| /* |
| * Copyright 2014 Open Networking Laboratory |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.onlab.nio; |
| |
| import com.google.common.collect.Lists; |
| import org.onlab.util.Counter; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.net.InetAddress; |
| import java.net.InetSocketAddress; |
| import java.net.SocketAddress; |
| import java.nio.channels.ByteChannel; |
| import java.nio.channels.SelectionKey; |
| import java.nio.channels.SocketChannel; |
| import java.text.DecimalFormat; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.FutureTask; |
| import java.util.concurrent.Semaphore; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| |
| import static java.lang.String.format; |
| import static java.lang.System.nanoTime; |
| import static java.lang.System.out; |
| import static org.onlab.nio.IOLoopTestServer.PORT; |
| import static org.onlab.util.Tools.delay; |
| import static org.onlab.util.Tools.namedThreads; |
| |
| /** |
| * Auxiliary test fixture to measure speed of NIO-based channels. |
| */ |
| public class IOLoopTestClient { |
| |
| private static Logger log = LoggerFactory.getLogger(IOLoopTestClient.class); |
| |
| private final InetAddress ip; |
| private final int port; |
| private final int msgCount; |
| private final int msgLength; |
| |
| private final List<CustomIOLoop> iloops = new ArrayList<>(); |
| private final ExecutorService ipool; |
| private final ExecutorService wpool; |
| |
| Counter messages; |
| Counter bytes; |
| long latencyTotal = 0; |
| long latencyCount = 0; |
| |
| |
| /** |
| * Main entry point to launch the client. |
| * |
| * @param args command-line arguments |
| * @throws java.io.IOException if unable to connect to server |
| * @throws InterruptedException if latch wait gets interrupted |
| * @throws java.util.concurrent.ExecutionException if wait gets interrupted |
| * @throws java.util.concurrent.TimeoutException if timeout occurred while waiting for completion |
| */ |
| public static void main(String[] args) |
| throws IOException, InterruptedException, ExecutionException, TimeoutException { |
| startStandalone(args); |
| |
| System.exit(0); |
| } |
| |
| /** |
| * Starts a standalone IO loop test client. |
| * |
| * @param args command-line arguments |
| */ |
| public static void startStandalone(String[] args) |
| throws IOException, InterruptedException, ExecutionException, TimeoutException { |
| InetAddress ip = InetAddress.getByName(args.length > 0 ? args[0] : "127.0.0.1"); |
| int wc = args.length > 1 ? Integer.parseInt(args[1]) : 6; |
| int mc = args.length > 2 ? Integer.parseInt(args[2]) : 50 * 1000000; |
| int ml = args.length > 3 ? Integer.parseInt(args[3]) : 128; |
| int to = args.length > 4 ? Integer.parseInt(args[4]) : 60; |
| |
| log.info("Setting up client with {} workers sending {} {}-byte messages to {} server... ", |
| wc, mc, ml, ip); |
| IOLoopTestClient client = new IOLoopTestClient(ip, wc, mc, ml, PORT); |
| |
| client.start(); |
| delay(500); |
| |
| client.await(to); |
| client.report(); |
| } |
| |
| /** |
| * Creates a speed client. |
| * |
| * @param ip ip address of server |
| * @param wc worker count |
| * @param mc message count to send per client |
| * @param ml message length in bytes |
| * @param port socket port |
| * @throws java.io.IOException if unable to create IO loops |
| */ |
| public IOLoopTestClient(InetAddress ip, int wc, int mc, int ml, int port) throws IOException { |
| this.ip = ip; |
| this.port = port; |
| this.msgCount = mc; |
| this.msgLength = ml; |
| this.wpool = Executors.newFixedThreadPool(wc, namedThreads("worker")); |
| this.ipool = Executors.newFixedThreadPool(wc, namedThreads("io-loop")); |
| |
| for (int i = 0; i < wc; i++) { |
| iloops.add(new CustomIOLoop()); |
| } |
| } |
| |
| /** |
| * Starts the client workers. |
| * |
| * @throws java.io.IOException if unable to open connection |
| */ |
| public void start() throws IOException { |
| messages = new Counter(); |
| bytes = new Counter(); |
| |
| // First start up all the IO loops |
| for (CustomIOLoop l : iloops) { |
| ipool.execute(l); |
| } |
| |
| // Wait for all of them to get going |
| for (CustomIOLoop l : iloops) { |
| l.awaitStart(1000); |
| } |
| |
| // ... and Next open all connections; one-per-loop |
| for (CustomIOLoop l : iloops) { |
| openConnection(l); |
| } |
| } |
| |
| |
| /** |
| * Initiates open connection request and registers the pending socket |
| * channel with the given IO loop. |
| * |
| * @param loop loop with which the channel should be registered |
| * @throws java.io.IOException if the socket could not be open or connected |
| */ |
| private void openConnection(CustomIOLoop loop) throws IOException { |
| SocketAddress sa = new InetSocketAddress(ip, port); |
| SocketChannel ch = SocketChannel.open(); |
| ch.configureBlocking(false); |
| loop.connectStream(ch); |
| ch.connect(sa); |
| } |
| |
| |
| /** |
| * Waits for the client workers to complete. |
| * |
| * @param secs timeout in seconds |
| * @throws java.util.concurrent.ExecutionException if execution failed |
| * @throws InterruptedException if interrupt occurred while waiting |
| * @throws java.util.concurrent.TimeoutException if timeout occurred |
| */ |
| public void await(int secs) throws InterruptedException, |
| ExecutionException, TimeoutException { |
| for (CustomIOLoop l : iloops) { |
| if (l.worker.task != null) { |
| l.worker.task.get(secs, TimeUnit.SECONDS); |
| latencyTotal += l.latencyTotal; |
| latencyCount += l.latencyCount; |
| } |
| } |
| messages.freeze(); |
| bytes.freeze(); |
| } |
| |
| /** |
| * Reports on the accumulated throughput and latency. |
| */ |
| public void report() { |
| DecimalFormat f = new DecimalFormat("#,##0"); |
| out.println(format("Client: %s messages; %s bytes; %s mps; %s MBs; %s ns latency", |
| f.format(messages.total()), f.format(bytes.total()), |
| f.format(messages.throughput()), |
| f.format(bytes.throughput() / (1024 * msgLength)), |
| f.format(latencyTotal / latencyCount))); |
| } |
| |
| |
| // Loop for transfer of fixed-length messages |
| private class CustomIOLoop extends IOLoop<TestMessage, TestMessageStream> { |
| |
| Worker worker = new Worker(); |
| long latencyTotal = 0; |
| long latencyCount = 0; |
| |
| |
| public CustomIOLoop() throws IOException { |
| super(500); |
| } |
| |
| |
| @Override |
| protected TestMessageStream createStream(ByteChannel channel) { |
| return new TestMessageStream(msgLength, channel, this); |
| } |
| |
| @Override |
| protected synchronized void removeStream(MessageStream<TestMessage> stream) { |
| super.removeStream(stream); |
| messages.add(stream.messagesIn().total()); |
| bytes.add(stream.bytesIn().total()); |
| stream.messagesOut().reset(); |
| stream.bytesOut().reset(); |
| } |
| |
| @Override |
| protected void processMessages(List<TestMessage> messages, |
| MessageStream<TestMessage> stream) { |
| for (TestMessage message : messages) { |
| // TODO: summarize latency data better |
| latencyTotal += nanoTime() - message.requestorTime(); |
| latencyCount++; |
| } |
| worker.release(messages.size()); |
| } |
| |
| @Override |
| protected void connect(SelectionKey key) throws IOException { |
| super.connect(key); |
| TestMessageStream b = (TestMessageStream) key.attachment(); |
| Worker w = ((CustomIOLoop) b.loop()).worker; |
| w.pump(b); |
| } |
| |
| } |
| |
| /** |
| * Auxiliary worker to connect and pump batched messages using blocking I/O. |
| */ |
| private class Worker implements Runnable { |
| |
| private static final int BATCH_SIZE = 50; |
| private static final int PERMITS = 2 * BATCH_SIZE; |
| |
| private TestMessageStream stream; |
| private FutureTask<Worker> task; |
| |
| // Stuff to throttle pump |
| private final Semaphore semaphore = new Semaphore(PERMITS); |
| private int msgWritten; |
| |
| void pump(TestMessageStream stream) { |
| this.stream = stream; |
| task = new FutureTask<>(this, this); |
| wpool.execute(task); |
| } |
| |
| @Override |
| public void run() { |
| try { |
| log.info("Worker started..."); |
| |
| while (msgWritten < msgCount) { |
| int size = Math.min(BATCH_SIZE, msgCount - msgWritten); |
| writeBatch(size); |
| msgWritten += size; |
| } |
| |
| // Now try to get all the permits back before sending poison pill |
| semaphore.acquireUninterruptibly(PERMITS); |
| stream.close(); |
| |
| log.info("Worker done..."); |
| |
| } catch (IOException e) { |
| log.error("Worker unable to perform I/O", e); |
| } |
| } |
| |
| |
| private void writeBatch(int size) throws IOException { |
| // Build a batch of messages |
| List<TestMessage> batch = Lists.newArrayListWithCapacity(size); |
| for (int i = 0; i < size; i++) { |
| batch.add(new TestMessage(msgLength, nanoTime(), 0, stream.padding())); |
| } |
| acquire(size); |
| stream.write(batch); |
| } |
| |
| |
| // Release permits based on the specified number of message credits |
| private void release(int permits) { |
| semaphore.release(permits); |
| } |
| |
| // Acquire permit for a single batch |
| private void acquire(int permits) { |
| semaphore.acquireUninterruptibly(permits); |
| } |
| |
| } |
| |
| } |