test/hotspot/jtreg/gc/stress/jfr/TestStressBigAllocationGCEventsWithG1.java
changeset 57942 e29b6ddfd9f4
parent 51214 67736b4846a0
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/gc/stress/jfr/TestStressBigAllocationGCEventsWithG1.java	Thu Aug 29 08:35:31 2019 -0700
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2015, 2018, 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.event.gc.detailed;
+
+/**
+ * @test
+ * @summary Test allocates humongous objects with G1 GC. Objects
+ * considered humongous when it allocates equals or more than one region. As
+ * we're passing the size of byte array we need adjust it that entire structure
+ * fits exactly to one region, if not - G1 will allocate another almost empty
+ * region as a continue of humongous. Thus we will exhaust memory very fast and
+ * test will fail with OOME.
+ * @requires vm.hasJFR
+ * @requires vm.gc == "null" | vm.gc == "G1"
+ * @library /test/lib /test/jdk
+ * @run main/othervm -XX:+UseG1GC -XX:MaxNewSize=5m -Xmx256m -XX:G1HeapRegionSize=1048576 jdk.jfr.event.gc.detailed.TestStressBigAllocationGCEventsWithG1 1048544
+ */
+public class TestStressBigAllocationGCEventsWithG1 {
+
+    public static void main(String[] args) throws Exception {
+        new StressAllocationGCEvents().run(args);
+    }
+}