--- /dev/null
+/* Copyright (c) 2010-2019. 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 "simgrid/msg.h"
+
+#include <stdio.h> /* snprintf */
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(msg_app_masterworker, "Messages specific for this msg example");
+
+/* Main function of the master process */
+static int master(int argc, char *argv[])
+{
+ xbt_assert(argc==5, "The master function expects 4 arguments from the XML deployment file");
+ long number_of_tasks = xbt_str_parse_int(argv[1], "Invalid amount of tasks: %s"); /* - Number of tasks */
+ double comp_size = xbt_str_parse_double(argv[2], "Invalid computational size: %s"); /* - Task compute cost */
+ double comm_size = xbt_str_parse_double(argv[3], "Invalid communication size: %s"); /* - Task communication size */
+ long workers_count = xbt_str_parse_int(argv[4], "Invalid amount of workers: %s"); /* - Number of workers */
+
+ XBT_INFO("Got %ld workers and %ld tasks to process", workers_count, number_of_tasks);
+
+ for (int i = 0; i < number_of_tasks; i++) { /* For each task to be executed: */
+ char mailbox[80];
+ char task_name[80];
+
+ snprintf(mailbox,79, "worker-%ld", i % workers_count); /* - Select a @ref worker in a round-robin way */
+ snprintf(task_name,79, "Task_%d", i);
+ msg_task_t task = MSG_task_create(task_name, comp_size, comm_size, NULL); /* - Create a task */
+ if (number_of_tasks < 10000 || i % 10000 == 0)
+ XBT_INFO("Sending \"%s\" (of %ld) to mailbox \"%s\"", task->name, number_of_tasks, mailbox);
+
+ MSG_task_send(task, mailbox); /* - Send the task to the @ref worker */
+ }
+
+ 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 */
+ char mailbox[80];
+
+ snprintf(mailbox,79, "worker-%ld", i % workers_count);
+ msg_task_t finalize = MSG_task_create("finalize", 0, 0, 0);
+ MSG_task_send(finalize, mailbox);
+ }
+
+ return 0;
+}
+
+/* Main functions of the Worker processes */
+static int worker(int argc, char *argv[])
+{
+ xbt_assert(argc==2, "The worker expects a single argument from the XML deployment file: its worker ID (its numerical rank)");
+ char mailbox[80];
+
+ long id= xbt_str_parse_int(argv[1], "Invalid argument %s");
+
+ snprintf(mailbox,79, "worker-%ld", id);
+
+ while (1) { /* The worker wait in an infinite loop for tasks sent by the @ref master */
+ msg_task_t task = NULL;
+ int res = MSG_task_receive(&task, mailbox);
+ xbt_assert(res == MSG_OK, "MSG_task_get failed");
+
+ if (strcmp(MSG_task_get_name(task), "finalize") == 0) {
+ MSG_task_destroy(task); /* - Exit if 'finalize' is received */
+ break;
+ }
+ MSG_task_execute(task); /* - Otherwise, process the task */
+ MSG_task_destroy(task);
+ }
+ XBT_INFO("I'm done. See you!");
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ MSG_init(&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]);
+
+ MSG_create_environment(argv[1]); /* - Load the platform description */
+
+ MSG_function_register("master", master); /* - Register the function to be executed by the processes */
+ MSG_function_register("worker", worker);
+ MSG_launch_application(argv[2]); /* - Deploy the application */
+
+ msg_error_t res = MSG_main(); /* - Run the simulation */
+
+ XBT_INFO("Simulation time %g", MSG_get_clock());
+
+ return res != MSG_OK;
+}
