examples/cpp/comm-dependent/s4u-comm-dependent.cpp

   1 /* Copyright (c) 2007-2021. The SimGrid Team. All rights reserved.          */
   2
   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. */
   5
   6 #include <simgrid/s4u.hpp>
   7 namespace sg4 = simgrid::s4u;
   8
   9 XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_comm_dependent, "Messages specific for this s4u example");
  10
  11 static void sender(sg4::Mailbox* mailbox)
  12 {
  13   auto* computation_amount = new double(sg4::this_actor::get_host()->get_speed());
  14   sg4::ExecPtr exec        = sg4::this_actor::exec_init(2 * (*computation_amount));
  15   sg4::CommPtr comm        = mailbox->put_init(computation_amount, 7e6);
  16
  17   exec->set_name("exec on sender")->add_successor(comm)->start();
  18   comm->set_name("comm to receiver")->vetoable_start();
  19   exec->wait();
  20   comm->wait();
  21 }
  22
  23 static void receiver(sg4::Mailbox* mailbox)
  24 {
  25   double* received           = nullptr;
  26   double computation_amount  = sg4::this_actor::get_host()->get_speed();
  27   sg4::ExecPtr exec          = sg4::this_actor::exec_init(2 * computation_amount);
  28   sg4::CommPtr comm          = mailbox->get_init()->set_dst_data((void**)&received, sizeof(double));
  29
  30   comm->set_name("comm from sender")->add_successor(exec)->start();
  31   exec->set_name("exec on receiver")->vetoable_start();
  32
  33   comm->wait();
  34   exec->wait();
  35   XBT_INFO("Received: %.0f flops were computed on sender", *received);
  36   delete received;
  37 }
  38
  39 int main(int argc, char* argv[])
  40 {
  41   sg4::Engine e(&argc, argv);
  42   e.load_platform(argv[1]);
  43
  44   sg4::Mailbox* mbox = sg4::Mailbox::by_name("Mailbox");
  45
  46   sg4::Actor::create("sender", sg4::Host::by_name("Tremblay"), sender, mbox);
  47   sg4::Actor::create("receiver", sg4::Host::by_name("Jupiter"), receiver, mbox);
  48
  49   e.run();
  50
  51   XBT_INFO("Simulation time: %.3f", e.get_clock());
  52
  53   return 0;
  54 }