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::set_type(s4u::Io::OpType type)
  41 {
  42   type_ = type;
  43   return *this;
  44 }
  45
  46 IoImpl& IoImpl::set_size(sg_size_t size)
  47 {
  48   size_ = size;
  49   return *this;
  50 }
  51
  52 IoImpl& IoImpl::set_storage(resource::StorageImpl* storage)
  53 {
  54   storage_ = storage;
  55   return *this;
  56 }
  57
  58 IoImpl* IoImpl::start()
  59 {
  60   state_       = SIMIX_RUNNING;
  61   surf_action_ = storage_->io_start(size_, type_);
  62   surf_action_->set_data(this);
  63
  64   XBT_DEBUG("Create IO synchro %p %s", this, get_cname());
  65   IoImpl::on_start(*this);
  66
  67   return this;
  68 }
  69
  70 void IoImpl::cancel()
  71 {
  72   XBT_VERB("This exec %p is canceled", this);
  73   if (surf_action_ != nullptr)
  74     surf_action_->cancel();
  75   state_ = SIMIX_CANCELED;
  76 }
  77
  78 double IoImpl::get_remaining()
  79 {
  80   return surf_action_ ? surf_action_->get_remains() : 0;
  81 }
  82
  83 void IoImpl::post()
  84 {
  85   performed_ioops_ = surf_action_->get_cost();
  86   switch (surf_action_->get_state()) {
  87     case resource::Action::State::FAILED:
  88       state_ = SIMIX_FAILED;
  89       break;
  90     case resource::Action::State::FINISHED:
  91       state_ = SIMIX_DONE;
  92       break;
  93     default:
  94       THROW_IMPOSSIBLE;
  95   }
  96   on_completion(*this);
  97
  98   finish();
  99 }
 100
 101 void IoImpl::finish()
 102 {
 103   for (smx_simcall_t const& simcall : simcalls_) {
 104     switch (state_) {
 105       case SIMIX_DONE:
 106         /* do nothing, synchro done */
 107         break;
 108       case SIMIX_FAILED:
 109         simcall->issuer->exception_ =
 110             std::make_exception_ptr(simgrid::StorageFailureException(XBT_THROW_POINT, "Storage failed"));
 111         break;
 112       case SIMIX_CANCELED:
 113         simcall->issuer->exception_ =
 114             std::make_exception_ptr(simgrid::CancelException(XBT_THROW_POINT, "I/O Canceled"));
 115         break;
 116       default:
 117         xbt_die("Internal error in IoImpl::finish(): unexpected synchro state %d", static_cast<int>(state_));
 118     }
 119
 120     simcall->issuer->waiting_synchro = nullptr;
 121     if (simcall->issuer->get_host()->is_on())
 122       SIMIX_simcall_answer(simcall);
 123     else
 124       simcall->issuer->context_->iwannadie = true;
 125   }
 126 }
 127
 128 /*************
 129  * Callbacks *
 130  *************/
 131 xbt::signal<void(IoImpl const&)> IoImpl::on_start;
 132 xbt::signal<void(IoImpl const&)> IoImpl::on_completion;
 133
 134 } // namespace activity
 135 } // namespace kernel
 136 } // namespace simgrid