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# Copyright (c) 2007-2025. 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.
"""
Usage: exec-dvfs.py platform_file [other parameters]
"""
import sys
from simgrid import Actor, Engine, Host, this_actor
class Dvfs:
def __call__(self):
workload = 100E6
host = this_actor.get_host()
nb = host.pstate_count
this_actor.info("Count of Processor states={:d}".format(nb))
this_actor.info("Current power peak={:f}".format(host.speed))
# Run a task
this_actor.execute(workload)
task_time = Engine.clock
this_actor.info("Task1 duration: {:.2f}".format(task_time))
# Change power peak
new_pstate = 2
this_actor.info("Changing power peak value to {:f} (at index {:d})".format(host.pstate_speed(new_pstate),
new_pstate))
host.pstate = new_pstate
this_actor.info("Changed power peak={:f}".format(host.speed))
# Run a second task
this_actor.execute(workload)
task_time = Engine.clock - task_time
this_actor.info("Task2 duration: {:.2f}".format(task_time))
# Verify that the default pstate is set to 0
host2 = Host.by_name("MyHost2")
this_actor.info("Count of Processor states={:d}".format(host2.pstate_count))
this_actor.info("Final power peak={:f}".format(host2.speed))
if __name__ == '__main__':
e = Engine(sys.argv)
if len(sys.argv) < 2:
raise AssertionError("Usage: exec-dvfs.py platform_file [other parameters] (got {:d} params)"
.format(len(sys.argv)))
e.load_platform(sys.argv[1])
e.add_actor("dvfs_test", Host.by_name("MyHost1"), Dvfs())
e.add_actor("dvfs_test", Host.by_name("MyHost2"), Dvfs())
e.run()
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