pkg/debugutil: add 'mutex' profiler (Go 1.8+)
@@ -17,12 +17,19 @@ package debugutil
import (
"net/http"
"net/http/pprof"
+ "runtime"
)
const HTTPPrefixPProf = "/debug/pprof"
// PProfHandlers returns a map of pprof handlers keyed by the HTTP path.
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[HTTPPrefixPProf+"/"] = http.HandlerFunc(pprof.Index)
@@ -34,6 +41,7 @@ func PProfHandlers() map[string]http.Handler {
m[HTTPPrefixPProf+"/goroutine"] = pprof.Handler("goroutine")
m[HTTPPrefixPProf+"/threadcreate"] = pprof.Handler("threadcreate")
m[HTTPPrefixPProf+"/block"] = pprof.Handler("block")
+ m[HTTPPrefixPProf+"/mutex"] = pprof.Handler("mutex")
return m
}
