-/* Copyright (c) 2010-2018. The SimGrid Team. All rights reserved. */
+/* 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. */
-#include "xbt/sysdep.h"
+/* ************************************************************************* */
+/* Take this tutorial online: https://simgrid.frama.io/simgrid/tuto_s4u.html */
+/* ************************************************************************* */
+
#include <simgrid/s4u.hpp>
-#include <string>
-XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_app_masterworker, "Messages specific for this s4u example");
+XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_app_masterworker, "Messages specific for this example");
+// master-begin
static void master(std::vector<std::string> args)
{
- xbt_assert(args.size() == 5, "The master function expects 4 arguments from the XML deployment file");
-
- long number_of_tasks = std::stol(args[1]);
- double comp_size = std::stod(args[2]); /* - Task compute cost */
- double comm_size = std::stod(args[3]); /* - Task communication size */
- long workers_count = std::stol(args[4]);
-
- XBT_INFO("Got %ld workers and %ld tasks to process", workers_count, number_of_tasks);
+ xbt_assert(args.size() > 4, "The master function expects at least 3 arguments");
- simgrid::s4u::MailboxPtr mailbox = nullptr;
+ long tasks_count = std::stol(args[1]);
+ double compute_cost = std::stod(args[2]);
+ long communication_cost = std::stol(args[3]);
+ std::vector<simgrid::s4u::Mailbox*> workers;
+ for (unsigned int i = 4; i < args.size(); i++)
+ workers.push_back(simgrid::s4u::Mailbox::by_name(args[i]));
- for (int i = 0; i < number_of_tasks; i++) { /* For each task to be executed: */
- /* - Select a @ref worker in a round-robin way */
- mailbox = simgrid::s4u::Mailbox::by_name(std::string("worker-") + std::to_string(i % workers_count));
+ XBT_INFO("Got %zu workers and %ld tasks to process", workers.size(), tasks_count);
- if (number_of_tasks < 10000 || (number_of_tasks < 100000 && i % 10000 == 0) || i % 100000 == 0)
- XBT_INFO("Sending \"%s\" (of %ld) to mailbox \"%s\"", (std::string("Task_") + std::to_string(i)).c_str(),
- number_of_tasks, mailbox->get_cname());
+ for (int i = 0; i < tasks_count; i++) { /* For each task to be executed: */
+ /* - Select a worker in a round-robin way */
+ simgrid::s4u::Mailbox* mailbox = workers[i % workers.size()];
- /* - Send the computation amount to the @ref worker */
- mailbox->put(new double(comp_size), comm_size);
+ /* - Send the computation cost to that worker */
+ XBT_INFO("Sending task %d of %ld to mailbox '%s'", i, tasks_count, mailbox->get_cname());
+ mailbox->put(new double(compute_cost), communication_cost);
}
- XBT_INFO("All tasks have been dispatched. Let's tell everybody the computation is over.");
- for (int i = 0; i < workers_count; i++) {
- /* - Eventually tell all the workers to stop by sending a "finalize" task */
- mailbox = simgrid::s4u::Mailbox::by_name(std::string("worker-") + std::to_string(i % workers_count));
+ XBT_INFO("All tasks have been dispatched. Request all workers to stop.");
+ for (unsigned int i = 0; i < workers.size(); i++) {
+ /* The workers stop when receiving a negative compute_cost */
+ simgrid::s4u::Mailbox* mailbox = workers[i % workers.size()];
+
mailbox->put(new double(-1.0), 0);
}
}
+// master-end
+// worker-begin
static void worker(std::vector<std::string> args)
{
- xbt_assert(args.size() == 2, "The worker expects a single argument from the XML deployment file: "
- "its worker ID (its numerical rank)");
- long id = std::stol(args[1]);
- simgrid::s4u::MailboxPtr mailbox = simgrid::s4u::Mailbox::by_name(std::string("worker-") + std::to_string(id));
-
- while (1) { /* The worker waits in an infinite loop for tasks sent by the @ref master */
- double* task = static_cast<double*>(mailbox->get());
- xbt_assert(task != nullptr, "mailbox->get() failed");
- double comp_size = *task;
- delete task;
- if (comp_size < 0) { /* - Exit when -1.0 is received */
- XBT_INFO("I'm done. See you!");
- break;
- }
- /* - Otherwise, process the task */
- simgrid::s4u::this_actor::execute(comp_size);
- }
+ xbt_assert(args.size() == 1, "The worker expects no argument");
+
+ const simgrid::s4u::Host* my_host = simgrid::s4u::this_actor::get_host();
+ simgrid::s4u::Mailbox* mailbox = simgrid::s4u::Mailbox::by_name(my_host->get_name());
+
+ double compute_cost;
+ do {
+ auto msg = mailbox->get_unique<double>();
+ compute_cost = *msg;
+
+ if (compute_cost > 0) /* If compute_cost is valid, execute a computation of that cost */
+ simgrid::s4u::this_actor::execute(compute_cost);
+ } while (compute_cost > 0); /* Stop when receiving an invalid compute_cost */
+
+ XBT_INFO("Exiting now.");
}
+// worker-end
+// main-begin
int main(int argc, char* argv[])
{
simgrid::s4u::Engine e(&argc, argv);
- xbt_assert(argc > 2,
- "Usage: %s platform_file deployment_file\n"
- "\tExample: %s msg_platform.xml msg_deployment.xml\n",
- argv[0], argv[0]);
+ xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n", argv[0]);
- e.load_platform(argv[1]); /* Load the platform description */
+ /* Register the functions representing the actors */
e.register_function("master", &master);
e.register_function("worker", &worker);
- e.load_deployment(argv[2]); /* Deploy the application */
- e.run(); /** - Run the simulation */
+ /* Load the platform description and then deploy the application */
+ e.load_platform(argv[1]);
+ e.load_deployment(argv[2]);
+
+ /* Run the simulation */
+ e.run();
- XBT_INFO("Simulation time %g", e.get_clock());
+ XBT_INFO("Simulation is over");
return 0;
}
+// main-end
