[fio.git] / time.c

#include <time.h>
#include <sys/time.h>

#include "fio.h"

static struct timeval genesis;

unsigned long utime_since(struct timeval *s, struct timeval *e)
{
	long sec, usec;

	sec = e->tv_sec - s->tv_sec;
	usec = e->tv_usec - s->tv_usec;
	if (sec > 0 && usec < 0) {
		sec--;
		usec += 1000000;
	}

	sec *= (double) 1000000;

	return sec + usec;
}

unsigned long utime_since_now(struct timeval *s)
{
	struct timeval t;

	fio_gettime(&t, NULL);
	return utime_since(s, &t);
}

unsigned long mtime_since(struct timeval *s, struct timeval *e)
{
	long sec, usec;

	sec = e->tv_sec - s->tv_sec;
	usec = e->tv_usec - s->tv_usec;
	if (sec > 0 && usec < 0) {
		sec--;
		usec += 1000000;
	}

	sec *= (double) 1000;
	usec /= (double) 1000;

	return sec + usec;
}

unsigned long mtime_since_now(struct timeval *s)
{
	struct timeval t;
	void *p = __builtin_return_address(0);

	fio_gettime(&t, p);
	return mtime_since(s, &t);
}

unsigned long time_since_now(struct timeval *s)
{
	return mtime_since_now(s) / 1000;
}

/*
 * busy looping version for the last few usec
 */
void __usec_sleep(unsigned int usec)
{
	struct timeval start;

	fio_gettime(&start, NULL);
	while (utime_since_now(&start) < usec)
		nop;
}

void usec_sleep(struct thread_data *td, unsigned long usec)
{
	struct timespec req, rem;

	req.tv_sec = usec / 1000000;
	req.tv_nsec = usec * 1000 - req.tv_sec * 1000000;

	do {
		if (usec < 5000) {
			__usec_sleep(usec);
			break;
		}

		rem.tv_sec = rem.tv_nsec = 0;
		if (nanosleep(&req, &rem) < 0)
			break;

		if ((rem.tv_sec + rem.tv_nsec) == 0)
			break;

		req.tv_nsec = rem.tv_nsec;
		req.tv_sec = rem.tv_sec;

		usec = rem.tv_sec * 1000000 + rem.tv_nsec / 1000;
	} while (!td->terminate);
}

void rate_throttle(struct thread_data *td, unsigned long time_spent,
		   unsigned int bytes, int ddir)
{
	unsigned long usec_cycle;

	if (!td->rate)
		return;

	usec_cycle = td->rate_usec_cycle * (bytes / td->min_bs[ddir]);

	if (time_spent < usec_cycle) {
		unsigned long s = usec_cycle - time_spent;

		td->rate_pending_usleep += s;
		if (td->rate_pending_usleep >= 100000) {
			usec_sleep(td, td->rate_pending_usleep);
			td->rate_pending_usleep = 0;
		}
	} else {
		long overtime = time_spent - usec_cycle;

		td->rate_pending_usleep -= overtime;
	}
}

unsigned long mtime_since_genesis(void)
{
	return mtime_since_now(&genesis);
}

static void fio_init time_init(void)
{
	fio_gettime(&genesis, NULL);
}

void fill_start_time(struct timeval *t)
{
	memcpy(t, &genesis, sizeof(genesis));
}
Commit	Line	Data
3c39a379 JA	1	#include <time.h>
	2	#include <sys/time.h>
	3
	4	#include "fio.h"
	5
263e529f JA	6	static struct timeval genesis;
263e529f JA	7
3c39a379 JA	8	unsigned long utime_since(struct timeval s, struct timeval e)
3c39a379 JA	9	{
1e97cce9	10	long sec, usec;
3c39a379 JA	11
	12	sec = e->tv_sec - s->tv_sec;
	13	usec = e->tv_usec - s->tv_usec;
	14	if (sec > 0 && usec < 0) {
	15	sec--;
	16	usec += 1000000;
	17	}
	18
	19	sec *= (double) 1000000;
	20
	21	return sec + usec;
	22	}
	23
69008999	24	unsigned long utime_since_now(struct timeval *s)
3c39a379 JA	25	{
	26	struct timeval t;
	27
02bcaa8c	28	fio_gettime(&t, NULL);
3c39a379 JA	29	return utime_since(s, &t);
	30	}
	31
	32	unsigned long mtime_since(struct timeval s, struct timeval e)
	33	{
1e97cce9	34	long sec, usec;
3c39a379 JA	35
	36	sec = e->tv_sec - s->tv_sec;
	37	usec = e->tv_usec - s->tv_usec;
	38	if (sec > 0 && usec < 0) {
	39	sec--;
	40	usec += 1000000;
	41	}
	42
	43	sec *= (double) 1000;
	44	usec /= (double) 1000;
	45
	46	return sec + usec;
	47	}
	48
	49	unsigned long mtime_since_now(struct timeval *s)
	50	{
	51	struct timeval t;
02bcaa8c	52	void *p = __builtin_return_address(0);
3c39a379	53
02bcaa8c	54	fio_gettime(&t, p);
3c39a379 JA	55	return mtime_since(s, &t);
	56	}
	57
	58	unsigned long time_since_now(struct timeval *s)
	59	{
	60	return mtime_since_now(s) / 1000;
	61	}
	62
	63	/*
	64	* busy looping version for the last few usec
	65	*/
b990b5c0	66	void __usec_sleep(unsigned int usec)
3c39a379 JA	67	{
	68	struct timeval start;
	69
02bcaa8c	70	fio_gettime(&start, NULL);
3c39a379 JA	71	while (utime_since_now(&start) < usec)
	72	nop;
	73	}
	74
	75	void usec_sleep(struct thread_data *td, unsigned long usec)
	76	{
	77	struct timespec req, rem;
	78
	79	req.tv_sec = usec / 1000000;
	80	req.tv_nsec = usec * 1000 - req.tv_sec * 1000000;
	81
	82	do {
	83	if (usec < 5000) {
	84	__usec_sleep(usec);
	85	break;
	86	}
	87
	88	rem.tv_sec = rem.tv_nsec = 0;
	89	if (nanosleep(&req, &rem) < 0)
	90	break;
	91
	92	if ((rem.tv_sec + rem.tv_nsec) == 0)
	93	break;
	94
	95	req.tv_nsec = rem.tv_nsec;
	96	req.tv_sec = rem.tv_sec;
	97
	98	usec = rem.tv_sec * 1000000 + rem.tv_nsec / 1000;
	99	} while (!td->terminate);
	100	}
	101
	102	void rate_throttle(struct thread_data *td, unsigned long time_spent,
a00735e6	103	unsigned int bytes, int ddir)
3c39a379 JA	104	{
	105	unsigned long usec_cycle;
	106
	107	if (!td->rate)
	108	return;
	109
a00735e6	110	usec_cycle = td->rate_usec_cycle * (bytes / td->min_bs[ddir]);
3c39a379 JA	111
	112	if (time_spent < usec_cycle) {
	113	unsigned long s = usec_cycle - time_spent;
	114
	115	td->rate_pending_usleep += s;
	116	if (td->rate_pending_usleep >= 100000) {
	117	usec_sleep(td, td->rate_pending_usleep);
	118	td->rate_pending_usleep = 0;
	119	}
	120	} else {
	121	long overtime = time_spent - usec_cycle;
	122
	123	td->rate_pending_usleep -= overtime;
	124	}
	125	}
263e529f JA	126
	127	unsigned long mtime_since_genesis(void)
	128	{
	129	return mtime_since_now(&genesis);
	130	}
	131
02bcaa8c	132	static void fio_init time_init(void)
263e529f	133	{
02bcaa8c	134	fio_gettime(&genesis, NULL);
263e529f	135	}
6043c579 JA	136
	137	void fill_start_time(struct timeval *t)
	138	{
	139	memcpy(t, &genesis, sizeof(genesis));
	140	}