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.
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.java.lang.invoke;
24
25 import org.openjdk.jmh.annotations.Benchmark;
26 import org.openjdk.jmh.annotations.BenchmarkMode;
27 import org.openjdk.jmh.annotations.Mode;
28 import org.openjdk.jmh.annotations.OutputTimeUnit;
29 import org.openjdk.jmh.annotations.Scope;
30 import org.openjdk.jmh.annotations.State;
31
32 import java.lang.invoke.ConstantCallSite;
33 import java.lang.invoke.MethodHandle;
34 import java.lang.invoke.MethodHandles;
35 import java.lang.invoke.MethodType;
36 import java.lang.invoke.MutableCallSite;
37 import java.lang.invoke.VolatileCallSite;
38 import java.util.concurrent.TimeUnit;
39
40 /**
41 * This benchmark evaluates INDY performance when call sites are not changed.
42 */
43 @BenchmarkMode(Mode.AverageTime)
44 @OutputTimeUnit(TimeUnit.NANOSECONDS)
45 @State(Scope.Thread)
46 public class CallSiteStable {
47
48 /*
49 * Implementation notes:
50 * - Test is calling simple method via INDY
51 * - Additional baseline includes "raw" test, calling target method directly in virtual and static modes
52 */
53
54 private static java.lang.invoke.CallSite cs;
55
56 private static MethodHandle doCallMH;
57
58 static {
59 try {
60 doCallMH = MethodHandles.lookup().findVirtual(CallSiteStable.class, "doCall", MethodType.methodType(int.class, int.class));
61 } catch (NoSuchMethodException | IllegalAccessException e) {
62 throw new IllegalStateException(e);
63 }
64 }
65
66 private int i;
67
68 public int doCall(int value) {
69 return value + 1;
70 }
71
72 public static int doCallStatic(int value) {
73 return value + 1;
74 }
75
76 @Benchmark
77 public void baselineVirtual() {
78 i = doCall(i);
79 }
80
81 @Benchmark
82 public void baselineStatic() {
83 i = doCallStatic(i);
84 }
85
86 @Benchmark
87 public void testConstant() throws Throwable {
88 i = (int) INDY_Constant().invokeExact(this, i);
89 }
90
91 @Benchmark
92 public void testMutable() throws Throwable {
93 i = (int) INDY_Mutable().invokeExact(this, i);
94 }
95
96 @Benchmark
97 public void testVolatile() throws Throwable {
98 i = (int) INDY_Volatile().invokeExact(this, i);
99 }
100
101 /* =========================== INDY TRAMPOLINES ============================== */
102
103 private static MethodType MT_bsm() {
104 shouldNotCallThis();
105 return MethodType.methodType(java.lang.invoke.CallSite.class, MethodHandles.Lookup.class, String.class, MethodType.class);
106 }
107
108 private static MethodHandle MH_bsm_Constant() throws ReflectiveOperationException {
109 shouldNotCallThis();
110 return MethodHandles.lookup().findStatic(MethodHandles.lookup().lookupClass(), "bsm_Constant", MT_bsm());
111 }
112
113 private static MethodHandle MH_bsm_Mutable() throws ReflectiveOperationException {
114 shouldNotCallThis();
115 return MethodHandles.lookup().findStatic(MethodHandles.lookup().lookupClass(), "bsm_Mutable", MT_bsm());
116 }
117
118 private static MethodHandle MH_bsm_Volatile() throws ReflectiveOperationException {
119 shouldNotCallThis();
120 return MethodHandles.lookup().findStatic(MethodHandles.lookup().lookupClass(), "bsm_Volatile", MT_bsm());
121 }
122
123 private static MethodHandle INDY_Constant() throws Throwable {
124 shouldNotCallThis();
125 return ((java.lang.invoke.CallSite) MH_bsm_Constant().invoke(MethodHandles.lookup(), "doCall", MethodType.methodType(int.class, CallSiteStable.class, int.class))).dynamicInvoker();
126 }
127 private static MethodHandle INDY_Mutable() throws Throwable {
128 shouldNotCallThis();
129 return ((java.lang.invoke.CallSite) MH_bsm_Mutable().invoke(MethodHandles.lookup(), "doCall", MethodType.methodType(int.class, CallSiteStable.class, int.class))).dynamicInvoker();
130 }
131 private static MethodHandle INDY_Volatile() throws Throwable {
132 shouldNotCallThis();
133 return ((java.lang.invoke.CallSite) MH_bsm_Volatile().invoke(MethodHandles.lookup(), "doCall", MethodType.methodType(int.class, CallSiteStable.class, int.class))).dynamicInvoker();
134 }
135
136 public static java.lang.invoke.CallSite bsm_Constant(MethodHandles.Lookup lookup, String name, MethodType type) {
137 synchronized (CallSiteStable.class) {
138 if (cs == null)
139 cs = new ConstantCallSite(doCallMH);
140 return cs;
141 }
142 }
143
144 public static java.lang.invoke.CallSite bsm_Mutable(MethodHandles.Lookup lookup, String name, MethodType type) {
145 synchronized (CallSiteStable.class) {
146 if (cs == null)
147 cs = new MutableCallSite(doCallMH);
148 return cs;
149 }
150 }
151
152 public static java.lang.invoke.CallSite bsm_Volatile(MethodHandles.Lookup lookup, String name, MethodType type) {
153 synchronized (CallSiteStable.class) {
154 if (cs == null)
155 cs = new VolatileCallSite(doCallMH);
156 return cs;
157 }
158 }
159
160 private static void shouldNotCallThis() {
161 // if this gets called, the transformation has not taken place
162 throw new AssertionError("this code should be statically transformed away by Indify");
163 }
164
165 }