1 /* Copyright (c) 2010-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include "simgrid/msg.h"
9 XBT_LOG_NEW_DEFAULT_CATEGORY(msg_app_masterworker, "Messages specific for this msg example");
11 /** @addtogroup MSG_examples
13 * - <b>Master/Workers: app-masterworker/app-masterworker.c</b>. This good old example is also very simple. Its
14 * basic version is fully commented on this page: \ref MSG_ex_master_worker.
17 /** @brief Master expects 4 arguments given in the XML deployment file: */
18 static int master(int argc, char *argv[])
20 long number_of_tasks = xbt_str_parse_int(argv[1], "Invalid amount of tasks: %s"); /** - Number of tasks */
21 double comp_size = xbt_str_parse_double(argv[2], "Invalid computational size: %s"); /** - Task compute cost */
22 double comm_size = xbt_str_parse_double(argv[3], "Invalid communication size: %s"); /** - Task communication size */
23 long workers_count = xbt_str_parse_int(argv[4], "Invalid amount of workers: %s"); /** - Number of workers */
27 XBT_INFO("Got %ld workers and %ld tasks to process", workers_count, number_of_tasks);
29 for (i = 0; i < number_of_tasks; i++) { /** For each task to be executed: */
33 sprintf(mailbox, "worker-%ld", i % workers_count); /** - Select a @ref worker in a round-robin way */
34 sprintf(task_name, "Task_%d", i);
35 msg_task_t task = MSG_task_create(task_name, comp_size, comm_size, NULL); /** - Create a task */
36 if (number_of_tasks < 10000 || i % 10000 == 0)
37 XBT_INFO("Sending \"%s\" (of %ld) to mailbox \"%s\"", task->name, number_of_tasks, mailbox);
39 MSG_task_send(task, mailbox); /** - Send the task to the @ref worker */
42 XBT_INFO("All tasks have been dispatched. Let's tell everybody the computation is over.");
43 for (i = 0; i < workers_count; i++) { /** - Eventually tell all the workers to stop by sending a "finalize" task */
46 sprintf(mailbox, "worker-%ld", i % workers_count);
47 msg_task_t finalize = MSG_task_create("finalize", 0, 0, 0);
48 MSG_task_send(finalize, mailbox);
54 /** @brief Worker expects a single argument given in the XML deployment file: */
55 static int worker(int argc, char *argv[])
57 msg_task_t task = NULL;
60 long id= xbt_str_parse_int(argv[1], "Invalid argument %s");
62 sprintf(mailbox, "worker-%ld", id); /** - unique id of the worker */
64 while (1) { /** The worker wait in an infinite loop for tasks sent by the \ref master */
65 int res = MSG_task_receive(&(task), mailbox);
66 xbt_assert(res == MSG_OK, "MSG_task_get failed");
68 // XBT_INFO("Received \"%s\"", MSG_task_get_name(task));
69 if (!strcmp(MSG_task_get_name(task), "finalize")) {
70 MSG_task_destroy(task); /** - Exit if 'finalize' is received */
73 // XBT_INFO("Processing \"%s\"", MSG_task_get_name(task));
74 MSG_task_execute(task); /** - Otherwise, process the task */
75 // XBT_INFO("\"%s\" done", MSG_task_get_name(task));
76 MSG_task_destroy(task);
79 XBT_INFO("I'm done. See you!");
83 int main(int argc, char *argv[])
85 MSG_init(&argc, argv);
86 xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n"
87 "\tExample: %s msg_platform.xml msg_deployment.xml\n", argv[0], argv[0]);
89 MSG_create_environment(argv[1]); /** - Load the platform description */
91 MSG_function_register("master", master); /** - Register the function to be executed by the processes */
92 MSG_function_register("worker", worker);
93 MSG_launch_application(argv[2]); /** - Deploy the application */
95 msg_error_t res = MSG_main(); /** - Run the simulation */
97 XBT_INFO("Simulation time %g", MSG_get_clock());