1 /*
2 * Copyright (c) 2003, 2010, 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 /* @test
25 * @bug 4863423
26 * @summary Test Util caching policy
27 */
28
29 import java.io.*;
30 import java.nio.*;
31 import java.nio.channels.*;
32
33 public class BigReadWrite {
34
35 static int testSize = 15;
36
37 public static void main(String[] args) throws Exception {
38 // One platform suffices to check for this bug
39 String osName = System.getProperty("os.name");
40 if (!osName.startsWith("SunOS"))
41 return;
42
43 FileOutputStream fos = new FileOutputStream("/dev/zero");
44 FileChannel fc = fos.getChannel();
45
46 // Three small writes to fill up the Util cache
47 ByteBuffer buf = ByteBuffer.allocate(900);
48 fc.write(buf);
49 buf = ByteBuffer.allocate(950);
50 fc.write(buf);
51 buf = ByteBuffer.allocate(975);
52 fc.write(buf);
53 buf = ByteBuffer.allocate(4419000);
54
55 // Now initiate large write to create larger direct buffers
56 long iterations = 0;
57 while (iterations < 50) {
58 fc.write(buf);
59 buf.rewind();
60 iterations++;
61 }
62 // Clean up
|
1 /*
2 * Copyright (c) 2003, 2020, 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 /* @test
25 * @requires os.family == "Linux"
26 * @bug 4863423
27 * @summary Test Util caching policy
28 */
29
30 import java.io.*;
31 import java.nio.*;
32 import java.nio.channels.*;
33
34 public class BigReadWrite {
35
36 static int testSize = 15;
37
38 public static void main(String[] args) throws Exception {
39 FileOutputStream fos = new FileOutputStream("/dev/zero");
40 FileChannel fc = fos.getChannel();
41
42 // Three small writes to fill up the Util cache
43 ByteBuffer buf = ByteBuffer.allocate(900);
44 fc.write(buf);
45 buf = ByteBuffer.allocate(950);
46 fc.write(buf);
47 buf = ByteBuffer.allocate(975);
48 fc.write(buf);
49 buf = ByteBuffer.allocate(4419000);
50
51 // Now initiate large write to create larger direct buffers
52 long iterations = 0;
53 while (iterations < 50) {
54 fc.write(buf);
55 buf.rewind();
56 iterations++;
57 }
58 // Clean up
|