/*
* Copyright ( c ) 2005 , 2019 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
* 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 .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
* or visit www . oracle . com if you need additional information or have any
* questions .
*/
/**
* @ test
* @ bug 6348045 6341887 8231770
* @ summary GZipOutputStream / InputStream goes critical ( calls JNI_Get * Critical )
* and causes slowness . This test uses Deflater and Inflater directly .
* @ key randomness
* @ run main / othervm - Xcheck : jni FlaterTest
*/
import java.nio.*;
import java.util.*;
import java.util.zip.*;
/**
* This test runs Inflater and Defalter in a number of simultaneous threads ,
* validating that the deflated & then inflated data matches the original
* data .
*/
public class FlaterTest extends Thread {
private static final int DATA_LEN = 1024 * 128 ;
private static ByteBuffer dataDirect;
private static ByteBuffer dataHeap;
// If true, print extra info.
private static final boolean debug = false ;
// Set of Flater threads running.
private static Set<Flater> flaters =
Collections.synchronizedSet(new HashSet<>());
/** Fill in {@code data} with random values. */
static void createData() {
ByteBuffer bb = ByteBuffer.allocateDirect(DATA_LEN * 8 );
for (int i = 0 ; i < DATA_LEN * 8 ; i += 8 ) {
bb.putDouble(i, Math.random());
}
dataDirect = bb;
final ByteBuffer hb = ByteBuffer.allocate(bb.capacity());
hb.duplicate().put(bb.duplicate());
dataHeap = hb;
if (debug) System.out.println("data length is " + bb.capacity());
}
/** @return the length of the deflated {@code data}. */
private static int getDeflatedLength() {
Deflater deflater = new Deflater();
deflater.setInput(dataDirect.duplicate());
deflater.finish();
byte [] out = new byte [dataDirect.capacity()];
int rc = deflater.deflate(out);
deflater.end();
if (debug) System.out.println("deflatedLength is " + rc);
return rc;
}
/** Compares given bytes with those in {@code data}.
* @ throws Exception if given bytes don ' t match { @ code data } .
*/
private static void validate(ByteBuffer buf, int offset, int len) throws Exception {
for (int i = 0 ; i < len; i++ ) {
if (buf.get(i) != dataDirect.get(offset+i)) {
throw new Exception("mismatch at " + (offset + i));
}
}
}
public static void realMain(String[] args) {
int numThreads = args.length > 0 ? Integer.parseInt(args[0 ]) : 5 ;
createData();
for (int srcMode = 0 ; srcMode <= 2 ; srcMode ++) {
for (int dstMode = 0 ; dstMode <= 2 ; dstMode ++) {
new FlaterTest().go(numThreads, srcMode, dstMode);
}
}
}
private synchronized void go(int numThreads, int srcMode, int dstMode) {
int deflatedLength = getDeflatedLength();
long time = System.currentTimeMillis();
for (int i = 0 ; i < numThreads; i++) {
Flater f = new Flater(deflatedLength, srcMode, dstMode);
flaters.add(f);
f.start();
}
synchronized (flaters) {
while (flaters.size() != 0 ) {
try {
flaters.wait();
} catch (InterruptedException ex) {
unexpected(ex);
}
}
}
time = System.currentTimeMillis() - time;
System.out.println("Time needed for " + numThreads
+ " threads to deflate/inflate: " + time + " ms (srcMode=" +srcMode+",dstMode=" +dstMode+")" );
}
/** Deflates and inflates data. */
static class Flater extends Thread {
private final int deflatedLength;
private final int srcMode, dstMode;
private Flater(int length, int srcMode, int dstMode) {
this .deflatedLength = length;
this .srcMode = srcMode;
this .dstMode = dstMode;
}
/** Deflates and inflates {@code data}. */
public void run() {
if (debug) System.out.println(getName() + " starting run()" );
try {
ByteBuffer deflated = DeflateData(deflatedLength);
InflateData(deflated);
} catch (Throwable t) {
t.printStackTrace();
fail(getName() + " failed" );
} finally {
synchronized (flaters) {
flaters.remove(this );
if (flaters.isEmpty()) {
flaters.notifyAll();
}
}
}
}
/** Returns a copy of {@code data} in deflated form. */
private ByteBuffer DeflateData(int length) {
Deflater deflater = new Deflater();
if (srcMode == 0 ) {
deflater.setInput(dataHeap.array());
} else if (srcMode == 1 ) {
deflater.setInput(dataHeap.duplicate());
} else {
assert srcMode == 2 ;
deflater.setInput(dataDirect.duplicate());
}
deflater.finish();
ByteBuffer out = dstMode == 2 ? ByteBuffer.allocateDirect(length) : ByteBuffer.allocate(length);
int deflated;
if (dstMode == 0 ) {
deflated = deflater.deflate(out.array(), 0 , length);
out.position(deflated);
} else {
deflater.deflate(out);
}
out.flip();
return out;
}
/** Inflate a byte array, comparing it with {@code data} during
* inflation .
* @ throws Exception if inflated bytes don ' t match { @ code data } .
*/
private void InflateData(ByteBuffer bytes) throws Throwable {
Inflater inflater = new Inflater();
if (dstMode == 0 ) {
inflater.setInput(bytes.array(), 0 , bytes.remaining());
} else {
inflater.setInput(bytes);
}
if (inflater.getRemaining() == 0 ) {
throw new Exception("Nothing to inflate (bytes=" + bytes + ")" );
}
int len = 1024 * 8 ;
int offset = 0 ;
ByteBuffer buf = srcMode == 2 ? ByteBuffer.allocateDirect(len) : ByteBuffer.allocate(len);
while (inflater.getRemaining() > 0 ) {
buf.clear();
int inflated;
if (srcMode == 0 ) {
inflated = inflater.inflate(buf.array(), 0 , buf.remaining());
} else {
inflated = inflater.inflate(buf);
}
if (inflated == 0 ) {
throw new Exception("Nothing inflated (dst=" + buf + ",offset=" + offset + ",rem=" + inflater.getRemaining() + ",srcMode=" +srcMode+",dstMode=" +dstMode+")" );
}
validate(buf, offset, inflated);
offset += inflated;
}
}
}
//--------------------- Infrastructure ---------------------------
static volatile int passed = 0 , failed = 0 ;
static void pass() {passed++;}
static void fail() {failed++; Thread .dumpStack();}
static void fail(String msg) {System.out.println(msg); fail();}
static void unexpected(Throwable t) {failed++; t.printStackTrace();}
static void check(boolean cond) {if (cond) pass(); else fail();}
static void equal(Object x, Object y) {
if (x == null ? y == null : x.equals(y)) pass();
else fail(x + " not equal to " + y);}
public static void main(String[] args) throws Throwable {
try {realMain(args);} catch (Throwable t) {unexpected(t);}
System.out.println("\nPassed = " + passed + " failed = " + failed);
if (failed > 0 ) throw new AssertionError("Some tests failed" );}
}
Messung V0.5 in Prozent C=96 H=90 G=93
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-06-10)
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