+++ /dev/null
-/* Copyright (c) 2010-2021. 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. */
-
-/* This example shows how to use simgrid::s4u::this_actor::wait_any() to wait for the first occurring event.
- *
- * As for the other asynchronous examples, the sender initiate all the messages it wants to send and
- * pack the resulting simgrid::s4u::CommPtr objects in a vector. All messages thus occur concurrently.
- *
- * The sender then loops until there is no ongoing communication. Using wait_any() ensures that the sender
- * will notice events as soon as they occur even if it does not follow the order of the container.
- *
- * Here, finalize messages will terminate earlier because their size is 0, so they travel faster than the
- * other messages of this application. As expected, the trace shows that the finalize of worker 1 is
- * processed before 'Message 5' that is sent to worker 0.
- *
- */
-
-#include "simgrid/s4u.hpp"
-#include <cstdlib>
-#include <iostream>
-#include <string>
-
-XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_comm_waitall, "Messages specific for this s4u example");
-
-class Sender {
- long messages_count; /* - number of messages */
- long receivers_count; /* - number of receivers */
- long msg_size; /* - message size in bytes */
-
-public:
- explicit Sender(std::vector<std::string> args)
- {
- xbt_assert(args.size() == 4, "Expecting 3 parameters from the XML deployment file but got %zu", args.size());
- messages_count = std::stol(args[1]);
- msg_size = std::stol(args[2]);
- receivers_count = std::stol(args[3]);
- }
- void operator()() const
- {
- /* Vector in which we store all ongoing communications */
- std::vector<simgrid::s4u::CommPtr> pending_comms;
-
- /* Make a vector of the mailboxes to use */
- std::vector<simgrid::s4u::Mailbox*> mboxes;
- for (int i = 0; i < receivers_count; i++)
- mboxes.push_back(simgrid::s4u::Mailbox::by_name(std::string("receiver-") + std::to_string(i)));
-
- /* Start dispatching all messages to receivers, in a round robin fashion */
- for (int i = 0; i < messages_count; i++) {
- std::string msg_content = std::string("Message ") + std::to_string(i);
- // Copy the data we send: the 'msg_content' variable is not a stable storage location.
- // It will be destroyed when this actor leaves the loop, ie before the receiver gets it
- auto* payload = new std::string(msg_content);
-
- XBT_INFO("Send '%s' to '%s'", msg_content.c_str(), mboxes[i % receivers_count]->get_cname());
-
- /* Create a communication representing the ongoing communication, and store it in pending_comms */
- simgrid::s4u::CommPtr comm = mboxes[i % receivers_count]->put_async(payload, msg_size);
- pending_comms.push_back(comm);
- }
-
- /* Start sending messages to let the workers know that they should stop */
- for (int i = 0; i < receivers_count; i++) {
- XBT_INFO("Send 'finalize' to 'receiver-%d'", i);
- simgrid::s4u::CommPtr comm = mboxes[i]->put_async(new std::string("finalize"), 0);
- pending_comms.push_back(comm);
- }
- XBT_INFO("Done dispatching all messages");
-
- /* Now that all message exchanges were initiated, wait for their completion, in order of termination.
- *
- * This loop waits for first terminating message with wait_any() and remove it with erase(), until all comms are
- * terminated
- * Even in this simple example, the pending comms do not terminate in the exact same order of creation.
- */
- while (not pending_comms.empty()) {
- int changed_pos = simgrid::s4u::Comm::wait_any(&pending_comms);
- pending_comms.erase(pending_comms.begin() + changed_pos);
- if (changed_pos != 0)
- XBT_INFO("Remove the %dth pending comm: it terminated earlier than another comm that was initiated first.",
- changed_pos);
- }
-
- XBT_INFO("Goodbye now!");
- }
-};
-
-/* Receiver actor expects 1 argument: its ID */
-class Receiver {
- simgrid::s4u::Mailbox* mbox;
-
-public:
- explicit Receiver(std::vector<std::string> args)
- {
- xbt_assert(args.size() == 2, "Expecting one parameter from the XML deployment file but got %zu", args.size());
- std::string mboxName = std::string("receiver-") + args[1];
- mbox = simgrid::s4u::Mailbox::by_name(mboxName);
- }
- void operator()()
- {
- XBT_INFO("Wait for my first message");
- for (bool cont = true; cont;) {
- auto received = mbox->get_unique<std::string>();
- XBT_INFO("I got a '%s'.", received->c_str());
- cont = (*received != "finalize"); // If it's a finalize message, we're done
- // Receiving the message was all we were supposed to do
- }
- }
-};
-
-int main(int argc, char* argv[])
-{
- xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n", argv[0]);
-
- simgrid::s4u::Engine e(&argc, argv);
- e.register_actor<Sender>("sender");
- e.register_actor<Receiver>("receiver");
-
- e.load_platform(argv[1]);
- e.load_deployment(argv[2]);
- e.run();
-
- return 0;
-}
