sys/cam/cam_iosched.c

79  * where N is the number of samples that 86% of the current
246 	 * Information about the current rate limiters, if any
251 	int		current;	/* Current rate limiter */
283 	set_max = 0,			/* current = max */
431 	if (ios->current <= 0 || ios->pending < ios->current)
441 	if (ios->current <= 0 || ios->pending < ios->current)
451 	if (ios->current <= 0 || ios->pending != ios->current)
461 	ios->l_value1 = ios->current / ios->softc->quanta;
478 	new_ios = (int)((ios->current * (uint64_t)ios->softc->this_frac) >> 16);
479 	if (new_ios < 1 && ios->l_value2 < ios->current) {
505 	 * otherwise wait. If current iops is 0, treat that
508 	if (ios->current > 0 && ios->l_value1 <= 0)
529 	/* ios->current is in kB/s, so scale to bytes */
530 	ios->l_value1 = ios->current * 1000 / ios->softc->quanta;
544 	 * then too bad, that's lost. Also, ios->current
551 	bw = (int)((ios->current * 1000ull * (uint64_t)ios->softc->this_frac) >> 16);
575 	 * Also note that if the current limit is <= 0,
578 	if (ios->current > 0 && ios->l_value1 <= 0)
681 		if (isc->write_stats.current != isc->write_stats.max)
683 			    isc->write_stats.current, isc->write_stats.max);
684 		isc->read_stats.current = isc->read_stats.max;
685 		isc->write_stats.current = isc->write_stats.max;
686 		isc->trim_stats.current = isc->trim_stats.max;
689 		old = isc->write_stats.current;
718 			isc->write_stats.current = isc->write_stats.current *
721 			isc->write_stats.current = isc->write_stats.current *
729 		if (isc->write_stats.current < isc->write_stats.min)
730 			isc->write_stats.current = isc->write_stats.min;
731 		if (isc->write_stats.current > isc->write_stats.max)
732 			isc->write_stats.current = isc->write_stats.max;
733 		if (old != isc->write_stats.current && 	iosched_debug)
735 			    old, isc->write_stats.current,
850 	ios->max = ios->current = 300000;
1064 	    OID_AUTO, "current", CTLFLAG_RW,
1065 	    &ios->current, 0,
1066 	    "current resource");
1353 	 * If pending read, prefer that based on current read bias
1369 	 * See if our current limiter allows this I/O.
1461 	 * If pending read, prefer that based on current read bias setting. The
1483 	 * See if our current limiter allows this I/O. Because we only call this
1673 	 * set the last tick time to one less than the current ticks minus the