--- /dev/null	2018-06-17 23:18:20.806999507 +0800
+++ new/test/jdk/jfr/api/recording/event/TestThreshold.java	2019-01-29 11:02:08.225228243 +0800
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2018, 2019, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.api.recording.event;
+
+import java.time.Duration;
+import java.util.List;
+
+import jdk.jfr.Event;
+import jdk.jfr.Recording;
+import jdk.jfr.consumer.RecordedEvent;
+import jdk.testlibrary.Asserts;
+import jdk.testlibrary.jfr.Events;
+
+/*
+ * @test
+ * @summary Test event threshold.
+ * @key jfr
+ * @library /lib/testlibrary
+ * @run main/othervm jdk.jfr.api.recording.event.TestThreshold
+ */
+public class TestThreshold {
+
+    public static void main(String[] args) throws Throwable {
+        Recording r = new Recording();
+
+        r.start();
+        r.enable(MyEvent.class).withThreshold(Duration.ofMillis(500));
+        createEvent(0, 100);
+        createEvent(1, 600);
+        createEvent(2, 100);
+        r.stop();
+
+        List<RecordedEvent> events = Events.fromRecording(r);
+        Asserts.assertTrue(1 <= events.size(), "Should get at most 1 event");
+        r.close();
+    }
+
+    private static void createEvent(int id, long duration) throws Exception {
+        MyEvent event = new MyEvent(id);
+        long start = System.currentTimeMillis();
+
+        event.begin();
+        sleepUntil(start + duration);
+        event.end();
+
+        long actualDuration = System.currentTimeMillis() - start;
+        System.out.printf("targetDuration=%d, actualDuration=%d, shouldCommit=%b%n",
+        duration, actualDuration, event.shouldCommit());
+        event.commit();
+    }
+
+    private static void sleepUntil(long endTime) throws Exception {
+        long sleepTime = endTime - System.currentTimeMillis();
+        while(sleepTime > 0) {
+            Thread.sleep(sleepTime);
+            sleepTime = endTime - System.currentTimeMillis();
+        }
+    }
+
+    static class MyEvent extends Event {
+        public int id;
+        public MyEvent(int id) {
+            this.id = id;
+        }
+    }
+
+}