Reduce cgroups read frequency to avoid kernel kernfs clock pressure

Signed-off-by: xigang <wangxigang2014@gmail.com>

Author: xigang

manager/manager.go

@@ -541,8 +541,10 @@ func (m *manager) GetContainerInfoV2(containerName string, options v2.RequestOpt
 }
 
 func (m *manager) containerDataToContainerInfo(cont *containerData, query *info.ContainerInfoRequest) (*info.ContainerInfo, error) {
-	// Get the info from the container.
-	cinfo, err := cont.GetInfo(true)
+	// Get the info from the container. When GetInfo is set to false,
+	// it reads cgroups once every 5 seconds and gets data from containerData cache at other times,
+	// reducing the frequency of reading cgroups to avoid kernel kernfs clock pressure that could cause Linux machine to hang
+	cinfo, err := cont.GetInfo(false)
 	if err != nil {
 		return nil, err
 	}

manager/manager_test.go

@@ -65,6 +65,10 @@ func createManagerAndAddContainers(
 			spec,
 			nil,
 		).Once()
+		mockHandler.On("ListContainers", container.ListSelf).Return(
+			[]info.ContainerReference(nil),
+			nil,
+		).Once()
 		cont, err := newContainerData(name, memoryCache, mockHandler, false, &collector.GenericCollectorManager{}, 60*time.Second, true, clock.NewFakeClock(time.Now()))
 		if err != nil {
 			t.Fatal(err)
@@ -181,10 +185,6 @@ func expectManagerWithContainers(containers []string, query *info.ContainerInfoR
 			}
 			spec := cinfo.Spec
 
-			h.On("ListContainers", container.ListSelf).Return(
-				[]info.ContainerReference(nil),
-				nil,
-			)
 			h.On("GetSpec").Return(
 				spec,
 				nil,