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 TRACE_category(master_name);
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 /* Get the info about the worker processes */
37 int workers_count = argc - 4;
38 msg_host_t* workers = xbt_dynar_to_array(MSG_hosts_as_dynar());
40 for (int i = 0; i < workers_count; i++) // Remove my host from the list
41 if (host_self == workers[i]) {
42 workers[i] = workers[workers_count - 1];
47 for (int i = 0; i < workers_count; i++)
48 MSG_process_create("worker", worker, (void*)master_name, workers[i]);
49 XBT_INFO("Got %d workers and will send tasks for %g seconds", workers_count, timeout);
51 /* Dispatch the tasks */
52 xbt_dynar_t idle_hosts = xbt_dynar_new(sizeof(msg_host_t), NULL);
53 msg_host_t request_host = NULL;
57 while (MSG_task_listen(master_name)) {
58 msg_task_t request = NULL;
59 int res = MSG_task_receive(&(request), master_name);
60 xbt_assert(res == MSG_OK, "MSG_task_receive failed");
61 request_host = MSG_task_get_data(request);
62 xbt_dynar_push(idle_hosts, &request_host);
63 MSG_task_destroy(request);
66 if(MSG_get_clock()>timeout) {
67 if(xbt_dynar_length(idle_hosts) == workers_count) break;
69 MSG_process_sleep(.1);
74 if(xbt_dynar_length(idle_hosts)<=0) {
75 /* No request. Let's wait... */
76 MSG_process_sleep(.1);
80 char sprintf_buffer[64];
81 sprintf(sprintf_buffer, "Task_%d", task_num);
82 msg_task_t task = MSG_task_create(sprintf_buffer, comp_size, comm_size, NULL);
83 MSG_task_set_category(task, master_name);
85 xbt_dynar_shift(idle_hosts, &request_host);
87 build_channel_name(channel,master_name, MSG_host_get_name(request_host));
89 XBT_DEBUG("Sending '%s' to channel '%s'", task->name, channel);
90 MSG_task_send(task, channel);
95 XBT_DEBUG ("All tasks have been dispatched. Let's tell everybody the computation is over.");
96 for (int i = 0; i < workers_count; i++) {
97 msg_task_t finalize = MSG_task_create("finalize", 0, 0, FINALIZE);
98 MSG_task_send(finalize, build_channel_name(channel,master_name, MSG_host_get_name(workers[i % workers_count])));
101 XBT_INFO("Sent %d tasks in total!", task_num);
106 /** Worker function */
107 static int worker(int argc, char *argv[])
111 const char *my_master = MSG_process_get_data(MSG_process_self());
112 build_channel_name(channel, my_master, MSG_host_get_name(MSG_host_self()));
114 XBT_DEBUG("Receiving on channel \"%s\"", channel);
118 msg_task_t request = MSG_task_create("request", 0, 0, MSG_host_self());
119 MSG_task_send(request, my_master);
121 /* Wait for the answer */
122 msg_task_t task = NULL;
123 int res = MSG_task_receive(&(task), channel);
124 xbt_assert(res == MSG_OK, "MSG_task_receive failed");
126 XBT_DEBUG("Received '%s'", MSG_task_get_name(task));
127 if (!strcmp(MSG_task_get_name(task), "finalize")) {
128 MSG_task_destroy(task);
132 XBT_DEBUG("Processing '%s'", MSG_task_get_name(task));
133 MSG_task_execute(task);
134 XBT_DEBUG("'%s' done", MSG_task_get_name(task));
135 MSG_task_destroy(task);
137 XBT_DEBUG("I'm done. See you!");
142 int main(int argc, char *argv[])
144 MSG_init(&argc, argv);
145 xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n"
146 "\tExample: %s msg_platform.xml msg_deployment.xml\n", argv[0], argv[0]);
148 /* Create a simulated platform */
149 MSG_create_environment(argv[1]);
151 /* Application deployment */
152 MSG_function_register("master", master);
153 MSG_function_register("worker", worker);
154 MSG_launch_application(argv[2]);
156 /* Run the simulation */
157 msg_error_t res = MSG_main();
159 XBT_INFO("Simulation time %g", MSG_get_clock());
160 return (res != MSG_OK);