fix test

go.mod

@@ -24,7 +24,7 @@ require (
 	github.com/prometheus/client_golang v0.9.2
 	github.com/remyoudompheng/bigfft v0.0.0-20190321074620-2f0d2b0e0001 // indirect
 	github.com/samuel/go-zookeeper v0.0.0-20180130194729-c4fab1ac1bec // indirect
-	github.com/shirou/gopsutil v2.18.12+incompatible // indirect
+	github.com/shirou/gopsutil v2.18.12+incompatible
 	github.com/siddontang/go v0.0.0-20180604090527-bdc77568d726
 	github.com/sirupsen/logrus v1.4.1
 	github.com/stretchr/testify v1.3.0

pkg/stat/sys/cpu/psutilCPU_test.go

@@ -11,8 +11,9 @@ func Test_PsutilCPU(t *testing.T) {
 	if err != nil {
 		t.Fatalf("newPsutilCPU failed!err:=%v", err)
 	}
+	time.Sleep(time.Millisecond * 600)
 	for i := 0; i < 6; i++ {
-		time.Sleep(time.Millisecond * 500)
+		time.Sleep(time.Millisecond * 600)
 		u, err := cpu.Usage()
 		if u == 0 {
 			t.Fatalf("get cpu from psutil failed!cpu usage is zero!err:=%v", err)