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