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 "simgrid/s4u/Io.hpp"
  11 #include "src/kernel/resource/DiskImpl.hpp"
  12 #include "src/mc/mc_replay.hpp"
  13 #include "src/simix/smx_private.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()
  23 {
  24   piface_ = new s4u::Io(this);
  25 }
  26
  27 IoImpl& IoImpl::set_timeout(double timeout)
  28 {
  29   const s4u::Host* host = get_disk()->get_host();
  30   timeout_detector_ = host->pimpl_cpu->sleep(timeout);
  31   timeout_detector_->set_activity(this);
  32   return *this;
  33 }
  34
  35 IoImpl& IoImpl::set_type(s4u::Io::OpType type)
  36 {
  37   type_ = type;
  38   return *this;
  39 }
  40
  41 IoImpl& IoImpl::set_size(sg_size_t size)
  42 {
  43   size_ = size;
  44   return *this;
  45 }
  46
  47 IoImpl& IoImpl::set_disk(resource::DiskImpl* disk)
  48 {
  49   disk_ = disk;
  50   return *this;
  51 }
  52
  53 IoImpl* IoImpl::start()
  54 {
  55   state_ = State::RUNNING;
  56   surf_action_ = disk_->io_start(size_, type_);
  57   surf_action_->set_activity(this);
  58
  59   XBT_DEBUG("Create IO synchro %p %s", this, get_cname());
  60
  61   return this;
  62 }
  63
  64 void IoImpl::post()
  65 {
  66   performed_ioops_ = surf_action_->get_cost();
  67   if (surf_action_->get_state() == resource::Action::State::FAILED) {
  68     if (disk_ && not disk_->is_on())
  69       state_ = State::FAILED;
  70     else
  71       state_ = State::CANCELED;
  72   } else if (timeout_detector_ && timeout_detector_->get_state() == resource::Action::State::FINISHED) {
  73     if (surf_action_->get_remains() > 0.0) {
  74       surf_action_->set_state(resource::Action::State::FAILED);
  75       state_ = State::TIMEOUT;
  76     } else {
  77       state_ = State::DONE;
  78     }
  79   } else {
  80     state_ = State::DONE;
  81   }
  82
  83   clean_action();
  84   if (timeout_detector_) {
  85     timeout_detector_->unref();
  86     timeout_detector_ = nullptr;
  87   }
  88
  89   /* Answer all simcalls associated with the synchro */
  90   finish();
  91 }
  92
  93 void IoImpl::finish()
  94 {
  95   XBT_DEBUG("IoImpl::finish() in state %s", to_c_str(state_));
  96   while (not simcalls_.empty()) {
  97     const s_smx_simcall* simcall = simcalls_.front();
  98     simcalls_.pop_front();
  99     switch (state_) {
 100       case State::FAILED:
 101         simcall->issuer_->context_->set_wannadie();
 102         simcall->issuer_->exception_ =
 103             std::make_exception_ptr(StorageFailureException(XBT_THROW_POINT, "Storage failed"));
 104         break;
 105       case State::CANCELED:
 106         simcall->issuer_->exception_ = std::make_exception_ptr(CancelException(XBT_THROW_POINT, "I/O Canceled"));
 107         break;
 108       case State::TIMEOUT:
 109         simcall->issuer_->exception_ = std::make_exception_ptr(TimeoutException(XBT_THROW_POINT, "Timeouted"));
 110         break;
 111       default:
 112         xbt_assert(state_ == State::DONE, "Internal error in IoImpl::finish(): unexpected synchro state %s",
 113                    to_c_str(state_));
 114     }
 115
 116     simcall->issuer_->waiting_synchro_ = nullptr;
 117     simcall->issuer_->simcall_answer();
 118   }
 119 }
 120
 121 } // namespace activity
 122 } // namespace kernel
 123 } // namespace simgrid