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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/actor.h"
#include "simgrid/engine.h"
#include "simgrid/host.h"
#include "simgrid/plugins/energy.h"
#include "xbt/asserts.h"
#include "xbt/config.h"
#include "xbt/log.h"
XBT_LOG_NEW_DEFAULT_CATEGORY(energy_exec, "Messages specific for this example");
static void dvfs(int argc, char* argv[])
{
sg_host_t host = sg_host_by_name("MyHost1");
XBT_INFO("Energetic profile: %s", sg_host_get_property_value(host, "wattage_per_state"));
XBT_INFO("Initial peak speed=%.0E flop/s; Energy dissipated =%.0E J", sg_host_get_speed(host),
sg_host_get_consumed_energy(host));
double start = simgrid_get_clock();
XBT_INFO("Sleep for 10 seconds");
sg_actor_sleep_for(10);
XBT_INFO("Done sleeping (duration: %.2f s). Current peak speed=%.0E; Energy dissipated=%.2f J",
simgrid_get_clock() - start, sg_host_get_speed(host), sg_host_get_consumed_energy(host));
// Run a task
start = simgrid_get_clock();
XBT_INFO("Run a task of %.0E flops", 100E6);
sg_actor_execute(100E6);
XBT_INFO("Task done (duration: %.2f s). Current peak speed=%.0E flop/s; Current consumption: from %.0fW to %.0fW"
" depending on load; Energy dissipated=%.0f J",
simgrid_get_clock() - start, sg_host_get_speed(host), sg_host_get_wattmin_at(host, sg_host_get_pstate(host)),
sg_host_get_wattmax_at(host, sg_host_get_pstate(host)), sg_host_get_consumed_energy(host));
// ========= Change power peak =========
int pstate = 2;
sg_host_set_pstate(host, pstate);
XBT_INFO("========= Requesting pstate %d (speed should be of %.0E flop/s and is of %.0E flop/s)", pstate,
sg_host_get_pstate_speed(host, pstate), sg_host_get_speed(host));
// Run a second task
start = simgrid_get_clock();
XBT_INFO("Run a task of %.0E flops", 100E6);
sg_actor_execute(100E6);
XBT_INFO("Task done (duration: %.2f s). Current peak speed=%.0E flop/s; Energy dissipated=%.0f J",
simgrid_get_clock() - start, sg_host_get_speed(host), sg_host_get_consumed_energy(host));
start = simgrid_get_clock();
XBT_INFO("Sleep for 4 seconds");
sg_actor_sleep_for(4);
XBT_INFO("Done sleeping (duration: %.2f s). Current peak speed=%.0E flop/s; Energy dissipated=%.0f J",
simgrid_get_clock() - start, sg_host_get_speed(host), sg_host_get_consumed_energy(host));
// =========== 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(sg_host_by_name("MyHost2")));
sg_host_turn_off(sg_host_by_name("MyHost2"));
start = simgrid_get_clock();
sg_actor_sleep_for(10);
XBT_INFO("Done sleeping (duration: %.2f s). Current peak speed=%.0E flop/s; Energy dissipated=%.0f J",
simgrid_get_clock() - start, sg_host_get_speed(host), sg_host_get_consumed_energy(host));
}
int main(int argc, char* argv[])
{
simgrid_init(&argc, argv);
sg_cfg_set_string("plugin", "host_energy");
xbt_assert(argc == 2, "Usage: %s platform_file\n\tExample: %s platform.xml\n", argv[0], argv[0]);
simgrid_load_platform(argv[1]);
sg_actor_create("dvfs_test", sg_host_by_name("MyHost1"), &dvfs, 0, NULL);
simgrid_run();
XBT_INFO("End of simulation");
return 0;
}
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