0N/A/*
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0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
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0N/A */
0N/A
0N/A/* @test
0N/A * @bug 4863423
0N/A * @summary Test Util caching policy
0N/A */
0N/A
0N/Aimport java.io.*;
0N/Aimport java.nio.*;
0N/Aimport java.nio.channels.*;
0N/A
0N/Apublic class BigReadWrite {
0N/A
0N/A static int testSize = 15;
0N/A
0N/A public static void main(String[] args) throws Exception {
0N/A // One platform suffices to check for this bug
0N/A String osName = System.getProperty("os.name");
0N/A if (!osName.startsWith("SunOS"))
0N/A return;
0N/A
0N/A FileOutputStream fos = new FileOutputStream("/dev/zero");
0N/A FileChannel fc = fos.getChannel();
0N/A
0N/A // Three small writes to fill up the Util cache
0N/A ByteBuffer buf = ByteBuffer.allocate(900);
0N/A fc.write(buf);
0N/A buf = ByteBuffer.allocate(950);
0N/A fc.write(buf);
0N/A buf = ByteBuffer.allocate(975);
0N/A fc.write(buf);
0N/A buf = ByteBuffer.allocate(4419000);
0N/A
0N/A // Now initiate large write to create larger direct buffers
0N/A long iterations = 0;
0N/A while (iterations < 50) {
0N/A fc.write(buf);
0N/A buf.rewind();
0N/A iterations++;
0N/A }
0N/A // Clean up
0N/A fc.close();
0N/A }
0N/A}