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

   1 /* Copyright (c) 2007-2022. 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
  12 static void test()
  13 {
  14   std::vector<simgrid::s4u::ActivityPtr> pending_activities;
  15
  16   simgrid::s4u::ExecPtr bob_compute = simgrid::s4u::this_actor::exec_init(1e9);
  17   pending_activities.push_back(boost::dynamic_pointer_cast<simgrid::s4u::Activity>(bob_compute));
  18   simgrid::s4u::IoPtr bob_write =
  19       simgrid::s4u::Host::current()->get_disks().front()->io_init(4000000, simgrid::s4u::Io::OpType::WRITE);
  20   pending_activities.push_back(boost::dynamic_pointer_cast<simgrid::s4u::Activity>(bob_write));
  21   simgrid::s4u::IoPtr carl_read =
  22       simgrid::s4u::Host::by_name("carl")->get_disks().front()->io_init(4000000, simgrid::s4u::Io::OpType::READ);
  23   pending_activities.push_back(boost::dynamic_pointer_cast<simgrid::s4u::Activity>(carl_read));
  24   simgrid::s4u::ExecPtr carl_compute = simgrid::s4u::Host::by_name("carl")->exec_init(1e9);
  25   pending_activities.push_back(boost::dynamic_pointer_cast<simgrid::s4u::Activity>(carl_compute));
  26
  27   // Name the activities (for logging purposes only)
  28   bob_compute->set_name("bob compute");
  29   bob_write->set_name("bob write");
  30   carl_read->set_name("carl read");
  31   carl_compute->set_name("carl compute");
  32
  33   // Create the dependencies:
  34   // 'bob_write' is a successor of 'bob_compute'
  35   // 'carl_read' is a successor of 'bob_write'
  36   // 'carl_compute' is a successor of 'carl_read'
  37   bob_compute->add_successor(bob_write);
  38   bob_write->add_successor(carl_read);
  39   carl_read->add_successor(carl_compute);
  40
  41   // Start the activities.
  42   bob_compute->start();
  43   bob_write->vetoable_start();
  44   carl_read->vetoable_start();
  45   carl_compute->vetoable_start();
  46
  47   // wait for the completion of all activities
  48   while (not pending_activities.empty()) {
  49     ssize_t changed_pos = simgrid::s4u::Activity::wait_any(pending_activities);
  50     XBT_INFO("Activity '%s' is complete", pending_activities[changed_pos]->get_cname());
  51     pending_activities.erase(pending_activities.begin() + changed_pos);
  52   }
  53 }
  54
  55 int main(int argc, char* argv[])
  56 {
  57   simgrid::s4u::Engine e(&argc, argv);
  58   sg_storage_file_system_init();
  59   e.load_platform(argv[1]);
  60
  61   simgrid::s4u::Actor::create("bob", e.host_by_name("bob"), test);
  62
  63   e.run();
  64
  65   XBT_INFO("Simulation time %g", simgrid::s4u::Engine::get_clock());
  66
  67   return 0;
  68 }