add default.pgo in client &

added an option to enable pprof on client

client/config.go

@@ -37,6 +37,7 @@ type Config struct {
 	SnmpPeriod   int    `json:"snmpperiod"`
 	Quiet        bool   `json:"quiet"`
 	TCP          bool   `json:"tcp"`
+	Pprof        bool   `json:"pprof"`
 }
 
 func parseJSONConfig(config *Config, path string) error {

client/main.go

@@ -7,6 +7,8 @@ import (
 	"log"
 	"math/rand"
 	"net"
+	"net/http"
+	_ "net/http/pprof"
 	"os"
 	"time"
 
@@ -243,6 +245,10 @@ func main() {
 			Value: "", // when the value is not empty, the config path must exists
 			Usage: "config from json file, which will override the command from shell",
 		},
+		cli.BoolFlag{
+			Name:  "pprof",
+			Usage: "start profiling server on :6060",
+		},
 	}
 	myApp.Action = func(c *cli.Context) error {
 		config := Config{}
@@ -276,6 +282,7 @@ func main() {
 		config.SnmpPeriod = c.Int("snmpperiod")
 		config.Quiet = c.Bool("quiet")
 		config.TCP = c.Bool("tcp")
+		config.Pprof = c.Bool("pprof")
 
 		if c.String("c") != "" {
 			err := parseJSONConfig(&config, c.String("c"))
@@ -341,6 +348,7 @@ func main() {
 		log.Println("snmpperiod:", config.SnmpPeriod)
 		log.Println("quiet:", config.Quiet)
 		log.Println("tcp:", config.TCP)
+		log.Println("pprof:", config.Pprof)
 
 		// parameters check
 		if config.SmuxVer > maxSmuxVer {
@@ -443,6 +451,11 @@ func main() {
 		// start snmp logger
 		go generic.SnmpLogger(config.SnmpLog, config.SnmpPeriod)
 
+		// start pprof
+		if config.Pprof {
+			go http.ListenAndServe(":6060", nil)
+		}
+
 		// start scavenger
 		chScavenger := make(chan timedSession, 128)
 		go scavenger(chScavenger, &config)