idleMarkWorkers atomic.Uint64

	// assistWorkPerByte is the ratio of scan work to allocated
	// bytes that should be performed by mutator assists. This is
	// computed at the beginning of each cycle and updated every
	// time heapScan is updated.
	assistWorkPerByte atomic.Float64

	// assistBytesPerWork is 1/assistWorkPerByte.
	//
	// Note that because this is read and written independently

	// we over-assist to build up credit for future allocations
	// and amortize the cost of assisting.
	assistWorkPerByte := gcController.assistWorkPerByte.Load()
	assistBytesPerWork := gcController.assistBytesPerWork.Load()
	debtBytes := -gp.gcAssistBytes
	scanWork := int64(assistWorkPerByte * float64(debtBytes))
	if scanWork < gcOverAssistWork {
		scanWork = gcOverAssistWork

	c.heapLive.Store(trigger)
	c.heapScan.Add(int64(float64(trigger-c.heapMarked) * scannableFrac))
	c.startCycle(0, gomaxprocs, gcTrigger{kind: gcTriggerHeap})
}

func (c *GCController) AssistWorkPerByte() float64 {
	return c.assistWorkPerByte.Load()
}

func (c *GCController) HeapGoal() uint64 {
	return c.heapGoal()
}

func (c *GCController) HeapLive() uint64 {
	return c.heapLive.Load()
}

					// must be interpreted as GC assists not kicking in at all, and just round up. All
					// downstream values will then have this accounted for.
					assistRatio := c.AssistWorkPerByte()
					utilization := assistRatio * cycle.allocRate / (assistRatio*cycle.allocRate + cycle.scanRate)
					if utilization < GCBackgroundUtilization {
						utilization = GCBackgroundUtilization
					}

		// Flush assist credit to the global pool. This gives
		// better information to pacing if the application is
		// rapidly creating an exiting goroutines.
		assistWorkPerByte := gcController.assistWorkPerByte.Load()
		scanCredit := int64(assistWorkPerByte * float64(gp.gcAssistBytes))
		gcController.bgScanCredit.Add(scanCredit)
		gp.gcAssistBytes = 0
	}

	dropg()