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