SIGINT is now captured. Linux/MacOS shutdown for pcpdumptext child

processes added to clean up after we finish running. Made all tasks
run on bridged network mode so that benchmarks that heavily utilize
network are protected from eachother. I.e: Tradebeans, tradesoap

pcp/pcp.go

@@ -6,11 +6,13 @@ import (
 	"os/exec"
 	"time"
 	"os"
+	"syscall"
 )
 
 func Start(quit chan struct{}, logging *bool, prefix string) {
 	const pcpCommand string = "pmdumptext -m -l -f '' -t 1.0 -d , -c config"
 	cmd := exec.Command("sh", "-c", pcpCommand)
+	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
 	startTime := time.Now().Format("20060102150405")
 
 
@@ -76,16 +78,16 @@ func Start(quit chan struct{}, logging *bool, prefix string) {
 		log.Fatal(err)
 	}
 
+	pgid, err := syscall.Getpgid(cmd.Process.Pid)
+
 	select{
 	case <- quit:
 		log.Println("Stopping PCP logging in 5 seconds")
 		time.Sleep(5 * time.Second)
-		cmd.Process.Kill()
+
+		// http://stackoverflow.com/questions/22470193/why-wont-go-kill-a-child-process-correctly
+		// kill process and all children processes
+		syscall.Kill(-pgid, 15)
 		return
 	}
-
-		/*
-	if err := cmd.Wait(); err != nil {
-		log.Fatal(err)
-	}*/
 }