metricsUnlock()

	startTheWorld(stw)
}

var DoubleCheckReadMemStats = &doubleCheckReadMemStats

// ReadMemStatsSlow returns both the runtime-computed MemStats and
// MemStats accumulated by scanning the heap.
func ReadMemStatsSlow() (base, slow MemStats) {
	stw := stopTheWorld(stwForTestReadMemStatsSlow)

	// Run on the system stack to avoid stack growth allocation.
	systemstack(func() {

)

type Metrics struct {
	gc        Flags
	marks     []*mark
	curMark   *mark
	filebase  string
	pprofFile *os.File
}

type mark struct {
	name              string
	startM, endM, gcM runtime.MemStats
	startT, endT      time.Time
}

// New creates a new Metrics object.
//
// Typical usage should look like:
//
//	func main() {
//	  filename := "" // Set to enable per-phase pprof file output.

				p.Get()
			}
		}
	})
}

var globalSink any

func BenchmarkPoolSTW(b *testing.B) {
	// Take control of GC.
	defer debug.SetGCPercent(debug.SetGCPercent(-1))

	var mstats runtime.MemStats
	var pauses []uint64

	var p Pool
	for i := 0; i < b.N; i++ {
		// Put a large number of items into a pool.
		const N = 100000
		var item any = 42
		for i := 0; i < N; i++ {
			p.Put(item)
		}

			available = (limit * 9) / 10
			return
		}
	} // for all other platforms limits are based on virtual memory.

	memStats, err := mem.VirtualMemory()
	if err != nil {
		return
	}

	// A valid value is available return its 90%
	available = (memStats.Available * 9) / 10
	return
}

func (t *apiConfig) init(cfg api.Config, setDriveCounts []int, legacy bool) {
	t.mu.Lock()

		arena := mheap_.arenas[ai.l1()][ai.l2()]
		bitmap := arena.checkmarks

		if bitmap == nil {
			// Allocate bitmap on first use.
			bitmap = (*checkmarksMap)(persistentalloc(unsafe.Sizeof(*bitmap), 0, &memstats.gcMiscSys))
			if bitmap == nil {
				throw("out of memory allocating checkmarks bitmap")
			}
			arena.checkmarks = bitmap
		} else {
			// Otherwise clear the existing bitmap.
			clear(bitmap.b[:])
		}
	}

	}

	var skipRx *regexp.Regexp
	if *skip != "" {
		var err error
		skipRx, err = regexp.Compile(*skip)
		if err != nil {
			t.Fatalf("invalid argument for -skip (%v)", err)
		}
	}

	var m1 runtime.MemStats
	runtime.ReadMemStats(&m1)
	start := time.Now()

	type parseResult struct {
		filename string
		lines    uint
	}

	goroot := testenv.GOROOT(t)

	results := make(chan parseResult)
	go func() {

		}
		if trace.empty != nil {
			w.traceBuf = trace.empty
			trace.empty = w.traceBuf.link
			unlock(&trace.lock)
		} else {
			unlock(&trace.lock)
			w.traceBuf = (*traceBuf)(sysAlloc(unsafe.Sizeof(traceBuf{}), &memstats.other_sys))
			if w.traceBuf == nil {
				throw("trace: out of memory")
			}
		}
	})
	// Initialize the buffer.
	ts := traceClockNow()
	if ts <= w.traceBuf.lastTime {
		ts = w.traceBuf.lastTime + 1

		if spineLen == b.spineCap {
			// Grow the spine.
			newCap := b.spineCap * 2
			if newCap == 0 {
				newCap = spanSetInitSpineCap
			}
			newSpine := persistentalloc(newCap*goarch.PtrSize, cpu.CacheLineSize, &memstats.gcMiscSys)
			if b.spineCap != 0 {
				// Blocks are allocated off-heap, so
				// no write barriers.
				memmove(newSpine, spine.p, b.spineCap*goarch.PtrSize)
			}
			spine = spanSetSpinePointer{newSpine}

		hugeGIF.Image[i] = img
		hugeGIF.Delay[i] = 60
	}
	buf := new(bytes.Buffer)
	if err := EncodeAll(buf, hugeGIF); err != nil {
		t.Fatal("EncodeAll:", err)
	}
	s0, s1 := new(runtime.MemStats), new(runtime.MemStats)
	runtime.GC()
	defer debug.SetGCPercent(debug.SetGCPercent(5))
	runtime.ReadMemStats(s0)
	if _, err := Decode(buf); err != nil {
		t.Fatal("Decode:", err)
	}
	runtime.ReadMemStats(s1)

			continue
		}
		f.pass = &p
		phaseName = p.name
		if f.Log() {
			f.Logf("  pass %s begin\n", p.name)
		}
		// TODO: capture logging during this pass, add it to the HTML
		var mStart runtime.MemStats
		if logMemStats || p.mem {
			runtime.ReadMemStats(&mStart)
		}

		if checkEnabled && !f.scheduled {
			// Test that we don't depend on the value order, by randomizing