/*
* Copyright 2016 higherfrequencytrading.com
*
* 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 net.openhft.lang.io;
import java.io.EOFException;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.util.Arrays;
/**
* Created by peter.lawrey on 21/11/14.
*/
public class PingPongMain {
public static final int PORT = Integer.getInteger("port", 8181);
public static final int SIZE = Integer.getInteger("size", 128);
public static void main(String[] args) throws IOException {
if (args.length < 1)
startServer();
else
startClient(args[0]);
}
private static void startClient(String hostname) throws IOException {
int runs = 100000;
int[] times = new int[runs];
SocketChannel sc = SocketChannel.open(new InetSocketAddress(hostname, PORT));
System.out.println("Connected to " + hostname + ":" + PORT);
sc.configureBlocking(false);
ByteBuffer bb = ByteBuffer.allocateDirect(SIZE);
for (int j = 0; j < 3; j++) {
for (int i = 0; i < runs; i++) {
long start = System.nanoTime();
bb.clear();
while (bb.remaining() > 0) {
int len = sc.write(bb);
if (len < 0)
throw new EOFException("write");
}
bb.clear();
while (bb.remaining() > 0) {
int len = sc.read(bb);
if (len < 0)
throw new EOFException("read");
}
times[i] = (int) (System.nanoTime() - start);
}
Arrays.sort(times);
System.out.printf("50/90/99/99.9 %%tile %,d / %,d / %,d / %,d%n",
times[runs / 2] / 1000,
times[runs - runs / 10] / 1000,
times[runs - runs / 100] / 1000,
times[runs - runs / 1000] / 1000
);
}
sc.close();
}
private static void startServer() throws IOException {
ServerSocketChannel ssc = ServerSocketChannel.open();
ssc.socket().setReuseAddress(true);
ssc.socket().bind(new InetSocketAddress(PORT));
System.out.println("Listening for one connection on port " + PORT);
SocketChannel sc = ssc.accept();
sc.configureBlocking(false);
ByteBuffer bb = ByteBuffer.allocateDirect(16 * 1024);
bb.clear(); // Prepare buffer for use
while (sc.read(bb) >= 0 || bb.position() != 0) {
bb.flip();
sc.write(bb);
bb.compact(); // In case of partial write
}
sc.close();
ssc.close();
System.out.println("... finished");
}
}