examples/cpp/io-dependent/s4u-io-dependent.cpp

   1 /* Copyright (c) 2007-2023. 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 #include <simgrid/plugins/file_system.h>
   8 #include <vector>
   9
  10 XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_test, "Messages specific for this s4u example");
  11 namespace sg4 = simgrid::s4u;
  12
  13 static void test()
  14 {
  15   sg4::ExecPtr bob_compute = sg4::this_actor::exec_init(1e9);
  16   sg4::IoPtr bob_write = sg4::Host::current()->get_disks().front()->io_init(4000000, sg4::Io::OpType::WRITE);
  17   sg4::IoPtr carl_read = sg4::Host::by_name("carl")->get_disks().front()->io_init(4000000, sg4::Io::OpType::READ);
  18   sg4::ExecPtr carl_compute = sg4::Host::by_name("carl")->exec_init(1e9);
  19
  20   sg4::ActivitySet pending_activities ({boost::dynamic_pointer_cast<sg4::Activity>(bob_compute),
  21                                         boost::dynamic_pointer_cast<sg4::Activity>(bob_write),
  22                                         boost::dynamic_pointer_cast<sg4::Activity>(carl_read),
  23                                         boost::dynamic_pointer_cast<sg4::Activity>(carl_compute)});
  24
  25   // Name the activities (for logging purposes only)
  26   bob_compute->set_name("bob compute");
  27   bob_write->set_name("bob write");
  28   carl_read->set_name("carl read");
  29   carl_compute->set_name("carl compute");
  30
  31   // Create the dependencies:
  32   // 'bob_write' is a successor of 'bob_compute'
  33   // 'carl_read' is a successor of 'bob_write'
  34   // 'carl_compute' is a successor of 'carl_read'
  35   bob_compute->add_successor(bob_write);
  36   bob_write->add_successor(carl_read);
  37   carl_read->add_successor(carl_compute);
  38
  39   // Start the activities.
  40   bob_compute->start();
  41   bob_write->start();
  42   carl_read->start();
  43   carl_compute->start();
  44
  45   // wait for the completion of all activities
  46   while (not pending_activities.empty()) {
  47     auto completed_one = pending_activities.wait_any();
  48     if (completed_one != nullptr)
  49       XBT_INFO("Activity '%s' is complete", completed_one->get_cname());
  50   }
  51 }
  52
  53 int main(int argc, char* argv[])
  54 {
  55   sg4::Engine e(&argc, argv);
  56   e.load_platform(argv[1]);
  57
  58   sg4::Actor::create("bob", e.host_by_name("bob"), test);
  59
  60   e.run();
  61
  62   XBT_INFO("Simulation time %g", sg4::Engine::get_clock());
  63
  64   return 0;
  65 }