--- a/src/share/classes/java/util/concurrent/ForkJoinUtils.java	Sun Sep 23 18:52:42 2012 -0400
+++ b/src/share/classes/java/util/concurrent/ForkJoinUtils.java	Mon Sep 24 00:47:56 2012 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 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
@@ -51,6 +51,20 @@
 
     private ForkJoinUtils() {}; // no construction
 
+    public static int suggestDepth(long s) {
+        long leafSize = suggestTargetSize(s);
+        int d = 0;
+        while (s > leafSize) {
+            s /= 2;
+            ++d;
+        }
+        return d;
+    }
+
+    public static long suggestTargetSize(long s) {
+        return 1 + ((s + 7) >>> 3) / defaultFJPool().getParallelism();
+    }
+
     /**
      * The exception thrown if initialization of the
      * {@link #defaultFJPool default ForkJoinPool}