介绍
gops是一个命令行工具，配合agent，可以用来很方便的诊断运行中的go程序，使用简单，官方维护
安装
go get github.com/google/gops // 或者 go install github.com/google/gops@latest
使用
gops本身可以查看所有go程序的进程，如果一个程序使用了agent，gops可以报告更多的信息，比如stack，内存统计，trace等，使用了agent的程序会用*号标记
使用agent
go func() {
cfg := agent.Options{
Addr: ":2022", //远程调试使用，绑定对应的进程pid
ShutdownCleanup: true,
}
if err := agent.Listen(cfg); err != nil {
panic(err)
}
}()
gops支持远程诊断，只需要将换成Host:Port即可
列出所有go进程
root@2kpBjdU4m:~# gops PID PPID Name Version Location 52222 850 docker-proxy go1.13.8 /usr/bin/docker-proxy 162404 162302 gopls go1.17.5 /root/go/bin/gopls 169840 169738 gopls go1.17.5 /root/go/bin/gopls 171257 162544 web * go1.17.5 /home/2kpBjdU4m/hub/gen-server/web 171289 170774 gops go1.17.5 /root/go/bin/gops 850 1 dockerd go1.13.8 /usr/bin/dockerd
查看进程详情
root@2kpBjdU4m:~# gops 171257 parent PID: 162544 threads: 9 memory usage: 0.266% cpu usage: 99.498% username: root cmd+args: ./web elapsed time: 02:18 local/remote: 172.19.0.1:44384 <-> 172.19.0.12:3306 (ESTABLISHED) local/remote: 172.19.0.1:48492 <-> 172.19.0.7:27017 (ESTABLISHED) local/remote: 172.19.0.1:45504 <-> 172.19.0.5:9200 (ESTABLISHED) local/remote: 172.19.0.1:48494 <-> 172.19.0.7:27017 (ESTABLISHED) local/remote: 172.19.0.1:48490 <-> 172.19.0.7:27017 (ESTABLISHED) local/remote: :::2022 <-> :::0 (LISTEN)
可以指定收集时间
root@2kpBjdU4m:~# gops 172381 10s parent PID: 162544 threads: 9 memory usage: 0.277% cpu usage: 99.678% cpu usage (10s): 100.400% username: root cmd+args: ./web elapsed time: 03:06 local/remote: 172.19.0.1:48600 <-> 172.19.0.7:27017 (ESTABLISHED) local/remote: 172.19.0.1:48602 <-> 172.19.0.7:27017 (ESTABLISHED) local/remote: 172.19.0.1:45614 <-> 172.19.0.5:9200 (ESTABLISHED) local/remote: 172.19.0.1:44496 <-> 172.19.0.12:3306 (ESTABLISHED) local/remote: 172.19.0.1:48604 <-> 172.19.0.7:27017 (ESTABLISHED) local/remote: :::2022 <-> :::0 (LISTEN) local/remote: :::2023 <-> :::0 (LISTEN)
查看stack信息
root@2kpBjdU4m:~# gops stack 172381
goroutine 85 [running]:
runtime/pprof.writeGoroutineStacks({0x1033f60, 0xc00050e030})
/usr/local/go/src/runtime/pprof/pprof.go:693 +0x70
runtime/pprof.writeGoroutine({0x1033f60, 0xc00050e030}, 0x0)
/usr/local/go/src/runtime/pprof/pprof.go:682 +0x2b
runtime/pprof.(*Profile).WriteTo(0xe88671, {0x1033f60, 0xc00050e030}, 0x0)
/usr/local/go/src/runtime/pprof/pprof.go:331 +0x14b
github.com/google/gops/agent.handle({0x7fb5e4678718, 0xc00050e030}, {0xc0000382a0, 0x9, 0xc0000a3fc0})
/root/go/pkg/mod/github.com/google/gops@v0.3.22/agent/agent.go:201 +0x15d
github.com/google/gops/agent.listen()
/root/go/pkg/mod/github.com/google/gops@v0.3.22/agent/agent.go:145 +0x19a
created by github.com/google/gops/agent.Listen
/root/go/pkg/mod/github.com/google/gops@v0.3.22/agent/agent.go:123 +0x365
goroutine 1 [chan receive, 4 minutes]:
main.main()
/home/2kpBjdU4m/hub/gen-server/cmd/web/main.go:108 +0x82b
查看内存统计
root@2kpBjdU4m:~# gops memstats 172381 alloc: 2.61MB (2740864 bytes) total-alloc: 5.63MB (5904904 bytes) sys: 15.08MB (15811592 bytes) lookups: 0 mallocs: 38142 frees: 21689 heap-alloc: 2.61MB (2740864 bytes) heap-sys: 7.38MB (7733248 bytes) heap-idle: 2.99MB (3137536 bytes) heap-in-use: 4.38MB (4595712 bytes) heap-released: 2.47MB (2588672 bytes) heap-objects: 16453 stack-in-use: 640.00KB (655360 bytes) stack-sys: 640.00KB (655360 bytes) stack-mspan-inuse: 70.92KB (72624 bytes) stack-mspan-sys: 80.00KB (81920 bytes) stack-mcache-inuse: 4.69KB (4800 bytes) stack-mcache-sys: 16.00KB (16384 bytes) other-sys: 935.69KB (958148 bytes) gc-sys: 4.69MB (4917416 bytes) next-gc: when heap-alloc >= 4.00MB (4194304 bytes) last-gc: 2022-02-28 17:54:14.439966835 +0800 CST gc-pause-total: 476.578µs gc-pause: 111034 gc-pause-end: 1646042054439966835 num-gc: 3 num-forced-gc: 0 gc-cpu-fraction: 7.774838758506689e-06 enable-gc: true debug-gc: false
查看runtime stats
root@2kpBjdU4m:~# gops stats 172381 goroutines: 27 OS threads: 11 GOMAXPROCS: 4 num CPU: 4
查看trace
gops允许你收集5s runtime tracer，然后提供浏览器访问
root@2kpBjdU4m:~# gops trace 172381 Tracing now, will take 5 secs... Trace dump saved to: /tmp/trace1196940716 2022/02/28 17:57:30 Parsing trace... 2022/02/28 17:57:30 Splitting trace... 2022/02/28 17:57:30 Opening browser. Trace viewer is listening on http://127.0.0.1:35507
强制gc垃圾收集
运行gops gc立即执行垃圾回收，程序会被阻塞，直到gc完成
pprof实时交互
gops支持内存和cpu pprof分析，在收集数据之后，调用go tool pprof，进入交互样本分析界面
root@2kpBjdU4m:~# gops pprof-heap 172381 Profile dump saved to: /tmp/heap_profile2317160970 Binary file saved to: /tmp/binary3943624338 File: binary3943624338 Type: inuse_space Time: Feb 28, 2022 at 6:08pm (CST) Entering interactive mode (type "help" for commands, "o" for options) (pprof) top Showing nodes accounting for 3620.55kB, 100% of 3620.55kB total Showing top 10 nodes out of 40 flat flat% sum% cum cum% 1025kB 28.31% 28.31% 1025kB 28.31% runtime.allocm 544.67kB 15.04% 43.35% 544.67kB 15.04% github.com/xdg-go/stringprep.init 514.63kB 14.21% 57.57% 514.63kB 14.21% regexp.makeOnePass.func1 512.20kB 14.15% 71.72% 512.20kB 14.15% runtime.malg 512.04kB 14.14% 85.86% 512.04kB 14.14% github.com/segmentio/kafka-go/protocol.structDecodeFuncOf.func1.1 512.02kB 14.14% 100% 512.02kB 14.14% github.com/segmentio/kafka-go/protocol.structEncodeFuncOf 0 0% 100% 514.63kB 14.21% github.com/go-playground/validator/v10.init 0 0% 100% 1024.05kB 28.28% github.com/segmentio/kafka-go/protocol.Register 0 0% 100% 512.04kB 14.14% github.com/segmentio/kafka-go/protocol.decodeFuncOf 0 0% 100% 512.02kB 14.14% github.com/segmentio/kafka-go/protocol.encodeFuncOf (pprof)
更多
官方文档：https://github.com/google/gops
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