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 /** @addtogroup MSG_examples
11 * - <b>energy-pstate/energy-pstate.c</b> Shows how a set of pstates can be defined for a host and how the current
13 * accessed/changed with @ref MSG_get_host_current_power_peak and @ref MSG_set_host_pstate.
14 * Make sure to read the platform XML file for details on how to declare the CPU capacity for each pstate.
17 XBT_LOG_NEW_DEFAULT_CATEGORY(test, "Pstate properties test");
19 static int dvfs(int argc, char *argv[])
21 double workload = 100E6;
23 msg_host_t host = MSG_host_self();
25 int nb = MSG_host_get_nb_pstates(host);
26 XBT_INFO("Count of Processor states=%d", nb);
28 double current_peak = MSG_host_get_current_power_peak(host);
29 XBT_INFO("Current power peak=%f", current_peak);
32 msg_task_t task1 = MSG_task_create ("t1", workload, 0, NULL);
33 MSG_task_execute (task1);
34 MSG_task_destroy(task1);
36 double task_time = MSG_get_clock();
37 XBT_INFO("Task1 simulation time: %e", task_time);
40 if ((new_pstate >= nb) || (new_pstate < 0)) {
41 XBT_INFO("Cannot set pstate %d, host supports only %d pstates", new_pstate, nb);
45 double peak_at = MSG_host_get_power_peak_at(host, new_pstate);
46 XBT_INFO("Changing power peak value to %f (at index %d)", peak_at, new_pstate);
48 MSG_host_set_pstate(host, new_pstate);
50 current_peak = MSG_host_get_current_power_peak(host);
51 XBT_INFO("Current power peak=%f", current_peak);
54 task1 = MSG_task_create ("t1", workload, 0, NULL);
55 MSG_task_execute (task1);
56 MSG_task_destroy(task1);
58 task_time = MSG_get_clock() - task_time;
59 XBT_INFO("Task2 simulation time: %e", task_time);
61 // Verify the default pstate is set to 0
62 host = MSG_host_by_name("MyHost2");
63 int nb2 = MSG_host_get_nb_pstates(host);
64 XBT_INFO("Count of Processor states=%d", nb2);
66 double current_peak2 = MSG_host_get_current_power_peak(host);
67 XBT_INFO("Current power peak=%f", current_peak2);
71 int main(int argc, char *argv[])
73 MSG_init(&argc, argv);
75 xbt_assert(argc == 2, "Usage: %s platform_file\n\tExample: %s msg_platform.xml\n", argv[0], argv[0]);
77 MSG_create_environment(argv[1]);
79 MSG_process_create("dvfs_test", dvfs, NULL, MSG_get_host_by_name("MyHost1"));
80 MSG_process_create("dvfs_test", dvfs, NULL, MSG_get_host_by_name("MyHost2"));
82 msg_error_t res = MSG_main();
84 XBT_INFO("Total simulation time: %e", MSG_get_clock());