src/s4u/s4u_Io.cpp

   1 /* Copyright (c) 2018-2021. 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/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<kernel::activity::IoImpl*> rios(ios.size());
  45   std::transform(begin(ios), end(ios), begin(rios),
  46                  [](const IoPtr& io) { return static_cast<kernel::activity::IoImpl*>(io->pimpl_.get()); });
  47
  48   kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
  49   kernel::actor::IoWaitanySimcall observer{issuer, rios, timeout};
  50   ssize_t changed_pos = kernel::actor::simcall_blocking(
  51       [&observer] {
  52         kernel::activity::IoImpl::wait_any_for(observer.get_issuer(), observer.get_ios(), observer.get_timeout());
  53       },
  54       &observer);
  55   if (changed_pos != -1)
  56     ios.at(changed_pos)->complete(State::FINISHED);
  57   return changed_pos;
  58 }
  59
  60 IoPtr Io::set_disk(const_sg_disk_t disk)
  61 {
  62   xbt_assert(state_ == State::INITED || state_ == State::STARTING, "Cannot set disk once the Io is started");
  63
  64   kernel::actor::simcall(
  65       [this, disk] { boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_disk(disk->get_impl()); });
  66
  67   // Setting the disk may allow to start the activity, let's try
  68   if (state_ == State::STARTING)
  69     vetoable_start();
  70
  71  return this;
  72 }
  73
  74 IoPtr Io::set_priority(double priority)
  75 {
  76   xbt_assert(state_ == State::INITED || state_ == State::STARTING,
  77              "Cannot change the priority of an io after its start");
  78   kernel::actor::simcall([this, priority] {
  79     boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_sharing_penalty(1. / priority);
  80   });
  81   return this;
  82 }
  83
  84 IoPtr Io::set_size(sg_size_t size)
  85 {
  86   xbt_assert(state_ == State::INITED || state_ == State::STARTING, "Cannot set size once the Io is started");
  87   kernel::actor::simcall(
  88       [this, size] { boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_size(size); });
  89   Activity::set_remaining(size);
  90   return this;
  91 }
  92
  93 IoPtr Io::set_op_type(OpType type)
  94 {
  95   xbt_assert(state_ == State::INITED || state_ == State::STARTING, "Cannot set size once the Io is started");
  96   kernel::actor::simcall(
  97       [this, type] { boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->set_type(type); });
  98   return this;
  99 }
 100
 101 IoPtr Io::update_priority(double priority)
 102 {
 103   kernel::actor::simcall([this, priority] {
 104     boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->update_sharing_penalty(1. / priority);
 105   });
 106   return this;
 107 }
 108
 109 /** @brief Returns the amount of flops that remain to be done */
 110 double Io::get_remaining() const
 111 {
 112   return kernel::actor::simcall(
 113       [this]() { return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_remaining(); });
 114 }
 115
 116 sg_size_t Io::get_performed_ioops() const
 117 {
 118   return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_performed_ioops();
 119 }
 120
 121 bool Io::is_assigned() const
 122 {
 123   return boost::static_pointer_cast<kernel::activity::IoImpl>(pimpl_)->get_disk() != nullptr;
 124 }
 125
 126 } // namespace s4u
 127 } // namespace simgrid