (ss->state & __FIO_SS_IOPS)
94f218f6	86	ss->sum_xy += i * ss->iops_data[j];
7be78a8a	87	else
94f218f6	88	ss->sum_xy += i * ss->bw_data[j];
16e56d25	89	}
17df7023	90	ss->state \|= __FIO_SS_BUFFER_FULL;
16e56d25 VF	91	} else { /* easy to update the sums */
16e56d25 VF	92	ss->sum_y -= ss->oldest_y;
ba8fb6f6 VF	93	ss->sum_y += new_val;
ba8fb6f6 VF	94	ss->sum_xy = ss->sum_xy - ss->sum_y + ss->dur * new_val;
16e56d25 VF	95	}
16e56d25 VF	96
5b4b6586	97	if (ss->state & __FIO_SS_IOPS)
7be78a8a JA	98	ss->oldest_y = ss->iops_data[ss->head];
	99	else
	100	ss->oldest_y = ss->bw_data[ss->head];
16e56d25 VF	101
16e56d25 VF	102	/*
7be78a8a JA	103	* calculate slope as (sum_xy - sum_x * sum_y / n) / (sum_(x^2)
	104	* - (sum_x)^2 / n) This code assumes that all x values are
	105	* equally spaced when they are often off by a few milliseconds.
	106	* This assumption greatly simplifies the calculations.
16e56d25	107	*/
7be78a8a JA	108	ss->slope = (ss->sum_xy - (double) ss->sum_x * ss->sum_y / ss->dur) /
7be78a8a JA	109	(ss->sum_x_sq - (double) ss->sum_x * ss->sum_x / ss->dur);
e6a6a984	110	if (ss->state & __FIO_SS_PCT)
7be78a8a JA	111	ss->criterion = 100.0 * ss->slope / (ss->sum_y / ss->dur);
	112	else
	113	ss->criterion = ss->slope;
16e56d25	114
7be78a8a JA	115	dprint(FD_STEADYSTATE, "sum_y: %llu, sum_xy: %llu, slope: %f, "
7be78a8a JA	116	"criterion: %f, limit: %f\n",
9d193019 VF	117	(unsigned long long) ss->sum_y,
	118	(unsigned long long) ss->sum_xy,
	119	ss->slope, ss->criterion, ss->limit);
16e56d25	120
6da94b07	121	result = ss->criterion * (ss->criterion < 0.0 ? -1.0 : 1.0);
16e56d25 VF	122	if (result < ss->limit)
	123	return true;
	124	}
	125
	126	ss->tail = (ss->tail + 1) % ss->dur;
	127	if (ss->tail <= ss->head)
	128	ss->head = (ss->head + 1) % ss->dur;
4cd5b75b	129
16e56d25 VF	130	return false;
	131	}
	132
9d193019	133	static bool steadystate_deviation(uint64_t iops, uint64_t bw,
4cd5b75b	134	struct thread_data *td)
16e56d25 VF	135	{
	136	int i;
	137	double diff;
	138	double mean;
16e56d25 VF	139
	140	struct steadystate_data *ss = &td->ss;
	141
ba8fb6f6 VF	142	ss->bw_data[ss->tail] = bw;
ba8fb6f6 VF	143	ss->iops_data[ss->tail] = iops;
16e56d25	144
17df7023 VF	145	if (ss->state & __FIO_SS_BUFFER_FULL \|\| ss->tail - ss->head == ss->dur - 1) {
	146	if (!(ss->state & __FIO_SS_BUFFER_FULL)) {
	147	/* first time through */
	148	for(i = 0, ss->sum_y = 0; i < ss->dur; i++)
5b4b6586	149	if (ss->state & __FIO_SS_IOPS)
7be78a8a JA	150	ss->sum_y += ss->iops_data[i];
	151	else
	152	ss->sum_y += ss->bw_data[i];
17df7023	153	ss->state \|= __FIO_SS_BUFFER_FULL;
16e56d25 VF	154	} else { /* easy to update the sum */
16e56d25 VF	155	ss->sum_y -= ss->oldest_y;
5b4b6586	156	if (ss->state & __FIO_SS_IOPS)
7be78a8a JA	157	ss->sum_y += ss->iops_data[ss->tail];
	158	else
	159	ss->sum_y += ss->bw_data[ss->tail];
16e56d25 VF	160	}
16e56d25 VF	161
5b4b6586	162	if (ss->state & __FIO_SS_IOPS)
7be78a8a JA	163	ss->oldest_y = ss->iops_data[ss->head];
	164	else
	165	ss->oldest_y = ss->bw_data[ss->head];
	166
16e56d25	167	mean = (double) ss->sum_y / ss->dur;
ba8fb6f6	168	ss->deviation = 0.0;
16e56d25	169
4cd5b75b	170	for (i = 0; i < ss->dur; i++) {
5b4b6586	171	if (ss->state & __FIO_SS_IOPS)
7be78a8a JA	172	diff = ss->iops_data[i] - mean;
	173	else
	174	diff = ss->bw_data[i] - mean;
6da94b07	175	ss->deviation = max(ss->deviation, diff * (diff < 0.0 ? -1.0 : 1.0));
16e56d25 VF	176	}
16e56d25 VF	177
e6a6a984	178	if (ss->state & __FIO_SS_PCT)
7be78a8a JA	179	ss->criterion = 100.0 * ss->deviation / mean;
	180	else
	181	ss->criterion = ss->deviation;
16e56d25	182
7be78a8a JA	183	dprint(FD_STEADYSTATE, "sum_y: %llu, mean: %f, max diff: %f, "
7be78a8a JA	184	"objective: %f, limit: %f\n",
9d193019 VF	185	(unsigned long long) ss->sum_y, mean,
9d193019 VF	186	ss->deviation, ss->criterion, ss->limit);
16e56d25 VF	187
	188	if (ss->criterion < ss->limit)
	189	return true;
	190	}
	191
	192	ss->tail = (ss->tail + 1) % ss->dur;
	193	if (ss->tail <= ss->head)
	194	ss->head = (ss->head + 1) % ss->dur;
4cd5b75b	195
16e56d25 VF	196	return false;
16e56d25 VF	197	}
4cd5b75b JA	198
	199	void steadystate_check(void)
	200	{
	201	int i, j, ddir, prev_groupid, group_ramp_time_over = 0;
	202	unsigned long rate_time;
	203	struct thread_data td, td2;
	204	struct timeval now;
9d193019 VF	205	uint64_t group_bw = 0, group_iops = 0;
9d193019 VF	206	uint64_t td_iops, td_bytes;
4cd5b75b JA	207	bool ret;
	208
	209	prev_groupid = -1;
	210	for_each_td(td, i) {
	211	struct steadystate_data *ss = &td->ss;
	212
7be78a8a	213	if (!ss->dur \|\| td->runstate <= TD_SETTING_UP \|\|
5b4b6586	214	td->runstate >= TD_EXITED \|\| (ss->state & __FIO_SS_ATTAINED))
4cd5b75b JA	215	continue;
	216
	217	td_iops = 0;
	218	td_bytes = 0;
	219	if (!td->o.group_reporting \|\|
	220	(td->o.group_reporting && td->groupid != prev_groupid)) {
	221	group_bw = 0;
	222	group_iops = 0;
	223	group_ramp_time_over = 0;
	224	}
	225	prev_groupid = td->groupid;
	226
	227	fio_gettime(&now, NULL);
5b4b6586	228	if (ss->ramp_time && !(ss->state & __FIO_SS_RAMP_OVER)) {
4cd5b75b JA	229	/*
	230	* Begin recording data one second after ss->ramp_time
	231	* has elapsed
	232	*/
	233	if (utime_since(&td->epoch, &now) >= (ss->ramp_time + 1000000L))
5b4b6586 JA	234	ss->state \|= __FIO_SS_RAMP_OVER;
5b4b6586 JA	235	}
4cd5b75b JA	236
	237	td_io_u_lock(td);
	238	for (ddir = DDIR_READ; ddir < DDIR_RWDIR_CNT; ddir++) {
	239	td_iops += td->io_blocks[ddir];
	240	td_bytes += td->io_bytes[ddir];
	241	}
	242	td_io_u_unlock(td);
	243
	244	rate_time = mtime_since(&ss->prev_time, &now);
	245	memcpy(&ss->prev_time, &now, sizeof(now));
	246
	247	/*
	248	* Begin monitoring when job starts but don't actually use
	249	* data in checking stopping criterion until ss->ramp_time is
	250	* over. This ensures that we will have a sane value in
	251	* prev_iops/bw the first time through after ss->ramp_time
	252	* is done.
	253	*/
5b4b6586	254	if (ss->state & __FIO_SS_RAMP_OVER) {
4cd5b75b JA	255	group_bw += 1000 * (td_bytes - ss->prev_bytes) / rate_time;
	256	group_iops += 1000 * (td_iops - ss->prev_iops) / rate_time;
	257	++group_ramp_time_over;
	258	}
	259	ss->prev_iops = td_iops;
	260	ss->prev_bytes = td_bytes;
	261
ec55e631	262	if (td->o.group_reporting && !(ss->state & __FIO_SS_DATA))
4cd5b75b JA	263	continue;
4cd5b75b JA	264
7be78a8a JA	265	/*
	266	* Don't begin checking criterion until ss->ramp_time is over
	267	* for at least one thread in group
	268	*/
4cd5b75b JA	269	if (!group_ramp_time_over)
	270	continue;
	271
7be78a8a JA	272	dprint(FD_STEADYSTATE, "steadystate_check() thread: %d, "
7be78a8a JA	273	"groupid: %u, rate_msec: %ld, "
9d193019 VF	274	"iops: %llu, bw: %llu, head: %d, tail: %d\n",
	275	i, td->groupid, rate_time,
	276	(unsigned long long) group_iops,
	277	(unsigned long long) group_bw,
	278	ss->head, ss->tail);
4cd5b75b	279
f0c50c66	280	if (td->o.ss & __FIO_SS_SLOPE)
4cd5b75b JA	281	ret = steadystate_slope(group_iops, group_bw, td);
	282	else
	283	ret = steadystate_deviation(group_iops, group_bw, td);
	284
	285	if (ret) {
	286	if (td->o.group_reporting) {
	287	for_each_td(td2, j) {
	288	if (td2->groupid == td->groupid) {
5b4b6586	289	td2->ss.state \|= __FIO_SS_ATTAINED;
4cd5b75b JA	290	fio_mark_td_terminate(td2);
	291	}
	292	}
	293	} else {
5b4b6586	294	ss->state \|= __FIO_SS_ATTAINED;
4cd5b75b JA	295	fio_mark_td_terminate(td);
	296	}
	297	}
	298	}
	299	}
	300
56a90eba	301	int td_steadystate_init(struct thread_data *td)
f0c50c66 JA	302	{
	303	struct steadystate_data *ss = &td->ss;
	304	struct thread_options *o = &td->o;
56a90eba VF	305	struct thread_data *td2;
56a90eba VF	306	int j;
f0c50c66 JA	307
	308	memset(ss, 0, sizeof(*ss));
	309
56a90eba VF	310	if (o->ss_dur) {
	311	steadystate_enabled = true;
	312	o->ss_dur /= 1000000L;
	313
	314	/* put all steady state info in one place */
	315	ss->dur = o->ss_dur;
	316	ss->limit = o->ss_limit.u.f;
	317	ss->ramp_time = o->ss_ramp_time;
f0c50c66	318
56a90eba VF	319	ss->state = o->ss;
	320	if (!td->ss.ramp_time)
	321	ss->state \|= __FIO_SS_RAMP_OVER;
4cd5b75b	322
56a90eba VF	323	ss->sum_x = o->ss_dur * (o->ss_dur - 1) / 2;
56a90eba VF	324	ss->sum_x_sq = (o->ss_dur - 1) * (o->ss_dur) * (2*o->ss_dur - 1) / 6;
56a90eba	325	}
5b4b6586	326
56a90eba VF	327	/* make sure that ss options are consistent within reporting group */
	328	for_each_td(td2, j) {
	329	if (td2->groupid == td->groupid) {
	330	struct steadystate_data *ss2 = &td2->ss;
	331
	332	if (ss2->dur != ss->dur \|\|
	333	ss2->limit != ss->limit \|\|
	334	ss2->ramp_time != ss->ramp_time \|\|
56a90eba VF	335	ss2->state != ss->state \|\|
	336	ss2->sum_x != ss->sum_x \|\|
	337	ss2->sum_x_sq != ss->sum_x_sq) {
	338	td_verror(td, EINVAL, "job rejected: steadystate options must be consistent within reporting groups");
	339	return 1;
	340	}
	341	}
	342	}
f0c50c66	343
56a90eba	344	return 0;
f0c50c66	345	}
d685adfb	346
9d193019	347	uint64_t steadystate_bw_mean(struct thread_stat *ts)
d685adfb VF	348	{
d685adfb VF	349	int i;
9d193019	350	uint64_t sum;
d685adfb	351
bb49c8bd VF	352	for (i = 0, sum = 0; i < ts->ss_dur; i++)
bb49c8bd VF	353	sum += ts->ss_bw_data[i];
d685adfb	354
bb49c8bd	355	return sum / ts->ss_dur;
d685adfb VF	356	}
d685adfb VF	357
9d193019	358	uint64_t steadystate_iops_mean(struct thread_stat *ts)
d685adfb VF	359	{
d685adfb VF	360	int i;
9d193019	361	uint64_t sum;
d685adfb	362
bb49c8bd VF	363	for (i = 0, sum = 0; i < ts->ss_dur; i++)
bb49c8bd VF	364	sum += ts->ss_iops_data[i];
d685adfb	365
bb49c8bd	366	return sum / ts->ss_dur;
d685adfb	367	}