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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* 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
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*
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* 2 along with this work; if not, write to the Free Software Foundation,
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/* @test
* @bug 4863423
* @summary Test Util caching policy
*/
import java.io.*;
import java.nio.*;
import java.nio.channels.*;
public class BigReadWrite {
static int testSize = 15;
public static void main(String[] args) throws Exception {
// One platform suffices to check for this bug
String osName = System.getProperty("os.name");
if (!osName.startsWith("SunOS"))
return;
FileOutputStream fos = new FileOutputStream("/dev/zero");
FileChannel fc = fos.getChannel();
// Three small writes to fill up the Util cache
ByteBuffer buf = ByteBuffer.allocate(900);
fc.write(buf);
buf = ByteBuffer.allocate(950);
fc.write(buf);
buf = ByteBuffer.allocate(975);
fc.write(buf);
buf = ByteBuffer.allocate(4419000);
// Now initiate large write to create larger direct buffers
long iterations = 0;
while (iterations < 50) {
fc.write(buf);
buf.rewind();
iterations++;
}
// Clean up
fc.close();
}
}