8292592: JFR test TestNative is not reliable due to low rate of sampling.

Reviewed-by: egahlin, shade

Author: robehn

…k/jdk/jfr/event/sampling/TestNative.java …/jdk/jfr/event/profiling/TestNative.javatest/jdk/jdk/jfr/event/sampling/TestNative.java renamed to test/jdk/jdk/jfr/event/profiling/TestNative.java test/jdk/jdk/jfr/event/sampling/TestNative.java renamed to test/jdk/jdk/jfr/event/profiling/TestNative.java

@@ -21,15 +21,11 @@
  * questions.
  */
 
-package jdk.jfr.event.sampling;
+package jdk.jfr.event.profiling;
 
 import java.time.Duration;
-import java.util.List;
-import java.util.concurrent.Semaphore;
-import java.util.concurrent.atomic.AtomicInteger;
 
 import jdk.jfr.Recording;
-import jdk.jfr.consumer.RecordedFrame;
 import jdk.jfr.consumer.RecordingStream;
 import jdk.jfr.internal.JVM;
 import jdk.test.lib.jfr.EventNames;
@@ -40,20 +36,17 @@
  * @requires vm.hasJFR
  * @library /test/lib
  * @modules jdk.jfr/jdk.jfr.internal
- * @run main jdk.jfr.event.sampling.TestNative
+ * @run main jdk.jfr.event.profiling.TestNative
  */
 public class TestNative {
 
     final static String NATIVE_EVENT = EventNames.NativeMethodSample;
 
     static volatile boolean alive = true;
 
-    // Please resist the temptation to speed up the test by decreasing
-    // the period. It is explicity set to 1100 ms to provoke the 1000 ms
-    // threshold in the JVM for os::naked_short_sleep().
     public static void main(String[] args) throws Exception {
         try (RecordingStream rs = new RecordingStream()) {
-            rs.enable(NATIVE_EVENT).withPeriod(Duration.ofMillis(1100));
+            rs.enable(NATIVE_EVENT).withPeriod(Duration.ofMillis(1));
             rs.onEvent(NATIVE_EVENT, e -> {
                 alive = false;
                 rs.close();

test/jdk/jdk/jfr/event/profiling/TestSamplingLongPeriod.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2017, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.jfr.event.profiling;
+
+import java.time.Duration;
+
+import jdk.jfr.consumer.RecordingStream;
+import jdk.test.lib.jfr.EventNames;
+import jdk.test.lib.jfr.RecurseThread;
+
+/*
+ * @test
+ * @key jfr
+ * @requires vm.hasJFR
+ * @library /test/lib
+ * @modules jdk.jfr/jdk.jfr.internal
+ * @run main jdk.jfr.event.profiling.TestSamplingLongPeriod
+ */
+public class TestSamplingLongPeriod {
+
+    final static String SAMPLE_EVENT = EventNames.ExecutionSample;
+
+    // The period is set to 1100 ms to provoke the 1000 ms
+    // threshold in the JVM for os::naked_short_sleep().
+    public static void main(String[] args) throws Exception {
+        RecurseThread t = new RecurseThread(50);
+        t.setDaemon(true);
+        try (RecordingStream rs = new RecordingStream()) {
+            rs.enable(SAMPLE_EVENT).withPeriod(Duration.ofMillis(1100));
+            rs.onEvent(SAMPLE_EVENT, e -> {
+                t.quit();
+                rs.close();
+            });
+            t.start();
+            rs.start();
+        }
+    }
+}