update profiling pause function (#458)

* fix the hit of pause function

* display the paused status

* display refresh interval in header

cmd/profile.go

@@ -198,16 +198,17 @@ func (p *profiler) flush(timeStamp time.Time, keyStats []keyStat, done bool) {
 		}
 	}
 	output := make([]string, 3)
-	output[0] = fmt.Sprintf("> JuiceFS Profiling %13s %45s", head, timeStamp.Format("2006-01-02T15:04:05"))
+	output[0] = fmt.Sprintf("> JuiceFS Profiling %13s  Refresh: %.0f seconds %20s",
+		head, p.interval.Seconds(), timeStamp.Format("2006-01-02T15:04:05"))
 	output[2] = fmt.Sprintf("%-14s %10s %15s %18s %14s", "Operation", "Count", "Average(us)", "Total(us)", "Percent(%)")
 	for _, s := range keyStats {
 		output = append(output, fmt.Sprintf("%-14s %10d %15.0f %18d %14.1f",
 			s.key, s.sPtr.count, float64(s.sPtr.total)/float64(s.sPtr.count), s.sPtr.total, float64(s.sPtr.total)/float64(p.interval.Microseconds())*100.0))
 	}
-	printLines(output, p.tty)
 	if p.replay {
 		output[1] = fmt.Sprintln("\n[enter]Pause/Continue")
 	}
+	printLines(output, p.tty)
 }
 
 func (p *profiler) flusher() {
@@ -245,6 +246,7 @@ func (p *profiler) flusher() {
 				os.Exit(0)
 			}
 		case paused = <-p.pause:
+			fmt.Printf("\n\033[97mPaused. Press [enter] to continue.\n\033[0m")
 			<-p.pause
 		case done = <-p.done:
 		}