1 /*
 2  * Copyright (c) 2016, 2025, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.
 8  *
 9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 package org.openjdk.bench.valhalla.ackermann;
24 
25 import org.openjdk.jmh.annotations.BenchmarkMode;
26 import org.openjdk.jmh.annotations.Fork;
27 import org.openjdk.jmh.annotations.Measurement;
28 import org.openjdk.jmh.annotations.Mode;
29 import org.openjdk.jmh.annotations.OutputTimeUnit;
30 import org.openjdk.jmh.annotations.Scope;
31 import org.openjdk.jmh.annotations.State;
32 import org.openjdk.jmh.annotations.Warmup;
33 
34 import java.util.concurrent.TimeUnit;
35 
36 @Fork(3)
37 @Warmup(iterations = 5, time = 1)
38 @Measurement(iterations = 5, time = 1)
39 @OutputTimeUnit(TimeUnit.NANOSECONDS)
40 @BenchmarkMode(Mode.AverageTime)
41 @State(Scope.Thread)
42 public abstract class AckermannBase {
43 
44     // ackermann(1,1748) + ackermann(2,1897) + ackermann(3,8) == 9999999 invocations
45     // max depth - 3798
46     public static final int X1 = 1;
47     public static final int Y1 = 1748;
48     public static final int X2 = 2;
49     public static final int Y2 = 1897;
50     public static final int X3 = 3;
51     public static final int Y3 = 8;
52 
53     public static final int OPI = 9999999;
54 
55 }