1 /* Copyright (c) 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/plugins/energy.h"
7 #include <simgrid/s4u.hpp>
11 XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_energyptask, "Messages specific for this s4u example");
15 /* Retrieve the list of all hosts as an array of hosts */
16 int hosts_count = sg_host_count();
17 simgrid::s4u::Host** hosts = sg_host_list();
19 XBT_INFO("First, build a classical parallel task, with 1 Gflop to execute on each node, "
20 "and 10MB to exchange between each pair");
21 double* computation_amounts = new double[hosts_count]();
22 double* communication_amounts = new double[hosts_count * hosts_count]();
24 for (int i = 0; i < hosts_count; i++)
25 computation_amounts[i] = 1e9; // 1 Gflop
27 for (int i = 0; i < hosts_count; i++)
28 for (int j = i + 1; j < hosts_count; j++)
29 communication_amounts[i * hosts_count + j] = 1e7; // 10 MB
31 simgrid::s4u::this_actor::parallel_execute(hosts_count, hosts, computation_amounts, communication_amounts);
33 XBT_INFO("We can do the same with a timeout of one second enabled.");
34 computation_amounts = new double[hosts_count]();
35 communication_amounts = new double[hosts_count * hosts_count]();
37 for (int i = 0; i < hosts_count; i++)
38 computation_amounts[i] = 1e9; // 1 Gflop
40 for (int i = 0; i < hosts_count; i++)
41 for (int j = i + 1; j < hosts_count; j++)
42 communication_amounts[i * hosts_count + j] = 1e7; // 10 MB
45 simgrid::s4u::this_actor::parallel_execute(hosts_count, hosts, computation_amounts, communication_amounts,
46 1.0 /* timeout (in seconds)*/);
47 XBT_WARN("Woops, this did not timeout as expected... Please report that bug.");
49 /* Do nothing this exception on timeout was expected */
52 XBT_INFO("Then, build a parallel task involving only computations and no communication (1 Gflop per node)");
53 computation_amounts = new double[hosts_count]();
54 for (int i = 0; i < hosts_count; i++)
55 computation_amounts[i] = 1e9; // 1 Gflop
56 simgrid::s4u::this_actor::parallel_execute(hosts_count, hosts, computation_amounts, nullptr /* no comm */);
58 XBT_INFO("Then, build a parallel task with no computation nor communication (synchro only)");
59 computation_amounts = new double[hosts_count]();
60 communication_amounts = new double[hosts_count * hosts_count]();
61 simgrid::s4u::this_actor::parallel_execute(hosts_count, hosts, computation_amounts, communication_amounts);
63 XBT_INFO("Finally, trick the ptask to do a 'remote execution', on host %s", hosts[1]->getCname());
64 computation_amounts = new double[1]{1e9};
66 simgrid::s4u::Host* remote[] = {hosts[1]};
67 simgrid::s4u::this_actor::parallel_execute(1, remote, computation_amounts, nullptr);
69 XBT_INFO("Goodbye now!");
73 int main(int argc, char* argv[])
75 simgrid::s4u::Engine e(&argc, argv);
77 xbt_assert(argc <= 3, "1Usage: %s <platform file> [--energy]", argv[0]);
78 xbt_assert(argc >= 2, "2Usage: %s <platform file> [--energy]", argv[0]);
80 if (argc == 3 && argv[2][2] == 'e')
81 sg_host_energy_plugin_init();
83 e.loadPlatform(argv[1]);
85 /* Pick a process, no matter which, from the platform file */
86 simgrid::s4u::Actor::createActor("test", simgrid::s4u::Host::by_name("MyHost1"), runner);
89 XBT_INFO("Simulation done.");