go annotations 源码
golang annotations 代码
文件路径：/src/cmd/trace/annotations.go
// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"bytes"
"fmt"
"html/template"
"internal/trace"
"log"
"math"
"net/http"
"net/url"
"reflect"
"sort"
"strconv"
"strings"
"time"
)
func init() {
http.HandleFunc("/usertasks", httpUserTasks)
http.HandleFunc("/usertask", httpUserTask)
http.HandleFunc("/userregions", httpUserRegions)
http.HandleFunc("/userregion", httpUserRegion)
}
// httpUserTasks reports all tasks found in the trace.
func httpUserTasks(w http.ResponseWriter, r *http.Request) {
res, err := analyzeAnnotations()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
tasks := res.tasks
summary := make(map[string]taskStats)
for _, task := range tasks {
stats, ok := summary[task.name]
if !ok {
stats.Type = task.name
}
stats.add(task)
summary[task.name] = stats
}
// Sort tasks by type.
userTasks := make([]taskStats, 0, len(summary))
for _, stats := range summary {
userTasks = append(userTasks, stats)
}
sort.Slice(userTasks, func(i, j int) bool {
return userTasks[i].Type < userTasks[j].Type
})
// Emit table.
err = templUserTaskTypes.Execute(w, userTasks)
if err != nil {
http.Error(w, fmt.Sprintf("failed to execute template: %v", err), http.StatusInternalServerError)
return
}
}
func httpUserRegions(w http.ResponseWriter, r *http.Request) {
res, err := analyzeAnnotations()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
allRegions := res.regions
summary := make(map[regionTypeID]regionStats)
for id, regions := range allRegions {
stats, ok := summary[id]
if !ok {
stats.regionTypeID = id
}
for _, s := range regions {
stats.add(s)
}
summary[id] = stats
}
// Sort regions by pc and name
userRegions := make([]regionStats, 0, len(summary))
for _, stats := range summary {
userRegions = append(userRegions, stats)
}
sort.Slice(userRegions, func(i, j int) bool {
if userRegions[i].Type != userRegions[j].Type {
return userRegions[i].Type < userRegions[j].Type
}
return userRegions[i].Frame.PC < userRegions[j].Frame.PC
})
// Emit table.
err = templUserRegionTypes.Execute(w, userRegions)
if err != nil {
http.Error(w, fmt.Sprintf("failed to execute template: %v", err), http.StatusInternalServerError)
return
}
}
func httpUserRegion(w http.ResponseWriter, r *http.Request) {
filter, err := newRegionFilter(r)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
res, err := analyzeAnnotations()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
allRegions := res.regions
var data []regionDesc
var maxTotal int64
for id, regions := range allRegions {
for _, s := range regions {
if !filter.match(id, s) {
continue
}
data = append(data, s)
if maxTotal < s.TotalTime {
maxTotal = s.TotalTime
}
}
}
sortby := r.FormValue("sortby")
_, ok := reflect.TypeOf(regionDesc{}).FieldByNameFunc(func(s string) bool {
return s == sortby
})
if !ok {
sortby = "TotalTime"
}
sort.Slice(data, func(i, j int) bool {
ival := reflect.ValueOf(data[i]).FieldByName(sortby).Int()
jval := reflect.ValueOf(data[j]).FieldByName(sortby).Int()
return ival > jval
})
err = templUserRegionType.Execute(w, struct {
MaxTotal int64
Data []regionDesc
Name string
Filter *regionFilter
}{
MaxTotal: maxTotal,
Data: data,
Name: filter.name,
Filter: filter,
})
if err != nil {
http.Error(w, fmt.Sprintf("failed to execute template: %v", err), http.StatusInternalServerError)
return
}
}
// httpUserTask presents the details of the selected tasks.
func httpUserTask(w http.ResponseWriter, r *http.Request) {
filter, err := newTaskFilter(r)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
res, err := analyzeAnnotations()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
tasks := res.tasks
type event struct {
WhenString string
Elapsed time.Duration
Go uint64
What string
// TODO: include stack trace of creation time
}
type entry struct {
WhenString string
ID uint64
Duration time.Duration
Complete bool
Events []event
Start, End time.Duration // Time since the beginning of the trace
GCTime time.Duration
}
base := time.Duration(firstTimestamp()) * time.Nanosecond // trace start
var data []entry
for _, task := range tasks {
if !filter.match(task) {
continue
}
// merge events in the task.events and task.regions.Start
rawEvents := append([]*trace.Event{}, task.events...)
for _, s := range task.regions {
if s.Start != nil {
rawEvents = append(rawEvents, s.Start)
}
}
sort.SliceStable(rawEvents, func(i, j int) bool { return rawEvents[i].Ts < rawEvents[j].Ts })
var events []event
var last time.Duration
for i, ev := range rawEvents {
when := time.Duration(ev.Ts)*time.Nanosecond - base
elapsed := time.Duration(ev.Ts)*time.Nanosecond - last
if i == 0 {
elapsed = 0
}
what := describeEvent(ev)
if what != "" {
events = append(events, event{
WhenString: fmt.Sprintf("%2.9f", when.Seconds()),
Elapsed: elapsed,
What: what,
Go: ev.G,
})
last = time.Duration(ev.Ts) * time.Nanosecond
}
}
data = append(data, entry{
WhenString: fmt.Sprintf("%2.9fs", (time.Duration(task.firstTimestamp())*time.Nanosecond - base).Seconds()),
Duration: task.duration(),
ID: task.id,
Complete: task.complete(),
Events: events,
Start: time.Duration(task.firstTimestamp()) * time.Nanosecond,
End: time.Duration(task.endTimestamp()) * time.Nanosecond,
GCTime: task.overlappingGCDuration(res.gcEvents),
})
}
sort.Slice(data, func(i, j int) bool {
return data[i].Duration < data[j].Duration
})
// Emit table.
err = templUserTaskType.Execute(w, struct {
Name string
Entry []entry
}{
Name: filter.name,
Entry: data,
})
if err != nil {
log.Printf("failed to execute template: %v", err)
http.Error(w, fmt.Sprintf("failed to execute template: %v", err), http.StatusInternalServerError)
return
}
}
type annotationAnalysisResult struct {
tasks map[uint64]*taskDesc // tasks
regions map[regionTypeID][]regionDesc // regions
gcEvents []*trace.Event // GCStartevents, sorted
}
type regionTypeID struct {
Frame trace.Frame // top frame
Type string
}
// analyzeAnnotations analyzes user annotation events and
// returns the task descriptors keyed by internal task id.
func analyzeAnnotations() (annotationAnalysisResult, error) {
res, err := parseTrace()
if err != nil {
return annotationAnalysisResult{}, fmt.Errorf("failed to parse trace: %v", err)
}
events := res.Events
if len(events) == 0 {
return annotationAnalysisResult{}, fmt.Errorf("empty trace")
}
tasks := allTasks{}
regions := map[regionTypeID][]regionDesc{}
var gcEvents []*trace.Event
for _, ev := range events {
switch typ := ev.Type; typ {
case trace.EvUserTaskCreate, trace.EvUserTaskEnd, trace.EvUserLog:
taskid := ev.Args[0]
task := tasks.task(taskid)
task.addEvent(ev)
// retrieve parent task information
if typ == trace.EvUserTaskCreate {
if parentID := ev.Args[1]; parentID != 0 {
parentTask := tasks.task(parentID)
task.parent = parentTask
if parentTask != nil {
parentTask.children = append(parentTask.children, task)
}
}
}
case trace.EvGCStart:
gcEvents = append(gcEvents, ev)
}
}
// combine region info.
analyzeGoroutines(events)
for goid, stats := range gs {
// gs is a global var defined in goroutines.go as a result
// of analyzeGoroutines. TODO(hyangah): fix this not to depend
// on a 'global' var.
for _, s := range stats.Regions {
if s.TaskID != 0 {
task := tasks.task(s.TaskID)
task.goroutines[goid] = struct{}{}
task.regions = append(task.regions, regionDesc{UserRegionDesc: s, G: goid})
}
var frame trace.Frame
if s.Start != nil {
frame = *s.Start.Stk[0]
}
id := regionTypeID{Frame: frame, Type: s.Name}
regions[id] = append(regions[id], regionDesc{UserRegionDesc: s, G: goid})
}
}
// sort regions in tasks based on the timestamps.
for _, task := range tasks {
sort.SliceStable(task.regions, func(i, j int) bool {
si, sj := task.regions[i].firstTimestamp(), task.regions[j].firstTimestamp()
if si != sj {
return si < sj
}
return task.regions[i].lastTimestamp() < task.regions[j].lastTimestamp()
})
}
return annotationAnalysisResult{tasks: tasks, regions: regions, gcEvents: gcEvents}, nil
}
// taskDesc represents a task.
type taskDesc struct {
name string // user-provided task name
id uint64 // internal task id
events []*trace.Event // sorted based on timestamp.
regions []regionDesc // associated regions, sorted based on the start timestamp and then the last timestamp.
goroutines map[uint64]struct{} // involved goroutines
create *trace.Event // Task create event
end *trace.Event // Task end event
parent *taskDesc
children []*taskDesc
}
func newTaskDesc(id uint64) *taskDesc {
return &taskDesc{
id: id,
goroutines: make(map[uint64]struct{}),
}
}
func (task *taskDesc) String() string {
if task == nil {
return "task <nil>"
}
wb := new(bytes.Buffer)
fmt.Fprintf(wb, "task %d:\t%s\n", task.id, task.name)
fmt.Fprintf(wb, "\tstart: %v end: %v complete: %t\n", task.firstTimestamp(), task.endTimestamp(), task.complete())
fmt.Fprintf(wb, "\t%d goroutines\n", len(task.goroutines))
fmt.Fprintf(wb, "\t%d regions:\n", len(task.regions))
for _, s := range task.regions {
fmt.Fprintf(wb, "\t\t%s(goid=%d)\n", s.Name, s.G)
}
if task.parent != nil {
fmt.Fprintf(wb, "\tparent: %s\n", task.parent.name)
}
fmt.Fprintf(wb, "\t%d children:\n", len(task.children))
for _, c := range task.children {
fmt.Fprintf(wb, "\t\t%s\n", c.name)
}
return wb.String()
}
// regionDesc represents a region.
type regionDesc struct {
*trace.UserRegionDesc
G uint64 // id of goroutine where the region was defined
}
type allTasks map[uint64]*taskDesc
func (tasks allTasks) task(taskID uint64) *taskDesc {
if taskID == 0 {
return nil // notask
}
t, ok := tasks[taskID]
if ok {
return t
}
t = newTaskDesc(taskID)
tasks[taskID] = t
return t
}
func (task *taskDesc) addEvent(ev *trace.Event) {
if task == nil {
return
}
task.events = append(task.events, ev)
task.goroutines[ev.G] = struct{}{}
switch typ := ev.Type; typ {
case trace.EvUserTaskCreate:
task.name = ev.SArgs[0]
task.create = ev
case trace.EvUserTaskEnd:
task.end = ev
}
}
// complete is true only if both start and end events of this task
// are present in the trace.
func (task *taskDesc) complete() bool {
if task == nil {
return false
}
return task.create != nil && task.end != nil
}
// descendants returns all the task nodes in the subtree rooted from this task.
func (task *taskDesc) descendants() []*taskDesc {
if task == nil {
return nil
}
res := []*taskDesc{task}
for i := 0; len(res[i:]) > 0; i++ {
t := res[i]
for _, c := range t.children {
res = append(res, c)
}
}
return res
}
// firstTimestamp returns the first timestamp of this task found in
// this trace. If the trace does not contain the task creation event,
// the first timestamp of the trace will be returned.
func (task *taskDesc) firstTimestamp() int64 {
if task != nil && task.create != nil {
return task.create.Ts
}
return firstTimestamp()
}
// lastTimestamp returns the last timestamp of this task in this
// trace. If the trace does not contain the task end event, the last
// timestamp of the trace will be returned.
func (task *taskDesc) lastTimestamp() int64 {
endTs := task.endTimestamp()
if last := task.lastEvent(); last != nil && last.Ts > endTs {
return last.Ts
}
return endTs
}
// endTimestamp returns the timestamp of this task's end event.
// If the trace does not contain the task end event, the last
// timestamp of the trace will be returned.
func (task *taskDesc) endTimestamp() int64 {
if task != nil && task.end != nil {
return task.end.Ts
}
return lastTimestamp()
}
func (task *taskDesc) duration() time.Duration {
return time.Duration(task.endTimestamp()-task.firstTimestamp()) * time.Nanosecond
}
func (region *regionDesc) duration() time.Duration {
return time.Duration(region.lastTimestamp()-region.firstTimestamp()) * time.Nanosecond
}
// overlappingGCDuration returns the sum of GC period overlapping with the task's lifetime.
func (task *taskDesc) overlappingGCDuration(evs []*trace.Event) (overlapping time.Duration) {
for _, ev := range evs {
// make sure we only consider the global GC events.
if typ := ev.Type; typ != trace.EvGCStart && typ != trace.EvGCSTWStart {
continue
}
if o, overlapped := task.overlappingDuration(ev); overlapped {
overlapping += o
}
}
return overlapping
}
// overlappingInstant reports whether the instantaneous event, ev, occurred during
// any of the task's region if ev is a goroutine-local event, or overlaps with the
// task's lifetime if ev is a global event.
func (task *taskDesc) overlappingInstant(ev *trace.Event) bool {
if _, ok := isUserAnnotationEvent(ev); ok && task.id != ev.Args[0] {
return false // not this task's user event.
}
ts := ev.Ts
taskStart := task.firstTimestamp()
taskEnd := task.endTimestamp()
if ts < taskStart || taskEnd < ts {
return false
}
if ev.P == trace.GCP {
return true
}
// Goroutine local event. Check whether there are regions overlapping with the event.
goid := ev.G
for _, region := range task.regions {
if region.G != goid {
continue
}
if region.firstTimestamp() <= ts && ts <= region.lastTimestamp() {
return true
}
}
return false
}
// overlappingDuration reports whether the durational event, ev, overlaps with
// any of the task's region if ev is a goroutine-local event, or overlaps with
// the task's lifetime if ev is a global event. It returns the overlapping time
// as well.
func (task *taskDesc) overlappingDuration(ev *trace.Event) (time.Duration, bool) {
start := ev.Ts
end := lastTimestamp()
if ev.Link != nil {
end = ev.Link.Ts
}
if start > end {
return 0, false
}
goid := ev.G
goid2 := ev.G
if ev.Link != nil {
goid2 = ev.Link.G
}
// This event is a global GC event
if ev.P == trace.GCP {
taskStart := task.firstTimestamp()
taskEnd := task.endTimestamp()
o := overlappingDuration(taskStart, taskEnd, start, end)
return o, o > 0
}
// Goroutine local event. Check whether there are regions overlapping with the event.
var overlapping time.Duration
var lastRegionEnd int64 // the end of previous overlapping region
for _, region := range task.regions {
if region.G != goid && region.G != goid2 {
continue
}
regionStart, regionEnd := region.firstTimestamp(), region.lastTimestamp()
if regionStart < lastRegionEnd { // skip nested regions
continue
}
if o := overlappingDuration(regionStart, regionEnd, start, end); o > 0 {
// overlapping.
lastRegionEnd = regionEnd
overlapping += o
}
}
return overlapping, overlapping > 0
}
// overlappingDuration returns the overlapping time duration between
// two time intervals [start1, end1] and [start2, end2] where
// start, end parameters are all int64 representing nanoseconds.
func overlappingDuration(start1, end1, start2, end2 int64) time.Duration {
// assume start1 <= end1 and start2 <= end2
if end1 < start2 || end2 < start1 {
return 0
}
if start1 < start2 { // choose the later one
start1 = start2
}
if end1 > end2 { // choose the earlier one
end1 = end2
}
return time.Duration(end1 - start1)
}
func (task *taskDesc) lastEvent() *trace.Event {
if task == nil {
return nil
}
if n := len(task.events); n > 0 {
return task.events[n-1]
}
return nil
}
// firstTimestamp returns the timestamp of region start event.
// If the region's start event is not present in the trace,
// the first timestamp of the trace will be returned.
func (region *regionDesc) firstTimestamp() int64 {
if region.Start != nil {
return region.Start.Ts
}
return firstTimestamp()
}
// lastTimestamp returns the timestamp of region end event.
// If the region's end event is not present in the trace,
// the last timestamp of the trace will be returned.
func (region *regionDesc) lastTimestamp() int64 {
if region.End != nil {
return region.End.Ts
}
return lastTimestamp()
}
// RelatedGoroutines returns IDs of goroutines related to the task. A goroutine
// is related to the task if user annotation activities for the task occurred.
// If non-zero depth is provided, this searches all events with BFS and includes
// goroutines unblocked any of related goroutines to the result.
func (task *taskDesc) RelatedGoroutines(events []*trace.Event, depth int) map[uint64]bool {
start, end := task.firstTimestamp(), task.endTimestamp()
gmap := map[uint64]bool{}
for k := range task.goroutines {
gmap[k] = true
}
for i := 0; i < depth; i++ {
gmap1 := make(map[uint64]bool)
for g := range gmap {
gmap1[g] = true
}
for _, ev := range events {
if ev.Ts < start || ev.Ts > end {
continue
}
if ev.Type == trace.EvGoUnblock && gmap[ev.Args[0]] {
gmap1[ev.G] = true
}
gmap = gmap1
}
}
gmap[0] = true // for GC events (goroutine id = 0)
return gmap
}
type taskFilter struct {
name string
cond []func(*taskDesc) bool
}
func (f *taskFilter) match(t *taskDesc) bool {
if t == nil {
return false
}
for _, c := range f.cond {
if !c(t) {
return false
}
}
return true
}
func newTaskFilter(r *http.Request) (*taskFilter, error) {
if err := r.ParseForm(); err != nil {
return nil, err
}
var name []string
var conditions []func(*taskDesc) bool
param := r.Form
if typ, ok := param["type"]; ok && len(typ) > 0 {
name = append(name, "type="+typ[0])
conditions = append(conditions, func(t *taskDesc) bool {
return t.name == typ[0]
})
}
if complete := r.FormValue("complete"); complete == "1" {
name = append(name, "complete")
conditions = append(conditions, func(t *taskDesc) bool {
return t.complete()
})
} else if complete == "0" {
name = append(name, "incomplete")
conditions = append(conditions, func(t *taskDesc) bool {
return !t.complete()
})
}
if lat, err := time.ParseDuration(r.FormValue("latmin")); err == nil {
name = append(name, fmt.Sprintf("latency >= %s", lat))
conditions = append(conditions, func(t *taskDesc) bool {
return t.complete() && t.duration() >= lat
})
}
if lat, err := time.ParseDuration(r.FormValue("latmax")); err == nil {
name = append(name, fmt.Sprintf("latency <= %s", lat))
conditions = append(conditions, func(t *taskDesc) bool {
return t.complete() && t.duration() <= lat
})
}
if text := r.FormValue("logtext"); text != "" {
name = append(name, fmt.Sprintf("log contains %q", text))
conditions = append(conditions, func(t *taskDesc) bool {
return taskMatches(t, text)
})
}
return &taskFilter{name: strings.Join(name, ","), cond: conditions}, nil
}
func taskMatches(t *taskDesc, text string) bool {
for _, ev := range t.events {
switch ev.Type {
case trace.EvUserTaskCreate, trace.EvUserRegion, trace.EvUserLog:
for _, s := range ev.SArgs {
if strings.Contains(s, text) {
return true
}
}
}
}
return false
}
type regionFilter struct {
name string
params url.Values
cond []func(regionTypeID, regionDesc) bool
}
func (f *regionFilter) match(id regionTypeID, s regionDesc) bool {
for _, c := range f.cond {
if !c(id, s) {
return false
}
}
return true
}
func newRegionFilter(r *http.Request) (*regionFilter, error) {
if err := r.ParseForm(); err != nil {
return nil, err
}
var name []string
var conditions []func(regionTypeID, regionDesc) bool
filterParams := make(url.Values)
param := r.Form
if typ, ok := param["type"]; ok && len(typ) > 0 {
name = append(name, "type="+typ[0])
conditions = append(conditions, func(id regionTypeID, s regionDesc) bool {
return id.Type == typ[0]
})
filterParams.Add("type", typ[0])
}
if pc, err := strconv.ParseUint(r.FormValue("pc"), 16, 64); err == nil {
encPC := fmt.Sprintf("%x", pc)
name = append(name, "pc="+encPC)
conditions = append(conditions, func(id regionTypeID, s regionDesc) bool {
return id.Frame.PC == pc
})
filterParams.Add("pc", encPC)
}
if lat, err := time.ParseDuration(r.FormValue("latmin")); err == nil {
name = append(name, fmt.Sprintf("latency >= %s", lat))
conditions = append(conditions, func(_ regionTypeID, s regionDesc) bool {
return s.duration() >= lat
})
filterParams.Add("latmin", lat.String())
}
if lat, err := time.ParseDuration(r.FormValue("latmax")); err == nil {
name = append(name, fmt.Sprintf("latency <= %s", lat))
conditions = append(conditions, func(_ regionTypeID, s regionDesc) bool {
return s.duration() <= lat
})
filterParams.Add("latmax", lat.String())
}
return ®ionFilter{
name: strings.Join(name, ","),
cond: conditions,
params: filterParams,
}, nil
}
type durationHistogram struct {
Count int
Buckets []int
MinBucket, MaxBucket int
}
// Five buckets for every power of 10.
var logDiv = math.Log(math.Pow(10, 1.0/5))
func (h *durationHistogram) add(d time.Duration) {
var bucket int
if d > 0 {
bucket = int(math.Log(float64(d)) / logDiv)
}
if len(h.Buckets) <= bucket {
h.Buckets = append(h.Buckets, make([]int, bucket-len(h.Buckets)+1)...)
h.Buckets = h.Buckets[:cap(h.Buckets)]
}
h.Buckets[bucket]++
if bucket < h.MinBucket || h.MaxBucket == 0 {
h.MinBucket = bucket
}
if bucket > h.MaxBucket {
h.MaxBucket = bucket
}
h.Count++
}
func (h *durationHistogram) BucketMin(bucket int) time.Duration {
return time.Duration(math.Exp(float64(bucket) * logDiv))
}
func niceDuration(d time.Duration) string {
var rnd time.Duration
var unit string
switch {
case d < 10*time.Microsecond:
rnd, unit = time.Nanosecond, "ns"
case d < 10*time.Millisecond:
rnd, unit = time.Microsecond, "µs"
case d < 10*time.Second:
rnd, unit = time.Millisecond, "ms"
default:
rnd, unit = time.Second, "s "
}
return fmt.Sprintf("%d%s", d/rnd, unit)
}
func (h *durationHistogram) ToHTML(urlmaker func(min, max time.Duration) string) template.HTML {
if h == nil || h.Count == 0 {
return template.HTML("")
}
const barWidth = 400
maxCount := 0
for _, count := range h.Buckets {
if count > maxCount {
maxCount = count
}
}
w := new(bytes.Buffer)
fmt.Fprintf(w, `<table>`)
for i := h.MinBucket; i <= h.MaxBucket; i++ {
// Tick label.
if h.Buckets[i] > 0 {
fmt.Fprintf(w, `<tr><td class="histoTime" align="right"><a href=%s>%s</a></td>`, urlmaker(h.BucketMin(i), h.BucketMin(i+1)), niceDuration(h.BucketMin(i)))
} else {
fmt.Fprintf(w, `<tr><td class="histoTime" align="right">%s</td>`, niceDuration(h.BucketMin(i)))
}
// Bucket bar.
width := h.Buckets[i] * barWidth / maxCount
fmt.Fprintf(w, `<td><div style="width:%dpx;background:blue;position:relative"> </div></td>`, width)
// Bucket count.
fmt.Fprintf(w, `<td align="right"><div style="position:relative">%d</div></td>`, h.Buckets[i])
fmt.Fprintf(w, "</tr>\n")
}
// Final tick label.
fmt.Fprintf(w, `<tr><td align="right">%s</td></tr>`, niceDuration(h.BucketMin(h.MaxBucket+1)))
fmt.Fprintf(w, `</table>`)
return template.HTML(w.String())
}
func (h *durationHistogram) String() string {
const barWidth = 40
labels := []string{}
maxLabel := 0
maxCount := 0
for i := h.MinBucket; i <= h.MaxBucket; i++ {
// TODO: This formatting is pretty awful.
label := fmt.Sprintf("[%-12s%-11s)", h.BucketMin(i).String()+",", h.BucketMin(i+1))
labels = append(labels, label)
if len(label) > maxLabel {
maxLabel = len(label)
}
count := h.Buckets[i]
if count > maxCount {
maxCount = count
}
}
w := new(bytes.Buffer)
for i := h.MinBucket; i <= h.MaxBucket; i++ {
count := h.Buckets[i]
bar := count * barWidth / maxCount
fmt.Fprintf(w, "%*s %-*s %d\n", maxLabel, labels[i-h.MinBucket], barWidth, strings.Repeat("█", bar), count)
}
return w.String()
}
type regionStats struct {
regionTypeID
Histogram durationHistogram
}
func (s *regionStats) UserRegionURL() func(min, max time.Duration) string {
return func(min, max time.Duration) string {
return fmt.Sprintf("/userregion?type=%s&pc=%x&latmin=%v&latmax=%v", template.URLQueryEscaper(s.Type), s.Frame.PC, template.URLQueryEscaper(min), template.URLQueryEscaper(max))
}
}
func (s *regionStats) add(region regionDesc) {
s.Histogram.add(region.duration())
}
var templUserRegionTypes = template.Must(template.New("").Parse(`
<html>
<style type="text/css">
.histoTime {
width: 20%;
white-space:nowrap;
}
</style>
<body>
<table border="1" sortable="1">
<tr>
<th>Region type</th>
<th>Count</th>
<th>Duration distribution (complete tasks)</th>
</tr>
{{range $}}
<tr>
<td>{{.Type}}<br>{{.Frame.Fn}}<br>{{.Frame.File}}:{{.Frame.Line}}</td>
<td><a href="/userregion?type={{.Type}}&pc={{.Frame.PC | printf "%x"}}">{{.Histogram.Count}}</a></td>
<td>{{.Histogram.ToHTML (.UserRegionURL)}}</td>
</tr>
{{end}}
</table>
</body>
</html>
`))
type taskStats struct {
Type string
Count int // Complete + incomplete tasks
Histogram durationHistogram // Complete tasks only
}
func (s *taskStats) UserTaskURL(complete bool) func(min, max time.Duration) string {
return func(min, max time.Duration) string {
return fmt.Sprintf("/usertask?type=%s&complete=%v&latmin=%v&latmax=%v", template.URLQueryEscaper(s.Type), template.URLQueryEscaper(complete), template.URLQueryEscaper(min), template.URLQueryEscaper(max))
}
}
func (s *taskStats) add(task *taskDesc) {
s.Count++
if task.complete() {
s.Histogram.add(task.duration())
}
}
var templUserTaskTypes = template.Must(template.New("").Parse(`
<html>
<style type="text/css">
.histoTime {
width: 20%;
white-space:nowrap;
}
</style>
<body>
Search log text: <form action="/usertask"><input name="logtext" type="text"><input type="submit"></form><br>
<table border="1" sortable="1">
<tr>
<th>Task type</th>
<th>Count</th>
<th>Duration distribution (complete tasks)</th>
</tr>
{{range $}}
<tr>
<td>{{.Type}}</td>
<td><a href="/usertask?type={{.Type}}">{{.Count}}</a></td>
<td>{{.Histogram.ToHTML (.UserTaskURL true)}}</td>
</tr>
{{end}}
</table>
</body>
</html>
`))
var templUserTaskType = template.Must(template.New("userTask").Funcs(template.FuncMap{
"elapsed": elapsed,
"asMillisecond": asMillisecond,
"trimSpace": strings.TrimSpace,
}).Parse(`
<html>
<head> <title>User Task: {{.Name}} </title> </head>
<style type="text/css">
body {
font-family: sans-serif;
}
table#req-status td.family {
padding-right: 2em;
}
table#req-status td.active {
padding-right: 1em;
}
table#req-status td.empty {
color: #aaa;
}
table#reqs {
margin-top: 1em;
}
table#reqs tr.first {
font-weight: bold;
}
table#reqs td {
font-family: monospace;
}
table#reqs td.when {
text-align: right;
white-space: nowrap;
}
table#reqs td.elapsed {
padding: 0 0.5em;
text-align: right;
white-space: pre;
width: 10em;
}
address {
font-size: smaller;
margin-top: 5em;
}
</style>
<body>
<h2>User Task: {{.Name}}</h2>
Search log text: <form onsubmit="window.location.search+='&logtext='+window.logtextinput.value; return false">
<input name="logtext" id="logtextinput" type="text"><input type="submit">
</form><br>
<table id="reqs">
<tr><th>When</th><th>Elapsed</th><th>Goroutine ID</th><th>Events</th></tr>
{{range $el := $.Entry}}
<tr class="first">
<td class="when">{{$el.WhenString}}</td>
<td class="elapsed">{{$el.Duration}}</td>
<td></td>
<td>
<a href="/trace?focustask={{$el.ID}}#{{asMillisecond $el.Start}}:{{asMillisecond $el.End}}">Task {{$el.ID}}</a>
<a href="/trace?taskid={{$el.ID}}#{{asMillisecond $el.Start}}:{{asMillisecond $el.End}}">(goroutine view)</a>
({{if .Complete}}complete{{else}}incomplete{{end}})</td>
</tr>
{{range $el.Events}}
<tr>
<td class="when">{{.WhenString}}</td>
<td class="elapsed">{{elapsed .Elapsed}}</td>
<td class="goid">{{.Go}}</td>
<td>{{.What}}</td>
</tr>
{{end}}
<tr>
<td></td>
<td></td>
<td></td>
<td>GC:{{$el.GCTime}}</td>
{{end}}
</body>
</html>
`))
func elapsed(d time.Duration) string {
b := []byte(fmt.Sprintf("%.9f", d.Seconds()))
// For subsecond durations, blank all zeros before decimal point,
// and all zeros between the decimal point and the first non-zero digit.
if d < time.Second {
dot := bytes.IndexByte(b, '.')
for i := 0; i < dot; i++ {
b[i] = ' '
}
for i := dot + 1; i < len(b); i++ {
if b[i] == '0' {
b[i] = ' '
} else {
break
}
}
}
return string(b)
}
func asMillisecond(d time.Duration) float64 {
return float64(d.Nanoseconds()) / 1e6
}
func formatUserLog(ev *trace.Event) string {
k, v := ev.SArgs[0], ev.SArgs[1]
if k == "" {
return v
}
if v == "" {
return k
}
return fmt.Sprintf("%v=%v", k, v)
}
func describeEvent(ev *trace.Event) string {
switch ev.Type {
case trace.EvGoCreate:
goid := ev.Args[0]
return fmt.Sprintf("new goroutine %d: %s", goid, gs[goid].Name)
case trace.EvGoEnd, trace.EvGoStop:
return "goroutine stopped"
case trace.EvUserLog:
return formatUserLog(ev)
case trace.EvUserRegion:
if ev.Args[1] == 0 {
duration := "unknown"
if ev.Link != nil {
duration = (time.Duration(ev.Link.Ts-ev.Ts) * time.Nanosecond).String()
}
return fmt.Sprintf("region %s started (duration: %v)", ev.SArgs[0], duration)
}
return fmt.Sprintf("region %s ended", ev.SArgs[0])
case trace.EvUserTaskCreate:
return fmt.Sprintf("task %v (id %d, parent %d) created", ev.SArgs[0], ev.Args[0], ev.Args[1])
// TODO: add child task creation events into the parent task events
case trace.EvUserTaskEnd:
return "task end"
}
return ""
}
func isUserAnnotationEvent(ev *trace.Event) (taskID uint64, ok bool) {
switch ev.Type {
case trace.EvUserLog, trace.EvUserRegion, trace.EvUserTaskCreate, trace.EvUserTaskEnd:
return ev.Args[0], true
}
return 0, false
}
var templUserRegionType = template.Must(template.New("").Funcs(template.FuncMap{
"prettyDuration": func(nsec int64) template.HTML {
d := time.Duration(nsec) * time.Nanosecond
return template.HTML(niceDuration(d))
},
"percent": func(dividend, divisor int64) template.HTML {
if divisor == 0 {
return ""
}
return template.HTML(fmt.Sprintf("(%.1f%%)", float64(dividend)/float64(divisor)*100))
},
"barLen": func(dividend, divisor int64) template.HTML {
if divisor == 0 {
return "0"
}
return template.HTML(fmt.Sprintf("%.2f%%", float64(dividend)/float64(divisor)*100))
},
"unknownTime": func(desc regionDesc) int64 {
sum := desc.ExecTime + desc.IOTime + desc.BlockTime + desc.SyscallTime + desc.SchedWaitTime
if sum < desc.TotalTime {
return desc.TotalTime - sum
}
return 0
},
"filterParams": func(f *regionFilter) template.URL {
return template.URL(f.params.Encode())
},
}).Parse(`
<!DOCTYPE html>
<title>User Region {{.Name}}</title>
<style>
th {
background-color: #050505;
color: #fff;
}
th.total-time,
th.exec-time,
th.io-time,
th.block-time,
th.syscall-time,
th.sched-time,
th.sweep-time,
th.pause-time {
cursor: pointer;
}
table {
border-collapse: collapse;
}
.details tr:hover {
background-color: #f2f2f2;
}
.details td {
text-align: right;
border: 1px solid #000;
}
.details td.id {
text-align: left;
}
.stacked-bar-graph {
width: 300px;
height: 10px;
color: #414042;
white-space: nowrap;
font-size: 5px;
}
.stacked-bar-graph span {
display: inline-block;
width: 100%;
height: 100%;
box-sizing: border-box;
float: left;
padding: 0;
}
.unknown-time { background-color: #636363; }
.exec-time { background-color: #d7191c; }
.io-time { background-color: #fdae61; }
.block-time { background-color: #d01c8b; }
.syscall-time { background-color: #7b3294; }
.sched-time { background-color: #2c7bb6; }
</style>
<script>
function reloadTable(key, value) {
let params = new URLSearchParams(window.location.search);
params.set(key, value);
window.location.search = params.toString();
}
</script>
<h2>{{.Name}}</h2>
{{ with $p := filterParams .Filter}}
<table class="summary">
<tr><td>Network Wait Time:</td><td> <a href="/regionio?{{$p}}">graph</a><a href="/regionio?{{$p}}&raw=1" download="io.profile">(download)</a></td></tr>
<tr><td>Sync Block Time:</td><td> <a href="/regionblock?{{$p}}">graph</a><a href="/regionblock?{{$p}}&raw=1" download="block.profile">(download)</a></td></tr>
<tr><td>Blocking Syscall Time:</td><td> <a href="/regionsyscall?{{$p}}">graph</a><a href="/regionsyscall?{{$p}}&raw=1" download="syscall.profile">(download)</a></td></tr>
<tr><td>Scheduler Wait Time:</td><td> <a href="/regionsched?{{$p}}">graph</a><a href="/regionsched?{{$p}}&raw=1" download="sched.profile">(download)</a></td></tr>
</table>
{{ end }}
<p>
<table class="details">
<tr>
<th> Goroutine </th>
<th> Task </th>
<th onclick="reloadTable('sortby', 'TotalTime')" class="total-time"> Total</th>
<th></th>
<th onclick="reloadTable('sortby', 'ExecTime')" class="exec-time"> Execution</th>
<th onclick="reloadTable('sortby', 'IOTime')" class="io-time"> Network wait</th>
<th onclick="reloadTable('sortby', 'BlockTime')" class="block-time"> Sync block </th>
<th onclick="reloadTable('sortby', 'SyscallTime')" class="syscall-time"> Blocking syscall</th>
<th onclick="reloadTable('sortby', 'SchedWaitTime')" class="sched-time"> Scheduler wait</th>
<th onclick="reloadTable('sortby', 'SweepTime')" class="sweep-time"> GC sweeping</th>
<th onclick="reloadTable('sortby', 'GCTime')" class="pause-time"> GC pause</th>
</tr>
{{range .Data}}
<tr>
<td> <a href="/trace?goid={{.G}}">{{.G}}</a> </td>
<td> {{if .TaskID}}<a href="/trace?focustask={{.TaskID}}">{{.TaskID}}</a>{{end}} </td>
<td> {{prettyDuration .TotalTime}} </td>
<td>
<div class="stacked-bar-graph">
{{if unknownTime .}}<span style="width:{{barLen (unknownTime .) $.MaxTotal}}" class="unknown-time"> </span>{{end}}
{{if .ExecTime}}<span style="width:{{barLen .ExecTime $.MaxTotal}}" class="exec-time"> </span>{{end}}
{{if .IOTime}}<span style="width:{{barLen .IOTime $.MaxTotal}}" class="io-time"> </span>{{end}}
{{if .BlockTime}}<span style="width:{{barLen .BlockTime $.MaxTotal}}" class="block-time"> </span>{{end}}
{{if .SyscallTime}}<span style="width:{{barLen .SyscallTime $.MaxTotal}}" class="syscall-time"> </span>{{end}}
{{if .SchedWaitTime}}<span style="width:{{barLen .SchedWaitTime $.MaxTotal}}" class="sched-time"> </span>{{end}}
</div>
</td>
<td> {{prettyDuration .ExecTime}}</td>
<td> {{prettyDuration .IOTime}}</td>
<td> {{prettyDuration .BlockTime}}</td>
<td> {{prettyDuration .SyscallTime}}</td>
<td> {{prettyDuration .SchedWaitTime}}</td>
<td> {{prettyDuration .SweepTime}} {{percent .SweepTime .TotalTime}}</td>
<td> {{prettyDuration .GCTime}} {{percent .GCTime .TotalTime}}</td>
</tr>
{{end}}
</table>
</p>
`))
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