--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/micro/org/openjdk/bench/java/net/UnixSocketChannelReadWrite.java Tue Nov 05 15:10:00 2019 +0000
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2014 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.
+ */
+package org.openjdk.bench.java.net;
+
+import java.io.IOException;
+import java.net.StandardProtocolFamily;
+import java.nio.channels.UnixDomainSocketAddress;
+import java.nio.ByteBuffer;
+import java.nio.channels.ClosedChannelException;
+import java.nio.channels.ServerSocketChannel;
+import java.nio.channels.SocketChannel;
+import java.nio.file.*;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import org.openjdk.jmh.annotations.*;
+
+/**
+ * Tests the overheads of I/O API.
+ * This test is known to depend heavily on network conditions and paltform.
+ */
+@BenchmarkMode(Mode.Throughput)
+@OutputTimeUnit(TimeUnit.MILLISECONDS)
+@State(Scope.Thread)
+public class UnixSocketChannelReadWrite {
+
+ private ServerSocketChannel ssc;
+ private SocketChannel s1, s2;
+ private ReadThread rt;
+ private ByteBuffer bb = ByteBuffer.allocate(1);
+
+ private static volatile String tempDir;
+ private static final AtomicInteger count = new AtomicInteger(0);
+ private volatile Path socket;
+
+ static {
+ try {
+ Path p = Files.createTempDirectory("readWriteTest");
+ tempDir = p.toString();
+ } catch (IOException e) {
+ tempDir = null;
+ }
+ }
+
+ private ServerSocketChannel getServerSocketChannel() throws IOException {
+ int next = count.incrementAndGet();
+ socket = Paths.get(tempDir, Integer.toString(next));
+ UnixDomainSocketAddress addr = new UnixDomainSocketAddress(socket);
+ ServerSocketChannel c = ServerSocketChannel.open(StandardProtocolFamily.UNIX);
+ c.bind(addr);
+ return c;
+ }
+
+ @Setup(Level.Trial)
+ public void beforeRun() throws IOException {
+ ssc = getServerSocketChannel();
+ s1 = SocketChannel.open(ssc.getLocalAddress());
+ s2 = ssc.accept();
+
+ rt = new ReadThread(s2);
+ rt.start();
+
+ bb.put((byte) 47);
+ bb.flip();
+ }
+
+ @TearDown(Level.Trial)
+ public void afterRun() throws IOException, InterruptedException {
+ s1.close();
+ s2.close();
+ ssc.close();
+ Files.delete(socket);
+ Files.delete(Path.of(tempDir));
+ rt.join();
+ }
+
+ @Benchmark
+ public void test() throws IOException {
+ s1.write(bb);
+ bb.flip();
+ }
+
+ static class ReadThread extends Thread {
+ private SocketChannel sc;
+
+ public ReadThread(SocketChannel s2) {
+ this.sc = s2;
+ }
+
+ public void run() {
+ try {
+ ByteBuffer bb = ByteBuffer.allocate(1);
+ while (sc.read(bb) > 0) {
+ bb.flip();
+ }
+ } catch (ClosedChannelException ex) {
+ // shutdown time
+ } catch (IOException e) {
+ e.printStackTrace();
+ }
+ }
+ }
+
+}