1 /* Copyright (c) 2007-2017. The SimGrid Team. All rights reserved. */
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. */
6 #include "simgrid/s4u.hpp"
7 #include "simgrid/plugins/load.h"
9 XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_test, "Messages specific for this s4u example");
11 static void execute_load_test()
13 s4u_Host* host = simgrid::s4u::Host::by_name("MyHost1");
15 XBT_INFO("Initial peak speed: %.0E flop/s; number of flops computed so far: %.0E (should be 0) and current average load: %.5f (should be 0)", host->getSpeed(),
16 sg_host_get_computed_flops(host), sg_host_get_avg_load(host));
18 double start = simgrid::s4u::Engine::getClock();
19 XBT_INFO("Sleep for 10 seconds");
20 simgrid::s4u::this_actor::sleep_for(10);
22 double speed = host->getSpeed();
23 XBT_INFO("Done sleeping %.2fs; peak speed: %.0E flop/s; number of flops computed so far: %.0E (nothing should have "
25 simgrid::s4u::Engine::getClock() - start, host->getSpeed(), sg_host_get_computed_flops(host));
28 start = simgrid::s4u::Engine::getClock();
29 XBT_INFO("Run a task of %.0E flops at current speed of %.0E flop/s", 200E6, host->getSpeed());
30 simgrid::s4u::this_actor::execute(200E6);
32 XBT_INFO("Done working on my task; this took %.2fs; current peak speed: %.0E flop/s (when I started the computation, the speed was set to %.0E flop/s); number of flops computed so "
33 "far: %.2E, average load as reported by the HostLoad plugin: %.5f (should be %.5f)",
34 simgrid::s4u::Engine::getClock() - start, host->getSpeed(), speed, sg_host_get_computed_flops(host), sg_host_get_avg_load(host),
35 static_cast<double>(200E6)/(10.5*speed*host->getCoreCount()+(simgrid::s4u::Engine::getClock()-start-0.5)*host->getSpeed()*host->getCoreCount()));
37 // ========= Change power peak =========
39 host->setPstate(pstate);
40 XBT_INFO("========= Requesting pstate %d (speed should be of %.0E flop/s and is of %.0E flop/s, average load is %.5f)", pstate,
41 host->getPstateSpeed(pstate), host->getSpeed(), sg_host_get_avg_load(host));
44 start = simgrid::s4u::Engine::getClock();
45 XBT_INFO("Run a task of %.0E flops", 100E6);
46 simgrid::s4u::this_actor::execute(100E6);
47 XBT_INFO("Done working on my task; this took %.2fs; current peak speed: %.0E flop/s; number of flops computed so "
49 simgrid::s4u::Engine::getClock() - start, host->getSpeed(), sg_host_get_computed_flops(host));
51 start = simgrid::s4u::Engine::getClock();
52 XBT_INFO("========= Requesting a reset of the computation and load counters");
53 sg_host_load_reset(host);
54 XBT_INFO("After reset: %.0E flops computed; load is %.5f", sg_host_get_computed_flops(host), sg_host_get_avg_load(host));
55 XBT_INFO("Sleep for 4 seconds");
56 simgrid::s4u::this_actor::sleep_for(4);
57 XBT_INFO("Done sleeping %.2f s; peak speed: %.0E flop/s; number of flops computed so far: %.0E",
58 simgrid::s4u::Engine::getClock() - start, host->getSpeed(), sg_host_get_computed_flops(host));
60 // =========== Turn the other host off ==========
61 s4u_Host* host2 = simgrid::s4u::Host::by_name("MyHost2");
62 XBT_INFO("Turning MyHost2 off, and sleeping another 10 seconds. MyHost2 computed %.0f flops so far and has an average load of %.5f.",
63 sg_host_get_computed_flops(host2), sg_host_get_avg_load(host2));
65 start = simgrid::s4u::Engine::getClock();
66 simgrid::s4u::this_actor::sleep_for(10);
67 XBT_INFO("Done sleeping %.2f s; peak speed: %.0E flop/s; number of flops computed so far: %.0E",
68 simgrid::s4u::Engine::getClock() - start, host->getSpeed(), sg_host_get_computed_flops(host));
71 static void change_speed()
73 s4u_Host* host = simgrid::s4u::Host::by_name("MyHost1");
74 simgrid::s4u::this_actor::sleep_for(10.5);
75 XBT_INFO("I slept until now, but now I'll change the speed of this host "
76 "while the other process is still computing! This should slow the computation down.");
80 int main(int argc, char* argv[])
82 sg_host_load_plugin_init();
83 simgrid::s4u::Engine e(&argc, argv);
85 xbt_assert(argc == 2, "Usage: %s platform_file\n\tExample: %s msg_platform.xml\n", argv[0], argv[0]);
86 e.loadPlatform(argv[1]);
88 simgrid::s4u::Actor::createActor("load_test", simgrid::s4u::Host::by_name("MyHost1"), execute_load_test);
89 simgrid::s4u::Actor::createActor("change_speed", simgrid::s4u::Host::by_name("MyHost1"), change_speed);
93 XBT_INFO("Total simulation time: %.2f", simgrid::s4u::Engine::getClock());