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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. */
#include "simgrid/s4u.hpp"
#include "simgrid/plugins/energy.h"
XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_test, "Messages specific for this s4u example");
namespace sg4 = simgrid::s4u;
static void dvfs()
{
sg4::Host* host1 = sg4::Host::by_name("MyHost1");
sg4::Host* host2 = sg4::Host::by_name("MyHost2");
XBT_INFO("Energetic profile: %s", host1->get_property("wattage_per_state"));
XBT_INFO("Initial peak speed=%.0E flop/s; Energy dissipated =%.0E J", host1->get_speed(),
sg_host_get_consumed_energy(host1));
double start = sg4::Engine::get_clock();
XBT_INFO("Sleep for 10 seconds");
sg4::this_actor::sleep_for(10);
XBT_INFO("Done sleeping (duration: %.2f s). Current peak speed=%.0E; Energy dissipated=%.2f J",
sg4::Engine::get_clock() - start, host1->get_speed(), sg_host_get_consumed_energy(host1));
// Execute something
start = sg4::Engine::get_clock();
double flopAmount = 100E6;
XBT_INFO("Run a computation of %.0E flops", flopAmount);
sg4::this_actor::execute(flopAmount);
XBT_INFO(
"Computation done (duration: %.2f s). Current peak speed=%.0E flop/s; Current consumption: from %.0fW to %.0fW"
" depending on load; Energy dissipated=%.0f J",
sg4::Engine::get_clock() - start, host1->get_speed(), sg_host_get_wattmin_at(host1, host1->get_pstate()),
sg_host_get_wattmax_at(host1, host1->get_pstate()), sg_host_get_consumed_energy(host1));
// ========= Change power peak =========
int pstate = 2;
host1->set_pstate(pstate);
XBT_INFO("========= Requesting pstate %d (speed should be of %.0E flop/s and is of %.0E flop/s)", pstate,
host1->get_pstate_speed(pstate), host1->get_speed());
// Run another computation
start = sg4::Engine::get_clock();
XBT_INFO("Run a computation of %.0E flops", flopAmount);
sg4::this_actor::execute(flopAmount);
XBT_INFO("Computation done (duration: %.2f s). Current peak speed=%.0E flop/s; Energy dissipated=%.0f J",
sg4::Engine::get_clock() - start, host1->get_speed(), sg_host_get_consumed_energy(host1));
start = sg4::Engine::get_clock();
XBT_INFO("Sleep for 4 seconds");
sg4::this_actor::sleep_for(4);
XBT_INFO("Done sleeping (duration: %.2f s). Current peak speed=%.0E flop/s; Energy dissipated=%.0f J",
sg4::Engine::get_clock() - start, host1->get_speed(), sg_host_get_consumed_energy(host1));
// =========== Turn the other host off ==========
XBT_INFO("Turning MyHost2 off, and sleeping another 10 seconds. MyHost2 dissipated %.0f J so far.",
sg_host_get_consumed_energy(host2));
host2->turn_off();
start = sg4::Engine::get_clock();
sg4::this_actor::sleep_for(10);
XBT_INFO("Done sleeping (duration: %.2f s). Current peak speed=%.0E flop/s; Energy dissipated=%.0f J",
sg4::Engine::get_clock() - start, host1->get_speed(), sg_host_get_consumed_energy(host1));
}
int main(int argc, char* argv[])
{
sg_host_energy_plugin_init();
sg4::Engine e(&argc, argv);
xbt_assert(argc == 2, "Usage: %s platform_file\n\tExample: %s ../platforms/energy_platform.xml\n", argv[0], argv[0]);
e.load_platform(argv[1]);
e.host_by_name("MyHost1")->add_actor("dvfs_test", dvfs);
e.run();
XBT_INFO("End of simulation.");
return 0;
}
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