}

// HeapGoal reads the current heap goal and emits a HeapGoal event.
func (tl traceLocker) HeapGoal() {
	heapGoal := gcController.heapGoal()
	if heapGoal == ^uint64(0) {
		// Heap-based triggering is disabled.
		heapGoal = 0
	}
	tl.eventWriter(traceGoRunning, traceProcRunning).commit(traceEvHeapGoal, traceArg(heapGoal))
}

	EvHeapAlloc         = 33 // gcController.heapLive change [timestamp, heap live bytes]
	EvHeapGoal          = 34 // gcController.heapGoal change [timestamp, heap goal bytes]
	EvTimerGoroutine    = 35 // denotes timer goroutine [timer goroutine id]
	EvFutileWakeup      = 36 // denotes that the previous wakeup of this goroutine was futile [timestamp]

	EvGCMarkAssistEnd    // GC mark assist done [timestamp]
	EvHeapAlloc          // gcController.heapLive change [timestamp, heap alloc in bytes]
	EvHeapGoal           // gcController.heapGoal() change [timestamp, heap goal in bytes]

	// Annotations.
	EvGoLabel         // apply string label to current running goroutine [timestamp, label string ID]

// For the former, the goal is defined as:
//   (retainExtraPercent+100) / 100 * (heapGoal / lastHeapGoal) * lastHeapInUse
//
// Essentially, we wish to have the application's RSS track the heap goal, but
// the heap goal is defined in terms of bytes of objects, rather than pages like
// RSS. As a result, we need to take into account for fragmentation internal to
// spans. heapGoal / lastHeapGoal defines the ratio between the current heap goal

	traceEvGCMarkAssistEnd    // GC mark assist done [timestamp]
	traceEvHeapAlloc          // gcController.heapLive change [timestamp, heap alloc in bytes]
	traceEvHeapGoal           // gcController.heapGoal() change [timestamp, heap goal in bytes]

	// Annotations.
	traceEvGoLabel         // apply string label to current running goroutine [timestamp, label string ID]

	m := ev.Metric()
	switch m.Name {
	case "/memory/classes/heap/objects:bytes":
		ctx.HeapAlloc(ctx.elapsed(ev.Time()), m.Value.Uint64())
	case "/gc/heap/goal:bytes":
		ctx.HeapGoal(ctx.elapsed(ev.Time()), m.Value.Uint64())
	case "/sched/gomaxprocs:threads":
		ctx.Gomaxprocs(m.Value.Uint64())
	}
}

// procRangeGenerator implements a generic handler for EventRange* events whose Scope.Kind is

EventBatch gen=1 m=167926 time=28113086275999 size=324
ProcStatus dt=295 p=0 pstatus=1
GoStatus dt=5 g=1 m=167926 gstatus=2
ProcsChange dt=405 procs_value=48 stack=1
STWBegin dt=65 kind_string=21 stack=2
HeapGoal dt=2 heapgoal_value=4194304
ProcStatus dt=4 p=1 pstatus=2
ProcStatus dt=1 p=2 pstatus=2
ProcStatus dt=1 p=3 pstatus=2
ProcStatus dt=1 p=4 pstatus=2
ProcStatus dt=1 p=5 pstatus=2
ProcStatus dt=1 p=6 pstatus=2

	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()
}

func (c *GCController) HeapMarked() uint64 {
	return c.heapMarked
}

	EvHeapAlloc         event.Type = 33 // gcController.heapLive change [timestamp, heap live bytes]
	EvHeapGoal          event.Type = 34 // gcController.heapGoal change [timestamp, heap goal bytes]
	EvTimerGoroutine    event.Type = 35 // denotes timer goroutine [timer goroutine id]

// the amount already in use. The proportion is controlled by GOGC environment variable
// (100 by default). If GOGC=100 and we're using 4M, we'll GC again when we get to 8M
// (this mark is computed by the gcController.heapGoal method). This keeps the GC cost in
// linear proportion to the allocation cost. Adjusting GOGC just changes the linear constant
// (and also the amount of extra memory used).

// Oblets
//