--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/gc/g1/TestHumongousAllocInitialMark.java	Tue Oct 15 11:38:47 2013 +0200
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2012, 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.
+ */
+
+/*
+ * @test TestHumongousAllocInitialMark
+ * @bug 7168848
+ * @summary G1: humongous object allocations should initiate marking cycles when necessary
+ * @library /testlibrary
+ */
+
+import com.oracle.java.testlibrary.*;
+
+public class TestHumongousAllocInitialMark {
+    private static final int heapSize                       = 200; // MB
+    private static final int heapRegionSize                 = 1;   // MB
+    private static final int initiatingHeapOccupancyPercent = 50;  // %
+
+    public static void main(String[] args) throws Exception {
+        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+            "-XX:+UseG1GC",
+            "-Xms" + heapSize + "m",
+            "-Xmx" + heapSize + "m",
+            "-XX:G1HeapRegionSize=" + heapRegionSize + "m",
+            "-XX:InitiatingHeapOccupancyPercent=" + initiatingHeapOccupancyPercent,
+            "-XX:+PrintGC",
+            HumongousObjectAllocator.class.getName());
+
+        OutputAnalyzer output = new OutputAnalyzer(pb.start());
+        output.shouldContain("GC pause (G1 Humongous Allocation) (young) (initial-mark)");
+        output.shouldNotContain("Full GC");
+        output.shouldHaveExitValue(0);
+    }
+
+    static class HumongousObjectAllocator {
+        private static byte[] dummy;
+
+        public static void main(String [] args) throws Exception {
+            // Make object size 75% of region size
+            final int humongousObjectSize =
+                (int)(heapRegionSize * 1024 * 1024 * 0.75);
+
+            // Number of objects to allocate to go above IHOP
+            final int humongousObjectAllocations =
+                (int)((heapSize * initiatingHeapOccupancyPercent / 100.0) / heapRegionSize) + 1;
+
+            // Allocate
+            for (int i = 1; i <= humongousObjectAllocations; i++) {
+                System.out.println("Allocating humongous object " + i + "/" + humongousObjectAllocations +
+                                   " of size " + humongousObjectSize + " bytes");
+                dummy = new byte[humongousObjectSize];
+            }
+        }
+    }
+}
+