examples/python/exec-dvfs/exec-dvfs.py

   1 # Copyright (c) 2007-2019. The SimGrid Team. All rights reserved.
   2 #
   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.
   5
   6 import sys
   7 from simgrid import *
   8
   9
  10 class Dvfs:
  11     def __call__(self):
  12         workload = 100E6
  13         host = this_actor.get_host()
  14
  15         nb = host.get_pstate_count()
  16         this_actor.info("Count of Processor states={:d}".format(nb))
  17
  18         this_actor.info("Current power peak={:f}".format(host.speed))
  19
  20         # Run a task
  21         this_actor.execute(workload)
  22
  23         task_time = Engine.get_clock()
  24         this_actor.info("Task1 duration: {:.2f}".format(task_time))
  25
  26         # Change power peak
  27         new_pstate = 2
  28
  29         this_actor.info("Changing power peak value to {:f} (at index {:d})".format( host.get_pstate_speed(new_pstate), new_pstate))
  30
  31         host.pstate = new_pstate
  32
  33         this_actor.info("Current power peak={:f}".format(host.speed))
  34
  35         # Run a second task
  36         this_actor.execute(workload)
  37
  38         task_time = Engine.get_clock() - task_time
  39         this_actor.info("Task2 duration: {:.2f}".format(task_time))
  40
  41         # Verify that the default pstate is set to 0
  42         host2 = Host.by_name("MyHost2")
  43         this_actor.info("Count of Processor states={:d}".format(host2.get_pstate_count()))
  44
  45         this_actor.info("Current power peak={:f}".format(host2.speed))
  46
  47 if __name__ == '__main__':
  48     e = Engine(sys.argv)
  49     if len(sys.argv) < 2:
  50         raise AssertionError("Usage: exec-dvfs.py platform_file [other parameters] (got {:d} params)".format(len(sys.argv)))
  51
  52     e.load_platform(sys.argv[1])
  53     Actor.create("dvfs_test", Host.by_name("MyHost1"), Dvfs())
  54     Actor.create("dvfs_test", Host.by_name("MyHost2"), Dvfs())
  55
  56     e.run()