Lines Matching defs:backoff

254 /* "tunables" for per-platform backoff constants. */
266 /* calculate the backoff interval */
268 default_lock_backoff(uint_t backoff)
270 	uint_t cap;		/* backoff cap calculated */
272 	if (backoff == 0) {
273 		backoff = mutex_backoff_base;
275 		return (backoff);
285 		 * cap-factor).  Maximum backoff is set to this value, and
286 		 * actual backoff is a random number from 0 to the current max.
293 	/* calculate new backoff value */
294 	backoff <<= mutex_backoff_shift;	/* increase backoff */
295 	if (backoff > cap) {
297 			backoff = mutex_backoff_base;
299 			backoff = cap;
302 	return (backoff);
309 default_lock_delay(uint_t backoff)
312 	uint_t cur_backoff;	/* calculated backoff */
316 	 * Modify backoff by a random amount to avoid lockstep, and to
317 	 * make it probable that some thread gets a small backoff, and
321 	cur_backoff = (uint_t)(rnd % (backoff - mutex_backoff_base + 1)) +
351 	uint_t		backoff = 0;	/* current backoff */
384 	backoff = mutex_lock_backoff(0);	/* set base backoff */
386 		mutex_lock_delay(backoff); /* backoff delay */
395 			/* increase backoff only on failed attempt. */
396 			backoff = mutex_lock_backoff(backoff);
401 			backoff = mutex_lock_backoff(backoff);
406 			backoff = mutex_lock_backoff(0);
450 			/* reset backoff after turnstile */
451 			backoff = mutex_lock_backoff(0);
650 	uint_t backoff = 0;	/* current backoff */
667 			backoff = mutex_lock_backoff(0);
670 			backoff = mutex_lock_backoff(backoff);
672 		mutex_lock_delay(backoff);
684 	uint_t backoff = 0;	/* current backoff */
708 				backoff = mutex_lock_backoff(0);
711 				backoff = mutex_lock_backoff(backoff);
713 			mutex_lock_delay(backoff);