+/* Copyright (c) 2010-2020. 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/actor.h"
+#include "simgrid/engine.h"
+#include "simgrid/forward.h"
+#include "simgrid/mailbox.h"
+#include "xbt/asserts.h"
+#include "xbt/log.h"
+#include "xbt/str.h"
+
+#define FINALIZE 221297 /* a magic number to tell people to stop working */
+
+#include <stdio.h> /* snprintf */
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(app_masterworker, "Messages specific for this example");
+
+/* Main function of the master process */
+static void 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"); /* - Compute cost */
+ double comm_size = xbt_str_parse_double(argv[3], "Invalid communication size: %s"); /* - 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_name[80];
+ char task_name[80];
+ double* payload = (double*)malloc(sizeof(double));
+ snprintf(mailbox_name, 79, "worker-%ld", i % workers_count); /* - Select a @ref worker in a round-robin way */
+ snprintf(task_name, 79, "Task_%d", i);
+
+ sg_mailbox_t mailbox = sg_mailbox_by_name(mailbox_name);
+ *payload = comp_size;
+
+ if (number_of_tasks < 10000 || i % 10000 == 0)
+ XBT_INFO("Sending \"%s\" (of %ld) to mailbox \"%s\"", task_name, number_of_tasks, mailbox_name);
+
+ sg_mailbox_put(mailbox, payload, comm_size); /* - Send the amount of flops to compute 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_name[80];
+ snprintf(mailbox_name, 79, "worker-%ld", i % workers_count);
+ double* payload = (double*)malloc(sizeof(double));
+ sg_mailbox_t mailbox = sg_mailbox_by_name(mailbox_name);
+ *payload = FINALIZE;
+ sg_mailbox_put(mailbox, payload, 0);
+ }
+}
+
+/* Main functions of the Worker processes */
+static void 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_name[80];
+
+ long id = xbt_str_parse_int(argv[1], "Invalid argument %s");
+
+ snprintf(mailbox_name, 79, "worker-%ld", id);
+ sg_mailbox_t mailbox = sg_mailbox_by_name(mailbox_name);
+
+ while (1) { /* The worker wait in an infinite loop for tasks sent by the @ref master */
+ double* payload = (double*)sg_mailbox_get(mailbox);
+
+ if (*payload == FINALIZE) {
+ free(payload); /* - Exit if 'finalize' is received */
+ break;
+ }
+ sg_actor_execute(*payload); /* - Otherwise, process the received number of flops*/
+ free(payload);
+ }
+ XBT_INFO("I'm done. See you!");
+}
+
+int main(int argc, char* argv[])
+{
+ simgrid_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]);
+
+ simgrid_load_platform(argv[1]); /* - Load the platform description */
+
+ simgrid_register_function("master", master); /* - Register the function to be executed by the processes */
+ simgrid_register_function("worker", worker);
+ simgrid_load_deployment(argv[2]); /* - Deploy the application */
+
+ simgrid_run(); /* - Run the simulation */
+
+ XBT_INFO("Simulation time %g", simgrid_get_clock());
+
+ return 0;
+}