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/e1/e1.c</b> Shows how a set of pstates can be defined for a host and how the current pstate can be
12 * accessed/changed with @ref MSG_get_host_current_power_peak and @ref MSG_set_host_pstate.
13 * Make sure to read the platform XML file for details on how to declare the CPU capacity for each pstate.
16 XBT_LOG_NEW_DEFAULT_CATEGORY(test, "Pstate properties test");
18 static int dvfs(int argc, char *argv[])
20 double workload = 100E6;
22 msg_host_t host = MSG_host_self();
24 int nb = MSG_host_get_nb_pstates(host);
25 XBT_INFO("Count of Processor states=%d", nb);
27 double current_peak = MSG_host_get_current_power_peak(host);
28 XBT_INFO("Current power peak=%f", current_peak);
31 msg_task_t task1 = MSG_task_create ("t1", workload, 0, NULL);
32 MSG_task_execute (task1);
33 MSG_task_destroy(task1);
35 double task_time = MSG_get_clock();
36 XBT_INFO("Task1 simulation time: %e", task_time);
39 if ((new_peak_index >= nb) || (new_peak_index < 0)){
40 XBT_INFO("Cannot set pstate %d, host supports only %d pstates", new_peak_index, nb);
44 double peak_at = MSG_host_get_power_peak_at(host, new_peak_index);
45 XBT_INFO("Changing power peak value to %f (at index %d)", peak_at, new_peak_index);
47 MSG_host_set_pstate(host, new_peak_index);
49 current_peak = MSG_host_get_current_power_peak(host);
50 XBT_INFO("Current power peak=%f", current_peak);
53 task1 = MSG_task_create ("t1", workload, 0, NULL);
54 MSG_task_execute (task1);
55 MSG_task_destroy(task1);
57 task_time = MSG_get_clock() - task_time;
58 XBT_INFO("Task2 simulation time: %e", task_time);
60 // Verify the default pstate is set to 0
61 host = MSG_host_by_name("MyHost2");
62 int nb2 = MSG_host_get_nb_pstates(host);
63 XBT_INFO("Count of Processor states=%d", nb2);
65 double current_peak2 = MSG_host_get_current_power_peak(host);
66 XBT_INFO("Current power peak=%f", current_peak2);
70 int main(int argc, char *argv[])
72 msg_error_t res = MSG_OK;
74 MSG_init(&argc, argv);
76 xbt_assert(argc == 2, "Usage: %s platform_file\n\tExample: %s msg_platform.xml\n", argv[0], argv[0]);
78 MSG_create_environment(argv[1]);
80 MSG_process_create("dvfs_test", dvfs, NULL, MSG_get_host_by_name("MyHost1"));
81 MSG_process_create("dvfs_test", dvfs, NULL, MSG_get_host_by_name("MyHost2"));
85 XBT_INFO("Total simulation time: %e", MSG_get_clock());