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

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Reviewed-by: mgronlun
This commit is contained in:
Erik Gahlin 2025-10-07 15:38:58 +00:00
parent 8a20656ed0
commit eb729f0aaa
1 changed files with 20 additions and 9 deletions
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29
test/jdk/jdk/jfr/event/os/TestThreadContextSwitches.java
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@ -28,6 +28,7 @@ import jdk.jfr.Recording;
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);
}
}
}
}
}