test/micro/org/openjdk/bench/java/net/NetworkInterfaceLookup.java
changeset 55596 d01b345865d7
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/micro/org/openjdk/bench/java/net/NetworkInterfaceLookup.java	Fri Jul 05 13:40:29 2019 +0200
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2019, 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 org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Fork;
+import org.openjdk.jmh.annotations.Measurement;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.Warmup;
+
+import java.lang.reflect.Method;
+import java.net.InetAddress;
+import java.net.NetworkInterface;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Assess time to perform native NetworkInterface lookups; uses
+ * reflection to access both package-private isBoundInetAddress and
+ * public getByInetAddress (to get comparable numbers)
+ */
+@BenchmarkMode(Mode.Throughput)
+@OutputTimeUnit(TimeUnit.SECONDS)
+@State(Scope.Thread)
+@Fork(2)
+@Warmup(iterations = 5, time = 2)
+@Measurement(iterations = 10, time = 2)
+public class NetworkInterfaceLookup {
+
+    static final InetAddress address = InetAddress.getLoopbackAddress();
+
+    static final Method isBoundInetAddress_method;
+
+    static final Method getByInetAddress_method;
+
+    static {
+        Method isBound = null;
+        Method getByInet = null;
+
+        try {
+            isBound = NetworkInterface.class.getDeclaredMethod("isBoundInetAddress", InetAddress.class);
+            isBound.setAccessible(true);
+        } catch (Exception e) {
+            System.out.println("NetworkInterface.isBoundInetAddress not found");
+        }
+
+        try {
+            getByInet = NetworkInterface.class.getDeclaredMethod("getByInetAddress", InetAddress.class);
+        } catch (Exception e) {
+            System.out.println("NetworkInterface.getByInetAddress not found");
+        }
+        isBoundInetAddress_method = isBound;
+        getByInetAddress_method = getByInet;
+    }
+
+    @Benchmark
+    public boolean bound() throws Exception {
+        return (boolean)isBoundInetAddress_method.invoke(null, address);
+    }
+
+    @Benchmark
+    public NetworkInterface getByInetAddress() throws Exception {
+        return (NetworkInterface)getByInetAddress_method.invoke(null, address);
+    }
+}