1 /*
2 * Copyright (c) 2014 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package org.openjdk.bench.java.lang.invoke;
26
27 import org.openjdk.jmh.annotations.Benchmark;
28 import org.openjdk.jmh.annotations.BenchmarkMode;
29 import org.openjdk.jmh.annotations.Mode;
30 import org.openjdk.jmh.annotations.OutputTimeUnit;
31 import org.openjdk.jmh.annotations.Scope;
32 import org.openjdk.jmh.annotations.State;
33
34 import java.lang.invoke.ConstantCallSite;
35 import java.lang.invoke.MethodHandle;
36 import java.lang.invoke.MethodHandles;
37 import java.lang.invoke.MethodType;
38 import java.lang.invoke.MutableCallSite;
39 import java.lang.invoke.VolatileCallSite;
40 import java.util.concurrent.TimeUnit;
41
42 /**
43 * This benchmark evaluates INDY performance when call sites are not changed.
44 */
45 @BenchmarkMode(Mode.AverageTime)
46 @OutputTimeUnit(TimeUnit.NANOSECONDS)
47 @State(Scope.Thread)
48 public class CallSiteStable {
49
50 /*
51 * Implementation notes:
52 * - Test is calling simple method via INDY
53 * - Additional baseline includes "raw" test, calling target method directly in virtual and static modes
54 */
55
56 private static java.lang.invoke.CallSite cs;
57
58 private static MethodHandle doCallMH;
59
60 static {
61 try {
62 doCallMH = MethodHandles.lookup().findVirtual(CallSiteStable.class, "doCall", MethodType.methodType(int.class, int.class));
63 } catch (NoSuchMethodException | IllegalAccessException e) {
64 throw new IllegalStateException(e);
65 }
66 }
67
68 private int i;
69
70 public int doCall(int value) {
71 return value + 1;
72 }
73
74 public static int doCallStatic(int value) {
75 return value + 1;
76 }
77
78 @Benchmark
79 public void baselineVirtual() {
80 i = doCall(i);
81 }
82
83 @Benchmark
84 public void baselineStatic() {
85 i = doCallStatic(i);
86 }
87
88 @Benchmark
89 public void testConstant() throws Throwable {
90 i = (int) INDY_Constant().invokeExact(this, i);
91 }
92
93 @Benchmark
94 public void testMutable() throws Throwable {
95 i = (int) INDY_Mutable().invokeExact(this, i);
96 }
97
98 @Benchmark
99 public void testVolatile() throws Throwable {
100 i = (int) INDY_Volatile().invokeExact(this, i);
101 }
102
103 /* =========================== INDY TRAMPOLINES ============================== */
104
105 private static MethodType MT_bsm() {
106 shouldNotCallThis();
107 return MethodType.methodType(java.lang.invoke.CallSite.class, MethodHandles.Lookup.class, String.class, MethodType.class);
108 }
109
110 private static MethodHandle MH_bsm_Constant() throws ReflectiveOperationException {
111 shouldNotCallThis();
112 return MethodHandles.lookup().findStatic(MethodHandles.lookup().lookupClass(), "bsm_Constant", MT_bsm());
113 }
114
115 private static MethodHandle MH_bsm_Mutable() throws ReflectiveOperationException {
116 shouldNotCallThis();
117 return MethodHandles.lookup().findStatic(MethodHandles.lookup().lookupClass(), "bsm_Mutable", MT_bsm());
118 }
119
120 private static MethodHandle MH_bsm_Volatile() throws ReflectiveOperationException {
121 shouldNotCallThis();
122 return MethodHandles.lookup().findStatic(MethodHandles.lookup().lookupClass(), "bsm_Volatile", MT_bsm());
123 }
124
125 private static MethodHandle INDY_Constant() throws Throwable {
126 shouldNotCallThis();
127 return ((java.lang.invoke.CallSite) MH_bsm_Constant().invoke(MethodHandles.lookup(), "doCall", MethodType.methodType(int.class, CallSiteStable.class, int.class))).dynamicInvoker();
128 }
129 private static MethodHandle INDY_Mutable() throws Throwable {
130 shouldNotCallThis();
131 return ((java.lang.invoke.CallSite) MH_bsm_Mutable().invoke(MethodHandles.lookup(), "doCall", MethodType.methodType(int.class, CallSiteStable.class, int.class))).dynamicInvoker();
132 }
133 private static MethodHandle INDY_Volatile() throws Throwable {
134 shouldNotCallThis();
135 return ((java.lang.invoke.CallSite) MH_bsm_Volatile().invoke(MethodHandles.lookup(), "doCall", MethodType.methodType(int.class, CallSiteStable.class, int.class))).dynamicInvoker();
136 }
137
138 public static java.lang.invoke.CallSite bsm_Constant(MethodHandles.Lookup lookup, String name, MethodType type) {
139 synchronized (CallSiteStable.class) {
140 if (cs == null)
141 cs = new ConstantCallSite(doCallMH);
142 return cs;
143 }
144 }
145
146 public static java.lang.invoke.CallSite bsm_Mutable(MethodHandles.Lookup lookup, String name, MethodType type) {
147 synchronized (CallSiteStable.class) {
148 if (cs == null)
149 cs = new MutableCallSite(doCallMH);
150 return cs;
151 }
152 }
153
154 public static java.lang.invoke.CallSite bsm_Volatile(MethodHandles.Lookup lookup, String name, MethodType type) {
155 synchronized (CallSiteStable.class) {
156 if (cs == null)
157 cs = new VolatileCallSite(doCallMH);
158 return cs;
159 }
160 }
161
162 private static void shouldNotCallThis() {
163 // if this gets called, the transformation has not taken place
164 throw new AssertionError("this code should be statically transformed away by Indify");
165 }
166
167 }