--- /dev/null	2015-01-17 02:57:05.640001672 +0300
+++ new/test/gc/logging/GCTask.java	2015-01-20 17:14:16.073399906 +0300
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+
+/**
+ * This is a helper class that forces the garbage collecting process. It
+ * attempts to consume all memory available to the young generation by
+ * creating a lot of unreferenced objects. Sooner or later the garbage
+ * collector shall be invoked.
+ *
+ * For purposes of performance the task is implemented to be ran with 
+ * a small memory size less or equal to 128 megabytes. This shall be
+ * excplicitly specified with -Xmx JVM's option. In case if this option
+ * is not specified it's not guaranteed that GC will be invoked.
+ *
+ * The class is intended to be used with -Xloggc option to provide diagnostics
+ * output which can be parsed by the real tests.
+ *
+ * The class is implemented as an alternative to the explicit call to 
+ * System.gc(). The second has some drawbacks and should be avoided.
+ */
+public class GCTask {
+    
+    public static final int BLOCK_SIZE = 16 * 1024; // 16 kilobytes
+    public static final int MAX_ITERATIONS = 8192; // 16K * 8K = 128M
+    public static byte[] garbage;
+
+    @SuppressWarnings("unused")
+    public void run() {
+        // ensure there's an object that will survive garbage collecting
+        byte[] survivor = new byte[BLOCK_SIZE];
+
+        // if -Xmx has not been specified we assume that we're working within
+        // 128 megabytes of memory
+        long iterCount = Math.min(Runtime.getRuntime().maxMemory() / BLOCK_SIZE,
+            MAX_ITERATIONS);
+        while (iterCount-- > 1) {
+            // make an object that will be eligible for garbage collecting
+            garbage = new byte[BLOCK_SIZE];
+        }
+    }
+    
+    public static void main(String[] args) {
+        new GCTask().run();
+    }
+
+}