add net/http/pprof profiler

debug/profile/http/http.go

@@ -0,0 +1,78 @@
+// Package http enables the http profiler
+package http
+
+import (
+	"context"
+	"net/http"
+	"net/http/pprof"
+	"sync"
+
+	"github.com/micro/go-micro/debug/profile"
+)
+
+type httpProfile struct {
+	sync.Mutex
+	running bool
+	server  *http.Server
+}
+
+var (
+	DefaultAddress = ":6060"
+)
+
+// Start the profiler
+func (h *httpProfile) Start() error {
+	h.Lock()
+	defer h.Unlock()
+
+	if h.running {
+		return nil
+	}
+
+	go func() {
+		if err := h.server.ListenAndServe(); err != nil {
+			h.Lock()
+			h.running = false
+			h.Unlock()
+		}
+	}()
+
+	h.running = true
+
+	return nil
+}
+
+// Stop the profiler
+func (h *httpProfile) Stop() error {
+	h.Lock()
+	defer h.Unlock()
+
+	if !h.running {
+		return nil
+	}
+
+	h.running = false
+
+	return h.server.Shutdown(context.TODO())
+}
+
+func (h *httpProfile) String() string {
+	return "http"
+}
+
+func NewProfile(opts ...profile.Option) profile.Profile {
+	mux := http.NewServeMux()
+
+	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)
+
+	return &httpProfile{
+		server: &http.Server{
+			Addr:    DefaultAddress,
+			Handler: mux,
+		},
+	}
+}

debug/profile/pprof/pprof.go

@@ -107,6 +107,10 @@ func (p *profiler) Stop() error {
 	}
 }
 
+func (p *profiler) String() string {
+	return "pprof"
+}
+
 func NewProfile(opts ...profile.Option) profile.Profile {
 	var options profile.Options
 	for _, o := range opts {

debug/profile/profile.go

@@ -6,6 +6,8 @@ type Profile interface {
 	Start() error
 	// Stop the profiler
 	Stop() error
+	// Name of the profiler
+	String() string
 }
 
 type Options struct {

service.go

@@ -3,6 +3,7 @@ package micro
 import (
 	"os"
 	"os/signal"
+	"runtime"
 	"strings"
 	"sync"
 	"syscall"
@@ -10,6 +11,7 @@ import (
 	"github.com/micro/go-micro/client"
 	"github.com/micro/go-micro/config/cmd"
 	"github.com/micro/go-micro/debug/profile"
+	"github.com/micro/go-micro/debug/profile/http"
 	"github.com/micro/go-micro/debug/profile/pprof"
 	"github.com/micro/go-micro/debug/service/handler"
 	"github.com/micro/go-micro/plugin"
@@ -151,12 +153,25 @@ func (s *service) Run() error {
 	// start the profiler
 	// TODO: set as an option to the service, don't just use pprof
 	if prof := os.Getenv("MICRO_DEBUG_PROFILE"); len(prof) > 0 {
+		var profiler profile.Profile
+
+		// to view mutex contention
+		runtime.SetMutexProfileFraction(5)
+		// to view blocking profile
+		runtime.SetBlockProfileRate(1)
+
+		switch prof {
+		case "http":
+			profiler = http.NewProfile()
+		default:
 			service := s.opts.Server.Options().Name
 			version := s.opts.Server.Options().Version
 			id := s.opts.Server.Options().Id
-		profiler := pprof.NewProfile(
+			profiler = pprof.NewProfile(
 				profile.Name(service + "." + version + "." + id),
 			)
+		}
+
 		if err := profiler.Start(); err != nil {
 			return err
 		}