diff --git a/go.mod b/go.mod
index 2e190aa..99f78e9 100644
--- a/go.mod
+++ b/go.mod
@@ -11,7 +11,7 @@ require (
 	github.com/go-ole/go-ole v1.2.4 // indirect
 	github.com/go-yaml/yaml v2.1.0+incompatible
 	github.com/iwind/TeaGo v0.0.0-20200923021120-f5d76441fe9e
-	github.com/shirou/gopsutil v2.20.7+incompatible
+	github.com/shirou/gopsutil v2.20.9+incompatible
 	golang.org/x/net v0.0.0-20200520004742-59133d7f0dd7
 	google.golang.org/grpc v1.32.0
 )
diff --git a/go.sum b/go.sum
index ae9144b..5329e7c 100644
--- a/go.sum
+++ b/go.sum
@@ -84,6 +84,8 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/shirou/gopsutil v2.20.7+incompatible h1:Ymv4OD12d6zm+2yONe39VSmp2XooJe8za7ngOLW/o/w=
 github.com/shirou/gopsutil v2.20.7+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA=
+github.com/shirou/gopsutil v2.20.9+incompatible h1:msXs2frUV+O/JLva9EDLpuJ84PrFsdCTCQex8PUdtkQ=
+github.com/shirou/gopsutil v2.20.9+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
diff --git a/internal/nodes/node_status_executor.go b/internal/nodes/node_status_executor.go
index 388979d..52b5039 100644
--- a/internal/nodes/node_status_executor.go
+++ b/internal/nodes/node_status_executor.go
@@ -87,7 +87,7 @@ func (this *NodeStatusExecutor) updateCPU(status *NodeStatus) {
 	}
 	percents, err := cpu.Percent(duration, false)
 	if err != nil {
-		status.Error = err.Error()
+		status.Error = "cpu.Percent(): " + err.Error()
 		return
 	}
 	if len(percents) == 0 {
@@ -100,12 +100,12 @@ func (this *NodeStatusExecutor) updateCPU(status *NodeStatus) {
 
 		status.CPULogicalCount, err = cpu.Counts(true)
 		if err != nil {
-			status.Error = err.Error()
+			status.Error = "cpu.Counts(): " + err.Error()
 			return
 		}
 		status.CPUPhysicalCount, err = cpu.Counts(false)
 		if err != nil {
-			status.Error = err.Error()
+			status.Error = "cpu.Counts(): " + err.Error()
 			return
 		}
 		this.cpuLogicalCount = status.CPULogicalCount
diff --git a/internal/nodes/node_status_executor_test.go b/internal/nodes/node_status_executor_test.go
new file mode 100644
index 0000000..56ff6ae
--- /dev/null
+++ b/internal/nodes/node_status_executor_test.go
@@ -0,0 +1,27 @@
+package nodes
+
+import (
+	"github.com/shirou/gopsutil/cpu"
+	"testing"
+	"time"
+)
+
+func TestNodeStatusExecutor_CPU(t *testing.T) {
+	countLogicCPU, err := cpu.Counts(true)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Log("logic count:", countLogicCPU)
+
+	countPhysicalCPU, err := cpu.Counts(false)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Log("physical count:", countPhysicalCPU)
+
+	percents, err := cpu.Percent(100 * time.Millisecond, false)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Log(percents)
+}