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Lana Steuck
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205
jdk/test/java/util/zip/TimeChecksum.java
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205
jdk/test/java/util/zip/TimeChecksum.java
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/*
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* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @bug 7109837
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* @summary Test Adler32/CRC32.update(ByteBuffer)
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*/
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import java.util.*;
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import java.util.zip.*;
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import java.nio.*;
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public class TimeChecksum {
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static long time(Adler32 adler32, byte[] data, int iters, int len) {
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long start_t = System.nanoTime();
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for (int i = 0; i < iters; i++) {
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adler32.reset();
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adler32.update(data, 0, len);
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}
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long t = System.nanoTime() - start_t;
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System.out.printf("%,12d", t / len);
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return t;
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}
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static long time(Adler32 adler32, ByteBuffer buf, int iters) {
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long start_t = System.nanoTime();
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for (int i = 0; i < iters; i++) {
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adler32.reset();
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buf.mark();
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adler32.update(buf);
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buf.reset();
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}
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long t = System.nanoTime() - start_t;
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System.out.printf("%,12d", t / buf.remaining());
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return t;
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}
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static void testPosLimit(Adler32 adler32, ByteBuffer buf) {
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int pos = buf.position();
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int limit = buf.limit();
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adler32.update(buf);
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if (limit != buf.position() || limit != buf.limit()) {
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System.out.printf("%nFAILED: pos,limit=(%d, %d), expected (%d, %d)%n",
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buf.position(), buf.limit(), limit, limit);
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throw new RuntimeException();
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}
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buf.position(pos);
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}
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static long time(CRC32 crc32, byte[] data, int iters, int len) {
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long start_t = System.nanoTime();
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for (int i = 0; i < iters; i++) {
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crc32.reset();
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crc32.update(data, 0, len);
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}
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long t = System.nanoTime() - start_t;
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System.out.printf("%,12d", t / len);
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return t;
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}
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static long time(CRC32 crc32, ByteBuffer buf, int iters) {
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long start_t = System.nanoTime();
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for (int i = 0; i < iters; i++) {
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crc32.reset();
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buf.mark();
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crc32.update(buf);
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buf.reset();
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}
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long t = System.nanoTime() - start_t;
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System.out.printf("%,12d", t / buf.remaining());
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return t;
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}
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static void testPosLimit(CRC32 crc32, ByteBuffer buf) {
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int pos = buf.position();
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int limit = buf.limit();
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crc32.update(buf);
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if (limit != buf.position() || limit != buf.limit()) {
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System.out.printf("%nFAILED: pos,limit=(%d, %d), expected (%d, %d)%n",
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buf.position(), buf.limit(), limit, limit);
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throw new RuntimeException();
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}
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buf.position(pos);
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}
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public static void main(String[] args) {
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int len = 1024 * 32;
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int iters = 1;
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if (args.length != 0 && "-benchmark".equals(args[0]))
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iters = 100000;
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Adler32 adler32 = new Adler32();
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CRC32 crc32 = new CRC32();
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Random rdm = new Random();
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byte[] data = new byte[len];
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new Random().nextBytes(data);
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ByteBuffer buf;
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System.out.println("---------- Adler32 ----------");
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System.out.print("Warmup...");
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time(adler32, data, iters, len);
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time(adler32, ByteBuffer.wrap(data), iters);
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buf = ByteBuffer.allocateDirect(len);
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buf.put(data, 0, len);
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buf.flip();
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time(adler32, buf, iters);
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System.out.println("\n");
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System.out.println("Length byte[](ns/len) ByteBuffer(direct) ByteBuffer");
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for (int testlen = 1; testlen < data.length; testlen <<= 1) {
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System.out.print(testlen + "\t");
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long baT = time(adler32, data, iters, testlen);
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long baV = adler32.getValue();
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System.out.print("\t");
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buf = ByteBuffer.allocateDirect(testlen);
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buf.put(data, 0, testlen);
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buf.flip();
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long bbdT = time(adler32, buf, iters);
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long bbdV = adler32.getValue();
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if (baV != bbdV) {
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System.out.printf("%nFAILED: baV=%x,bbdV=%x%n", baV, bbdV);
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throw new RuntimeException();
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}
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System.out.printf(" (%.2f)", (float)bbdT/baT);
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testPosLimit(adler32, buf);
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buf = ByteBuffer.allocate(testlen);
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buf.put(data, 0, testlen);
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buf.flip();
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long bbT = time(adler32, buf, iters);
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long bbV = adler32.getValue();
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if (baV != bbV) {
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System.out.printf("%nFAILED: baV=%x,bbV=%x%n", baV, bbV);
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throw new RuntimeException();
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}
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testPosLimit(adler32, buf);
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System.out.printf(" (%.2f) checksum=%x%n", (float)bbT/baT, bbV);
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}
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System.out.println("\n---------- CRC32 ----------");
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System.out.print("Warmup...");
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time(crc32, data, iters, len);
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time(crc32, ByteBuffer.wrap(data), iters);
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buf = ByteBuffer.allocateDirect(len);
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buf.put(data, 0, len);
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buf.flip();
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time(crc32, buf, iters);
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System.out.println("\n");
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System.out.println("Length byte[](ns/len) ByteBuffer(direct) ByteBuffer");
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for (int testlen = 1; testlen < data.length; testlen <<= 1) {
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System.out.print(testlen + "\t");
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long baT = time(crc32, data, iters, testlen);
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long baV = crc32.getValue();
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System.out.print("\t");
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buf = ByteBuffer.allocateDirect(testlen);
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buf.put(data, 0, testlen);
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buf.flip();
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long bbdT = time(crc32, buf, iters);
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long bbdV = crc32.getValue();
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if (baV != bbdV) {
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System.out.printf("%nFAILED: baV=%x,bbdV=%x%n", baV, bbdV);
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throw new RuntimeException();
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}
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System.out.printf(" (%.2f)", (float)bbdT/baT);
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testPosLimit(crc32, buf);
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buf = ByteBuffer.allocate(testlen);
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buf.put(data, 0, testlen);
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buf.flip();
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long bbT = time(crc32, buf, iters);
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long bbV = crc32.getValue();
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if (baV != bbV) {
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System.out.printf("%nFAILED: baV=%x,bbV=%x%n", baV, bbV);
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throw new RuntimeException();
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}
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testPosLimit(crc32, buf);
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System.out.printf(" (%.2f) checksum=%x%n", (float)bbT / baT, bbV);
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}
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}
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}
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