Golang MemProfileRecord.FreeObjects方法代碼示例

func mem_in_go(include_zero bool) runtime.MemProfileRecord {
	var p []runtime.MemProfileRecord
	n, ok := runtime.MemProfile(nil, include_zero)
	for {
		// Allocate room for a slightly bigger profile,
		// in case a few more entries have been added
		// since the call to MemProfile.
		p = make([]runtime.MemProfileRecord, n+50)
		n, ok = runtime.MemProfile(p, include_zero)
		if ok {
			p = p[0:n]
			break
		}
		// Profile grew; try again.
	}

	var total runtime.MemProfileRecord
	for i := range p {
		r := &p[i]
		total.AllocBytes += r.AllocBytes
		total.AllocObjects += r.AllocObjects
		total.FreeBytes += r.FreeBytes
		total.FreeObjects += r.FreeObjects
	}
	return total
}

func MemoryStatistics() string {
	var p []runtime.MemProfileRecord
	n, ok := runtime.MemProfile(nil, false)
	for {
		p = make([]runtime.MemProfileRecord, n+50)
		n, ok = runtime.MemProfile(p, false)
		if ok {
			p = p[0:n]
			break
		}
	}

	var total runtime.MemProfileRecord
	for i := range p {
		r := &p[i]
		total.AllocBytes += r.AllocBytes
		total.AllocObjects += r.AllocObjects
		total.FreeBytes += r.FreeBytes
		total.FreeObjects += r.FreeObjects
	}

	var m runtime.MemStats
	runtime.ReadMemStats(&m)

	return fmt.Sprintf("%d in use objects (%d in use bytes) | Alloc: %d TotalAlloc: %d",
		total.InUseObjects(), total.InUseBytes(), m.Alloc, m.TotalAlloc)
}

// writeHeap writes the current runtime heap profile to w.
func writeHeap(w io.Writer, debug int) error {
	// Find out how many records there are (MemProfile(nil, true)),
	// allocate that many records, and get the data.
	// There's a race—more records might be added between
	// the two calls—so allocate a few extra records for safety
	// and also try again if we're very unlucky.
	// The loop should only execute one iteration in the common case.
	var p []runtime.MemProfileRecord
	n, ok := runtime.MemProfile(nil, true)
	for {
		p = make([]runtime.MemProfileRecord, n+50)
		n, ok = runtime.MemProfile(p, true)
		if ok {
			p = p[0:n]
			break
		}
	}

	sort.Slice(p, func(i, j int) bool { return p[i].InUseBytes() > p[j].InUseBytes() })

	var total runtime.MemProfileRecord
	for i := range p {
		r := &p[i]
		total.AllocBytes += r.AllocBytes
		total.AllocObjects += r.AllocObjects
		total.FreeBytes += r.FreeBytes
		total.FreeObjects += r.FreeObjects
	}

	prof := &profile.Profile{
		PeriodType: &profile.ValueType{Type: "space", Unit: "bytes"},
		SampleType: []*profile.ValueType{
			{Type: "alloc_objects", Unit: "count"},
			{Type: "alloc_space", Unit: "bytes"},
			{Type: "inuse_objects", Unit: "count"},
			{Type: "inuse_space", Unit: "bytes"},
		},
		Period: int64(runtime.MemProfileRate),
	}

	locs := make(map[uint64]*(profile.Location))
	for i := range p {
		var v1, v2, v3, v4, blocksize int64
		r := &p[i]
		v1, v2 = int64(r.InUseObjects()), int64(r.InUseBytes())
		v3, v4 = int64(r.AllocObjects), int64(r.AllocBytes)
		if (v1 == 0 && v2 != 0) || (v3 == 0 && v4 != 0) {
			return fmt.Errorf("error writing memory profile: inuse object count was 0 but inuse bytes was %d", v2)
		} else {
			if v1 != 0 {
				blocksize = v2 / v1
				v1, v2 = scaleHeapSample(v1, v2, prof.Period)
			}
			if v3 != 0 {
				v3, v4 = scaleHeapSample(v3, v4, prof.Period)
			}
		}
		value := []int64{v1, v2, v3, v4}
		var sloc []*profile.Location
		for _, pc := range r.Stack() {
			addr := uint64(pc)
			addr--
			loc := locs[addr]
			if locs[addr] == nil {
				loc = &(profile.Location{
					Address: addr,
				})
				prof.Location = append(prof.Location, loc)
				locs[addr] = loc
			}
			sloc = append(sloc, loc)
		}
		prof.Sample = append(prof.Sample, &profile.Sample{
			Value:    value,
			Location: sloc,
			NumLabel: map[string][]int64{"bytes": {blocksize}},
		})
	}
	prof.RemapAll()
	protopprof.Symbolize(prof)
	return prof.Write(w)
}

// writeHeap writes the current runtime heap profile to w.
func writeHeap(w io.Writer, debug int) error {
	// Find out how many records there are (MemProfile(nil, true)),
	// allocate that many records, and get the data.
	// There's a race—more records might be added between
	// the two calls—so allocate a few extra records for safety
	// and also try again if we're very unlucky.
	// The loop should only execute one iteration in the common case.
	var p []runtime.MemProfileRecord
	n, ok := runtime.MemProfile(nil, true)
	for {
		// Allocate room for a slightly bigger profile,
		// in case a few more entries have been added
		// since the call to MemProfile.
		p = make([]runtime.MemProfileRecord, n+50)
		n, ok = runtime.MemProfile(p, true)
		if ok {
			p = p[0:n]
			break
		}
		// Profile grew; try again.
	}

	sort.Sort(byInUseBytes(p))

	b := bufio.NewWriter(w)
	var tw *tabwriter.Writer
	w = b
	if debug > 0 {
		tw = tabwriter.NewWriter(w, 1, 8, 1, '\t', 0)
		w = tw
	}

	var total runtime.MemProfileRecord
	for i := range p {
		r := &p[i]
		total.AllocBytes += r.AllocBytes
		total.AllocObjects += r.AllocObjects
		total.FreeBytes += r.FreeBytes
		total.FreeObjects += r.FreeObjects
	}

	// Technically the rate is MemProfileRate not 2*MemProfileRate,
	// but early versions of the C++ heap profiler reported 2*MemProfileRate,
	// so that's what pprof has come to expect.
	fmt.Fprintf(w, "heap profile: %d: %d [%d: %d] @ heap/%d\n",
		total.InUseObjects(), total.InUseBytes(),
		total.AllocObjects, total.AllocBytes,
		2*runtime.MemProfileRate)

	for i := range p {
		r := &p[i]
		fmt.Fprintf(w, "%d: %d [%d: %d] @",
			r.InUseObjects(), r.InUseBytes(),
			r.AllocObjects, r.AllocBytes)
		for _, pc := range r.Stack() {
			fmt.Fprintf(w, " %#x", pc)
		}
		fmt.Fprintf(w, "\n")
		if debug > 0 {
			printStackRecord(w, r.Stack(), false)
		}
	}

	// Print memstats information too.
	// Pprof will ignore, but useful for people
	s := new(runtime.MemStats)
	runtime.ReadMemStats(s)
	fmt.Fprintf(w, "\n# runtime.MemStats\n")
	fmt.Fprintf(w, "# Alloc = %d\n", s.Alloc)
	fmt.Fprintf(w, "# TotalAlloc = %d\n", s.TotalAlloc)
	fmt.Fprintf(w, "# Sys = %d\n", s.Sys)
	fmt.Fprintf(w, "# Lookups = %d\n", s.Lookups)
	fmt.Fprintf(w, "# Mallocs = %d\n", s.Mallocs)
	fmt.Fprintf(w, "# Frees = %d\n", s.Frees)

	fmt.Fprintf(w, "# HeapAlloc = %d\n", s.HeapAlloc)
	fmt.Fprintf(w, "# HeapSys = %d\n", s.HeapSys)
	fmt.Fprintf(w, "# HeapIdle = %d\n", s.HeapIdle)
	fmt.Fprintf(w, "# HeapInuse = %d\n", s.HeapInuse)
	fmt.Fprintf(w, "# HeapReleased = %d\n", s.HeapReleased)
	fmt.Fprintf(w, "# HeapObjects = %d\n", s.HeapObjects)

	fmt.Fprintf(w, "# Stack = %d / %d\n", s.StackInuse, s.StackSys)
	fmt.Fprintf(w, "# MSpan = %d / %d\n", s.MSpanInuse, s.MSpanSys)
	fmt.Fprintf(w, "# MCache = %d / %d\n", s.MCacheInuse, s.MCacheSys)
	fmt.Fprintf(w, "# BuckHashSys = %d\n", s.BuckHashSys)

	fmt.Fprintf(w, "# NextGC = %d\n", s.NextGC)
	fmt.Fprintf(w, "# PauseNs = %d\n", s.PauseNs)
	fmt.Fprintf(w, "# NumGC = %d\n", s.NumGC)
	fmt.Fprintf(w, "# EnableGC = %v\n", s.EnableGC)
	fmt.Fprintf(w, "# DebugGC = %v\n", s.DebugGC)

	if tw != nil {
		tw.Flush()
	}
	return b.Flush()
}

// Based on: https://github.com/golang/go/blob/6b8762104a90c93ebd51149e7a031738832c5cdc/src/runtime/pprof/pprof.go#L387
func Heap(w io.Writer, sortorder string) {
	var p []runtime.MemProfileRecord
	n, ok := runtime.MemProfile(nil, true)
	for {
		// Allocate room for a slightly bigger profile,
		// in case a few more entries have been added
		// since the call to MemProfile.
		p = make([]runtime.MemProfileRecord, n+50)
		n, ok = runtime.MemProfile(p, true)
		if ok {
			p = p[0:n]
			break
		}
		// Profile grew; try again.
	}

	pm := make(map[uintptr]runtime.MemProfileRecord, len(p))

	for _, r := range p {
		// Based on: https://github.com/golang/go/blob/f9ed2f75c43cb8745a1593ec3e4208c46419216a/src/runtime/mprof.go#L150
		var h uintptr
		for _, pc := range r.Stack0 {
			h += pc
			h += h << 10
			h ^= h >> 6
		}
		h += h << 3
		h ^= h >> 11

		if _, ok := pm[h]; ok {
			r.AllocBytes += pm[h].AllocBytes
			r.FreeBytes += pm[h].FreeBytes
			r.AllocObjects += pm[h].AllocObjects
			r.FreeObjects += pm[h].FreeObjects
		}
		pm[h] = r
	}

	p = make([]runtime.MemProfileRecord, 0, len(pm))

	for _, r := range pm {
		p = append(p, r)
	}

	switch string(sortorder) {
	default:
		sort.Sort(byInUseBytes(p))
	case "allocbytes":
		sort.Sort(byAllocBytes(p))
	case "allocobjects":
		sort.Sort(byAllocObjects(p))
	case "inuseobjects":
		sort.Sort(byInUseObjects(p))
	}

	tw := tabwriter.NewWriter(w, 1, 8, 1, '\t', 0)

	var total runtime.MemProfileRecord
	for _, r := range p {
		total.AllocBytes += r.AllocBytes
		total.AllocObjects += r.AllocObjects
		total.FreeBytes += r.FreeBytes
		total.FreeObjects += r.FreeObjects
	}

	// Technically the rate is MemProfileRate not 2*MemProfileRate,
	// but early versions of the C++ heap profiler reported 2*MemProfileRate,
	// so that's what pprof has come to expect.
	fmt.Fprintf(tw, "heap profile: %d: %d [%d: %d] @ heap/%d\n",
		total.InUseObjects(), total.InUseBytes(),
		total.AllocObjects, total.AllocBytes,
		2*runtime.MemProfileRate)

	fmt.Fprintf(tw, "# heap profile: %d: %s [%d: %s] @ heap/%d\n\n",
		total.InUseObjects(), formatSize(total.InUseBytes()),
		total.AllocObjects, formatSize(total.AllocBytes),
		2*runtime.MemProfileRate)

	for _, r := range p {
		fmt.Fprintf(tw, "%d: %d [%d: %d] @",
			r.InUseObjects(), r.InUseBytes(),
			r.AllocObjects, r.AllocBytes)
		for _, pc := range r.Stack() {
			fmt.Fprintf(tw, " %#x", pc)
		}
		fmt.Fprintf(tw, "\n# %d: %s [%d: %s]\n",
			r.InUseObjects(), formatSize(r.InUseBytes()),
			r.AllocObjects, formatSize(r.AllocBytes))
		printStackRecord(tw, r.Stack(), false)
	}

	// Print memstats information too.
	// Pprof will ignore, but useful for people
	s := new(runtime.MemStats)
	runtime.ReadMemStats(s)

	// Sort pauseNs in newer first,
	// and make it a nice to print duration.
	pauseNs := make([]time.Duration, 0, len(s.PauseNs))
//.........這裏部分代碼省略.........

// writeHeap 將當前運行時堆的分析報告寫入到 w 中。
func writeHeap(w io.Writer, debug int) error {
	// Find out how many records there are (MemProfile(nil, true)),
	// allocate that many records, and get the data.
	// There's a race—more records might be added between
	// the two calls—so allocate a few extra records for safety
	// and also try again if we're very unlucky.
	// The loop should only execute one iteration in the common case.
	// 找出這裏有多少記錄（MemProfile(nil, true)），為它們分配一些記錄，並獲取數據。
	// 這裏有個競爭——在兩次調用之間可能會添加更多記錄——因此為安全起見，
	// 我們分配了額外的記錄，如果不走運的話可以再試一次。
	// 此循環在一般情況下應當隻執行一次迭代。
	var p []runtime.MemProfileRecord
	n, ok := runtime.MemProfile(nil, true)
	for {
		// Allocate room for a slightly bigger profile,
		// in case a few more entries have been added
		// since the call to MemProfile.
		// 為稍大一點的分析報告分配空間，以防調用 MemProfile 時增加更多條目。
		p = make([]runtime.MemProfileRecord, n+50)
		n, ok = runtime.MemProfile(p, true)
		if ok {
			p = p[0:n]
			break
		}
		// Profile grew; try again.
		// 分析報告增加，然後重試。
	}

	sort.Sort(byInUseBytes(p))

	b := bufio.NewWriter(w)
	var tw *tabwriter.Writer
	w = b
	if debug > 0 {
		tw = tabwriter.NewWriter(w, 1, 8, 1, '\t', 0)
		w = tw
	}

	var total runtime.MemProfileRecord
	for i := range p {
		r := &p[i]
		total.AllocBytes += r.AllocBytes
		total.AllocObjects += r.AllocObjects
		total.FreeBytes += r.FreeBytes
		total.FreeObjects += r.FreeObjects
	}

	// Technically the rate is MemProfileRate not 2*MemProfileRate,
	// but early versions of the C++ heap profiler reported 2*MemProfileRate,
	// so that's what pprof has come to expect.
	// 技術上速率應為 MemProfileRate 而非 2*MemProfileRate，但早期版本的 C++
	// 堆分析器會報告2*MemProfileRate，所以這就是pprof必須這樣預期的原因。
	fmt.Fprintf(w, "heap profile: %d: %d [%d: %d] @ heap/%d\n",
		total.InUseObjects(), total.InUseBytes(),
		total.AllocObjects, total.AllocBytes,
		2*runtime.MemProfileRate)

	for i := range p {
		r := &p[i]
		fmt.Fprintf(w, "%d: %d [%d: %d] @",
			r.InUseObjects(), r.InUseBytes(),
			r.AllocObjects, r.AllocBytes)
		for _, pc := range r.Stack() {
			fmt.Fprintf(w, " %#x", pc)
		}
		fmt.Fprintf(w, "\n")
		if debug > 0 {
			printStackRecord(w, r.Stack(), false)
		}
	}

	// Print memstats information too.
	// Pprof will ignore, but useful for people
	// 打印 memstats 信息。pprof 會忽略它，但這對人有用。
	s := new(runtime.MemStats)
	runtime.ReadMemStats(s)
	fmt.Fprintf(w, "\n# runtime.MemStats\n")
	fmt.Fprintf(w, "# Alloc = %d\n", s.Alloc)
	fmt.Fprintf(w, "# TotalAlloc = %d\n", s.TotalAlloc)
	fmt.Fprintf(w, "# Sys = %d\n", s.Sys)
	fmt.Fprintf(w, "# Lookups = %d\n", s.Lookups)
	fmt.Fprintf(w, "# Mallocs = %d\n", s.Mallocs)
	fmt.Fprintf(w, "# Frees = %d\n", s.Frees)

	fmt.Fprintf(w, "# HeapAlloc = %d\n", s.HeapAlloc)
	fmt.Fprintf(w, "# HeapSys = %d\n", s.HeapSys)
	fmt.Fprintf(w, "# HeapIdle = %d\n", s.HeapIdle)
	fmt.Fprintf(w, "# HeapInuse = %d\n", s.HeapInuse)
	fmt.Fprintf(w, "# HeapReleased = %d\n", s.HeapReleased)
	fmt.Fprintf(w, "# HeapObjects = %d\n", s.HeapObjects)

	fmt.Fprintf(w, "# Stack = %d / %d\n", s.StackInuse, s.StackSys)
	fmt.Fprintf(w, "# MSpan = %d / %d\n", s.MSpanInuse, s.MSpanSys)
	fmt.Fprintf(w, "# MCache = %d / %d\n", s.MCacheInuse, s.MCacheSys)
	fmt.Fprintf(w, "# BuckHashSys = %d\n", s.BuckHashSys)

	fmt.Fprintf(w, "# NextGC = %d\n", s.NextGC)
	fmt.Fprintf(w, "# PauseNs = %d\n", s.PauseNs)
	fmt.Fprintf(w, "# NumGC = %d\n", s.NumGC)
//.........這裏部分代碼省略.........