-/* Copyright (c) 2006-2015. The SimGrid Team.
- * All rights reserved. */
+/* Copyright (c) 2006-2016. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
* * Constructors * *
* * * */
/**
- * Construct an new task with the specified processing amount and amount
+ * Construct a new task with the specified processing amount and amount
* of data needed.
*
* @param name Task's name
* This value has to be ≥ 0.
*/
public Task(String name, double flopsAmount, double bytesAmount) {
+ if (flopsAmount<0)
+ throw new IllegalArgumentException("Task flopsAmount (" + flopsAmount + ") cannot be negative");
+ if (bytesAmount<0)
+ throw new IllegalArgumentException("Task bytesAmount (" + bytesAmount + ") cannot be negative");
+
create(name, flopsAmount, bytesAmount);
+
+ this.name = name;
this.messageSize = bytesAmount;
}
/**
- * Construct an new parallel task with the specified processing amount and amount for each host
+ * Construct a new parallel task with the specified processing amount and amount for each host
* implied.
*
* @param name The name of the parallel task.
* @param hosts The list of hosts implied by the parallel task.
- * @param flopsAmount The amount of operations to be performed by each host of \a hosts.
- * @param bytesAmount A matrix describing the amount of data to exchange between hosts.
+ * @param flopsAmount The amount of operations to be performed by each host of hosts.
+ * flopsAmount[i] is the total number of operations that have to be
+ * performed on hosts[i].
+ * @param bytesAmount A matrix describing the amount of data to exchange between hosts. The
+ * length of this array must be hosts.length * hosts.length. It is actually
+ * used as a matrix with the lines being the source and the columns being
+ * the destination of the communications.
*/
public Task(String name, Host[]hosts, double[]flopsAmount, double[]bytesAmount) {
+ if (flopsAmount == null)
+ throw new NullPointerException("Parallel task flops amounts is null");
+ if (bytesAmount == null)
+ throw new NullPointerException("Parallel task bytes amounts is null");
+ if (hosts == null)
+ throw new NullPointerException("Host list is null");
+ if (name == null)
+ throw new NullPointerException("Parallel task name is null");
+
parallelCreate(name, hosts, flopsAmount, bytesAmount);
+ this.name = name;
}
/**
* The natively implemented method to create a MSG task.
*
- * @param name The name of th task.
+ * @param name The name of the task.
* @param flopsAmount A value of the processing amount (in flop) needed
* to process the task. If 0, then it cannot be executed
* with the execute() method. This value has to be >= 0.
*/
private final native void create(String name,
double flopsAmount,
- double bytesAmount)
- throws IllegalArgumentException;
+ double bytesAmount);
/**
* The natively implemented method to create a MSG parallel task.
*
* @param name The name of the parallel task.
- * @param hosts The list of hosts implied by the parallel task.
+ * @param hosts The list of hosts implied by the parallel task.
* @param flopsAmount The total number of operations that have to be performed
* on the hosts.
* @param bytesAmount An array of doubles
private final native void parallelCreate(String name,
Host[]hosts,
double[]flopsAmount,
- double[]bytesAmount)
- throws NullPointerException, IllegalArgumentException;
+ double[]bytesAmount);
/* * * *
* * Getters / Setters * *
* * * */
- /** Gets the name of a task */
+ /** Gets the name of the task */
public String getName() {
return name;
}
*/
public native void execute() throws HostFailureException,TaskCancelledException;
- /** Bound a computation to a certain load */
- public native void setBound(double load);
+ /** Changes the maximum CPU utilization of a computation task. Unit is flops/s. */
+ public native void setBound(double bound);
/** Cancels a task. */
public native void cancel();
/** Deletes a task once the garbage collector reclaims it */
@Override
- protected void finalize() {
- try {
- // Exceptions in finalizers lead to bad situations:
- // http://stackoverflow.com/questions/7644556/troubleshooting-a-java-memory-leak-finalization
- nativeFinalize();
- bind=0; // to avoid segfaults if the impossible happens yet again making this task surviving its finalize()
- } catch (Throwable e) {
- e.printStackTrace();
- }
+ protected void finalize() throws Throwable{
+ nativeFinalize();
+ bind=0; // to avoid segfaults if the impossible happens yet again making this task surviving its finalize()
}
protected native void nativeFinalize();
/* * * *
* @throws HostFailureException
* @throws TransferFailureException
*/
- public void send(String mailbox) throws TransferFailureException, HostFailureException, TimeoutException, NativeException {
+ public void send(String mailbox) throws TransferFailureException, HostFailureException, TimeoutException {
send(mailbox, -1);
}
*
* @param mailbox where to send the message
* @param timeout
- * @exception NativeException if the retrieval fails.
* @throws TimeoutException
* @throws HostFailureException
* @throws TransferFailureException
*/
- public native void send(String mailbox, double timeout) throws TransferFailureException, HostFailureException, TimeoutException, NativeException;
+ public void send(String mailbox, double timeout) throws TransferFailureException, HostFailureException, TimeoutException {
+ sendBounded(mailbox, timeout, -1);
+ }
/** Sends the task on the specified mailbox (capping the sending rate to \a maxrate)
*
* @throws TimeoutException
*/
public void sendBounded(String mailbox, double maxrate) throws TransferFailureException, HostFailureException, TimeoutException {
- sendBounded(mailbox,-1,maxrate);
+ sendBounded(mailbox, -1, maxrate);
}
/**
* Starts listening for receiving a task from an asynchronous communication
* @param mailbox
+ * @return a Comm handler
*/
public static native Comm irecv(String mailbox);
- /**
- * Retrieves next task from the mailbox identified by the specified name
- *
- * @param mailbox
- */
-
- public static Task receive(String mailbox) throws TransferFailureException, HostFailureException, TimeoutException {
- return receive(mailbox, -1.0, null);
- }
/**
- * Retrieves next task on the mailbox identified by the specified name (wait at most \a timeout seconds)
+ * Retrieves next task on the mailbox identified by the specified alias
*
* @param mailbox
- * @param timeout
- */
- public static Task receive(String mailbox, double timeout) throws TransferFailureException, HostFailureException, TimeoutException {
- return receive(mailbox, timeout, null);
- }
-
- /**
- * Retrieves next task sent by a given host on the mailbox identified by the specified alias
- *
- * @param mailbox
- * @param host
+ * @return a Task
*/
- public static Task receive(String mailbox, Host host) throws TransferFailureException, HostFailureException, TimeoutException {
- return receive(mailbox, -1.0, host);
+ public static Task receive(String mailbox) throws TransferFailureException, HostFailureException, TimeoutException {
+ return receive(mailbox, -1.0);
}
/**
- * Retrieves next task sent by a given host on the mailbox identified by the specified alias (wait at most \a timeout seconds)
+ * Retrieves next task on the mailbox identified by the specified alias (wait at most \a timeout seconds)
*
* @param mailbox
* @param timeout
- * @param host
+ * @return a Task
*/
- public native static Task receive(String mailbox, double timeout, Host host) throws TransferFailureException, HostFailureException, TimeoutException;
+ public static native Task receive(String mailbox, double timeout) throws TransferFailureException, HostFailureException, TimeoutException;
/**
* Starts listening for receiving a task from an asynchronous communication with a capped rate
* @param mailbox
+ * @return a Comm handler
*/
public static native Comm irecvBounded(String mailbox, double rate);
/**
* Retrieves next task from the mailbox identified by the specified name with a capped rate
*
* @param mailbox
+ * @return a Task
*/
public static Task receiveBounded(String mailbox, double rate) throws TransferFailureException, HostFailureException, TimeoutException {
- return receiveBounded(mailbox, -1.0, null, rate);
+ return receiveBounded(mailbox, -1.0, rate);
}
/**
*
* @param mailbox
* @param timeout
+ * @return a Task
*/
- public static Task receiveBounded(String mailbox, double timeout, double rate) throws TransferFailureException, HostFailureException, TimeoutException {
- return receiveBounded(mailbox, timeout, null, rate);
- }
-
- /**
- * Retrieves next task sent by a given host on the mailbox identified by the specified alias with a capped rate
- *
- * @param mailbox
- * @param host
- */
-
- public static Task receiveBounded(String mailbox, Host host, double rate) throws TransferFailureException, HostFailureException, TimeoutException {
- return receiveBounded(mailbox, -1.0, host, rate);
- }
-
- /**
- * Retrieves next task sent by a given host on the mailbox identified by the specified alias (wait at most \a timeout seconds)
- * with a capped rate
- *
- * @param mailbox
- * @param timeout
- * @param host
- */
- public native static Task receiveBounded(String mailbox, double timeout, Host host, double rate) throws TransferFailureException, HostFailureException, TimeoutException;
+ public static native Task receiveBounded(String mailbox, double timeout, double rate) throws TransferFailureException, HostFailureException, TimeoutException;
/**
* Tests whether there is a pending communication on the mailbox identified by the specified alias, and who sent it
*/
- public native static int listenFrom(String mailbox);
+ public static native int listenFrom(String mailbox);
/**
* Listen whether there is a task waiting (either for a send or a recv) on the mailbox identified by the specified alias
*/
- public native static boolean listen(String mailbox);
-
- /**
- * 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.
- */
- public native static int listenFromHost(String alias, Host host);
+ public static native boolean listen(String mailbox);
/**
* Class initializer, to initialize various JNI stuff
