1 /* Copyright (c) 2006-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 package org.simgrid.msg;
10 * A task is either something to compute somewhere, or something to exchange between two hosts (or both).
11 * It is defined by a computing amount and a message size.
16 * This attribute represents a bind between a java task object and
17 * a native task. Even if this attribute is public you must never
18 * access to it. It is set automatically during the build of the object.
20 private long bind = 0;
24 protected String name;
26 private double messageSize;
28 static private Long idCpt = 0L;
32 /** Default constructor (all fields to 0 or null) */
44 * Construct an new task with the specified processing amount and amount
47 * @param name Task's name
49 * @param flopsAmount A value of the processing amount (in flop) needed to process the task.
50 * If 0, then it cannot be executed with the execute() method.
51 * This value has to be >= 0.
53 * @param bytesAmount A value of amount of data (in bytes) needed to transfert this task.
54 * If 0, then it cannot be transfered with the get() and put() methods.
55 * This value has to be >= 0.
57 public Task(String name, double flopsAmount, double bytesAmount) {
58 create(name, flopsAmount, bytesAmount);
59 this.messageSize = bytesAmount;
64 * Construct an new parallel task with the specified processing amount and amount for each host
67 * @param name The name of the parallel task.
68 * @param hosts The list of hosts implied by the parallel task.
69 * @param flopsAmount The amount of operations to be performed by each host of \a hosts.
70 * @param bytesAmount A matrix describing the amount of data to exchange between hosts.
72 public Task(String name, Host[]hosts, double[]flopsAmount, double[]bytesAmount) {
73 parallelCreate(name, hosts, flopsAmount, bytesAmount);
77 * The natively implemented method to create a MSG task.
79 * @param name The name of th task.
80 * @param flopsAmount A value of the processing amount (in flop) needed
81 * to process the task. If 0, then it cannot be executed
82 * with the execute() method. This value has to be >= 0.
83 * @param bytesAmount A value of amount of data (in bytes) needed to transfert
84 * this task. If 0, then it cannot be transfered this task.
85 * If 0, then it cannot be transfered with the get() and put()
86 * methods. This value has to be >= 0.
87 * @exception IllegalArgumentException if compute duration <0 or message size <0
89 private final native void create(String name,
92 throws IllegalArgumentException;
94 * The natively implemented method to create a MSG parallel task.
96 * @param name The name of the parallel task.
97 * @param hosts The list of hosts implied by the parallel task.
98 * @param flopsAmount The total number of operations that have to be performed
100 * @param bytesAmount An array of doubles
103 private final native void parallelCreate(String name,
107 throws NullPointerException, IllegalArgumentException;
109 * * Getters / Setters * *
111 /** Gets the name of a task */
112 public String getName() {
116 /** Gets the sender of the task (or null if not sent yet) */
117 public native Process getSender();
119 /** Gets the source of the task (or null if not sent yet). */
120 public native Host getSource();
122 /** Gets the remaining amount of flops to execute in this task
124 * If it's ongoing, you get the exact amount at the present time. If it's already done, it's 0.
126 public native double getFlopsAmount();
128 * Sets the name of the task
129 * @param name the new task name
131 public native void setName(String name);
133 * This method sets the priority of the computation of the task.
134 * The priority doesn't affect the transfer rate. For example a
135 * priority of 2 will make the task receive two times more cpu than
138 * @param priority The new priority of the task.
140 public native void setPriority(double priority);
142 /** Set the computation amount needed to process the task
144 * Warning if the execution is already started and ongoing, this call does nothing.
145 * @param flopsAmount the amount of computation needed to process the task
147 public native void setFlopsAmount(double flopsAmount);
149 * Set the amount of bytes to exchange the task
151 * Warning if the communication is already started and ongoing, this call does nothing.
152 * @param bytesAmount the size of the task
154 public native void setBytesAmount(double bytesAmount);
156 * * Computation-related * *
159 * Executes a task on the location on which the current process is running.
161 * @throws HostFailureException
162 * @throws TaskCancelledException
164 public native void execute() throws HostFailureException,TaskCancelledException;
166 /** Bound a computation to a certain load */
167 public native void setBound(double load);
169 /** Cancels a task. */
170 public native void cancel();
174 * @exception NativeException if the destruction failed.
176 protected void finalize() throws NativeException {
180 * The natively implemented method to destroy a MSG task.
182 protected native void destroy();
184 * * Communication-related * *
187 /** Send the task asynchronously on the specified mailbox,
188 * with no way to retrieve whether the communication succeeded or not
191 public native void dsendBounded(String mailbox, double maxrate);
194 /** Send the task asynchronously on the specified mailbox,
195 * with no way to retrieve whether the communication succeeded or not
198 public native void dsend(String mailbox);
201 * Sends the task on the specified mailbox
203 * @param mailbox where to send the message
204 * @throws TimeoutException
205 * @throws HostFailureException
206 * @throws TransferFailureException
208 public void send(String mailbox) throws TransferFailureException, HostFailureException, TimeoutException {
213 * Sends the task on the specified mailbox (wait at most \a timeout seconds)
215 * @param mailbox where to send the message
217 * @exception NativeException if the retrieval fails.
218 * @throws TimeoutException
219 * @throws HostFailureException
220 * @throws TransferFailureException
222 public native void send(String mailbox, double timeout) throws TransferFailureException, HostFailureException, TimeoutException;
224 /** Sends the task on the specified mailbox (capping the sending rate to \a maxrate)
226 * @param mailbox where to send the message
228 * @throws TransferFailureException
229 * @throws HostFailureException
230 * @throws TimeoutException
232 public void sendBounded(String mailbox, double maxrate) throws TransferFailureException, HostFailureException, TimeoutException {
233 sendBounded(mailbox,-1,maxrate);
237 /** Sends the task on the specified mailbox (capping the sending rate to \a maxrate) with a timeout
239 * @param mailbox where to send the message
242 * @throws TransferFailureException
243 * @throws HostFailureException
244 * @throws TimeoutException
246 public native void sendBounded(String mailbox, double timeout, double maxrate) throws TransferFailureException, HostFailureException, TimeoutException;
250 * Sends the task on the mailbox asynchronously
252 public native Comm isend(String mailbox);
255 * Sends the task on the mailbox asynchronously (capping the sending rate to \a maxrate)
257 public native Comm isendBounded(String mailbox, double maxrate);
261 * Starts listening for receiving a task from an asynchronous communication
264 public static native Comm irecv(String mailbox);
266 * Retrieves next task from the mailbox identified by the specified name
271 public static Task receive(String mailbox) throws TransferFailureException, HostFailureException, TimeoutException {
272 return receive(mailbox, -1.0, null);
276 * Retrieves next task on the mailbox identified by the specified name (wait at most \a timeout seconds)
281 public static Task receive(String mailbox, double timeout) throws TransferFailureException, HostFailureException, TimeoutException {
282 return receive(mailbox, timeout, null);
286 * Retrieves next task sent by a given host on the mailbox identified by the specified alias
292 public static Task receive(String mailbox, Host host) throws TransferFailureException, HostFailureException, TimeoutException {
293 return receive(mailbox, -1.0, host);
297 * Retrieves next task sent by a given host on the mailbox identified by the specified alias (wait at most \a timeout seconds)
303 public native static Task receive(String mailbox, double timeout, Host host) throws TransferFailureException, HostFailureException, TimeoutException;
306 * Starts listening for receiving a task from an asynchronous communication with a capped rate
309 public static native Comm irecvBounded(String mailbox, double rate);
311 * Retrieves next task from the mailbox identified by the specified name with a capped rate
316 public static Task receiveBounded(String mailbox, double rate) throws TransferFailureException, HostFailureException, TimeoutException {
317 return receiveBounded(mailbox, -1.0, null, rate);
321 * Retrieves next task on the mailbox identified by the specified name (wait at most \a timeout seconds) with a capped rate
326 public static Task receiveBounded(String mailbox, double timeout, double rate) throws TransferFailureException, HostFailureException, TimeoutException {
327 return receiveBounded(mailbox, timeout, null, rate);
331 * Retrieves next task sent by a given host on the mailbox identified by the specified alias with a capped rate
337 public static Task receiveBounded(String mailbox, Host host, double rate) throws TransferFailureException, HostFailureException, TimeoutException {
338 return receiveBounded(mailbox, -1.0, host, rate);
342 * Retrieves next task sent by a given host on the mailbox identified by the specified alias (wait at most \a timeout seconds)
349 public native static Task receiveBounded(String mailbox, double timeout, Host host, double rate) throws TransferFailureException, HostFailureException, TimeoutException;
354 * Tests whether there is a pending communication on the mailbox identified by the specified alias, and who sent it
356 public native static int listenFrom(String mailbox);
358 * Listen whether there is a waiting task on the mailbox identified by the specified alias
360 public native static boolean listen(String mailbox);
363 * Counts the number of tasks waiting to be received on the \a mailbox identified by the specified alia and sended by the specified \a host.
365 public native static int listenFromHost(String alias, Host host);
368 * Class initializer, to initialize various JNI stuff
370 public static native void nativeInit();
376 public double getMessageSize() {
377 return this.messageSize;
380 public Long getId() {
384 public void setId(Long id) {