1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
/*
* Copyright (c) 2008, 2009, 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 6834246 6842687
* @summary Stress test connections through the loopback interface
* @run main StressLoopback
* @run main/othervm -Djdk.net.useFastTcpLoopback StressLoopback
* @key randomness
*/
import java.nio.ByteBuffer;
import java.net.*;
import java.nio.channels.*;
import java.util.Random;
import java.io.IOException;
public class StressLoopback {
static final Random rand = new Random();
public static void main(String[] args) throws Exception {
// setup listener
AsynchronousServerSocketChannel listener =
AsynchronousServerSocketChannel.open().bind(new InetSocketAddress(0));
int port =((InetSocketAddress)(listener.getLocalAddress())).getPort();
InetAddress lh = InetAddress.getLocalHost();
SocketAddress remote = new InetSocketAddress(lh, port);
// create sources and sinks
int count = 2 + rand.nextInt(9);
Source[] source = new Source[count];
Sink[] sink = new Sink[count];
for (int i=0; i<count; i++) {
AsynchronousSocketChannel ch = AsynchronousSocketChannel.open();
ch.connect(remote).get();
source[i] = new Source(ch);
sink[i] = new Sink(listener.accept().get());
}
// start the sinks and sources
for (int i=0; i<count; i++) {
sink[i].start();
source[i].start();
}
// let the test run for a while
Thread.sleep(20*1000);
// wait until everyone is done
boolean failed = false;
long total = 0L;
for (int i=0; i<count; i++) {
long nwrote = source[i].finish();
long nread = sink[i].finish();
if (nread != nwrote)
failed = true;
System.out.format("%d -> %d (%s)\n",
nwrote, nread, (failed) ? "FAIL" : "PASS");
total += nwrote;
}
if (failed)
throw new RuntimeException("Test failed - see log for details");
System.out.format("Total sent %d MB\n", total / (1024L * 1024L));
}
/**
* Writes bytes to a channel until "done". When done the channel is closed.
*/
static class Source {
private final AsynchronousByteChannel channel;
private final ByteBuffer sentBuffer;
private volatile long bytesSent;
private volatile boolean finished;
Source(AsynchronousByteChannel channel) {
this.channel = channel;
int size = 1024 + rand.nextInt(10000);
this.sentBuffer = (rand.nextBoolean()) ?
ByteBuffer.allocateDirect(size) : ByteBuffer.allocate(size);
}
void start() {
sentBuffer.position(0);
sentBuffer.limit(sentBuffer.capacity());
channel.write(sentBuffer, (Void)null, new CompletionHandler<Integer,Void> () {
public void completed(Integer nwrote, Void att) {
bytesSent += nwrote;
if (finished) {
closeUnchecked(channel);
} else {
sentBuffer.position(0);
sentBuffer.limit(sentBuffer.capacity());
channel.write(sentBuffer, (Void)null, this);
}
}
public void failed(Throwable exc, Void att) {
exc.printStackTrace();
closeUnchecked(channel);
}
});
}
long finish() {
finished = true;
waitUntilClosed(channel);
return bytesSent;
}
}
/**
* Read bytes from a channel until EOF is received.
*/
static class Sink {
private final AsynchronousByteChannel channel;
private final ByteBuffer readBuffer;
private volatile long bytesRead;
Sink(AsynchronousByteChannel channel) {
this.channel = channel;
int size = 1024 + rand.nextInt(10000);
this.readBuffer = (rand.nextBoolean()) ?
ByteBuffer.allocateDirect(size) : ByteBuffer.allocate(size);
}
void start() {
channel.read(readBuffer, (Void)null, new CompletionHandler<Integer,Void> () {
public void completed(Integer nread, Void att) {
if (nread < 0) {
closeUnchecked(channel);
} else {
bytesRead += nread;
readBuffer.clear();
channel.read(readBuffer, (Void)null, this);
}
}
public void failed(Throwable exc, Void att) {
exc.printStackTrace();
closeUnchecked(channel);
}
});
}
long finish() {
waitUntilClosed(channel);
return bytesRead;
}
}
static void waitUntilClosed(Channel c) {
while (c.isOpen()) {
try {
Thread.sleep(100);
} catch (InterruptedException ignore) { }
}
}
static void closeUnchecked(Channel c) {
try {
c.close();
} catch (IOException ignore) { }
}
}
|
