1 # Copyright (c) 2010-2020. The SimGrid Team. All rights reserved.
3 # This program is free software; you can redistribute it and/or modify it
4 # under the terms of the license (GNU LGPL) which comes with this package.
6 from simgrid import Comm, Engine, Mailbox, this_actor
9 # This example shows how to block on the completion of a set of communications.
11 # As for the other asynchronous examples, the sender initiate all the messages it wants to send and
12 # pack the resulting simgrid.Comm objects in a list. All messages thus occur concurrently.
14 # The sender then blocks until all ongoing communication terminate, using simgrid.Comm.wait_all()
18 def __init__(self, *args):
20 raise AssertionError("Actor sender requires 3 parameters, but got {:d}".format(len(args)))
21 self.messages_count = int(args[0]) # number of tasks
22 self.msg_size = int(args[1]) # communication cost (in bytes)
23 self.receivers_count = int(args[2]) # number of receivers
26 # List in which we store all ongoing communications
29 # Vector of the used mailboxes
30 mboxes = [Mailbox.by_name("receiver-{:d}".format(i))
31 for i in range(0, self.receivers_count)]
33 # Start dispatching all messages to receivers, in a round robin fashion
34 for i in range(0, self.messages_count):
35 content = "Message {:d}".format(i)
36 mbox = mboxes[i % self.receivers_count]
38 this_actor.info("Send '{:s}' to '{:s}'".format(content, str(mbox)))
40 # Create a communication representing the ongoing communication, and store it in pending_comms
41 comm = mbox.put_async(content, self.msg_size)
42 pending_comms.append(comm)
44 # Start sending messages to let the workers know that they should stop
45 for i in range(0, self.receivers_count):
47 this_actor.info("Send 'finalize' to '{:s}'".format(str(mbox)))
48 comm = mbox.put_async("finalize", 0)
49 pending_comms.append(comm)
51 this_actor.info("Done dispatching all messages")
53 # Now that all message exchanges were initiated, wait for their completion in one single call
54 Comm.wait_all(pending_comms)
56 this_actor.info("Goodbye now!")
60 def __init__(self, *args):
61 if len(args) != 1: # Receiver actor expects 1 argument: its ID
63 "Actor receiver requires 1 parameter, but got {:d}".format(len(args)))
64 self.mbox = Mailbox.by_name("receiver-{:s}".format(args[0]))
67 this_actor.info("Wait for my first message")
69 received = self.mbox.get()
70 this_actor.info("I got a '{:s}'.".format(received))
71 if received == "finalize":
72 break # If it's a finalize message, we're done.
75 if __name__ == '__main__':
78 # Load the platform description
79 e.load_platform(sys.argv[1])
81 # Register the classes representing the actors
82 e.register_actor("sender", Sender)
83 e.register_actor("receiver", Receiver)
85 e.load_deployment(sys.argv[2])