--- /dev/null	2015-11-11 00:08:33.433730035 +0300
+++ new/test/gc/g1/plab/lib/AppPLABResize.java	2015-11-17 19:17:56.116865914 +0300
@@ -0,0 +1,110 @@
+/*
+ * 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.
+ */
+package gc.g1.plab.lib;
+
+import jdk.test.lib.Platform;
+import sun.hotspot.WhiteBox;
+
+/**
+ * An simple application a part of PLAB Resize test to be executed in the VM under tests.
+ * The application allocates objects in 3 iterations:
+ * 1. Objects of fixed size
+ * 2. Objects of decreasing size
+ * 3. Objects of increasing size
+ * The application doesn't have any assumptions about expected behavior.
+ * It's supposed to be executed a test which suppose to setup test parameters (object sizes, number of allocations, etc)
+ * and VM flags including flags turning GC logging on. The test will then check the produced log.
+ */
+final public class AppPLABResize {
+
+    // Memory to be promoted by PLAB for one thread.
+    private static final long MEM_ALLOC_WORDS = 32768;
+    // Defined by properties.
+    private static final int ITERATIONS = Integer.getInteger("iterations");
+    private static final long CHUNK = Long.getLong("chunk.size");
+    private static final int THREADS = Integer.getInteger("threads");
+
+    private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
+
+    /**
+     * Main method for AppPLABResizing. Application expect for next properties:
+     * iterations, chunk.size and threads.
+     *
+     * @param args
+     */
+    public static void main(String[] args) {
+
+        if (ITERATIONS == 0 || CHUNK == 0 || THREADS == 0) {
+            throw new IllegalArgumentException("Properties should be set");
+        }
+
+        long wordSize = Platform.is32bit() ? 4l : 8l;
+        // PLAB size is shared between threads.
+        long initialMemorySize = wordSize * THREADS * MEM_ALLOC_WORDS;
+
+        // Expect changing memory to half during all iterations.
+        long memChangeStep = initialMemorySize / 2 / ITERATIONS;
+
+        WHITE_BOX.fullGC();
+
+        // Warm the PLAB. Fill memory ITERATIONS times without changing memory size.
+        iterateAllocation(initialMemorySize, 0);
+        // Fill memory ITERATIONS times.
+        // Initial size is initialMemorySize and step is -memChangeStep
+        iterateAllocation(initialMemorySize, -memChangeStep);
+        // Fill memory ITERATIONS times.
+        // Initial size is memoryAfterChanging, step is memChangeStep.
+        // Memory size at start should be greater then last size on previous step.
+        // Last size on previous step is initialMemorySize - memChangeStep*(ITERATIONS - 1)
+        long memoryAfterChanging = initialMemorySize - memChangeStep * (ITERATIONS - 2);
+        iterateAllocation(memoryAfterChanging, memChangeStep);
+    }
+
+    private static void iterateAllocation(long memoryToFill, long change) {
+        int items;
+        if (change > 0) {
+            items = (int) ((memoryToFill + change * ITERATIONS) / CHUNK) + 1;
+        } else {
+            items = (int) (memoryToFill / CHUNK) + 1;
+        }
+
+        long currentMemToFill = memoryToFill;
+        for (int iteration = 0; iteration < ITERATIONS; ++iteration) {
+
+            Storage storage = new Storage(items);
+            allocateYoung(storage, currentMemToFill);
+            // Promote all objects to survivor
+            WHITE_BOX.youngGC();
+            storage.clear();
+            currentMemToFill += change;
+        }
+    }
+
+    private static void allocateYoung(Storage storage, long memoryToFill) {
+        long allocated = 0;
+        while (allocated < memoryToFill) {
+            storage.store(new byte[(int) CHUNK]);
+            allocated += CHUNK;
+        }
+    }
+}