+/* Copyright (c) 2017. 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/plugins/energy.h"
+#include <simgrid/s4u.hpp>
+#include <xbt/ex.hpp>
+#include <xbt/log.h>
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_energyptask, "Messages specific for this s4u example");
+
+static void runner()
+{
+ /* Retrieve the list of all hosts as an array of hosts */
+ int hosts_count = sg_host_count();
+ simgrid::s4u::Host** hosts = sg_host_list();
+
+ XBT_INFO("First, build a classical parallel task, with 1 Gflop to execute on each node, "
+ "and 10MB to exchange between each pair");
+ double* computation_amounts = new double[hosts_count]();
+ double* communication_amounts = new double[hosts_count * hosts_count]();
+
+ for (int i = 0; i < hosts_count; i++)
+ computation_amounts[i] = 1e9; // 1 Gflop
+
+ for (int i = 0; i < hosts_count; i++)
+ for (int j = i + 1; j < hosts_count; j++)
+ communication_amounts[i * hosts_count + j] = 1e7; // 10 MB
+
+ simgrid::s4u::this_actor::parallel_execute(hosts_count, hosts, computation_amounts, communication_amounts);
+
+ XBT_INFO("We can do the same with a timeout of one second enabled.");
+ computation_amounts = new double[hosts_count]();
+ communication_amounts = new double[hosts_count * hosts_count]();
+
+ for (int i = 0; i < hosts_count; i++)
+ computation_amounts[i] = 1e9; // 1 Gflop
+
+ for (int i = 0; i < hosts_count; i++)
+ for (int j = i + 1; j < hosts_count; j++)
+ communication_amounts[i * hosts_count + j] = 1e7; // 10 MB
+
+ try {
+ simgrid::s4u::this_actor::parallel_execute(hosts_count, hosts, computation_amounts, communication_amounts,
+ 1.0 /* timeout (in seconds)*/);
+ XBT_WARN("Woops, this did not timeout as expected... Please report that bug.");
+ } catch (xbt_ex& e) {
+ /* Do nothing this exception on timeout was expected */
+ }
+
+ XBT_INFO("Then, build a parallel task involving only computations and no communication (1 Gflop per node)");
+ computation_amounts = new double[hosts_count]();
+ for (int i = 0; i < hosts_count; i++)
+ computation_amounts[i] = 1e9; // 1 Gflop
+ simgrid::s4u::this_actor::parallel_execute(hosts_count, hosts, computation_amounts, nullptr /* no comm */);
+
+ XBT_INFO("Then, build a parallel task with no computation nor communication (synchro only)");
+ computation_amounts = new double[hosts_count]();
+ communication_amounts = new double[hosts_count * hosts_count]();
+ simgrid::s4u::this_actor::parallel_execute(hosts_count, hosts, computation_amounts, communication_amounts);
+
+ XBT_INFO("Finally, trick the ptask to do a 'remote execution', on host %s", hosts[1]->getCname());
+ computation_amounts = new double[1]{1e9};
+
+ simgrid::s4u::Host* remote[] = {hosts[1]};
+ simgrid::s4u::this_actor::parallel_execute(1, remote, computation_amounts, nullptr);
+
+ XBT_INFO("Goodbye now!");
+ std::free(hosts);
+}
+
+int main(int argc, char* argv[])
+{
+ simgrid::s4u::Engine e(&argc, argv);
+
+ xbt_assert(argc <= 3, "1Usage: %s <platform file> [--energy]", argv[0]);
+ xbt_assert(argc >= 2, "2Usage: %s <platform file> [--energy]", argv[0]);
+
+ if (argc == 3 && argv[2][2] == 'e')
+ sg_host_energy_plugin_init();
+
+ e.loadPlatform(argv[1]);
+
+ /* Pick a process, no matter which, from the platform file */
+ simgrid::s4u::Actor::createActor("test", simgrid::s4u::Host::by_name("MyHost1"), runner);
+
+ e.run();
+ XBT_INFO("Simulation done.");
+ return 0;
+}
