)

// heapRetained returns an estimate of the current heap RSS.
func heapRetained() uint64 {
	return gcController.heapInUse.load() + gcController.heapFree.load()
}

// gcPaceScavenger updates the scavenger's pacing, particularly
// its rate and RSS goal. For this, it requires the current heapGoal,
// and the heapGoal for the previous GC cycle.
//

	trace := traceAcquire()
	if trace.ok() {
		trace.HeapGoal()
		traceRelease(trace)
	}

	trigger, heapGoal := gcController.trigger()
	gcPaceSweeper(trigger)
	gcPaceScavenger(gcController.memoryLimit.Load(), heapGoal, gcController.lastHeapGoal)