1 /* Copyright (c) 2007-2018. 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 #include <stdio.h> /* sprintf */
10 XBT_LOG_NEW_DEFAULT_CATEGORY(msg_test, "Messages specific for this msg example");
12 #define FINALIZE ((void*)221297) /* a magic number to tell people to stop working */
14 static char* build_channel_name(char* buffer, const char* sender, const char* receiver)
16 strcpy(buffer, sender);
18 strcat(buffer, receiver);
22 /* forward definitions */
23 static int master(int argc, char* argv[]);
24 static int worker(int argc, char* argv[]);
26 static int master(int argc, char* argv[])
28 msg_host_t host_self = MSG_host_self();
29 char* master_name = (char*)MSG_host_get_name(host_self);
32 TRACE_category(master_name);
34 double timeout = xbt_str_parse_double(argv[1], "Invalid timeout: %s"); /** - timeout */
35 double comp_size = xbt_str_parse_double(argv[2], "Invalid computational size: %s"); /** - Task compute cost */
36 double comm_size = xbt_str_parse_double(argv[3], "Invalid communication size: %s"); /** - Task communication size */
38 /* Get the info about the worker processes */
39 int worker_count = MSG_get_host_number();
40 msg_host_t* workers = xbt_dynar_to_array(MSG_hosts_as_dynar());
42 for (int i = 0; i < worker_count; i++) // Remove my host from the list
43 if (host_self == workers[i]) {
44 workers[i] = workers[worker_count - 1];
49 for (int i = 0; i < worker_count; i++)
50 MSG_process_create("worker", worker, (void*)master_name, workers[i]);
51 XBT_INFO("Got %d workers and will send tasks for %g seconds", worker_count, timeout);
53 /* Dispatch the tasks */
55 while (MSG_get_clock() < timeout) {
57 /* Retrieve the next incomming request */
58 XBT_DEBUG("Retrieve the next incomming request on %s", master_name);
59 msg_task_t request = NULL;
60 int res = MSG_task_receive(&(request), master_name);
61 xbt_assert(res == MSG_OK, "MSG_task_receive failed");
62 msg_host_t requester = MSG_task_get_data(request);
63 MSG_task_destroy(request);
65 /* Prepare the task to be sent */
66 char sprintf_buffer[64];
67 sprintf(sprintf_buffer, "Task_%d", task_num);
68 msg_task_t task = MSG_task_create(sprintf_buffer, comp_size, comm_size, NULL);
69 MSG_task_set_category(task, master_name);
72 build_channel_name(channel, master_name, MSG_host_get_name(requester));
74 XBT_DEBUG("Sending '%s' to channel '%s'", task->name, channel);
75 MSG_task_send(task, channel);
80 XBT_DEBUG("Time is up. Let's tell everybody the computation is over.");
81 for (int i = 0; i < worker_count; i++) { /* We don't write in order, but the total amount is right */
83 /* Don't write to a worker that did not request for work, or it will deadlock: both would be sending something */
84 msg_task_t request = NULL;
85 int res = MSG_task_receive(&(request), master_name);
86 xbt_assert(res == MSG_OK, "MSG_task_receive failed");
87 msg_host_t requester = MSG_task_get_data(request);
88 MSG_task_destroy(request);
90 XBT_DEBUG("Stop worker %s", MSG_host_get_name(requester));
91 msg_task_t finalize = MSG_task_create("finalize", 0, 0, FINALIZE);
92 MSG_task_send(finalize, build_channel_name(channel, master_name, MSG_host_get_name(requester)));
95 XBT_INFO("Sent %d tasks in total!", task_num);
100 /** Worker function */
101 static int worker(int argc, char* argv[])
105 const char* my_master = MSG_process_get_data(MSG_process_self());
106 build_channel_name(channel, my_master, MSG_host_get_name(MSG_host_self()));
108 XBT_DEBUG("Receiving on channel \"%s\"", channel);
112 XBT_DEBUG("Sent a request to my master on %s", my_master);
113 msg_task_t request = MSG_task_create("request", 0, 0, MSG_host_self());
114 MSG_task_send(request, my_master);
116 /* Wait for the answer */
117 msg_task_t task = NULL;
118 int res = MSG_task_receive(&(task), channel);
119 xbt_assert(res == MSG_OK, "MSG_task_receive failed");
121 XBT_DEBUG("Received '%s'", MSG_task_get_name(task));
122 if (!strcmp(MSG_task_get_name(task), "finalize")) {
123 MSG_task_destroy(task);
127 XBT_DEBUG("Processing '%s'", MSG_task_get_name(task));
128 MSG_task_execute(task);
129 XBT_DEBUG("'%s' done", MSG_task_get_name(task));
130 MSG_task_destroy(task);
132 XBT_DEBUG("I'm done. See you!");
137 int main(int argc, char* argv[])
139 MSG_init(&argc, argv);
141 "Usage: %s platform_file deployment_file\n"
142 "\tExample: %s msg_platform.xml msg_deployment.xml\n",
145 /* Create a simulated platform */
146 MSG_create_environment(argv[1]);
148 /* Application deployment */
149 MSG_function_register("master", master);
150 MSG_function_register("worker", worker);
151 MSG_launch_application(argv[2]);
153 /* Run the simulation */
154 msg_error_t res = MSG_main();
156 XBT_INFO("Simulation time %g", MSG_get_clock());
157 return (res != MSG_OK);