def "correctly calculates stats for heaps"() {
        def heapStats = GarbageCollectionStats.forHeap(heapEvents)
        expect:
        heapStats.valid
        heapStats.eventCount == 5
        heapStats.gcRate == 3.0d
        heapStats.maxSizeInBytes == 1000
        heapStats.usedPercent == 50
    }

    def "correctly calculates stats for non-heaps"() {

            .addAll(getJvmArgs())
            .addAll(getManagedJvmArgs()).build();
    }

    /**
     * @return the list of jvm args we manage explicitly, for example, max heaps size or file encoding.
     * The result is a subset of options returned by {@link #getAllImmutableJvmArgs()}
     */
    protected List<String> getManagedJvmArgs() {
        List<String> args = new ArrayList<>();

	}

	// For small heaps, set the max trigger point at maxTriggerRatio of the way
	// from the live heap to the heap goal. This ensures we always have *some*
	// headroom when the GC actually starts. For larger heaps, set the max trigger
	// point at the goal, minus the minimum heap size.
	//
	// This choice follows from the fact that the minimum heap size is chosen

	// be very high if they were to be backed by huge pages (e.g. a few MiB makes
	// a huge difference for an 8 MiB heap, but barely any difference for a 1 GiB
	// heap). The benefit of huge pages is also not worth it for small heaps,
	// because only a very, very small part of the metadata is used for small heaps.
	//

//
// A note on latency: for sufficiently small heaps (<10s of GiB) this function will take constant
// time, but may take time proportional to the size of the mapped heap beyond that.
//
// The heap lock must not be held over this operation, since it will briefly acquire
// the heap lock.
//
// Must be called on the system stack because it acquires the heap lock.
//
//go:systemstack

	// structure is meant to represent the Go heap. At worst, copying this
	// would take ~160µs assuming a conservative copying rate of 25 GiB/s (the
	// copy will almost never trigger a page fault) for a 1 TiB heap with 4 MiB
	// arenas which is completely discontiguous. ~160µs is still a lot, but in
	// practice most platforms have 64 MiB arenas (which cuts this by a factor
	// of 16) and Go heaps are usually mostly contiguous, so the chance that

	// when stopping began (just before trying to stop Ps) and just after the
	// world started again.
	pauseNS int64

	// debug.gctrace heap sizes for this cycle.
	heap0, heap1, heap2 uint64

	// Cumulative estimated CPU usage.
	cpuStats
}

// GC runs a garbage collection and blocks the caller until the
// garbage collection is complete. It may also block the entire

	}
	if heap[i].timer != tw.timer {
		heap[i] = tw
	}
}

// siftDown puts the timer at position i in the right place
// in the heap by moving it down toward the bottom of the heap.
func (ts *timers) siftDown(i int) {
	heap := ts.heap
	n := len(heap)
	if i >= n {
		badTimer()
	}
	if i*timerHeapN+1 >= n {
		return
	}
	tw := heap[i]
	when := tw.when
	if when <= 0 {

// Package heap provides heap operations for any type that implements
// heap.Interface. A heap is a tree with the property that each node is the
// minimum-valued node in its subtree.
//
// The minimum element in the tree is the root, at index 0.
//
// A heap is a common way to implement a priority queue. To build a priority
// queue, implement the Heap interface with the (negative) priority as the

	return h.data.Peek()
}

// Pop returns the head of the heap and removes it.
func (h *Heap) Pop() (interface{}, error) {
	obj := heap.Pop(h.data)
	if obj != nil {
		if h.metricRecorder != nil {
			h.metricRecorder.Dec()
		}
		return obj, nil
	}
	return nil, fmt.Errorf("object was removed from heap data")
}

// Get returns the requested item, or sets exists=false.