| 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.Socket; |
| import java.net.SocketAddress; |
| import java.nio.channels.ByteChannel; |
| import java.nio.channels.ServerSocketChannel; |
| import java.nio.channels.SocketChannel; |
| import java.text.DecimalFormat; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| |
| import static java.lang.String.format; |
| import static java.lang.System.out; |
| 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 IOLoopTestServer { |
| |
| private static Logger log = LoggerFactory.getLogger(IOLoopTestServer.class); |
| |
| private static final int PRUNE_FREQUENCY = 1000; |
| |
| static final int PORT = 9876; |
| static final long TIMEOUT = 1000; |
| |
| static final boolean SO_NO_DELAY = false; |
| static final int SO_SEND_BUFFER_SIZE = 128 * 1024; |
| static final int SO_RCV_BUFFER_SIZE = 128 * 1024; |
| |
| static final DecimalFormat FORMAT = new DecimalFormat("#,##0"); |
| |
| private final AcceptorLoop aloop; |
| private final ExecutorService apool = Executors.newSingleThreadExecutor(namedThreads("accept")); |
| |
| private final List<CustomIOLoop> iloops = new ArrayList<>(); |
| private final ExecutorService ipool; |
| |
| private final int workerCount; |
| private final int msgLength; |
| private int lastWorker = -1; |
| |
| Counter messages; |
| Counter bytes; |
| |
| /** |
| * Main entry point to launch the server. |
| * |
| * @param args command-line arguments |
| * @throws java.io.IOException if unable to crate IO loops |
| */ |
| public static void main(String[] args) throws IOException { |
| startStandalone(args); |
| System.exit(0); |
| } |
| |
| /** |
| * Starts a standalone IO loop test server. |
| * |
| * @param args command-line arguments |
| */ |
| public static void startStandalone(String[] args) throws IOException { |
| InetAddress ip = InetAddress.getByName(args.length > 0 ? args[0] : "127.0.0.1"); |
| int wc = args.length > 1 ? Integer.parseInt(args[1]) : 6; |
| int ml = args.length > 2 ? Integer.parseInt(args[2]) : 128; |
| |
| log.info("Setting up the server with {} workers, {} byte messages on {}... ", |
| wc, ml, ip); |
| IOLoopTestServer server = new IOLoopTestServer(ip, wc, ml, PORT); |
| server.start(); |
| |
| // Start pruning clients and keep going until their number goes to 0. |
| int remaining = -1; |
| while (remaining == -1 || remaining > 0) { |
| delay(PRUNE_FREQUENCY); |
| int r = server.prune(); |
| remaining = remaining == -1 && r == 0 ? remaining : r; |
| } |
| server.stop(); |
| } |
| |
| /** |
| * Creates a speed server. |
| * |
| * @param ip optional ip of the adapter where to bind |
| * @param wc worker count |
| * @param ml message length in bytes |
| * @param port listen port |
| * @throws java.io.IOException if unable to create IO loops |
| */ |
| public IOLoopTestServer(InetAddress ip, int wc, int ml, int port) throws IOException { |
| this.workerCount = wc; |
| this.msgLength = ml; |
| this.ipool = Executors.newFixedThreadPool(workerCount, namedThreads("io-loop")); |
| |
| this.aloop = new CustomAcceptLoop(new InetSocketAddress(ip, port)); |
| for (int i = 0; i < workerCount; i++) { |
| iloops.add(new CustomIOLoop()); |
| } |
| } |
| |
| /** |
| * Start the server IO loops and kicks off throughput tracking. |
| */ |
| public void start() { |
| messages = new Counter(); |
| bytes = new Counter(); |
| |
| for (CustomIOLoop l : iloops) { |
| ipool.execute(l); |
| } |
| apool.execute(aloop); |
| |
| for (CustomIOLoop l : iloops) { |
| l.awaitStart(TIMEOUT); |
| } |
| aloop.awaitStart(TIMEOUT); |
| } |
| |
| /** |
| * Stop the server IO loops and freezes throughput tracking. |
| */ |
| public void stop() { |
| aloop.shutdown(); |
| for (CustomIOLoop l : iloops) { |
| l.shutdown(); |
| } |
| |
| for (CustomIOLoop l : iloops) { |
| l.awaitStop(TIMEOUT); |
| } |
| aloop.awaitStop(TIMEOUT); |
| |
| messages.freeze(); |
| bytes.freeze(); |
| } |
| |
| /** |
| * Reports on the accumulated throughput trackers. |
| */ |
| public void report() { |
| DecimalFormat f = new DecimalFormat("#,##0"); |
| out.println(format("Server: %s messages; %s bytes; %s mps; %s MBs", |
| f.format(messages.total()), f.format(bytes.total()), |
| f.format(messages.throughput()), |
| f.format(bytes.throughput() / (1024 * msgLength)))); |
| } |
| |
| /** |
| * Prunes the IO loops of stale message buffers. |
| * |
| * @return number of remaining IO loops among all workers. |
| */ |
| public int prune() { |
| int count = 0; |
| for (CustomIOLoop l : iloops) { |
| count += l.pruneStaleStreams(); |
| } |
| return count; |
| } |
| |
| // Get the next worker to which a client should be assigned |
| private synchronized CustomIOLoop nextWorker() { |
| lastWorker = (lastWorker + 1) % workerCount; |
| return iloops.get(lastWorker); |
| } |
| |
| // Loop for transfer of fixed-length messages |
| private class CustomIOLoop extends IOLoop<TestMessage, TestMessageStream> { |
| |
| public CustomIOLoop() throws IOException { |
| super(500); |
| } |
| |
| @Override |
| protected TestMessageStream createStream(ByteChannel channel) { |
| return new TestMessageStream(msgLength, channel, this); |
| } |
| |
| @Override |
| protected void removeStream(MessageStream<TestMessage> stream) { |
| super.removeStream(stream); |
| messages.add(stream.messagesIn().total()); |
| bytes.add(stream.bytesIn().total()); |
| } |
| |
| @Override |
| protected void processMessages(List<TestMessage> messages, |
| MessageStream<TestMessage> stream) { |
| try { |
| stream.write(createResponses(messages)); |
| } catch (IOException e) { |
| log.error("Unable to echo messages", e); |
| } |
| } |
| |
| private List<TestMessage> createResponses(List<TestMessage> messages) { |
| List<TestMessage> responses = Lists.newArrayListWithCapacity(messages.size()); |
| for (TestMessage message : messages) { |
| responses.add(new TestMessage(message.length(), message.requestorTime(), |
| System.nanoTime(), message.padding())); |
| } |
| return responses; |
| } |
| } |
| |
| // Loop for accepting client connections |
| private class CustomAcceptLoop extends AcceptorLoop { |
| |
| public CustomAcceptLoop(SocketAddress address) throws IOException { |
| super(500, address); |
| } |
| |
| @Override |
| protected void acceptConnection(ServerSocketChannel channel) throws IOException { |
| SocketChannel sc = channel.accept(); |
| sc.configureBlocking(false); |
| |
| Socket so = sc.socket(); |
| so.setTcpNoDelay(SO_NO_DELAY); |
| so.setReceiveBufferSize(SO_RCV_BUFFER_SIZE); |
| so.setSendBufferSize(SO_SEND_BUFFER_SIZE); |
| |
| nextWorker().acceptStream(sc); |
| log.info("Connected client"); |
| } |
| } |
| |
| } |