[bugfix] preempt

src/scheduler_FCFS.go

@@ -23,7 +23,7 @@ func (scheduler *SchedulerFCFS) Start() {
 
 	go func() {
 		for {
-			log.Info("Scheduling")
+			log.Debug("Scheduling")
 			time.Sleep(time.Second * 5)
 			scheduler.scheduling.Lock()
 			scheduler.mu.Lock()

src/scheduler_priority.go

@@ -143,6 +143,7 @@ func (scheduler *SchedulerPriority) Start() {
 							if after != before {
 								break
 							}
+							log.Info("before=", before, " after=", after)
 							time.Sleep(time.Millisecond * 100)
 						}
 					}