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()
  41 {
  42   if (surf_action_ != nullptr)
  43     surf_action_->unref();
  44   XBT_DEBUG("Destroy io %p", this);
  45 }
  46
  47 IoImplPtr IoImpl::set_name(const std::string& name)
  48 {
  49   ActivityImpl::set_name(name);
  50   return this;
  51 }
  52
  53 IoImplPtr IoImpl::set_type(s4u::Io::OpType type)
  54 {
  55   type_ = type;
  56   return this;
  57 }
  58
  59 IoImplPtr IoImpl::set_size(sg_size_t size)
  60 {
  61   size_ = size;
  62   return this;
  63 }
  64
  65 IoImplPtr IoImpl::set_storage(resource::StorageImpl* storage)
  66 {
  67   storage_ = storage;
  68   return this;
  69 }
  70
  71 IoImpl* IoImpl::start()
  72 {
  73   state_       = SIMIX_RUNNING;
  74   surf_action_ = storage_->io_start(size_, type_);
  75   surf_action_->set_data(this);
  76
  77   XBT_DEBUG("Create IO synchro %p %s", this, get_cname());
  78   IoImpl::on_start(this);
  79
  80   return this;
  81 }
  82
  83 void IoImpl::cancel()
  84 {
  85   XBT_VERB("This exec %p is canceled", this);
  86   if (surf_action_ != nullptr)
  87     surf_action_->cancel();
  88   state_ = SIMIX_CANCELED;
  89 }
  90
  91 double IoImpl::get_remaining()
  92 {
  93   return surf_action_ ? surf_action_->get_remains() : 0;
  94 }
  95
  96 void IoImpl::post()
  97 {
  98   performed_ioops_ = surf_action_->get_cost();
  99   switch (surf_action_->get_state()) {
 100     case resource::Action::State::FAILED:
 101       state_ = SIMIX_FAILED;
 102       break;
 103     case resource::Action::State::FINISHED:
 104       state_ = SIMIX_DONE;
 105       break;
 106     default:
 107       THROW_IMPOSSIBLE;
 108   }
 109   on_completion(this);
 110
 111   finish();
 112 }
 113
 114 void IoImpl::finish()
 115 {
 116   for (smx_simcall_t const& simcall : simcalls_) {
 117     switch (state_) {
 118       case SIMIX_DONE:
 119         /* do nothing, synchro done */
 120         break;
 121       case SIMIX_FAILED:
 122         simcall->issuer->exception_ =
 123             std::make_exception_ptr(simgrid::StorageFailureException(XBT_THROW_POINT, "Storage failed"));
 124         break;
 125       case SIMIX_CANCELED:
 126         simcall->issuer->exception_ =
 127             std::make_exception_ptr(simgrid::CancelException(XBT_THROW_POINT, "I/O Canceled"));
 128         break;
 129       default:
 130         xbt_die("Internal error in IoImpl::finish(): unexpected synchro state %d", static_cast<int>(state_));
 131     }
 132
 133     simcall->issuer->waiting_synchro = nullptr;
 134     if (simcall->issuer->get_host()->is_on())
 135       SIMIX_simcall_answer(simcall);
 136     else
 137       simcall->issuer->context_->iwannadie = true;
 138   }
 139 }
 140
 141 /*************
 142  * Callbacks *
 143  *************/
 144 xbt::signal<void(IoImplPtr)> IoImpl::on_start;
 145 xbt::signal<void(IoImplPtr)> IoImpl::on_completion;
 146
 147 } // namespace activity
 148 } // namespace kernel
 149 } // namespace simgrid