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Felix Geisendörfer
2021-02-08 15:13:20 +01:00
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@ -2,6 +2,21 @@ This document was last updated for `go1.15.6` but probably still applies to olde
# Goroutine Profiling in Go # Goroutine Profiling in Go
- [Goroutine Profiling in Go](#goroutine-profiling-in-go)
* [Description](#description)
* [Overhead](#overhead)
* [Goroutine Properties](#goroutine-properties)
* [APIs](#apis)
+ [[`runtime.Stack()`](https://golang.org/pkg/runtime/#Stack) / [`pprof.Lookup(debug=2)`](https://golang.org/pkg/runtime/pprof/#Lookup)](#--runtimestack-----https---golangorg-pkg-runtime--stack-------pproflookup-debug-2----https---golangorg-pkg-runtime-pprof--lookup-)
+ [[`pprof.Lookup(debug=1)`](https://golang.org/pkg/runtime/pprof/#Lookup)](#--pproflookup-debug-1----https---golangorg-pkg-runtime-pprof--lookup-)
+ [[`pprof.Lookup(debug=0)`](https://golang.org/pkg/runtime/pprof/#Lookup)](#--pproflookup-debug-0----https---golangorg-pkg-runtime-pprof--lookup-)
+ [[`runtime.GoroutineProfile()`](https://golang.org/pkg/runtime/#GoroutineProfile)](#--runtimegoroutineprofile-----https---golangorg-pkg-runtime--goroutineprofile-)
+ [[`net/http/pprof`](https://golang.org/pkg/net/http/pprof/)](#--net-http-pprof---https---golangorg-pkg-net-http-pprof--)
* [History](#history)
* [Disclaimers](#disclaimers)
## Description
The Go runtime keeps track of all goroutines in a simple slice called [allgs](https://github.com/golang/go/blob/3a778ff50f7091b8a64875c8ed95bfaacf3d334c/src/runtime/proc.go#L500). It contains both active and dead goroutines. The latter are kept around for reuse when new goroutines are spawned. The Go runtime keeps track of all goroutines in a simple slice called [allgs](https://github.com/golang/go/blob/3a778ff50f7091b8a64875c8ed95bfaacf3d334c/src/runtime/proc.go#L500). It contains both active and dead goroutines. The latter are kept around for reuse when new goroutines are spawned.
Go has various APIs to inspect the active goroutines in `allgs` along with their current stack trace, as well as various other properties. Some APIs expose this information as statistical summaries, while other APIs provide information for each individual goroutine. Go has various APIs to inspect the active goroutines in `allgs` along with their current stack trace, as well as various other properties. Some APIs expose this information as statistical summaries, while other APIs provide information for each individual goroutine.