src/s4u/s4u_Io.cpp

   1 /* Copyright (c) 2018-2022. 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/Disk.hpp>
   7 #include <simgrid/s4u/Io.hpp>
   8 #include <xbt/log.h>
   9
  10 #include "src/kernel/activity/IoImpl.hpp"
  11 #include "src/kernel/actor/ActorImpl.hpp"
  12 #include "src/kernel/actor/SimcallObserver.hpp"
  13
  14 namespace simgrid {
  15 namespace s4u {
  16 xbt::signal<void(Io const&)> Io::on_start;
  17
  18 Io::Io(kernel::activity::IoImplPtr pimpl)
  19 {
  20   pimpl_ = pimpl;
  21 }
  22
  23 IoPtr Io::init()
  24 {
  25   auto pimpl = kernel::activity::IoImplPtr(new kernel::activity::IoImpl());
  26   return IoPtr(static_cast<Io*>(pimpl->get_iface()));
  27 }
  28
  29 Io* Io::start()
  30 {
  31   kernel::actor::simcall(
  32       [this] { (*boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)).set_name(get_name()).start(); });
  33
  34   if (suspended_)
  35     pimpl_->suspend();
  36
  37   state_ = State::STARTED;
  38   on_start(*this);
  39   return this;
  40 }
  41
  42 ssize_t Io::wait_any_for(const std::vector<IoPtr>& ios, double timeout)
  43 {
  44   std::vector<ActivityPtr> activities;
  45   for (const auto& io : ios)
  46     activities.push_back(boost::dynamic_pointer_cast<Activity>(io));
  47   return Activity::wait_any_for(activities, timeout);
  48 }
  49
  50 IoPtr Io::set_disk(const_sg_disk_t disk)
  51 {
  52   xbt_assert(state_ == State::INITED || state_ == State::STARTING, "Cannot set disk once the Io is started");
  53
  54   kernel::actor::simcall(
  55       [this, disk] { boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_disk(disk->get_impl()); });
  56
  57   // Setting the disk may allow to start the activity, let's try
  58   if (state_ == State::STARTING)
  59     vetoable_start();
  60
  61  return this;
  62 }
  63
  64 IoPtr Io::set_priority(double priority)
  65 {
  66   xbt_assert(state_ == State::INITED || state_ == State::STARTING,
  67              "Cannot change the priority of an io after its start");
  68   kernel::actor::simcall([this, priority] {
  69     boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_sharing_penalty(1. / priority);
  70   });
  71   return this;
  72 }
  73
  74 IoPtr Io::set_size(sg_size_t size)
  75 {
  76   xbt_assert(state_ == State::INITED || state_ == State::STARTING, "Cannot set size once the Io is started");
  77   kernel::actor::simcall(
  78       [this, size] { boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_size(size); });
  79   Activity::set_remaining(size);
  80   return this;
  81 }
  82
  83 IoPtr Io::set_op_type(OpType type)
  84 {
  85   xbt_assert(state_ == State::INITED || state_ == State::STARTING, "Cannot set size once the Io is started");
  86   kernel::actor::simcall(
  87       [this, type] { boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_type(type); });
  88   return this;
  89 }
  90
  91 IoPtr Io::update_priority(double priority)
  92 {
  93   kernel::actor::simcall([this, priority] {
  94     boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->update_sharing_penalty(1. / priority);
  95   });
  96   return this;
  97 }
  98
  99 /** @brief Returns the amount of flops that remain to be done */
 100 double Io::get_remaining() const
 101 {
 102   return kernel::actor::simcall(
 103       [this]() { return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_remaining(); });
 104 }
 105
 106 sg_size_t Io::get_performed_ioops() const
 107 {
 108   return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_performed_ioops();
 109 }
 110
 111 bool Io::is_assigned() const
 112 {
 113   return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_disk() != nullptr;
 114 }
 115
 116 } // namespace s4u
 117 } // namespace simgrid