examples/c/energy-exec/energy-exec.c

   1 /* Copyright (c) 2007-2021. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package. */
   6
   7 #include "simgrid/actor.h"
   8 #include "simgrid/engine.h"
   9 #include "simgrid/host.h"
  10 #include "simgrid/plugins/energy.h"
  11 #include "xbt/asserts.h"
  12 #include "xbt/config.h"
  13 #include "xbt/log.h"
  14
  15 XBT_LOG_NEW_DEFAULT_CATEGORY(energy_exec, "Messages specific for this example");
  16
  17 static void dvfs(int argc, char* argv[])
  18 {
  19   sg_host_t host = sg_host_by_name("MyHost1");
  20
  21   XBT_INFO("Energetic profile: %s", sg_host_get_property_value(host, "wattage_per_state"));
  22   XBT_INFO("Initial peak speed=%.0E flop/s; Energy dissipated =%.0E J", sg_host_get_speed(host),
  23            sg_host_get_consumed_energy(host));
  24
  25   double start = simgrid_get_clock();
  26   XBT_INFO("Sleep for 10 seconds");
  27   sg_actor_sleep_for(10);
  28   XBT_INFO("Done sleeping (duration: %.2f s). Current peak speed=%.0E; Energy dissipated=%.2f J",
  29            simgrid_get_clock() - start, sg_host_get_speed(host), sg_host_get_consumed_energy(host));
  30
  31   // Run a task
  32   start = simgrid_get_clock();
  33   XBT_INFO("Run a task of %.0E flops", 100E6);
  34   sg_actor_execute(100E6);
  35   XBT_INFO("Task done (duration: %.2f s). Current peak speed=%.0E flop/s; Current consumption: from %.0fW to %.0fW"
  36            " depending on load; Energy dissipated=%.0f J",
  37            simgrid_get_clock() - start, sg_host_get_speed(host), sg_host_get_wattmin_at(host, sg_host_get_pstate(host)),
  38            sg_host_get_wattmax_at(host, sg_host_get_pstate(host)), sg_host_get_consumed_energy(host));
  39
  40   // ========= Change power peak =========
  41   int pstate = 2;
  42   sg_host_set_pstate(host, pstate);
  43   XBT_INFO("========= Requesting pstate %d (speed should be of %.0E flop/s and is of %.0E flop/s)", pstate,
  44            sg_host_get_pstate_speed(host, pstate), sg_host_get_speed(host));
  45
  46   // Run a second task
  47   start = simgrid_get_clock();
  48   XBT_INFO("Run a task of %.0E flops", 100E6);
  49   sg_actor_execute(100E6);
  50   XBT_INFO("Task done (duration: %.2f s). Current peak speed=%.0E flop/s; Energy dissipated=%.0f J",
  51            simgrid_get_clock() - start, sg_host_get_speed(host), sg_host_get_consumed_energy(host));
  52
  53   start = simgrid_get_clock();
  54   XBT_INFO("Sleep for 4 seconds");
  55   sg_actor_sleep_for(4);
  56   XBT_INFO("Done sleeping (duration: %.2f s). Current peak speed=%.0E flop/s; Energy dissipated=%.0f J",
  57            simgrid_get_clock() - start, sg_host_get_speed(host), sg_host_get_consumed_energy(host));
  58
  59   // =========== Turn the other host off ==========
  60   XBT_INFO("Turning MyHost2 off, and sleeping another 10 seconds. MyHost2 dissipated %.0f J so far.",
  61            sg_host_get_consumed_energy(sg_host_by_name("MyHost2")));
  62   sg_host_turn_off(sg_host_by_name("MyHost2"));
  63   start = simgrid_get_clock();
  64   sg_actor_sleep_for(10);
  65   XBT_INFO("Done sleeping (duration: %.2f s). Current peak speed=%.0E flop/s; Energy dissipated=%.0f J",
  66            simgrid_get_clock() - start, sg_host_get_speed(host), sg_host_get_consumed_energy(host));
  67 }
  68
  69 int main(int argc, char* argv[])
  70 {
  71   simgrid_init(&argc, argv);
  72   sg_cfg_set_string("plugin", "host_energy");
  73
  74   xbt_assert(argc == 2, "Usage: %s platform_file\n\tExample: %s msg_platform.xml\n", argv[0], argv[0]);
  75
  76   simgrid_load_platform(argv[1]);
  77   sg_actor_create("dvfs_test", sg_host_by_name("MyHost1"), dvfs, 0, NULL);
  78
  79   simgrid_run();
  80
  81   XBT_INFO("End of simulation");
  82
  83   return 0;
  84 }