8247776: JFR: TestThreadContextSwitches.java failed "RuntimeException: No events: expected false, was true"

test/jdk/jdk/jfr/event/os/TestThreadContextSwitches.java

@@ -28,6 +28,7 @@
 import jdk.jfr.consumer.RecordedEvent;
 import jdk.test.lib.jfr.EventNames;
 import jdk.test.lib.jfr.Events;
+import jdk.test.lib.Platform;
 
 /**
  * @test
@@ -40,15 +41,25 @@ public class TestThreadContextSwitches {
     private final static String EVENT_NAME = EventNames.ThreadContextSwitchRate;
 
     public static void main(String[] args) throws Throwable {
-        Recording recording = new Recording();
-        recording.enable(EVENT_NAME);
-        recording.start();
-        recording.stop();
-        List<RecordedEvent> events = Events.fromRecording(recording);
-        Events.hasEvents(events);
-        for (RecordedEvent event : events) {
-            System.out.println("Event: " + event);
-            Events.assertField(event, "switchRate").atLeast(0.0f);
+        while (true) {
+            try (Recording recording = new Recording()) {
+                recording.enable(EVENT_NAME);
+                recording.start();
+                recording.stop();
+                List<RecordedEvent> events = Events.fromRecording(recording);
+                if (!events.isEmpty()) {
+                    for (RecordedEvent event : events) {
+                        System.out.println("Event: " + event);
+                        Events.assertField(event, "switchRate").atLeast(0.0f);
+                    }
+                    return;
+                }
+                // Thread context switch rate is unreliable on Windows because
+                // the way processes are identified with performance counters.
+                if (!Platform.isWindows()) {
+                    Events.hasEvents(events);
+                }
+            }
         }
     }
 }