return loading run status to frontend to fix a couple of bugs

tb_plugin/fe/src/api/generated/api.ts

@@ -596,6 +596,25 @@ export interface Performance {
    */
   children?: Array<Performance>
 }
+/**
+ *
+ * @export
+ * @interface Runs
+ */
+export interface Runs {
+  /**
+   *
+   * @type {Array<string>}
+   * @memberof Runs
+   */
+  runs: Array<string>
+  /**
+   *
+   * @type {boolean}
+   * @memberof Runs
+   */
+  loading: boolean
+}
 /**
  *
  * @export
@@ -2162,7 +2181,7 @@ export const DefaultApiFp = function (configuration?: Configuration) {
      */
     runsGet(
       options?: any
-    ): (fetch?: FetchAPI, basePath?: string) => Promise<Array<string>> {
+    ): (fetch?: FetchAPI, basePath?: string) => Promise<Runs> {
       const localVarFetchArgs = DefaultApiFetchParamCreator(
         configuration
       ).runsGet(options)

tb_plugin/fe/src/api/openapi.yaml

@@ -13,9 +13,7 @@ paths:
           content:
             '*/*':
               schema:
-                type: array
-                items:
-                  type: string
+                $ref: '#/components/schemas/Runs'
   /views:
     get:
       parameters:
@@ -453,6 +451,18 @@ paths:
                 type: object
 components:
   schemas:
+    Runs:
+      type: object
+      required:
+        - runs
+        - loading
+      properties:
+        runs:
+          type: array
+          items:
+            type: string
+        loading:
+          type: boolean
     Performance:
       type: object
       required:

tb_plugin/fe/src/app.tsx

@@ -2,6 +2,9 @@
  * Copyright (c) Microsoft Corporation. All rights reserved.
  *--------------------------------------------------------------------------------------------*/
 
+import Card from '@material-ui/core/Card'
+import CardContent from '@material-ui/core/CardContent'
+import CardHeader from '@material-ui/core/CardHeader'
 import ClickAwayListener from '@material-ui/core/ClickAwayListener'
 import CssBaseline from '@material-ui/core/CssBaseline'
 import Divider from '@material-ui/core/Divider'
@@ -15,6 +18,7 @@ import Select, { SelectProps } from '@material-ui/core/Select'
 import { makeStyles } from '@material-ui/core/styles'
 import ChevronLeftIcon from '@material-ui/icons/ChevronLeft'
 import ChevronRightIcon from '@material-ui/icons/ChevronRight'
+import Typography from '@material-ui/core/Typography'
 import 'antd/es/button/style/css'
 import 'antd/es/list/style/css'
 import 'antd/es/table/style/css'
@@ -130,6 +134,7 @@ export const App = () => {
 
   const [run, setRun] = React.useState<string>('')
   const [runs, setRuns] = React.useState<string[]>([])
+  const [runsLoading, setRunsLoading] = React.useState(true)
 
   const [workers, setWorkers] = React.useState<string[]>([])
   const [worker, setWorker] = React.useState<string>('')
@@ -152,7 +157,8 @@ export const App = () => {
     while (true) {
       try {
         const runs = await api.defaultApi.runsGet()
-        setRuns(runs)
+        setRuns(runs.runs)
+        setRunsLoading(runs.loading)
       } catch (e) {
         console.info('Cannot fetch runs: ', e)
       }
@@ -248,6 +254,17 @@ export const App = () => {
   }
 
   const renderContent = () => {
+    if (!runsLoading && runs.length == 0) {
+      return (
+        <Card variant="outlined">
+          <CardHeader title="No Runs Found"></CardHeader>
+          <CardContent>
+            <Typography>There are not any runs in the log folder.</Typography>
+          </CardContent>
+        </Card>
+      )
+    }
+
     if (!loaded || !run || !worker || !view || !span) {
       return <FullCircularProgress />
     }

tb_plugin/test/test_tensorboard_end2end.py

@@ -112,15 +112,22 @@ def _test_tensorboard(self, host, port, expected_runs, path_prefix):
             try:
                 response = urllib.request.urlopen(run_link)
                 data = response.read()
-                if data == expected_runs:
+                runs = None
+                if data:
+                    data = json.loads(data)
+                    runs = data.get("runs")
+                    if runs:
+                        runs = '[{}]'.format(", ".join(['"{}"'.format(i) for i in runs]))
+                        runs = runs.encode('utf-8')
+                if runs == expected_runs:
                     break
                 if retry_times % 10 == 0:
                     print("receive mismatched data, retrying", data)
                 time.sleep(2)
                 retry_times -= 1
                 if retry_times<0:
                     self.fail("Load run timeout")
-            except Exception:
+            except Exception as e:
                 if retry_times > 0:
                     continue
                 else:

tb_plugin/torch_tb_profiler/plugin.py

@@ -49,8 +49,8 @@ def __init__(self, context):
             mp.set_start_method(start_method, force=True)
         self.logdir = io.abspath(context.logdir.rstrip('/'))
 
-        self._is_active = None
-        self._is_active_initialized_event = threading.Event()
+        self._load_lock = threading.Lock()
+        self._load_threads = []
 
         self._runs = OrderedDict()
         self._runs_lock = threading.Lock()
@@ -76,8 +76,7 @@ def clean():
     def is_active(self):
         """Returns whether there is relevant data for the plugin to process.
         """
-        self._is_active_initialized_event.wait()
-        return self._is_active
+        return True
 
     def get_plugin_apps(self):
         return {
@@ -104,13 +103,21 @@ def get_plugin_apps(self):
         }
 
     def frontend_metadata(self):
-        return base_plugin.FrontendMetadata(es_module_path="/index.js")
+        return base_plugin.FrontendMetadata(es_module_path="/index.js", disable_reload=True)
 
     @wrappers.Request.application
     def runs_route(self, request):
         with self._runs_lock:
             names = list(self._runs.keys())
-        return self.respond_as_json(names)
+
+        with self._load_lock:
+            loading = bool(self._load_threads)
+
+        data = {
+            "runs": names,
+            "loading": loading
+        }
+        return self.respond_as_json(data)
 
     @wrappers.Request.application
     def views_route(self, request):
@@ -130,7 +137,6 @@ def workers_route(self, request):
         self._validate(run=name, view=view)
         run = self._get_run(name)
         self._check_run(run, name)
-        workers = run.get_workers(view)
         return self.respond_as_json(run.get_workers(view))
 
     @wrappers.Request.application
@@ -305,19 +311,22 @@ def _monitor_runs(self):
                     logger.debug("Scan run dir")
                     run_dirs = self._get_run_dirs()
 
+                    has_dir = False
                     # Assume no deletion on run directories, trigger async load if find a new run
                     for run_dir in run_dirs:
-                        # Set _is_active quickly based on file pattern match, don't wait for data loading
-                        if not self._is_active:
-                            self._is_active = True
-                            self._is_active_initialized_event.set()
-
+                        has_dir = True
                         if run_dir not in touched:
                             touched.add(run_dir)
                             logger.info("Find run directory %s", run_dir)
                             # Use threading to avoid UI stall and reduce data parsing time
                             t = threading.Thread(target=self._load_run, args=(run_dir,))
                             t.start()
+                            with self._load_lock:
+                                self._load_threads.append(t)
+
+                    if not has_dir:
+                        # handle directory removed case.
+                        self._runs.clear()
                 except Exception as ex:
                     logger.warning("Failed to scan runs. Exception=%s", ex, exc_info=True)
 
@@ -338,11 +347,6 @@ def _receive_runs(self):
                 if is_new:
                     self._runs = OrderedDict(sorted(self._runs.items()))
 
-                # Update is_active
-                if not self._is_active:
-                    self._is_active = True
-                    self._is_active_initialized_event.set()
-
     def _get_run_dirs(self):
         """Scan logdir, find PyTorch Profiler run directories.
         A directory is considered to be a run if it contains 1 or more *.pt.trace.json[.gz].
@@ -371,6 +375,13 @@ def _load_run(self, run_dir):
         except Exception as ex:
             logger.warning("Failed to load run %s. Exception=%s", ex, name, exc_info=True)
 
+        t = threading.current_thread()
+        with self._load_lock:
+            try:
+                self._load_threads.remove(t)
+            except ValueError:
+                logger.warning("could not find the thread {}".format(run_dir))
+
     def _get_run(self, name) -> Run:
         with self._runs_lock:
             return self._runs.get(name, None)