1 /* Copyright (c) 2007-2017. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "simgrid/msg.h"
8 XBT_LOG_NEW_DEFAULT_CATEGORY(msg_test, "Messages specific for this msg example");
10 #define FINALIZE ((void*)221297) /* a magic number to tell people to stop working */
12 static char* build_channel_name(char* buffer, const char* sender, const char* receiver)
14 strcpy(buffer, sender);
16 strcat(buffer, receiver);
20 /* forward definitions */
21 static int master(int argc, char* argv[]);
22 static int worker(int argc, char* argv[]);
24 static int master(int argc, char* argv[])
26 msg_host_t host_self = MSG_host_self();
27 char* master_name = (char*)MSG_host_get_name(host_self);
30 double timeout = xbt_str_parse_double(argv[1], "Invalid timeout: %s"); /** - timeout */
31 double comp_size = xbt_str_parse_double(argv[2], "Invalid computational size: %s"); /** - Task compute cost */
32 double comm_size = xbt_str_parse_double(argv[3], "Invalid communication size: %s"); /** - Task communication size */
34 /* Get the info about the worker processes (directly from SimGrid) */
35 int workers_count = MSG_get_host_number();
36 msg_host_t* workers = xbt_dynar_to_array(MSG_hosts_as_dynar());
38 for (int i = 0; i < workers_count; i++) // Remove my host from the list
39 if (host_self == workers[i]) {
40 workers[i] = workers[workers_count - 1];
45 for (int i = 0; i < workers_count; i++)
46 MSG_process_create("worker", worker, (void*)master_name, workers[i]);
47 XBT_INFO("Got %d workers and will send tasks for %g seconds", workers_count, timeout);
49 /* Dispatch the tasks */
52 if (MSG_get_clock() > timeout)
55 char sprintf_buffer[64];
56 sprintf(sprintf_buffer, "Task_%d", task_num);
57 msg_task_t task = MSG_task_create(sprintf_buffer, comp_size, comm_size, NULL);
59 build_channel_name(channel, master_name, MSG_host_get_name(workers[task_num % workers_count]));
61 XBT_DEBUG("Sending '%s' to channel '%s'", task->name, channel);
62 MSG_task_send(task, channel);
67 XBT_DEBUG("All tasks have been dispatched. Let's tell everybody the computation is over.");
68 for (int i = 0; i < workers_count; i++) {
69 msg_task_t finalize = MSG_task_create("finalize", 0, 0, FINALIZE);
70 MSG_task_send(finalize, build_channel_name(channel, master_name, MSG_host_get_name(workers[i % workers_count])));
73 XBT_DEBUG("Sent %d tasks in total!", task_num);
78 /** Worker function */
79 static int worker(int argc, char* argv[])
83 build_channel_name(channel, MSG_process_get_data(MSG_process_self()), MSG_host_get_name(MSG_host_self()));
85 XBT_DEBUG("Receiving on channel '%s'", channel);
88 msg_task_t task = NULL;
89 int res = MSG_task_receive(&(task), channel);
90 xbt_assert(res == MSG_OK, "MSG_task_receive failed");
92 XBT_DEBUG("Received '%s'", MSG_task_get_name(task));
93 if (!strcmp(MSG_task_get_name(task), "finalize")) {
94 MSG_task_destroy(task);
98 XBT_DEBUG("Processing '%s'", MSG_task_get_name(task));
99 MSG_task_execute(task);
100 XBT_DEBUG("'%s' done", MSG_task_get_name(task));
101 MSG_task_destroy(task);
103 XBT_DEBUG("I'm done. See you!");
108 int main(int argc, char* argv[])
110 MSG_init(&argc, argv);
112 "Usage: %s platform_file deployment_file\n"
113 "\tExample: %s msg_platform.xml msg_deployment.xml\n",
116 /* Create a simulated platform */
117 MSG_create_environment(argv[1]);
119 /* Application deployment */
120 MSG_function_register("master", master);
121 MSG_function_register("worker", worker);
122 MSG_launch_application(argv[2]);
124 /* Run the simulation */
125 msg_error_t res = MSG_main();
127 XBT_INFO("Simulation time %g", MSG_get_clock());
128 return (res != MSG_OK);