diff --git a/driver/task_runner.go b/driver/task_runner.go
index c3ecf57..b3c2527 100644
--- a/driver/task_runner.go
+++ b/driver/task_runner.go
@@ -6,20 +6,34 @@ import (
 	"reflect"
 	"strings"
 	"sync"
+	"time"
 
 	"github.com/chrislusf/glow/driver/plan"
 	"github.com/chrislusf/glow/flow"
 	"github.com/chrislusf/glow/netchan"
+	"github.com/chrislusf/glow/util"
 )
 
 type TaskRunner struct {
-	option      *TaskOption
-	Tasks       []*flow.Task
-	FlowContext *flow.FlowContext
+	option         *TaskOption
+	Tasks          []*flow.Task
+	FlowContext    *flow.FlowContext
+	executorStatus *ExecutorStatus
+}
+
+type ExecutorStatus struct {
+	InputChannelStatuses []*util.ChannelStatus
+	OutputChannelStatus  *util.ChannelStatus
+	ReadyTime            time.Time
+	StartTime            time.Time
+	StopTime             time.Time
 }
 
 func NewTaskRunner(option *TaskOption) *TaskRunner {
-	return &TaskRunner{option: option}
+	return &TaskRunner{
+		option:         option,
+		executorStatus: &ExecutorStatus{},
+	}
 }
 
 func (tr *TaskRunner) IsTaskMode() bool {
@@ -36,6 +50,8 @@ func (tr *TaskRunner) Run(fc *flow.FlowContext) {
 	tr.Tasks = plan.GroupTasks(fc)[tr.option.TaskGroupId].Tasks
 	tr.FlowContext = fc
 
+	tr.executorStatus.StartTime = time.Now()
+
 	// println("taskGroup", tr.Tasks[0].Name(), "starts")
 	// 4. setup task input and output channels
 	var wg sync.WaitGroup
@@ -52,6 +68,7 @@ func (tr *TaskRunner) Run(fc *flow.FlowContext) {
 	// 7. need to close connected output channels
 	wg.Wait()
 	// println("taskGroup", tr.Tasks[0].Name(), "finishes")
+	tr.executorStatus.StopTime = time.Now()
 }
 
 func (tr *TaskRunner) connectInputsAndOutputs(wg *sync.WaitGroup) {
@@ -103,7 +120,8 @@ func (tr *TaskRunner) connectExternalInputs(wg *sync.WaitGroup, name2Location ma
 		if err != nil {
 			log.Panic(err)
 		}
-		netchan.ConnectRawReadChannelToTyped(rawChan, firstTask.InputChans[i], d.Type, wg)
+		inChanStatus := netchan.ConnectRawReadChannelToTyped(rawChan, firstTask.InputChans[i], d.Type, wg)
+		tr.executorStatus.InputChannelStatuses = append(tr.executorStatus.InputChannelStatuses, inChanStatus)
 	}
 }
 
@@ -121,7 +139,8 @@ func (tr *TaskRunner) connectExternalInputChannels(wg *sync.WaitGroup) {
 			log.Panic(err)
 		}
 		typedInputChan := make(chan reflect.Value)
-		netchan.ConnectRawReadChannelToTyped(rawChan, typedInputChan, ds.Type, wg)
+		inChanStatus := netchan.ConnectRawReadChannelToTyped(rawChan, typedInputChan, ds.Type, wg)
+		tr.executorStatus.InputChannelStatuses = append(tr.executorStatus.InputChannelStatuses, inChanStatus)
 		firstTask.InputChans = append(firstTask.InputChans, typedInputChan)
 	}
 }
@@ -135,6 +154,6 @@ func (tr *TaskRunner) connectExternalOutputs(wg *sync.WaitGroup) {
 		if err != nil {
 			log.Panic(err)
 		}
-		netchan.ConnectTypedWriteChannelToRaw(shard.WriteChan, rawChan, wg)
+		tr.executorStatus.OutputChannelStatus = netchan.ConnectTypedWriteChannelToRaw(shard.WriteChan, rawChan, wg)
 	}
 }
diff --git a/flow/step_task.go b/flow/step_task.go
index ca9d1a4..dc9e43b 100644
--- a/flow/step_task.go
+++ b/flow/step_task.go
@@ -6,7 +6,7 @@ import (
 	"reflect"
 	"strconv"
 
-	"github.com/chrislusf/glow/netchan"
+	"github.com/chrislusf/glow/util"
 )
 
 type Task struct {
@@ -74,5 +74,5 @@ func (t *Task) MergedInputChan() chan reflect.Value {
 	for _, c := range t.InputChans {
 		prevChans = append(prevChans, c)
 	}
-	return netchan.MergeChannel(prevChans)
+	return util.MergeChannel(prevChans)
 }
diff --git a/netchan/channels.go b/netchan/channels.go
index 52f8f8d..e78ba70 100644
--- a/netchan/channels.go
+++ b/netchan/channels.go
@@ -13,24 +13,25 @@ import (
 
 	"github.com/chrislusf/glow/netchan/receiver"
 	"github.com/chrislusf/glow/netchan/sender"
+	"github.com/chrislusf/glow/util"
 )
 
-type NetworkContext struct {
+type NetworkOption struct {
 	AgentPort int
 }
 
-var networkContext NetworkContext
+var networkOption NetworkOption
 
 func init() {
-	flag.IntVar(&networkContext.AgentPort, "glow.agent.port", 8931, "agent port")
+	flag.IntVar(&networkOption.AgentPort, "glow.agent.port", 8931, "agent port")
 }
 
 func GetLocalSendChannel(name string, wg *sync.WaitGroup) (chan []byte, error) {
-	return sender.NewSendChannel(name, networkContext.AgentPort, wg)
+	return sender.NewSendChannel(name, networkOption.AgentPort, wg)
 }
 
 func GetLocalReadChannel(name string, chanBufferSize int) (chan []byte, error) {
-	return GetDirectReadChannel(name, "localhost:"+strconv.Itoa(networkContext.AgentPort), chanBufferSize)
+	return GetDirectReadChannel(name, "localhost:"+strconv.Itoa(networkOption.AgentPort), chanBufferSize)
 }
 
 func GetDirectReadChannel(name, location string, chanBufferSize int) (chan []byte, error) {
@@ -42,11 +43,12 @@ func GetDirectSendChannel(name string, target string, wg *sync.WaitGroup) (chan
 	return sender.NewDirectSendChannel(name, target, wg)
 }
 
-func ConnectRawReadChannelToTyped(c chan []byte, out chan reflect.Value, t reflect.Type, wg *sync.WaitGroup) chan reflect.Value {
-
+func ConnectRawReadChannelToTyped(c chan []byte, out chan reflect.Value, t reflect.Type, wg *sync.WaitGroup) (status *util.ChannelStatus) {
+	status = util.NewChannelStatus()
 	wg.Add(1)
 	go func() {
 		defer wg.Done()
+		status.ReportStart()
 
 		for data := range c {
 			dec := gob.NewDecoder(bytes.NewBuffer(data))
@@ -55,20 +57,22 @@ func ConnectRawReadChannelToTyped(c chan []byte, out chan reflect.Value, t refle
 				log.Fatal("data type:", v.Kind(), " decode error:", err)
 			} else {
 				out <- reflect.Indirect(v)
+				status.ReportAdd(1)
 			}
 		}
 
 		close(out)
+		status.ReportClose()
 	}()
-
-	return out
-
+	return status
 }
 
-func ConnectTypedWriteChannelToRaw(writeChan reflect.Value, c chan []byte, wg *sync.WaitGroup) {
+func ConnectTypedWriteChannelToRaw(writeChan reflect.Value, c chan []byte, wg *sync.WaitGroup) (status *util.ChannelStatus) {
+	status = util.NewChannelStatus()
 	wg.Add(1)
 	go func() {
 		defer wg.Done()
+		status.ReportStart()
 
 		var t reflect.Value
 		for ok := true; ok; {
@@ -79,39 +83,11 @@ func ConnectTypedWriteChannelToRaw(writeChan reflect.Value, c chan []byte, wg *s
 					log.Fatal("data type:", t.Type().String(), " ", t.Kind(), " encode error:", err)
 				}
 				c <- buf.Bytes()
+				status.ReportAdd(1)
 			}
 		}
 		close(c)
-
-	}()
-
-}
-
-func MergeChannel(cs []chan reflect.Value) (out chan reflect.Value) {
-	out = make(chan reflect.Value)
-	MergeChannelTo(cs, nil, out)
-	return out
-}
-
-func MergeChannelTo(cs []chan reflect.Value, transformFn func(reflect.Value) reflect.Value, out chan reflect.Value) {
-	var wg sync.WaitGroup
-
-	for _, c := range cs {
-		wg.Add(1)
-		go func(c chan reflect.Value) {
-			defer wg.Done()
-			for n := range c {
-				if transformFn != nil {
-					n = transformFn(n)
-				}
-				out <- n
-			}
-		}(c)
-	}
-
-	go func() {
-		wg.Wait()
-		close(out)
+		status.ReportClose()
 	}()
-	return
+	return status
 }
diff --git a/util/channel_status.go b/util/channel_status.go
new file mode 100644
index 0000000..f079533
--- /dev/null
+++ b/util/channel_status.go
@@ -0,0 +1,27 @@
+package util
+
+import (
+	"time"
+)
+
+type ChannelStatus struct {
+	Length    int
+	StartTime time.Time
+	StopTime  time.Time
+}
+
+func NewChannelStatus() *ChannelStatus {
+	return &ChannelStatus{}
+}
+
+func (s *ChannelStatus) ReportStart() {
+	s.StartTime = time.Now()
+}
+
+func (s *ChannelStatus) ReportAdd(delta int) {
+	s.Length += delta
+}
+
+func (s *ChannelStatus) ReportClose() {
+	s.StopTime = time.Now()
+}
diff --git a/util/channel_util.go b/util/channel_util.go
new file mode 100644
index 0000000..c032876
--- /dev/null
+++ b/util/channel_util.go
@@ -0,0 +1,35 @@
+package util
+
+import (
+	"reflect"
+	"sync"
+)
+
+func MergeChannel(cs []chan reflect.Value) (out chan reflect.Value) {
+	out = make(chan reflect.Value)
+	MergeChannelTo(cs, nil, out)
+	return out
+}
+
+func MergeChannelTo(cs []chan reflect.Value, transformFn func(reflect.Value) reflect.Value, out chan reflect.Value) {
+	var wg sync.WaitGroup
+
+	for _, c := range cs {
+		wg.Add(1)
+		go func(c chan reflect.Value) {
+			defer wg.Done()
+			for n := range c {
+				if transformFn != nil {
+					n = transformFn(n)
+				}
+				out <- n
+			}
+		}(c)
+	}
+
+	go func() {
+		wg.Wait()
+		close(out)
+	}()
+	return
+}