diff --git a/src/job_manager.go b/src/job_manager.go
index bef25bb..bfde255 100644
--- a/src/job_manager.go
+++ b/src/job_manager.go
@@ -70,6 +70,7 @@ func (jm *JobManager) start() {
 		v.Set("mem_limit", strconv.Itoa(jm.job.Tasks[i].Memory)+"m")
 		v.Set("cpu_limit", strconv.Itoa(jm.job.Tasks[i].NumberCPU))
 		v.Set("network", network)
+		v.Set("should_wait", "1")
 
 		resp, err := doRequest("POST", "http://"+jm.resources[i].ClientHost+":8000/create", strings.NewReader(v.Encode()), "application/x-www-form-urlencoded", "")
 		if err != nil {
@@ -106,7 +107,6 @@ func (jm *JobManager) start() {
 			} else if res.Status[i].Status == "running" {
 				log.Debug(jm.job.Name, "-", i, " is running")
 				flag = true
-				log.Info(jm.job.Tasks[i].IsPS)
 				if !jm.job.Tasks[i].IsPS {
 					onlyPS = false
 				}
@@ -138,6 +138,7 @@ func (jm *JobManager) start() {
 		}
 		if onlyPS {
 			jm.stop()
+			log.Info("Only PS is running, stop", jm.job.Name)
 			break
 		}
 		if !flag {
@@ -232,6 +233,6 @@ func (jm *JobManager) stop() MsgStop {
 	}()
 
 	jm.scheduler.UpdateProgress(jm.job.Name, Stopped)
-	log.Info("kill job", jm.job.Name)
+	log.Info("kill job, ", jm.job.Name)
 	return MsgStop{Code: 0}
 }
diff --git a/src/optimizer.go b/src/optimizer.go
index d3e57f6..3886acf 100644
--- a/src/optimizer.go
+++ b/src/optimizer.go
@@ -11,6 +11,9 @@ type Optimizer struct {
 	killedFlag bool
 
 	predicts map[string]OptimizerJobExecutionTime
+
+	jobUtilsGPU map[string]int
+	versions    map[string]int
 }
 
 var optimizerInstance *Optimizer
@@ -23,6 +26,8 @@ func InstanceOfOptimizer() *Optimizer {
 	if optimizerInstance == nil {
 		optimizerInstance = &Optimizer{}
 		optimizerInstance.predicts = map[string]OptimizerJobExecutionTime{}
+		optimizerInstance.jobUtilsGPU = map[string]int{}
+		optimizerInstance.versions = map[string]int{}
 	}
 	return optimizerInstance
 }
@@ -30,11 +35,25 @@ func InstanceOfOptimizer() *Optimizer {
 func (optimizer *Optimizer) feed(job string, utils []int) {
 	log.Info("optimizer feed")
 	log.Info(job, utils)
+	log.Info(optimizer.jobUtilsGPU)
+	log.Info(optimizer.predicts)
 
 	go func() {
 		str := strings.Split(job, "-")
 		if len(str) == 2 {
 			preCnt := 0
+
+			sum := 0
+			for i := 0; i < len(utils); i++ {
+				sum += utils[i]
+			}
+			last := 0
+			if t, err := optimizer.jobUtilsGPU[job]; !err {
+				last = t
+			}
+			optimizer.jobUtilsGPU[job] = (optimizer.versions[job]*last + sum/len(utils)) / (optimizer.versions[job] + 1)
+			optimizer.versions[job]++
+
 			for i := 0; i < len(utils); i++ {
 				if utils[i] > 15 {
 					break
@@ -43,7 +62,7 @@ func (optimizer *Optimizer) feed(job string, utils []int) {
 			}
 
 			postCnt := 0
-			for i := len(utils)-1; i >= 0; i-- {
+			for i := len(utils) - 1; i >= 0; i-- {
 				if utils[i] > 15 {
 					break
 				}
@@ -57,7 +76,25 @@ func (optimizer *Optimizer) feed(job string, utils []int) {
 			predict.Pre = ((predict.Pre * predict.Version) + preCnt) / (predict.Version + 1)
 			predict.Post = ((predict.Post * predict.Version) + postCnt) / (predict.Version + 1)
 			predict.Total = ((predict.Total * predict.Version) + len(utils)) / (predict.Version + 1)
+			predict.Main = predict.Total - predict.Pre - predict.Post
 			predict.Version++
 		}
 	}()
 }
+
+func (optimizer *Optimizer) predictTime(job string, utils []int) (int, bool) {
+	if _, err := optimizer.jobUtilsGPU[job]; err {
+		return 100, false
+	}
+	if optimizer.versions[job] > 5 {
+		return optimizer.jobUtilsGPU[job], true
+	}
+	return optimizer.jobUtilsGPU[job], false
+}
+
+func (optimizer *Optimizer) predictUtilGPU(job string) (OptimizerJobExecutionTime, bool) {
+	if _, err := optimizer.predicts[job]; err {
+		return OptimizerJobExecutionTime{}, false
+	}
+	return optimizer.predicts[job], optimizer.predicts[job].Version > 5
+}
diff --git a/src/util.go b/src/util.go
index 9faf2fa..61a30ec 100644
--- a/src/util.go
+++ b/src/util.go
@@ -170,6 +170,7 @@ type OptimizerJobExecutionTime struct {
 	Pre     int `json:"pre"`
 	Post    int `json:"post"`
 	Total   int `json:"total"`
+	Main    int `json:"main"`
 	Version int `json:"version"`
 }