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profiling.go
58 lines (50 loc) · 1.63 KB
/
profiling.go
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// Copyright 2018 Istio Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package server
import (
"fmt"
"net"
"net/http"
"net/http/pprof"
)
//StartProfiling start the profiling for Galley
func StartProfiling(stop <-chan struct{}, port uint) {
lis, err := net.Listen("tcp", fmt.Sprintf(":%v", port))
if err != nil {
scope.Errorf("Unable to listen on profiling port %v: %v", port, err)
return
}
mux := http.NewServeMux()
mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
//Redirect ROOT to /debug/pprof/ for convenience
http.Redirect(w, r, "/debug/pprof/", http.StatusSeeOther)
})
mux.HandleFunc("/debug/pprof/", pprof.Index)
mux.HandleFunc("/debug/pprof/cmdline", pprof.Cmdline)
mux.HandleFunc("/debug/pprof/profile", pprof.Profile)
mux.HandleFunc("/debug/pprof/symbol", pprof.Symbol)
mux.HandleFunc("/debug/pprof/trace", pprof.Trace)
server := &http.Server{
Handler: mux,
}
go func() {
if err := server.Serve(lis); err != nil {
scope.Errorf("Profiling http server failed: %v", err)
return
}
}()
<-stop
err = server.Close()
scope.Debugf("Profiling http server terminated: %v", err)
}