1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
// Copyright 2014 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 trace
// GDesc contains statistics about execution of a single goroutine.
type GDesc struct {
ID uint64
Name string
PC uint64
CreationTime int64
StartTime int64
EndTime int64
ExecTime int64
SchedWaitTime int64
IOTime int64
BlockTime int64
SyscallTime int64
GCTime int64
SweepTime int64
TotalTime int64
*gdesc // private part
}
// gdesc is a private part of GDesc that is required only during analysis.
type gdesc struct {
lastStartTime int64
blockNetTime int64
blockSyncTime int64
blockSyscallTime int64
blockSweepTime int64
blockGCTime int64
blockSchedTime int64
}
// GoroutineStats generates statistics for all goroutines in the trace.
func GoroutineStats(events []*Event) map[uint64]*GDesc {
gs := make(map[uint64]*GDesc)
var lastTs int64
var gcStartTime int64
for _, ev := range events {
lastTs = ev.Ts
switch ev.Type {
case EvGoCreate:
g := &GDesc{ID: ev.Args[0], CreationTime: ev.Ts, gdesc: new(gdesc)}
g.blockSchedTime = ev.Ts
gs[g.ID] = g
case EvGoStart:
g := gs[ev.G]
if g.PC == 0 {
g.PC = ev.Stk[0].PC
g.Name = ev.Stk[0].Fn
}
g.lastStartTime = ev.Ts
if g.StartTime == 0 {
g.StartTime = ev.Ts
}
if g.blockSchedTime != 0 {
g.SchedWaitTime += ev.Ts - g.blockSchedTime
g.blockSchedTime = 0
}
case EvGoEnd, EvGoStop:
g := gs[ev.G]
g.ExecTime += ev.Ts - g.lastStartTime
g.TotalTime = ev.Ts - g.CreationTime
g.EndTime = ev.Ts
case EvGoBlockSend, EvGoBlockRecv, EvGoBlockSelect,
EvGoBlockSync, EvGoBlockCond:
g := gs[ev.G]
g.ExecTime += ev.Ts - g.lastStartTime
g.blockSyncTime = ev.Ts
case EvGoSched, EvGoPreempt:
g := gs[ev.G]
g.ExecTime += ev.Ts - g.lastStartTime
g.blockSchedTime = ev.Ts
case EvGoSleep, EvGoBlock:
g := gs[ev.G]
g.ExecTime += ev.Ts - g.lastStartTime
case EvGoBlockNet:
g := gs[ev.G]
g.ExecTime += ev.Ts - g.lastStartTime
g.blockNetTime = ev.Ts
case EvGoUnblock:
g := gs[ev.Args[0]]
if g.blockNetTime != 0 {
g.IOTime += ev.Ts - g.blockNetTime
g.blockNetTime = 0
}
if g.blockSyncTime != 0 {
g.BlockTime += ev.Ts - g.blockSyncTime
g.blockSyncTime = 0
}
g.blockSchedTime = ev.Ts
case EvGoSysBlock:
g := gs[ev.G]
g.ExecTime += ev.Ts - g.lastStartTime
g.blockSyscallTime = ev.Ts
case EvGoSysExit:
g := gs[ev.G]
if g.blockSyscallTime != 0 {
g.SyscallTime += ev.Ts - g.blockSyscallTime
g.blockSyscallTime = 0
}
g.blockSchedTime = ev.Ts
case EvGCSweepStart:
g := gs[ev.G]
if g != nil {
// Sweep can happen during GC on system goroutine.
g.blockSweepTime = ev.Ts
}
case EvGCSweepDone:
g := gs[ev.G]
if g != nil && g.blockSweepTime != 0 {
g.SweepTime += ev.Ts - g.blockSweepTime
g.blockSweepTime = 0
}
case EvGCStart:
gcStartTime = ev.Ts
case EvGCDone:
for _, g := range gs {
if g.EndTime == 0 {
g.GCTime += ev.Ts - gcStartTime
}
}
}
}
for _, g := range gs {
if g.TotalTime == 0 {
g.TotalTime = lastTs - g.CreationTime
}
if g.EndTime == 0 {
g.EndTime = lastTs
}
if g.blockNetTime != 0 {
g.IOTime += lastTs - g.blockNetTime
g.blockNetTime = 0
}
if g.blockSyncTime != 0 {
g.BlockTime += lastTs - g.blockSyncTime
g.blockSyncTime = 0
}
if g.blockSyscallTime != 0 {
g.SyscallTime += lastTs - g.blockSyscallTime
g.blockSyscallTime = 0
}
if g.blockSchedTime != 0 {
g.SchedWaitTime += lastTs - g.blockSchedTime
g.blockSchedTime = 0
}
g.gdesc = nil
}
return gs
}
// RelatedGoroutines finds a set of goroutines related to goroutine goid.
func RelatedGoroutines(events []*Event, goid uint64) map[uint64]bool {
// BFS of depth 2 over "unblock" edges
// (what goroutines unblock goroutine goid?).
gmap := make(map[uint64]bool)
gmap[goid] = true
for i := 0; i < 2; i++ {
gmap1 := make(map[uint64]bool)
for g := range gmap {
gmap1[g] = true
}
for _, ev := range events {
if ev.Type == EvGoUnblock && gmap[ev.Args[0]] {
gmap1[ev.G] = true
}
}
gmap = gmap1
}
gmap[0] = true // for GC events
return gmap
}
|
