--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/gc/g1/plab/lib/MemoryConsumer.java	Wed Jan 27 18:22:25 2016 +0300
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2016, 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;
+
+/**
+ * The MemoryConsumer is used for consuming different amount of memory.
+ * Class will store not more than 'capacity' number of objects with 'chunk' size.
+ * If we exceed capacity, object will be stored at existing entries,
+ * all previously added objects will be overwritten.
+ * If capacity=1, only last object will be saved.
+ */
+public class MemoryConsumer {
+
+    private int capacity;
+    private int chunk;
+
+    private Object[] array;
+    private int index;
+
+    /**
+     * Create MemoryConsumer object with defined capacity
+     *
+     * @param capacity
+     * @param chunk
+     */
+    public MemoryConsumer(int capacity, int chunk) {
+        if (capacity <= 0) {
+            throw new IllegalArgumentException("Items number should be greater than 0.");
+        }
+        if (chunk <= 0) {
+            throw new IllegalArgumentException("Chunk size should be greater than 0.");
+        }
+        this.capacity = capacity;
+        this.chunk = chunk;
+        index = 0;
+        array = new Object[this.capacity];
+    }
+
+    /**
+     * Store object into MemoryConsumer.
+     *
+     * @param o - Object to store
+     */
+    private void store(Object o) {
+        if (array == null) {
+            throw new RuntimeException("Capacity should be set before storing");
+        }
+        array[index % capacity] = o;
+        ++index;
+    }
+
+    public void consume(long memoryToFill) {
+        long allocated = 0;
+        while (allocated < memoryToFill) {
+            store(new byte[chunk]);
+            allocated += chunk;
+        }
+    }
+
+    /**
+     * Clear all stored objects.
+     */
+    public void clear() {
+        array = null;
+    }
+}