--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/gc/epsilon/TestMemoryMXBeans.java	Mon Nov 06 18:53:38 2017 +0100
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2017 Red Hat, Inc. and/or its affiliates.
+ *
+ * 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.
+ *
+ */
+
+/**
+ * @test TestMemoryMXBeans
+ * @key gc
+ * @summary Test JMX memory beans
+ * @modules java.base/jdk.internal.misc
+ *          java.management
+ * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+UseEpsilonGC          -Xmx1g TestMemoryMXBeans   -1 1024
+ * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+UseEpsilonGC -Xms1g   -Xmx1g TestMemoryMXBeans 1024 1024
+ * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+UseEpsilonGC -Xms128m -Xmx1g TestMemoryMXBeans  128 1024
+ */
+
+import java.lang.management.*;
+import java.util.*;
+
+public class TestMemoryMXBeans {
+
+    static volatile Object sink;
+
+    public static void main(String[] args) throws Exception {
+        if (args.length < 2) {
+            throw new IllegalStateException("Should provide expected heap sizes");
+        }
+
+        long initSize = 1L * Integer.parseInt(args[0]) * 1024 * 1024;
+        long maxSize =  1L * Integer.parseInt(args[1]) * 1024 * 1024;
+
+        testMemoryBean(initSize, maxSize);
+        testAllocs();
+    }
+
+    public static void testMemoryBean(long initSize, long maxSize) {
+        MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
+        long heapInit = memoryMXBean.getHeapMemoryUsage().getInit();
+        long heapMax = memoryMXBean.getHeapMemoryUsage().getMax();
+        long nonHeapInit = memoryMXBean.getNonHeapMemoryUsage().getInit();
+        long nonHeapMax = memoryMXBean.getNonHeapMemoryUsage().getMax();
+
+        if (initSize > 0 && heapInit != initSize) {
+            throw new IllegalStateException("Init heap size is wrong: " + heapInit + " vs " + initSize);
+        }
+        if (maxSize > 0 && heapMax != maxSize) {
+            throw new IllegalStateException("Max heap size is wrong: " + heapMax + " vs " + maxSize);
+        }
+    }
+
+    public static void testAllocs() {
+        MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
+        long heapUsed1 = memoryMXBean.getHeapMemoryUsage().getUsed();
+        sink = new int[1024*1024];
+        long heapUsed2 = memoryMXBean.getHeapMemoryUsage().getUsed();
+
+        long diff = heapUsed2 - heapUsed1;
+        if (!(8 + 4*1024*1024 <= diff && diff <= 16 + 4*1024*1024)) {
+           throw new IllegalStateException("Allocation did not change used space right: " + diff);
+        }
+    }
+
+}