golang pprof

0.flat/cum含義

針對CPU：
Total：總共采樣次數，這里是2525次。
Flat：函數在樣本中處于運行狀態的次數。簡單來說就是函數出現在棧頂的次數，而函數在棧頂則意味著它在使用CPU。
Flat%：Flat / Total。
Sum%：自己以及所有前面的Flat%的累積值。解讀方式：表中第3行Sum% 32.4%，意思是前3個函數（運行狀態）的計數占了總樣本數的32.4%
Cum：函數在樣本中出現的次數。只要這個函數出現在棧中那么就算進去，這個和Flat不同（必須是棧頂才能算進去）。也可以解讀為這個函數的調用次數。
Cum%：Cum / Total

針對內存：
Total：總共占用內存
Flat：函數分配的內存，不包含它調用其他函數造成的內存分配。
Flat%：Flat / Total
Sum%：自己和前面所有的Flat%累積值
Cum：這個函數分配的內存，以及它調用其他函數分配的內存之和。可以解讀為因為這個函數所造成的所有內存分配。
Cum%：Cum / Total

1.排查CPU問題

go tool pprof http://localhost:6060/debug/pprof/profile

[root@br-apm-001 bonree]# go tool pprof http://localhost:6060/debug/pprof/profile
Fetching profile over HTTP from http://localhost:6060/debug/pprof/profile

Saved profile in /root/pprof/pprof.pprof-amd64-linux.samples.cpu.001.pb.gz
File: pprof-amd64-linux
Type: cpu
Time: Jul 27, 2023 at 8:22pm (CST)
Duration: 30.11s, Total samples = 22.09s (73.36%)
Entering interactive mode (type "help" for commands, "o" for options)
(pprof) top
Showing nodes accounting for 22.08s, 100% of 22.09s total
Dropped 10 nodes (cum <= 0.11s)
Showing top 10 nodes out of 13
      flat  flat%   sum%        cum   cum%
    13.37s 60.53% 60.53%     13.56s 61.39%  github.com/wolfogre/go-pprof-practice/animal/felidae/tiger.(*Tiger).Eat
     5.64s 25.53% 86.06%      5.64s 25.53%  runtime.memmove
     2.70s 12.22% 98.28%      2.70s 12.22%  runtime.memclrNoHeapPointers
     0.19s  0.86% 99.14%      0.19s  0.86%  runtime.asyncPreempt
     0.16s  0.72% 99.86%      0.16s  0.72%  runtime.writeHeapBits.flush
     0.02s 0.091%   100%      8.51s 38.52%  github.com/wolfogre/go-pprof-practice/animal/muridae/mouse.(*Mouse).Pee.func1
         0     0%   100%     13.56s 61.39%  github.com/wolfogre/go-pprof-practice/animal/felidae/tiger.(*Tiger).Live
         0     0%   100%     13.58s 61.48%  main.main
         0     0%   100%      0.17s  0.77%  runtime.(*mcache).allocLarge
         0     0%   100%      0.16s  0.72%  runtime.(*mspan).initHeapBits
(pprof) list Eat
Total: 22.09s
ROUTINE ======================== github.com/wolfogre/go-pprof-practice/animal/felidae/tiger.(*Tiger).Eat in E:/source/go/workspace/go-pprof-practice-master/animal/felidae/tiger/tiger.go
    13.37s     13.56s (flat, cum) 61.39% of Total
 Error: could not find file E:/source/go/workspace/go-pprof-practice-master/animal/felidae/tiger/tiger.go on path /home/bonree
(pprof)

具體看看tiger.go的Eat方法，注釋掉：

func (t *Tiger) Eat() {
    log.Println(t.Name(), "eat")
    loop := 10000000000
    for i := 0; i < loop; i++ {
        // do nothing
    }
}

2.排查內存

go tool pprof http://localhost:6060/debug/pprof/heap

(pprof) top
Showing nodes accounting for 4.55s, 99.56% of 4.57s total
Dropped 2 nodes (cum <= 0.02s)
Showing top 10 nodes out of 26
      flat  flat%   sum%        cum   cum%
     2.98s 65.21% 65.21%      2.98s 65.21%  runtime.memmove
     1.28s 28.01% 93.22%      1.28s 28.01%  runtime.memclrNoHeapPointers
     0.13s  2.84% 96.06%      4.36s 95.40%  github.com/wolfogre/go-pprof-practice/animal/muridae/mouse.(*Mouse).Steal
     0.08s  1.75% 97.81%      0.08s  1.75%  runtime.writeHeapBits.flush
     0.06s  1.31% 99.12%      0.06s  1.31%  runtime.madvise
     0.01s  0.22% 99.34%      0.06s  1.31%  github.com/wolfogre/go-pprof-practice/animal/muridae/mouse.(*Mouse).Pee.func1
     0.01s  0.22% 99.56%      0.08s  1.75%  runtime.(*scavengerState).run
         0     0% 99.56%      0.07s  1.53%  github.com/wolfogre/go-pprof-practice/animal/canidae/dog.(*Dog).Live
         0     0% 99.56%      0.07s  1.53%  github.com/wolfogre/go-pprof-practice/animal/canidae/dog.(*Dog).Run (inline)
         0     0% 99.56%      4.36s 95.40%  github.com/wolfogre/go-pprof-practice/animal/muridae/mouse.(*Mouse).Live
(pprof) list Steal 
Total: 4.57s
ROUTINE ======================== github.com/wolfogre/go-pprof-practice/animal/muridae/mouse.(*Mouse).Steal in E:/source/go/workspace/go-pprof-practice-master/animal/muridae/mouse/mouse.go
     130ms      4.36s (flat, cum) 95.40% of Total
 Error: could not find file E:/source/go/workspace/go-pprof-practice-master/animal/muridae/mouse/mouse.go on path /home/bonree
(pprof)

func (m *Mouse) Steal() {
    log.Println(m.Name(), "steal")
    max := constant.Gi
    for len(m.buffer)*constant.Mi < max {
        m.buffer = append(m.buffer, [constant.Mi]byte{})
    }
}

3.排查排查頻繁內存回收

GODEBUG=gctrace=1 ./pprof-amd64-linux | grep gc
go tool pprof http://localhost:6060/debug/pprof/allocs

[root@br-apm-001 bonree]# GODEBUG=gctrace=1 ./pprof-amd64-linux | grep gc
gc 1 @0.007s 2%: 0.017+1.0+0.006 ms clock, 0.017+0.36/0.24/0+0.006 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 2 @3.042s 0%: 0.062+1.1+0.005 ms clock, 0.062+0.32/0.26/0+0.005 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 3 @6.076s 0%: 0.088+1.0+0.005 ms clock, 0.088+0.39/0.28/0+0.005 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 4 @9.126s 0%: 0.12+1.1+0.005 ms clock, 0.12+0.20/0.39/0+0.005 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 5 @12.158s 0%: 0.10+1.0+0.006 ms clock, 0.10+0.32/0.30/0+0.006 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 6 @15.202s 0%: 0.076+0.91+0.005 ms clock, 0.076+0.18/0.33/0+0.005 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 7 @18.223s 0%: 0.065+0.96+0.005 ms clock, 0.065+0.29/0.30/0+0.005 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 8 @21.247s 0%: 0.066+1.0+0.005 ms clock, 0.066+0.36/0.31/0+0.005 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 9 @24.270s 0%: 0.064+1.0+0.004 ms clock, 0.064+0.37/0.32/0+0.004 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 10 @27.298s 0%: 0.077+1.3+0.004 ms clock, 0.077+0.43/0.38/0+0.004 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 11 @30.320s 0%: 0.062+0.93+0.005 ms clock, 0.062+0.42/0.28/0+0.005 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 12 @33.019s 0%: 0.054+7.1+0.008 ms clock, 0.054+0/0.85/0+0.008 ms cpu, 7->7->6 MB, 7 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 13 @33.356s 0%: 0.092+1.4+0.005 ms clock, 0.092+0.82/0.43/0+0.005 ms cpu, 22->22->4 MB, 22 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 14 @34.028s 0%: 0.055+20+0.007 ms clock, 0.055+0/1.1/0+0.007 ms cpu, 12->12->12 MB, 12 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 15 @35.548s 0%: 0.057+44+0.008 ms clock, 0.057+0/1.0/0+0.008 ms cpu, 28->28->24 MB, 28 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 16 @37.599s 0%: 0.059+67+0.007 ms clock, 0.059+0/0.77/0+0.007 ms cpu, 72->72->48 MB, 72 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 17 @40.179s 0%: 0.089+175+0.007 ms clock, 0.089+0/0.70/0+0.007 ms cpu, 128->128->96 MB, 128 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 18 @44.369s 0%: 0.064+296+0.008 ms clock, 0.064+0/0.77/0+0.008 ms cpu, 240->240->192 MB, 240 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 19 @50.199s 0%: 0.060+642+0.007 ms clock, 0.060+0/0.83/0+0.007 ms cpu, 480->480->384 MB, 480 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 20 @58.815s 0%: 0.099+1373+0.007 ms clock, 0.099+0/1.2/0+0.007 ms cpu, 1456->1456->1280 MB, 1456 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 21 @72.880s 0%: 0.17+2.3+0.008 ms clock, 0.17+1.9/0/0+0.008 ms cpu, 12976->12976->12160 MB, 12976 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 22 @133.637s 0%: 0.085+5.5+0.009 ms clock, 0.085+5.0/0.44/0+0.009 ms cpu, 31921->31921->20544 MB, 31921 MB goal, 0 MB stacks, 0 MB globals, 1 P

[root@br-apm-001 prometheus-2.40.1.linux-amd64]# go tool pprof http://localhost:6060/debug/pprof/allocs
Fetching profile over HTTP from http://localhost:6060/debug/pprof/allocs
Saved profile in /root/pprof/pprof.pprof-amd64-linux.alloc_objects.alloc_space.inuse_objects.inuse_space.001.pb.gz
File: pprof-amd64-linux
Type: alloc_space
Time: Jul 28, 2023 at 9:05am (CST)
Entering interactive mode (type "help" for commands, "o" for options)
(pprof) top
Showing nodes accounting for 1855.20MB, 99.95% of 1856.20MB total
Dropped 5 nodes (cum <= 9.28MB)
      flat  flat%   sum%        cum   cum%
 1535.20MB 82.71% 82.71%  1535.20MB 82.71%  github.com/wolfogre/go-pprof-practice/animal/muridae/mouse.(*Mouse).Pee.func1
     320MB 17.24% 99.95%      320MB 17.24%  github.com/wolfogre/go-pprof-practice/animal/canidae/dog.(*Dog).Run (inline)
         0     0% 99.95%   320.50MB 17.27%  github.com/wolfogre/go-pprof-practice/animal/canidae/dog.(*Dog).Live
         0     0% 99.95%      321MB 17.29%  main.main
         0     0% 99.95%      321MB 17.29%  runtime.main
(pprof) list func1
Total: 1.81GB
ROUTINE ======================== github.com/wolfogre/go-pprof-practice/animal/muridae/mouse.(*Mouse).Pee.func1 in E:/source/go/workspace/go-pprof-practice-master/animal/muridae/mouse/mouse.go
    1.50GB     1.50GB (flat, cum) 82.71% of Total
 Error: could not find file E:/source/go/workspace/go-pprof-practice-master/animal/muridae/mouse/mouse.go on path /data/br/base/prometheus-2.40.1.linux-amd64
(pprof)

func (m *Mouse) Pee() {
    log.Println(m.Name(), "pee")
    go func() {
        time.Sleep(time.Second * 30)
        max := constant.Gi
        for len(m.slowBuffer)*constant.Mi < max {
            m.slowBuffer = append(m.slowBuffer, [constant.Mi]byte{})
            time.Sleep(time.Millisecond * 500)
        }
    }()
}

gc 130 @390.748s 0%: 0.090+1.0+0.005 ms clock, 0.090+0.44/0.30/0+0.005 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 131 @393.771s 0%: 0.094+1.0+0.004 ms clock, 0.094+0.38/0.28/0+0.004 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 132 @396.795s 0%: 0.12+0.82+0.004 ms clock, 0.12+0.33/0.26/0+0.004 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 133 @399.827s 0%: 0.064+0.97+0.004 ms clock, 0.064+0.33/0.29/0+0.004 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 134 @402.851s 0%: 0.066+0.83+0.004 ms clock, 0.066+0.38/0.24/0+0.004 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 135 @405.881s 0%: 0.10+1.5+0.004 ms clock, 0.10+0.36/0.44/0+0.004 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 136 @408.904s 0%: 0.084+1.1+0.005 ms clock, 0.084+0.42/0.31/0+0.005 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 137 @411.926s 0%: 0.085+1.0+0.004 ms clock, 0.085+0.36/0.33/0+0.004 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 138 @414.958s 0%: 0.087+1.1+0.022 ms clock, 0.087+0.56/0.28/0+0.022 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 139 @417.984s 0%: 0.14+1.1+0.005 ms clock, 0.14+0.40/0.37/0+0.005 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 140 @421.015s 0%: 0.10+0.88+0.004 ms clock, 0.10+0.41/0.26/0+0.004 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 141 @424.036s 0%: 0.066+1.0+0.004 ms clock, 0.066+0.40/0.28/0+0.004 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 142 @427.059s 0%: 0.094+1.0+0.004 ms clock, 0.094+0.50/0.34/0+0.004 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 143 @430.078s 0%: 0.12+1.4+0.005 ms clock, 0.12+0.38/0.39/0+0.005 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 144 @433.099s 0%: 0.092+0.88+0.004 ms clock, 0.092+0.40/0.25/0+0.004 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 145 @436.125s 0%: 0.083+1.2+0.004 ms clock, 0.083+0.55/0.36/0+0.004 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 146 @439.155s 0%: 0.13+1.3+0.005 ms clock, 0.13+0.72/0.36/0+0.005 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P
gc 147 @442.170s 0%: 0.092+1.1+0.004 ms clock, 0.092+0.43/0.36/0+0.004 ms cpu, 16->16->0 MB, 16 MB goal, 0 MB stacks, 0 MB globals, 1 P

[root@br-apm-001 prometheus-2.40.1.linux-amd64]# go tool pprof http://localhost:6060/debug/pprof/allocs
Fetching profile over HTTP from http://localhost:6060/debug/pprof/allocs
Saved profile in /root/pprof/pprof.pprof-amd64-linux.alloc_objects.alloc_space.inuse_objects.inuse_space.002.pb.gz
File: pprof-amd64-linux
Type: alloc_space
Time: Jul 28, 2023 at 9:17am (CST)
Entering interactive mode (type "help" for commands, "o" for options)
(pprof) top
Showing nodes accounting for 2.42GB, 100% of 2.42GB total
Dropped 7 nodes (cum <= 0.01GB)
      flat  flat%   sum%        cum   cum%
    2.42GB   100%   100%     2.42GB   100%  github.com/wolfogre/go-pprof-practice/animal/canidae/dog.(*Dog).Run (inline)
         0     0%   100%     2.42GB   100%  github.com/wolfogre/go-pprof-practice/animal/canidae/dog.(*Dog).Live
         0     0%   100%     2.42GB   100%  main.main
         0     0%   100%     2.42GB   100%  runtime.main
(pprof) list Run
Total: 2.42GB
ROUTINE ======================== github.com/wolfogre/go-pprof-practice/animal/canidae/dog.(*Dog).Run in E:/source/go/workspace/go-pprof-practice-master/animal/canidae/dog/dog.go
    2.42GB     2.42GB (flat, cum)   100% of Total
 Error: could not find file E:/source/go/workspace/go-pprof-practice-master/animal/canidae/dog/dog.go on path /data/br/base/prometheus-2.40.1.linux-amd64
(pprof)

func (d *Dog) Run() {
    log.Println(d.Name(), "run")
    _ = make([]byte, 16*constant.Mi)
}

4.排查協程泄露

go tool pprof http://localhost:6060/debug/pprof/goroutine

[root@br-apm-001 prometheus-2.40.1.linux-amd64]# go tool pprof http://localhost:6060/debug/pprof/goroutine
Fetching profile over HTTP from http://localhost:6060/debug/pprof/goroutine
Saved profile in /root/pprof/pprof.pprof-amd64-linux.goroutine.001.pb.gz
File: pprof-amd64-linux
Type: goroutine
Time: Jul 28, 2023 at 9:20am (CST)
Entering interactive mode (type "help" for commands, "o" for options)
(pprof) top
Showing nodes accounting for 90, 98.90% of 91 total
Showing top 10 nodes out of 33
      flat  flat%   sum%        cum   cum%
        89 97.80% 97.80%         89 97.80%  runtime.gopark
         1  1.10% 98.90%          1  1.10%  runtime.goroutineProfileWithLabels
         0     0% 98.90%         80 87.91%  github.com/wolfogre/go-pprof-practice/animal/canidae/wolf.(*Wolf).Drink.func1
         0     0% 98.90%          1  1.10%  github.com/wolfogre/go-pprof-practice/animal/felidae/cat.(*Cat).Live
         0     0% 98.90%          1  1.10%  github.com/wolfogre/go-pprof-practice/animal/felidae/cat.(*Cat).Pee
         0     0% 98.90%          7  7.69%  github.com/wolfogre/go-pprof-practice/animal/muridae/mouse.(*Mouse).Pee.func1
         0     0% 98.90%          1  1.10%  internal/poll.(*FD).Accept
         0     0% 98.90%          1  1.10%  internal/poll.(*pollDesc).wait
         0     0% 98.90%          1  1.10%  internal/poll.(*pollDesc).waitRead (inline)
         0     0% 98.90%          1  1.10%  internal/poll.runtime_pollWait
(pprof) list Drink
Total: 91
ROUTINE ======================== github.com/wolfogre/go-pprof-practice/animal/canidae/wolf.(*Wolf).Drink.func1 in E:/source/go/workspace/go-pprof-practice-master/animal/canidae/wolf/wolf.go
         0         80 (flat, cum) 87.91% of Total
 Error: could not find file E:/source/go/workspace/go-pprof-practice-master/animal/canidae/wolf/wolf.go on path /data/br/base/prometheus-2.40.1.linux-amd64

func (w *Wolf) Drink() {
    log.Println(w.Name(), "drink")
    for i := 0; i < 10; i++ {
        go func() {
            time.Sleep(30 * time.Second)
        }()
    }
}

5.排查鎖的爭用

go tool pprof http://localhost:6060/debug/pprof/mutex

[root@br-apm-001 prometheus-2.40.1.linux-amd64]# go tool pprof http://localhost:6060/debug/pprof/mutex
Fetching profile over HTTP from http://localhost:6060/debug/pprof/mutex
Saved profile in /root/pprof/pprof.pprof-amd64-linux.contentions.delay.001.pb.gz
File: pprof-amd64-linux
Type: delay
Time: Jul 28, 2023 at 9:25am (CST)
Entering interactive mode (type "help" for commands, "o" for options)
(pprof) top
Showing nodes accounting for 5.01s, 100% of 5.01s total
      flat  flat%   sum%        cum   cum%
     5.01s   100%   100%      5.01s   100%  sync.(*Mutex).Unlock (inline)
         0     0%   100%      5.01s   100%  github.com/wolfogre/go-pprof-practice/animal/canidae/wolf.(*Wolf).Howl.func1
(pprof) list Howl
Total: 5.01s
ROUTINE ======================== github.com/wolfogre/go-pprof-practice/animal/canidae/wolf.(*Wolf).Howl.func1 in E:/source/go/workspace/go-pprof-practice-master/animal/canidae/wolf/wolf.go
         0      5.01s (flat, cum)   100% of Total
 Error: could not find file E:/source/go/workspace/go-pprof-practice-master/animal/canidae/wolf/wolf.go on path /data/br/base/prometheus-2.40.1.linux-amd64
(pprof)

func (w *Wolf) Howl() {
    log.Println(w.Name(), "howl")

    m := &sync.Mutex{}
    m.Lock()
    go func() {
        time.Sleep(time.Second)
        m.Unlock()
    }()
    m.Lock()
}

6.排查阻塞操作

go tool pprof http://localhost:6060/debug/pprof/block

[root@br-apm-001 prometheus-2.40.1.linux-amd64]# go tool pprof http://localhost:6060/debug/pprof/block
Fetching profile over HTTP from http://localhost:6060/debug/pprof/block
Saved profile in /root/pprof/pprof.pprof-amd64-linux.contentions.delay.002.pb.gz
File: pprof-amd64-linux
Type: delay
Time: Jul 28, 2023 at 9:28am (CST)
Entering interactive mode (type "help" for commands, "o" for options)
(pprof) top
Showing nodes accounting for 8.01s, 100% of 8.01s total
      flat  flat%   sum%        cum   cum%
     8.01s   100%   100%      8.01s   100%  runtime.chanrecv1
         0     0%   100%      8.01s   100%  github.com/wolfogre/go-pprof-practice/animal/felidae/cat.(*Cat).Live
         0     0%   100%      8.01s   100%  github.com/wolfogre/go-pprof-practice/animal/felidae/cat.(*Cat).Pee
         0     0%   100%      8.01s   100%  main.main
         0     0%   100%      8.01s   100%  runtime.main
(pprof) list Pee
Total: 8.01s
ROUTINE ======================== github.com/wolfogre/go-pprof-practice/animal/felidae/cat.(*Cat).Pee in E:/source/go/workspace/go-pprof-practice-master/animal/felidae/cat/cat.go
         0      8.01s (flat, cum)   100% of Total
 Error: could not find file E:/source/go/workspace/go-pprof-practice-master/animal/felidae/cat/cat.go on path /data/br/base/prometheus-2.40.1.linux-amd64
(pprof)

func (c *Cat) Pee() {
    log.Println(c.Name(), "pee")

    <-time.After(time.Second)
}

參考

https://blog.wolfogre.com/posts/go-ppof-practice/
https://chanjarster.github.io/post/go/pprof-explained/

?著作權歸作者所有,轉載或內容合作請聯系作者
平臺聲明：文章內容（如有圖片或視頻亦包括在內）由作者上傳并發布，文章內容僅代表作者本人觀點，簡書系信息發布平臺，僅提供信息存儲服務。

人面猴
序言：七十年代末，一起剝皮案震驚了整個濱河市，隨后出現的幾起案子，更是在濱河造成了極大的恐慌，老刑警劉巖，帶你破解...
沈念sama閱讀 228,316評論 6贊 531
死咒
序言：濱河連續發生了三起死亡事件，死亡現場離奇詭異，居然都是意外死亡，警方通過查閱死者的電腦和手機，發現死者居然都...
沈念sama閱讀 98,481評論 3贊 415
救了他兩次的神仙讓他今天三更去死
文/潘曉璐我一進店門，熙熙樓的掌柜王于貴愁眉苦臉地迎上來，“玉大人，你說我怎么就攤上這事。” “怎么了？”我有些...
開封第一講書人閱讀 176,241評論 0贊 374
道士緝兇錄：失蹤的賣姜人
文/不壞的土叔我叫張陵，是天一觀的道長。經常有香客問我，道長，這世上最難降的妖魔是什么？我笑而不...
開封第一講書人閱讀 62,939評論 1贊 309
?港島之戀（遺憾婚禮）
正文為了忘掉前任，我火速辦了婚禮，結果婚禮上，老公的妹妹穿的比我還像新娘。我一直安慰自己，他們只是感情好，可當我...
茶點故事閱讀 71,697評論 6贊 409
惡毒庶女頂嫁案：這布局不是一般人想出來的
文/花漫我一把揭開白布。她就那樣靜靜地躺著，像睡著了一般。火紅的嫁衣襯著肌膚如雪。梳的紋絲不亂的頭發上，一...
開封第一講書人閱讀 55,182評論 1贊 324
城市分裂傳說
那天，我揣著相機與錄音，去河邊找鬼。笑死，一個胖子當著我的面吹牛，可吹牛的內容都是我干的。我是一名探鬼主播，決...
沈念sama閱讀 43,247評論 3贊 441
雙鴛鴦連環套：你想象不到人心有多黑
文/蒼蘭香墨我猛地睜開眼，長吁一口氣：“原來是場噩夢啊……” “哼！你這毒婦竟也來了？” 一聲冷哼從身側響起，我...
開封第一講書人閱讀 42,406評論 0贊 288
萬榮殺人案實錄
序言：老撾萬榮一對情侶失蹤，失蹤者是張志新（化名）和其女友劉穎，沒想到半個月后，有當地人在樹林里發現了一具尸體，經...
沈念sama閱讀 48,933評論 1贊 334
?護林員之死
正文獨居荒郊野嶺守林人離奇死亡，尸身上長有42處帶血的膿包…… 初始之章·張勛以下內容為張勛視角年9月15日...
茶點故事閱讀 40,772評論 3贊 354
?白月光啟示錄
正文我和宋清朗相戀三年，在試婚紗的時候發現自己被綠了。大學時的朋友給我發了我未婚夫和他白月光在一起吃飯的照片。...
茶點故事閱讀 42,973評論 1贊 369
活死人
序言：一個原本活蹦亂跳的男人離奇死亡，死狀恐怖，靈堂內的尸體忽然破棺而出，到底是詐尸還是另有隱情，我是刑警寧澤，帶...
沈念sama閱讀 38,516評論 5贊 359
?日本核電站爆炸內幕
正文年R本政府宣布，位于F島的核電站，受9級特大地震影響，放射性物質發生泄漏。R本人自食惡果不足惜，卻給世界環境...
茶點故事閱讀 44,209評論 3贊 347
男人毒藥：我在死后第九天來索命
文/蒙蒙一、第九天我趴在偏房一處隱蔽的房頂上張望。院中可真熱鬧，春花似錦、人聲如沸。這莊子的主人今日做“春日...
開封第一講書人閱讀 34,638評論 0贊 26
一樁弒父案，背后竟有這般陰謀
文/蒼蘭香墨我抬頭看了看天上的太陽。三九已至，卻和暖如春，著一層夾襖步出監牢的瞬間，已是汗流浹背。一陣腳步聲響...
開封第一講書人閱讀 35,866評論 1贊 285
情欲美人皮
我被黑心中介騙來泰國打工，沒想到剛下飛機就差點兒被人妖公主榨干…… 1. 我叫王不留，地道東北人。一個月前我還...
沈念sama閱讀 51,644評論 3贊 391
代替公主和親
正文我出身青樓，卻偏偏與公主長得像，于是被迫代替她去往敵國和親。傳聞我的和親對象是個殘疾皇子，可洞房花燭夜當晚...
茶點故事閱讀 47,953評論 2贊 373

三个男躁一个女,国精产品一区一手机的秘密,麦子交换系列最经典十句话,欧美国产综合欧美视频

golang pprof

golang pprof

0.flat/cum含義

1.排查CPU問題

2.排查內存

3.排查排查頻繁內存回收

4.排查協程泄露

5.排查鎖的爭用

6.排查阻塞操作

參考

推薦閱讀更多精彩內容

三个男躁一个女,国精产品一区一手机的秘密,麦子交换系列最经典十句话,欧美 国产 综合 欧美 视频

golang pprof

0.flat/cum含義

1.排查CPU問題

2.排查內存

3.排查排查頻繁內存回收

4.排查協程泄露

5.排查鎖的爭用

6.排查阻塞操作

參考

推薦閱讀更多精彩內容

三个男躁一个女,国精产品一区一手机的秘密,麦子交换系列最经典十句话,欧美国产综合欧美视频