--- /dev/null
+/* Copyright (c) 2010-2017. 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/str.h"
+#include "xbt/sysdep.h"
+#include <simgrid/s4u.hpp>
+#include <string>
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_app_masterworker, "Messages specific for this s4u example");
+
+class Master {
+ long number_of_tasks = 0; /* - Number of tasks */
+ double comp_size = 0; /* - Task compute cost */
+ double comm_size = 0; /* - Task communication size */
+ long workers_count = 0; /* - Number of workers */
+ simgrid::s4u::MailboxPtr mailbox = nullptr;
+
+public:
+ explicit Master(std::vector<std::string> args)
+ {
+ xbt_assert(args.size() == 5, "The master function expects 4 arguments from the XML deployment file");
+
+ number_of_tasks = std::stol(args[1]);
+ comp_size = std::stod(args[2]);
+ comm_size = std::stod(args[3]);
+ workers_count = std::stol(args[4]);
+
+ XBT_INFO("Got %ld workers and %ld tasks to process", workers_count, number_of_tasks);
+ }
+
+ void operator()()
+ {
+ 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::byName(std::string("worker-") + std::to_string(i % workers_count));
+
+ if (number_of_tasks < 10000 || i % 10000 == 0)
+ XBT_INFO("Sending \"%s\" (of %ld) to mailbox \"%s\"", (std::string("Task_") + std::to_string(i)).c_str(),
+ number_of_tasks, mailbox->getName());
+
+ /* - Send the computation amount to the @ref worker */
+ mailbox->put(new double(comp_size), comm_size);
+ }
+
+ 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::byName(std::string("worker-") + std::to_string(i % workers_count));
+ mailbox->put(new double(-1.0), 0);
+ }
+ }
+};
+
+class Worker {
+ long id = -1;
+ simgrid::s4u::MailboxPtr mailbox = nullptr;
+
+public:
+ explicit 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)");
+ id = std::stol(args[1]);
+ mailbox = simgrid::s4u::Mailbox::byName(std::string("worker-") + std::to_string(id));
+ }
+
+ void operator()()
+ {
+ 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);
+ }
+ }
+};
+
+int main(int argc, char* argv[])
+{
+ simgrid::s4u::Engine* e = new simgrid::s4u::Engine(&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]);
+
+ e->loadPlatform(argv[1]); /** - Load the platform description */
+ e->registerFunction<Master>("master");
+ e->registerFunction<Worker>("worker"); /** - Register the function to be executed by the processes */
+ e->loadDeployment(argv[2]); /** - Deploy the application */
+
+ e->run(); /** - Run the simulation */
+
+ XBT_INFO("Simulation time %g", e->getClock());
+
+ delete e;
+ return 0;
+}
