1 /* Master of a basic master/slave example in Java */
3 /* Copyright (c) 2006-2014. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
10 import java.util.ArrayList;
12 import org.simgrid.msg.Comm;
13 import org.simgrid.msg.Host;
14 import org.simgrid.msg.Msg;
15 import org.simgrid.msg.MsgException;
16 import org.simgrid.msg.Process;
17 import org.simgrid.msg.Task;
19 public class Master extends Process {
20 public Master(Host host, String name, String[]args) {
21 super(host,name,args);
23 public void main(String[] args) throws MsgException {
24 if (args.length < 4) {
25 Msg.info("Master needs 4 arguments");
29 int tasksCount = Integer.valueOf(args[0]).intValue();
30 double taskComputeSize = Double.valueOf(args[1]).doubleValue();
31 double taskCommunicateSize = Double.valueOf(args[2]).doubleValue();
33 int slavesCount = Integer.valueOf(args[3]).intValue();
35 Msg.info("Hello! Got "+ slavesCount + " slaves and "+tasksCount+" tasks to process");
36 ArrayList<Comm> comms = new ArrayList<Comm>();
38 for (int i = 0; i < tasksCount; i++) {
39 Task task = new Task("Task_" + i, taskComputeSize, taskCommunicateSize);
40 Msg.info("Sending \"" + task.getName()+ "\" to \"slave_" + i % slavesCount + "\"");
41 //task.send("slave_"+(i%slavesCount));
42 Comm comm = task.isend("slave_"+(i%slavesCount));
46 while (comms.size() > 0) {
47 for (int i = 0; i < comms.size(); i++) {
49 if (comms.get(i).test()) {
61 Msg.info("All tasks have been dispatched. Let's tell (asynchronously) everybody the computation is over, and sleep 20s so that nobody gets a message from a terminated process.");
63 for (int i = 0; i < slavesCount; i++) {
64 FinalizeTask task = new FinalizeTask();
65 task.dsend("slave_"+(i%slavesCount));
69 Msg.info("Goodbye now!");