1 /*
2 * Copyright (c) 2011, 2013, 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
24
25 /* @test
26 * @bug 7109837
27 * @summary Test Adler32/CRC32.update(ByteBuffer)
28 */
29
30 import java.util.*;
31 import java.util.zip.*;
32 import java.nio.*;
33
34 public class TimeChecksum {
35
36 static long time(Adler32 adler32, byte[] data, int iters, int len) {
37 long start_t = System.nanoTime();
38 for (int i = 0; i < iters; i++) {
39 adler32.reset();
40 adler32.update(data, 0, len);
41 }
42 long t = System.nanoTime() - start_t;
43 System.out.printf("%,12d", t / len);
44 return t;
45 }
46
47 static long time(Adler32 adler32, ByteBuffer buf, int iters) {
48 long start_t = System.nanoTime();
49 for (int i = 0; i < iters; i++) {
50 adler32.reset();
51 buf.mark();
52 adler32.update(buf);
53 buf.reset();
54 }
55 long t = System.nanoTime() - start_t;
56 System.out.printf("%,12d", t / buf.remaining());
57 return t;
58 }
59
60 static void testPosLimit(Adler32 adler32, ByteBuffer buf) {
61 int pos = buf.position();
62 int limit = buf.limit();
63 adler32.update(buf);
64 if (limit != buf.position() || limit != buf.limit()) {
65 System.out.printf("%nFAILED: pos,limit=(%d, %d), expected (%d, %d)%n",
66 buf.position(), buf.limit(), limit, limit);
67 throw new RuntimeException();
68 }
69 buf.position(pos);
70 }
71
72 static long time(CRC32 crc32, byte[] data, int iters, int len) {
73 long start_t = System.nanoTime();
74 for (int i = 0; i < iters; i++) {
75 crc32.reset();
76 crc32.update(data, 0, len);
77 }
78 long t = System.nanoTime() - start_t;
79 System.out.printf("%,12d", t / len);
80 return t;
81 }
82
83 static long time(CRC32 crc32, ByteBuffer buf, int iters) {
84 long start_t = System.nanoTime();
85 for (int i = 0; i < iters; i++) {
86 crc32.reset();
87 buf.mark();
88 crc32.update(buf);
89 buf.reset();
90 }
91 long t = System.nanoTime() - start_t;
92 System.out.printf("%,12d", t / buf.remaining());
93 return t;
94 }
95
96 static void testPosLimit(CRC32 crc32, ByteBuffer buf) {
97 int pos = buf.position();
98 int limit = buf.limit();
99 crc32.update(buf);
100 if (limit != buf.position() || limit != buf.limit()) {
101 System.out.printf("%nFAILED: pos,limit=(%d, %d), expected (%d, %d)%n",
102 buf.position(), buf.limit(), limit, limit);
103 throw new RuntimeException();
104 }
105 buf.position(pos);
106 }
107
108 public static void main(String[] args) {
109 int len = 1024 * 32;
110 int iters = 1;
111 if (args.length != 0 && "-benchmark".equals(args[0]))
112 iters = 100000;
113 Adler32 adler32 = new Adler32();
114 CRC32 crc32 = new CRC32();
115 Random rdm = new Random();
116 byte[] data = new byte[len];
117 new Random().nextBytes(data);
118 ByteBuffer buf;
119
120 System.out.println("---------- Adler32 ----------");
121 System.out.print("Warmup...");
122 time(adler32, data, iters, len);
123 time(adler32, data, 2*iters, 16); // warmup short case, too
124 time(adler32, ByteBuffer.wrap(data), iters);
125 buf = ByteBuffer.allocateDirect(len);
126 buf.put(data, 0, len);
127 buf.flip();
128 time(adler32, buf, iters);
129 System.out.println("\n");
130
131 System.out.println("Length byte[](ns/len) ByteBuffer(direct) ByteBuffer");
132 for (int testlen = 1; testlen < data.length; testlen <<= 1) {
133 System.out.print(testlen + "\t");
134 long baT = time(adler32, data, iters, testlen);
135 long baV = adler32.getValue();
136 System.out.print("\t");
137
138 buf = ByteBuffer.allocateDirect(testlen);
139 buf.put(data, 0, testlen);
140 buf.flip();
141 long bbdT = time(adler32, buf, iters);
142 long bbdV = adler32.getValue();
143 if (baV != bbdV) {
144 System.out.printf("%nFAILED: baV=%x,bbdV=%x%n", baV, bbdV);
145 throw new RuntimeException();
146 }
147 System.out.printf(" (%.2f)", (float)bbdT/baT);
148 testPosLimit(adler32, buf);
149
150 buf = ByteBuffer.allocate(testlen);
151 buf.put(data, 0, testlen);
152 buf.flip();
153 long bbT = time(adler32, buf, iters);
154 long bbV = adler32.getValue();
155 if (baV != bbV) {
156 System.out.printf("%nFAILED: baV=%x,bbV=%x%n", baV, bbV);
157 throw new RuntimeException();
158 }
159 testPosLimit(adler32, buf);
160 System.out.printf(" (%.2f) checksum=%x%n", (float)bbT/baT, bbV);
161 }
162
163 System.out.println("\n---------- CRC32 ----------");
164 System.out.print("Warmup...");
165 time(crc32, data, iters, len);
166 time(crc32, data, 2*iters, 16); // warmup short case, too
167 time(crc32, ByteBuffer.wrap(data), iters);
168 buf = ByteBuffer.allocateDirect(len);
169 buf.put(data, 0, len);
170 buf.flip();
171 time(crc32, buf, iters);
172 System.out.println("\n");
173
174
175 System.out.println("Length byte[](ns/len) ByteBuffer(direct) ByteBuffer");
176 for (int testlen = 1; testlen < data.length; testlen <<= 1) {
177 System.out.print(testlen + "\t");
178 long baT = time(crc32, data, iters, testlen);
179 long baV = crc32.getValue();
180 System.out.print("\t");
181
182 buf = ByteBuffer.allocateDirect(testlen);
183 buf.put(data, 0, testlen);
184 buf.flip();
185 long bbdT = time(crc32, buf, iters);
186 long bbdV = crc32.getValue();
187 if (baV != bbdV) {
188 System.out.printf("%nFAILED: baV=%x,bbdV=%x%n", baV, bbdV);
189 throw new RuntimeException();
190 }
191 System.out.printf(" (%.2f)", (float)bbdT/baT);
192 testPosLimit(crc32, buf);
193
194 buf = ByteBuffer.allocate(testlen);
195 buf.put(data, 0, testlen);
196 buf.flip();
197 long bbT = time(crc32, buf, iters);
198 long bbV = crc32.getValue();
199 if (baV != bbV) {
200 System.out.printf("%nFAILED: baV=%x,bbV=%x%n", baV, bbV);
201 throw new RuntimeException();
202 }
203 testPosLimit(crc32, buf);
204 System.out.printf(" (%.2f) checksum=%x%n", (float)bbT / baT, bbV);
205 }
206 }
207 }