libzmq/perf/java/remote_lat.java

/*
    Copyright (c) 2007-2009 FastMQ Inc.

    This file is part of 0MQ.

    0MQ is free software; you can redistribute it and/or modify it under
    the terms of the Lesser GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    0MQ 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
    Lesser GNU General Public License for more details.

    You should have received a copy of the Lesser GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

import org.zmq.*;

class remote_lat
{
     public static void main (String [] args)
     {
         if (args.length != 3) {
             System.out.println ("usage: remote_lat <connect-to> " +
                 "<message size> <roundtrip count>");
             return;
         }

         String connectTo = args [0];
         int messageSize = Integer.parseInt (args [1]);
         int roundtripCount = Integer.parseInt (args [2]);

         org.zmq.Context ctx = new org.zmq.Context (1, 1);

         org.zmq.Socket s = new org.zmq.Socket (ctx, org.zmq.Socket.REQ);
         s.connect (connectTo);

         long start = System.currentTimeMillis ();

         byte data [] = new byte [messageSize];
         for (int i = 0; i != roundtripCount; i ++) {
             s.send (data, 0);
             data = s.recv (0);
             assert (data.length == messageSize);
         }

         long end = System.currentTimeMillis ();

         long elapsed = (end - start) * 1000;
         double latency = (double) elapsed / roundtripCount / 2;

         System.out.println ("message size: " + messageSize + " [B]");
         System.out.println ("roundtrip count: " + roundtripCount);
         System.out.println ("mean latency: " + latency + " [us]");
     }
}