1 /* Copyright (c) 2009-2018. 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 XBT_LOG_NEW_DEFAULT_CATEGORY(msg_process_migration, "Messages specific for this msg example");
11 static msg_process_t controlled_process = NULL;
13 /* The Emigrant process will be moved from host to host. */
14 static int emigrant(int argc, char* argv[])
16 XBT_INFO("I'll look for a new job on another machine ('Boivin') where the grass is greener.");
17 MSG_process_migrate(MSG_process_self(), MSG_host_by_name("Boivin")); /* - First, move to another host by myself */
19 XBT_INFO("Yeah, found something to do");
20 msg_task_t task = MSG_task_create("job", 98095000, 0, NULL); /* - Execute some work there */
21 MSG_task_execute(task);
22 MSG_task_destroy(task);
24 XBT_INFO("Moving back home after work");
25 MSG_process_migrate(MSG_process_self(), MSG_host_by_name("Jacquelin")); /* - Move back to original location */
26 MSG_process_migrate(MSG_process_self(), MSG_host_by_name("Boivin")); /* - Go back to the other host to sleep*/
28 controlled_process = MSG_process_self(); /* - Get controlled at checkpoint */
29 MSG_barrier_wait(barrier);
30 MSG_process_suspend(MSG_process_self());
31 msg_host_t h = MSG_process_get_host(MSG_process_self());
32 XBT_INFO("I've been moved on this new host: %s", MSG_host_get_name(h));
33 XBT_INFO("Uh, nothing to do here. Stopping now");
37 /* The policeman check for emigrants and move them back to 'Jacquelin' */
38 static int policeman(int argc, char* argv[])
40 XBT_INFO("Wait at the checkpoint."); /* - block on the mutex+condition */
41 MSG_barrier_wait(barrier);
42 MSG_process_migrate(controlled_process, MSG_host_by_name("Jacquelin")); /* - Move an emigrant to Jacquelin */
43 XBT_INFO("I moved the emigrant");
44 MSG_process_resume(controlled_process);
49 int main(int argc, char* argv[])
51 MSG_init(&argc, argv);
52 xbt_assert(argc == 2, "Usage: %s platform_file\n\tExample: %s msg_platform.xml\n", argv[0], argv[0]);
54 MSG_create_environment(argv[1]); /* - Load the platform description */
55 /* - Create and deploy the emigrant and policeman processes */
56 MSG_process_create("emigrant", emigrant, NULL, MSG_get_host_by_name("Jacquelin"));
57 MSG_process_create("policeman", policeman, NULL, MSG_get_host_by_name("Boivin"));
59 barrier = MSG_barrier_init(2);
60 msg_error_t res = MSG_main(); /* - Run the simulation */
61 XBT_INFO("Simulation time %g", MSG_get_clock());
62 MSG_barrier_destroy(barrier);