}
	}
	for i := 0; i < workers-1; i++ {
		if !c.AddIdleMarkWorker() {
			t.Fatalf("expected to be able to add idle mark workers after adding again: i=%d", i)
		}
	}
	for i := 0; i < 10; i++ {
		if !c.AddIdleMarkWorker() {
			t.Fatalf("expected to be able to add idle mark workers interleaved: i=%d", i)
		}
		if c.AddIdleMarkWorker() {

	}
	n, ok := parseByteCount(p)
	if !ok {
		print("GOMEMLIMIT=", p, "\n")
		throw("malformed GOMEMLIMIT; see `go doc runtime/debug.SetMemoryLimit`")
	}
	return n
}

// addIdleMarkWorker attempts to add a new idle mark worker.
//
// If this returns true, the caller must become an idle mark worker unless
// there's no background mark worker goroutines in the pool. This case is

	c.assistTime.Store(assistTime)
	c.endCycle(elapsed, gomaxprocs, false)
	c.resetLive(bytesMarked)
	c.commit(false)
}

func (c *GCController) AddIdleMarkWorker() bool {
	return c.addIdleMarkWorker()
}

func (c *GCController) NeedIdleMarkWorker() bool {
	return c.needIdleMarkWorker()
}

func (c *GCController) RemoveIdleMarkWorker() {
	c.removeIdleMarkWorker()

	//
	// If we're in the GC mark phase, can safely scan and blacken objects,
	// and have work to do, run idle-time marking rather than give up the P.
	if gcBlackenEnabled != 0 && gcMarkWorkAvailable(pp) && gcController.addIdleMarkWorker() {
		node := (*gcBgMarkWorkerNode)(gcBgMarkWorkerPool.pop())
		if node != nil {
			pp.gcMarkWorkerMode = gcMarkWorkerIdleMode
			gp := node.gp.ptr()

			trace := traceAcquire()