src/kernel/activity/IoImpl.cpp

   1 /* Copyright (c) 2007-2020. 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 #include "src/kernel/activity/IoImpl.hpp"
   6 #include "mc/mc.h"
   7 #include "simgrid/Exception.hpp"
   8 #include "simgrid/kernel/resource/Action.hpp"
   9 #include "simgrid/s4u/Host.hpp"
  10 #include "src/kernel/resource/DiskImpl.hpp"
  11 #include "src/mc/mc_replay.hpp"
  12 #include "src/simix/smx_private.hpp"
  13 #include "src/surf/StorageImpl.hpp"
  14 #include "src/surf/cpu_interface.hpp"
  15
  16 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_io, simix, "Logging specific to SIMIX (io)");
  17
  18 namespace simgrid {
  19 namespace kernel {
  20 namespace activity {
  21
  22 IoImpl& IoImpl::set_timeout(double timeout)
  23 {
  24   s4u::Host* host   = get_disk() ? get_disk()->get_host() : s4u::Host::by_name(get_storage()->get_host());
  25   timeout_detector_ = host->pimpl_cpu->sleep(timeout);
  26   timeout_detector_->set_activity(this);
  27   return *this;
  28 }
  29
  30 IoImpl& IoImpl::set_type(s4u::Io::OpType type)
  31 {
  32   type_ = type;
  33   return *this;
  34 }
  35
  36 IoImpl& IoImpl::set_size(sg_size_t size)
  37 {
  38   size_ = size;
  39   return *this;
  40 }
  41
  42 IoImpl& IoImpl::set_disk(resource::DiskImpl* disk)
  43 {
  44   disk_ = disk;
  45   return *this;
  46 }
  47
  48 IoImpl& IoImpl::set_storage(resource::StorageImpl* storage)
  49 {
  50   storage_ = storage;
  51   return *this;
  52 }
  53
  54 IoImpl* IoImpl::start()
  55 {
  56   state_ = State::RUNNING;
  57   if (storage_)
  58     surf_action_ = storage_->io_start(size_, type_);
  59   else
  60     surf_action_ = disk_->io_start(size_, type_);
  61   surf_action_->set_activity(this);
  62
  63   XBT_DEBUG("Create IO synchro %p %s", this, get_cname());
  64   IoImpl::on_start(*this);
  65
  66   return this;
  67 }
  68
  69 void IoImpl::post()
  70 {
  71   performed_ioops_ = surf_action_->get_cost();
  72   if (surf_action_->get_state() == resource::Action::State::FAILED) {
  73     if ((storage_ && not storage_->is_on()) || (disk_ && not disk_->is_on()))
  74       state_ = State::FAILED;
  75     else
  76       state_ = State::CANCELED;
  77   } else if (surf_action_->get_state() == resource::Action::State::FINISHED) {
  78     state_ = State::DONE;
  79   } else if (timeout_detector_ && timeout_detector_->get_state() == resource::Action::State::FINISHED) {
  80     state_ = State::TIMEOUT;
  81   }
  82
  83   if (timeout_detector_) {
  84     timeout_detector_->unref();
  85     timeout_detector_ = nullptr;
  86   }
  87
  88   on_completion(*this);
  89
  90   /* Answer all simcalls associated with the synchro */
  91   finish();
  92 }
  93
  94 void IoImpl::finish()
  95 {
  96   while (not simcalls_.empty()) {
  97     const s_smx_simcall* simcall = simcalls_.front();
  98     simcalls_.pop_front();
  99     switch (state_) {
 100       case State::DONE:
 101         /* do nothing, synchro done */
 102         break;
 103       case State::FAILED:
 104         simcall->issuer_->context_->set_wannadie();
 105         simcall->issuer_->exception_ =
 106             std::make_exception_ptr(StorageFailureException(XBT_THROW_POINT, "Storage failed"));
 107         break;
 108       case State::CANCELED:
 109         simcall->issuer_->exception_ = std::make_exception_ptr(CancelException(XBT_THROW_POINT, "I/O Canceled"));
 110         break;
 111       case State::TIMEOUT:
 112         XBT_DEBUG("IoImpl::finish(): execution timeouted");
 113         simcall->issuer_->exception_ = std::make_exception_ptr(simgrid::TimeoutException(XBT_THROW_POINT, "Timeouted"));
 114         break;
 115       default:
 116         xbt_die("Internal error in IoImpl::finish(): unexpected synchro state %d", static_cast<int>(state_));
 117     }
 118
 119     simcall->issuer_->waiting_synchro = nullptr;
 120     simcall->issuer_->simcall_answer();
 121   }
 122 }
 123
 124 /*************
 125  * Callbacks *
 126  *************/
 127 xbt::signal<void(IoImpl const&)> IoImpl::on_start;
 128 xbt::signal<void(IoImpl const&)> IoImpl::on_completion;
 129
 130 } // namespace activity
 131 } // namespace kernel
 132 } // namespace simgrid