src/kernel/activity/IoImpl.cpp

   1 /* Copyright (c) 2007-2019. 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/mc/mc_replay.hpp"
  11 #include "src/simix/smx_private.hpp"
  12 #include "src/surf/StorageImpl.hpp"
  13
  14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_io, simix, "Logging specific to SIMIX (io)");
  15
  16 void simcall_HANDLER_io_wait(smx_simcall_t simcall, simgrid::kernel::activity::IoImpl* synchro)
  17 {
  18   XBT_DEBUG("Wait for execution of synchro %p, state %d", synchro, (int)synchro->state_);
  19
  20   /* Associate this simcall to the synchro */
  21   synchro->simcalls_.push_back(simcall);
  22   simcall->issuer->waiting_synchro = synchro;
  23
  24   /* set surf's synchro */
  25   if (MC_is_active() || MC_record_replay_is_active()) {
  26     synchro->state_ = SIMIX_DONE;
  27     synchro->finish();
  28     return;
  29   }
  30
  31   /* If the synchro is already finished then perform the error handling */
  32   if (synchro->state_ != SIMIX_RUNNING)
  33     synchro->finish();
  34 }
  35
  36 namespace simgrid {
  37 namespace kernel {
  38 namespace activity {
  39
  40 IoImpl::IoImpl(const std::string& name, surf::StorageImpl* storage) : ActivityImpl(name), storage_(storage)
  41 {
  42   this->state_ = SIMIX_RUNNING;
  43
  44   XBT_DEBUG("Create io impl %p", this);
  45 }
  46
  47 IoImpl::~IoImpl()
  48 {
  49   if (surf_action_ != nullptr)
  50     surf_action_->unref();
  51   XBT_DEBUG("Destroy io %p", this);
  52 }
  53
  54 IoImpl* IoImpl::start(sg_size_t size, simgrid::s4u::Io::OpType type)
  55 {
  56   surf_action_ = storage_->io_start(size, type);
  57   surf_action_->set_data(this);
  58
  59   XBT_DEBUG("Create IO synchro %p %s", this, get_cname());
  60   simgrid::kernel::activity::IoImpl::on_start(this);
  61
  62   return this;
  63 }
  64
  65 void IoImpl::cancel()
  66 {
  67   XBT_VERB("This exec %p is canceled", this);
  68   if (surf_action_ != nullptr)
  69     surf_action_->cancel();
  70   state_ = SIMIX_CANCELED;
  71 }
  72
  73 double IoImpl::get_remaining()
  74 {
  75   return surf_action_ ? surf_action_->get_remains() : 0;
  76 }
  77
  78 void IoImpl::post()
  79 {
  80   performed_ioops_ = surf_action_->get_cost();
  81   switch (surf_action_->get_state()) {
  82     case simgrid::kernel::resource::Action::State::FAILED:
  83       state_ = SIMIX_FAILED;
  84       break;
  85     case simgrid::kernel::resource::Action::State::FINISHED:
  86       state_ = SIMIX_DONE;
  87       break;
  88     default:
  89       THROW_IMPOSSIBLE;
  90   }
  91   on_completion(this);
  92
  93   finish();
  94 }
  95
  96 void IoImpl::finish()
  97 {
  98   for (smx_simcall_t const& simcall : simcalls_) {
  99     switch (state_) {
 100       case SIMIX_DONE:
 101         /* do nothing, synchro done */
 102         break;
 103       case SIMIX_FAILED:
 104         simcall->issuer->exception_ =
 105             std::make_exception_ptr(simgrid::StorageFailureException(XBT_THROW_POINT, "Storage failed"));
 106         break;
 107       case SIMIX_CANCELED:
 108         simcall->issuer->exception_ =
 109             std::make_exception_ptr(simgrid::CancelException(XBT_THROW_POINT, "I/O Canceled"));
 110         break;
 111       default:
 112         xbt_die("Internal error in IoImpl::finish(): unexpected synchro state %d", static_cast<int>(state_));
 113     }
 114
 115     simcall->issuer->waiting_synchro = nullptr;
 116     if (simcall->issuer->get_host()->is_on())
 117       SIMIX_simcall_answer(simcall);
 118     else
 119       simcall->issuer->context_->iwannadie = true;
 120   }
 121 }
 122
 123 /*************
 124  * Callbacks *
 125  *************/
 126 xbt::signal<void(IoImplPtr)> IoImpl::on_start;
 127 xbt::signal<void(IoImplPtr)> IoImpl::on_completion;
 128
 129 } // namespace activity
 130 } // namespace kernel
 131 } // namespace simgrid