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 IoImplPtr IoImpl::set_name(const std::string& name)
  41 {
  42   ActivityImpl::set_name(name);
  43   return this;
  44 }
  45
  46 IoImplPtr IoImpl::set_type(s4u::Io::OpType type)
  47 {
  48   type_ = type;
  49   return this;
  50 }
  51
  52 IoImplPtr IoImpl::set_size(sg_size_t size)
  53 {
  54   size_ = size;
  55   return this;
  56 }
  57
  58 IoImplPtr IoImpl::set_storage(resource::StorageImpl* storage)
  59 {
  60   storage_ = storage;
  61   return this;
  62 }
  63
  64 IoImpl* IoImpl::start()
  65 {
  66   state_       = SIMIX_RUNNING;
  67   surf_action_ = storage_->io_start(size_, type_);
  68   surf_action_->set_data(this);
  69
  70   XBT_DEBUG("Create IO synchro %p %s", this, get_cname());
  71   IoImpl::on_start(this);
  72
  73   return this;
  74 }
  75
  76 void IoImpl::cancel()
  77 {
  78   XBT_VERB("This exec %p is canceled", this);
  79   if (surf_action_ != nullptr)
  80     surf_action_->cancel();
  81   state_ = SIMIX_CANCELED;
  82 }
  83
  84 double IoImpl::get_remaining()
  85 {
  86   return surf_action_ ? surf_action_->get_remains() : 0;
  87 }
  88
  89 void IoImpl::post()
  90 {
  91   performed_ioops_ = surf_action_->get_cost();
  92   switch (surf_action_->get_state()) {
  93     case resource::Action::State::FAILED:
  94       state_ = SIMIX_FAILED;
  95       break;
  96     case resource::Action::State::FINISHED:
  97       state_ = SIMIX_DONE;
  98       break;
  99     default:
 100       THROW_IMPOSSIBLE;
 101   }
 102   on_completion(this);
 103
 104   finish();
 105 }
 106
 107 void IoImpl::finish()
 108 {
 109   for (smx_simcall_t const& simcall : simcalls_) {
 110     switch (state_) {
 111       case SIMIX_DONE:
 112         /* do nothing, synchro done */
 113         break;
 114       case SIMIX_FAILED:
 115         simcall->issuer->exception_ =
 116             std::make_exception_ptr(simgrid::StorageFailureException(XBT_THROW_POINT, "Storage failed"));
 117         break;
 118       case SIMIX_CANCELED:
 119         simcall->issuer->exception_ =
 120             std::make_exception_ptr(simgrid::CancelException(XBT_THROW_POINT, "I/O Canceled"));
 121         break;
 122       default:
 123         xbt_die("Internal error in IoImpl::finish(): unexpected synchro state %d", static_cast<int>(state_));
 124     }
 125
 126     simcall->issuer->waiting_synchro = nullptr;
 127     if (simcall->issuer->get_host()->is_on())
 128       SIMIX_simcall_answer(simcall);
 129     else
 130       simcall->issuer->context_->iwannadie = true;
 131   }
 132 }
 133
 134 /*************
 135  * Callbacks *
 136  *************/
 137 xbt::signal<void(IoImplPtr)> IoImpl::on_start;
 138 xbt::signal<void(IoImplPtr)> IoImpl::on_completion;
 139
 140 } // namespace activity
 141 } // namespace kernel
 142 } // namespace simgrid