1 /* Copyright (c) 2007-2010, 2013-2015. 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_test, "Messages specific for this msg example");
11 #define FINALIZE ((void*)221297) /* a magic number to tell people to stop working */
13 static char * build_channel_name(char *buffer, const char *sender, const char* receiver)
15 strcpy(buffer, sender);
17 strcat(buffer, receiver);
21 /** Master function */
22 static int master(int argc, char *argv[])
24 int workers_count = 0;
25 msg_host_t *workers = NULL;
26 msg_task_t *todo = NULL;
27 msg_host_t host_self = MSG_host_self();
28 char *master_name = (char *) MSG_host_get_name(host_self);
32 double timeout = xbt_str_parse_double(argv[1], "Invalid timeout: %s"); /** - timeout */
33 double comp_size = xbt_str_parse_double(argv[2], "Invalid computational size: %s"); /** - Task compute cost */
34 double comm_size = xbt_str_parse_double(argv[3], "Invalid communication size: %s"); /** - Task communication size */
36 { /* Process organization */
37 workers_count = MSG_get_host_number();
38 workers = xbt_dynar_to_array(MSG_hosts_as_dynar());
40 for (i = 0; i < workers_count; i++)
41 if(host_self == workers[i]) {
42 workers[i] = workers[workers_count-1];
47 for (i = 0; i < workers_count; i++)
48 MSG_process_create("worker", worker, master_name, workers[i]);
51 XBT_INFO("Got %d workers and will send tasks for %g seconds!", workers_count, timeout);
54 char sprintf_buffer[64];
55 msg_task_t task = NULL;
57 if(MSG_get_clock()>timeout) break;
59 sprintf(sprintf_buffer, "Task_%d", i);
60 task = MSG_task_create(sprintf_buffer, comp_size, comm_size, NULL);
62 build_channel_name(channel,master_name, MSG_host_get_name(workers[i % workers_count]));
64 XBT_DEBUG("Sending \"%s\" to channel \"%s\"", task->name, channel);
65 MSG_task_send(task, channel);
71 XBT_DEBUG ("All tasks have been dispatched. Let's tell everybody the computation is over.");
72 for (i = 0; i < workers_count; i++) {
73 msg_task_t finalize = MSG_task_create("finalize", 0, 0, FINALIZE);
74 MSG_task_send(finalize, build_channel_name(channel,master_name,
75 MSG_host_get_name(workers[i % workers_count])));
78 XBT_INFO("Sent %d tasks in total!", task_num);
84 /** Worker function */
85 static int worker(int argc, char *argv[])
87 msg_task_t task = NULL;
88 XBT_ATTRIB_UNUSED int res;
91 build_channel_name(channel,MSG_process_get_data(MSG_process_self()), MSG_host_get_name(MSG_host_self()));
93 XBT_DEBUG("Receiving on channel \"%s\"", channel);
96 res = MSG_task_receive(&(task),channel);
97 xbt_assert(res == MSG_OK, "MSG_task_receive failed");
99 XBT_DEBUG("Received \"%s\"", MSG_task_get_name(task));
100 if (!strcmp(MSG_task_get_name(task), "finalize")) {
101 MSG_task_destroy(task);
105 XBT_DEBUG("Processing \"%s\"", MSG_task_get_name(task));
106 MSG_task_execute(task);
107 XBT_DEBUG("\"%s\" done", MSG_task_get_name(task));
108 MSG_task_destroy(task);
111 XBT_DEBUG("I'm done. See you!");
113 } /* end_of_worker */
116 int main(int argc, char *argv[])
118 msg_error_t res = MSG_OK;
120 MSG_init(&argc, argv);
121 xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n"
122 "\tExample: %s msg_platform.xml msg_deployment.xml\n", argv[0], argv[0]);
123 { /* Simulation setting */
124 MSG_create_environment(argv[1]);
126 { /* Application deployment */
127 MSG_function_register("master", master);
128 MSG_function_register("worker", worker);
129 MSG_launch_application(argv[2]);
133 XBT_INFO("Simulation time %g", MSG_get_clock());
134 return (res != MSG_OK);