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pkg/debugutil: add 'mutex' profiler (Go 1.8+) 

Signed-off-by: Gyu-Ho Lee <gyuhox@gmail.com>
release-3.2
Gyu-Ho Lee 2017-04-18 10:00:09 -07:00
parent dd0d590217
commit 5161b74799
1 changed files with 8 additions and 0 deletions
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8
pkg/debugutil/pprof.go
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@ -17,12 +17,19 @@ package debugutil
import ( import (
"net/http" "net/http"
"net/http/pprof" "net/http/pprof"
"runtime"
) )
const HTTPPrefixPProf = "/debug/pprof" const HTTPPrefixPProf = "/debug/pprof"
// PProfHandlers returns a map of pprof handlers keyed by the HTTP path. // PProfHandlers returns a map of pprof handlers keyed by the HTTP path.
func PProfHandlers() map[string]http.Handler { func PProfHandlers() map[string]http.Handler {
// set only when there's no existing setting
if runtime.SetMutexProfileFraction(-1) == 0 {
// 1 out of 5 mutex events are reported, on average
runtime.SetMutexProfileFraction(5)
}
m := make(map[string]http.Handler) m := make(map[string]http.Handler)
m[HTTPPrefixPProf+"/"] = http.HandlerFunc(pprof.Index) m[HTTPPrefixPProf+"/"] = http.HandlerFunc(pprof.Index)
@ -34,6 +41,7 @@ func PProfHandlers() map[string]http.Handler {
m[HTTPPrefixPProf+"/goroutine"] = pprof.Handler("goroutine") m[HTTPPrefixPProf+"/goroutine"] = pprof.Handler("goroutine")
m[HTTPPrefixPProf+"/threadcreate"] = pprof.Handler("threadcreate") m[HTTPPrefixPProf+"/threadcreate"] = pprof.Handler("threadcreate")
m[HTTPPrefixPProf+"/block"] = pprof.Handler("block") m[HTTPPrefixPProf+"/block"] = pprof.Handler("block")
m[HTTPPrefixPProf+"/mutex"] = pprof.Handler("mutex")
return m return m
} }