src/kernel/activity/IoImpl.cpp

   1 /* Copyright (c) 2007-2021. 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 #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/cpu_interface.hpp"
  14
  15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_io, simix, "Logging specific to SIMIX (io)");
  16
  17 namespace simgrid {
  18 namespace kernel {
  19 namespace activity {
  20
  21 IoImpl& IoImpl::set_timeout(double timeout)
  22 {
  23   const s4u::Host* host = get_disk()->get_host();
  24   timeout_detector_ = host->pimpl_cpu->sleep(timeout);
  25   timeout_detector_->set_activity(this);
  26   return *this;
  27 }
  28
  29 IoImpl& IoImpl::set_type(s4u::Io::OpType type)
  30 {
  31   type_ = type;
  32   return *this;
  33 }
  34
  35 IoImpl& IoImpl::set_size(sg_size_t size)
  36 {
  37   size_ = size;
  38   return *this;
  39 }
  40
  41 IoImpl& IoImpl::set_disk(resource::DiskImpl* disk)
  42 {
  43   disk_ = disk;
  44   return *this;
  45 }
  46
  47 IoImpl* IoImpl::start()
  48 {
  49   state_ = State::RUNNING;
  50   surf_action_ = disk_->io_start(size_, type_);
  51   surf_action_->set_activity(this);
  52
  53   XBT_DEBUG("Create IO synchro %p %s", this, get_cname());
  54
  55   return this;
  56 }
  57
  58 void IoImpl::post()
  59 {
  60   performed_ioops_ = surf_action_->get_cost();
  61   if (surf_action_->get_state() == resource::Action::State::FAILED) {
  62     if (disk_ && not disk_->is_on())
  63       state_ = State::FAILED;
  64     else
  65       state_ = State::CANCELED;
  66   } else if (timeout_detector_ && timeout_detector_->get_state() == resource::Action::State::FINISHED) {
  67     if (surf_action_->get_remains() > 0.0) {
  68       surf_action_->set_state(resource::Action::State::FAILED);
  69       state_ = State::TIMEOUT;
  70     } else {
  71       state_ = State::DONE;
  72     }
  73   } else {
  74     state_ = State::DONE;
  75   }
  76
  77   clean_action();
  78   if (timeout_detector_) {
  79     timeout_detector_->unref();
  80     timeout_detector_ = nullptr;
  81   }
  82
  83   /* Answer all simcalls associated with the synchro */
  84   finish();
  85 }
  86
  87 void IoImpl::finish()
  88 {
  89   while (not simcalls_.empty()) {
  90     const s_smx_simcall* simcall = simcalls_.front();
  91     simcalls_.pop_front();
  92     switch (state_) {
  93       case State::DONE:
  94         /* do nothing, synchro done */
  95         break;
  96       case State::FAILED:
  97         simcall->issuer_->context_->set_wannadie();
  98         simcall->issuer_->exception_ =
  99             std::make_exception_ptr(StorageFailureException(XBT_THROW_POINT, "Storage failed"));
 100         break;
 101       case State::CANCELED:
 102         simcall->issuer_->exception_ = std::make_exception_ptr(CancelException(XBT_THROW_POINT, "I/O Canceled"));
 103         break;
 104       case State::TIMEOUT:
 105         XBT_DEBUG("IoImpl::finish(): execution timeouted");
 106         simcall->issuer_->exception_ = std::make_exception_ptr(simgrid::TimeoutException(XBT_THROW_POINT, "Timeouted"));
 107         break;
 108       default:
 109         xbt_die("Internal error in IoImpl::finish(): unexpected synchro state %d", static_cast<int>(state_));
 110     }
 111
 112     simcall->issuer_->waiting_synchro_ = nullptr;
 113     simcall->issuer_->simcall_answer();
 114   }
 115 }
 116
 117 } // namespace activity
 118 } // namespace kernel
 119 } // namespace simgrid