Add fgprof profiler (#3122)

Signed-off-by: Ben Ye <[email protected]>

go.mod

@@ -16,6 +16,7 @@ require (
 	github.com/davecgh/go-spew v1.1.1
 	github.com/facette/natsort v0.0.0-20181210072756-2cd4dd1e2dcb
 	github.com/fatih/structtag v1.1.0
+	github.com/felixge/fgprof v0.9.1
 	github.com/fsnotify/fsnotify v1.4.7
 	github.com/go-kit/kit v0.10.0
 	github.com/go-openapi/strfmt v0.19.5

go.sum

@@ -269,6 +269,8 @@ github.com/fatih/color v1.9.0 h1:8xPHl4/q1VyqGIPif1F+1V3Y3lSmrq01EabUW3CoW5s=
 github.com/fatih/color v1.9.0/go.mod h1:eQcE1qtQxscV5RaZvpXrrb8Drkc3/DdQ+uUYCNjL+zU=
 github.com/fatih/structtag v1.1.0 h1:6j4mUV/ES2duvnAzKMFkN6/A5mCaNYPD3xfbAkLLOF8=
 github.com/fatih/structtag v1.1.0/go.mod h1:mBJUNpUnHmRKrKlQQlmCrh5PuhftFbNv8Ys4/aAZl94=
+github.com/felixge/fgprof v0.9.1 h1:E6FUJ2Mlv043ipLOCFqo8+cHo9MhQ203E2cdEK/isEs=
+github.com/felixge/fgprof v0.9.1/go.mod h1:7/HK6JFtFaARhIljgP2IV8rJLIoHDoOYoUphsnGvqxE=
 github.com/felixge/httpsnoop v1.0.1 h1:lvB5Jl89CsZtGIWuTcDM1E/vkVs49/Ml7JJe07l8SPQ=
 github.com/felixge/httpsnoop v1.0.1/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
 github.com/fogleman/gg v1.2.1-0.20190220221249-0403632d5b90/go.mod h1:R/bRT+9gY/C5z7JzPU0zXsXHKM4/ayA+zqcVNZzPa1k=
@@ -472,6 +474,8 @@ github.com/google/pprof v0.0.0-20190515194954-54271f7e092f/go.mod h1:zfwlbNMJ+OI
 github.com/google/pprof v0.0.0-20191218002539-d4f498aebedc/go.mod h1:ZgVRPoUq/hfqzAqh7sHMqb3I9Rq5C59dIz2SbBwJ4eM=
 github.com/google/pprof v0.0.0-20200212024743-f11f1df84d12/go.mod h1:ZgVRPoUq/hfqzAqh7sHMqb3I9Rq5C59dIz2SbBwJ4eM=
 github.com/google/pprof v0.0.0-20200229191704-1ebb73c60ed3/go.mod h1:ZgVRPoUq/hfqzAqh7sHMqb3I9Rq5C59dIz2SbBwJ4eM=
+github.com/google/pprof v0.0.0-20200615235658-03e1cf38a040/go.mod h1:ZgVRPoUq/hfqzAqh7sHMqb3I9Rq5C59dIz2SbBwJ4eM=
+github.com/google/pprof v0.0.0-20200708004538-1a94d8640e99 h1:Ak8CrdlwwXwAZxzS66vgPt4U8yUZX7JwLvVR58FN5jM=
 github.com/google/pprof v0.0.0-20200708004538-1a94d8640e99/go.mod h1:ZgVRPoUq/hfqzAqh7sHMqb3I9Rq5C59dIz2SbBwJ4eM=
 github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm40UhjYkI=
 github.com/google/uuid v1.0.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=

pkg/server/http/http.go

@@ -8,6 +8,7 @@ import (
 	"net/http"
 	"net/http/pprof"
 
+	"github.com/felixge/fgprof"
 	"github.com/go-kit/kit/log"
 	"github.com/go-kit/kit/log/level"
 	"github.com/pkg/errors"
@@ -94,6 +95,7 @@ func registerProfiler(mux *http.ServeMux) {
 	mux.HandleFunc("/debug/pprof/profile", pprof.Profile)
 	mux.HandleFunc("/debug/pprof/symbol", pprof.Symbol)
 	mux.HandleFunc("/debug/pprof/trace", pprof.Trace)
+	mux.Handle("/debug/fgprof", fgprof.Handler())
 }
 
 func registerMetrics(mux *http.ServeMux, g prometheus.Gatherer) {