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[simgrid.git] / examples / msg / energy / e1 / e1.c

diff --git a/examples/msg/energy/e1/e1.c b/examples/msg/energy/e1/e1.c
index b22013d..1f7dae7 100644 (file)
--- a/examples/msg/energy/e1/e1.c
+++ b/examples/msg/energy/e1/e1.c
@@ -1,11 +1,8 @@
-/* Copyright (c) 2007, 2008, 2009, 2010. The SimGrid Team.
+/* Copyright (c) 2007-2010, 2013. The SimGrid Team.
  * All rights reserved.                                                     */
 
 /* This program is free software; you can redistribute it and/or modify it
  * under the terms of the license (GNU LGPL) which comes with this package. */
-
-#include<stdio.h>
-
 #include "msg/msg.h"
 #include "xbt/sysdep.h"         /* calloc */
 
@@ -13,8 +10,20 @@
 #include "xbt/log.h"
 #include "xbt/asserts.h"
 
-XBT_LOG_NEW_DEFAULT_CATEGORY(msg_test,
-                             "Messages specific for this msg example");
+
+/** @addtogroup MSG_examples
+ *
+ * - <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 accessed/changed
+ *             with @ref MSG_get_host_current_power_peak and @ref
+ *             MSG_set_host_power_peak_at.
+ *             Make sure to read the platform XML file for details on how
+ *             to declare the CPU capacity for each pstate.
+ *
+ */
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(test,
+                             "Pstate properties test");
 
 int dvfs(int argc, char *argv[]);
 
@@ -24,9 +33,9 @@ int dvfs(int argc, char *argv[])
   msg_host_t host = NULL;
   msg_task_t task1 = NULL;
   double task_time = 0;
-  host = MSG_get_host_by_name("MyHost1");
-
-  XBT_INFO("dvfs start");
+  double workload = 100E6;
+  int new_peak_index=2;
+  host = MSG_host_self();; //MSG_get_host_by_name("MyHost1");
 
   int nb = MSG_get_host_nb_pstates(host);
   XBT_INFO("Number of Processor states=%d", nb);
@@ -35,31 +44,44 @@ int dvfs(int argc, char *argv[])
   XBT_INFO("Current power peak=%lf", current_peak);
 
   // Run a task
-  task1 = MSG_task_create ("t1", 100E6, 0, NULL);
+  task1 = MSG_task_create ("t1", workload, 0, NULL);
   MSG_task_execute (task1);
   MSG_task_destroy(task1);
 
   task_time = MSG_get_clock();
   XBT_INFO("Task1 simulation time: %le", task_time);
 
-  // ========= Change power peak =========
-  int peak_index=2;
-  double peak_at = MSG_get_host_power_peak_at(host, peak_index);
-  XBT_INFO("=========Changing power peak value to %lf (at index %d)", peak_at, peak_index);
+  // Change power peak
+  if ((new_peak_index >= nb) || (new_peak_index < 0))
+         {
+         XBT_INFO("Cannot set pstate %d, host supports only %d pstates", new_peak_index, nb);
+         return 0;
+         }
+
+  double peak_at = MSG_get_host_power_peak_at(host, new_peak_index);
+  XBT_INFO("Changing power peak value to %lf (at index %d)", peak_at, new_peak_index);
 
-  MSG_set_host_power_peak_at(host, peak_index);
+  MSG_set_host_power_peak_at(host, new_peak_index);
 
   current_peak = MSG_get_host_current_power_peak(host);
   XBT_INFO("Current power peak=%lf", current_peak);
 
   // Run a second task
-  task1 = MSG_task_create ("t1", 100E6, 0, NULL);
+  task1 = MSG_task_create ("t1", workload, 0, NULL);
   MSG_task_execute (task1);
   MSG_task_destroy(task1);
 
   task_time = MSG_get_clock() - task_time;
   XBT_INFO("Task2 simulation time: %le", task_time);
 
+
+  // Verify the default pstate is set to 0
+  host = MSG_get_host_by_name("MyHost2");
+  int nb2 = MSG_get_host_nb_pstates(host);
+  XBT_INFO("Number of Processor states=%d", nb2);
+
+  double current_peak2 = MSG_get_host_current_power_peak(host);
+  XBT_INFO("Current power peak=%lf", current_peak2);
   return 0;
 }