queues []*queue

	// currentR is the amount of seat-seconds allocated per queue since process startup.
	// This is our generalization of the progress meter named R in the original fair queuing work.
	currentR fqrequest.SeatSeconds

	// lastRealTime is what `clock.Now()` yielded when `virtualTime` was last updated
	lastRealTime time.Time

	// robinIndex is the index of the last queue dispatched
	robinIndex int