8245194: Unix domain socket channel implementation

Reviewed-by: erikj, dfuchs, alanb, chegar

test/micro/org/openjdk/bench/java/net/SocketChannelConnectionSetup.java

@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2020 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.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.StandardProtocolFamily;
+import java.net.UnixDomainSocketAddress;
+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.*;
+import org.openjdk.jmh.runner.Runner;
+import org.openjdk.jmh.runner.RunnerException;
+import org.openjdk.jmh.runner.options.Options;
+import org.openjdk.jmh.runner.options.OptionsBuilder;
+
+/**
+ * Measures connection setup times
+ */
+@BenchmarkMode(Mode.SingleShotTime)
+@OutputTimeUnit(TimeUnit.MILLISECONDS)
+@State(Scope.Thread)
+public class SocketChannelConnectionSetup {
+
+    private ServerSocketChannel ssc;
+    private SocketChannel s1, s2;
+
+    private static volatile String tempDir;
+    private static final AtomicInteger count = new AtomicInteger(0);
+    private volatile Path socket;
+
+    @Param({"inet", "unix"})
+    private volatile String family;
+
+    static {
+        try {
+            Path p = Files.createTempDirectory("readWriteTest");
+            tempDir = p.toString();
+        } catch (IOException e) {
+            tempDir = null;
+        }
+    }
+
+    private ServerSocketChannel getServerSocketChannel() throws IOException {
+        if (family.equals("inet"))
+            return getInetServerSocketChannel();
+        else if (family.equals("unix"))
+            return getUnixServerSocketChannel();
+        throw new InternalError();
+    }
+
+
+    private ServerSocketChannel getInetServerSocketChannel() throws IOException {
+        InetAddress iaddr = InetAddress.getLoopbackAddress();
+        return ServerSocketChannel.open().bind(null);
+    }
+
+    private ServerSocketChannel getUnixServerSocketChannel() throws IOException {
+        int next = count.incrementAndGet();
+        socket = Paths.get(tempDir, Integer.toString(next));
+        UnixDomainSocketAddress addr = UnixDomainSocketAddress.of(socket);
+        return ServerSocketChannel.open(StandardProtocolFamily.UNIX).bind(addr);
+    }
+
+    @Setup(Level.Trial)
+    public void beforeRun() throws IOException {
+        ssc = getServerSocketChannel();
+    }
+
+    @TearDown(Level.Trial)
+    public void afterRun() throws IOException, InterruptedException {
+        ssc.close();
+        if (family.equals("unix")) {
+            Files.delete(socket);
+            Files.delete(Path.of(tempDir));
+        }
+    }
+
+    @Benchmark
+    @Measurement(iterations = 5, batchSize=200)
+    public void test() throws IOException {
+        s1 = SocketChannel.open(ssc.getLocalAddress());
+        s2 = ssc.accept();
+        s1.close();
+        s2.close();
+    }
+
+    public static void main(String[] args) throws RunnerException {
+        Options opt = new OptionsBuilder()
+                .include(org.openjdk.bench.java.net.SocketChannelConnectionSetup.class.getSimpleName())
+                .warmupForks(1)
+                .forks(2)
+                .build();
+
+        new Runner(opt).run();
+
+        opt = new OptionsBuilder()
+                .include(org.openjdk.bench.java.net.SocketChannelConnectionSetup.class.getSimpleName())
+                .jvmArgsPrepend("-Djdk.net.useFastTcpLoopback=true")
+                .warmupForks(1)
+                .forks(2)
+                .build();
+
+        new Runner(opt).run();
+    }
+}