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->register_simcall(simcall);
  22
  23   /* set surf's synchro */
  24   if (MC_is_active() || MC_record_replay_is_active()) {
  25     synchro->state_ = SIMIX_DONE;
  26     synchro->finish();
  27     return;
  28   }
  29
  30   /* If the synchro is already finished then perform the error handling */
  31   if (synchro->state_ != SIMIX_RUNNING)
  32     synchro->finish();
  33 }
  34
  35 namespace simgrid {
  36 namespace kernel {
  37 namespace activity {
  38
  39 IoImpl& IoImpl::set_type(s4u::Io::OpType type)
  40 {
  41   type_ = type;
  42   return *this;
  43 }
  44
  45 IoImpl& IoImpl::set_size(sg_size_t size)
  46 {
  47   size_ = size;
  48   return *this;
  49 }
  50
  51 IoImpl& IoImpl::set_storage(resource::StorageImpl* storage)
  52 {
  53   storage_ = storage;
  54   return *this;
  55 }
  56
  57 IoImpl* IoImpl::start()
  58 {
  59   state_       = SIMIX_RUNNING;
  60   surf_action_ = storage_->io_start(size_, type_);
  61   surf_action_->set_activity(this);
  62
  63   XBT_DEBUG("Create IO synchro %p %s", this, get_cname());
  64   IoImpl::on_start(*this);
  65
  66   return this;
  67 }
  68
  69 void IoImpl::post()
  70 {
  71   performed_ioops_ = surf_action_->get_cost();
  72   if (surf_action_->get_state() == resource::Action::State::FAILED) {
  73     if (storage_ && not storage_->is_on())
  74       state_ = SIMIX_FAILED;
  75     else
  76       state_ = SIMIX_CANCELED;
  77   } else if (surf_action_->get_state() == resource::Action::State::FINISHED) {
  78     state_ = SIMIX_DONE;
  79   }
  80   on_completion(*this);
  81
  82   finish();
  83 }
  84
  85 void IoImpl::finish()
  86 {
  87   while (not simcalls_.empty()) {
  88     smx_simcall_t simcall = simcalls_.front();
  89     simcalls_.pop_front();
  90     switch (state_) {
  91       case SIMIX_DONE:
  92         /* do nothing, synchro done */
  93         break;
  94       case SIMIX_FAILED:
  95         simcall->issuer->context_->iwannadie = true;
  96         simcall->issuer->exception_ =
  97             std::make_exception_ptr(StorageFailureException(XBT_THROW_POINT, "Storage failed"));
  98         break;
  99       case SIMIX_CANCELED:
 100         simcall->issuer->exception_ = std::make_exception_ptr(CancelException(XBT_THROW_POINT, "I/O Canceled"));
 101         break;
 102       default:
 103         xbt_die("Internal error in IoImpl::finish(): unexpected synchro state %d", static_cast<int>(state_));
 104     }
 105
 106     simcall->issuer->waiting_synchro = nullptr;
 107     SIMIX_simcall_answer(simcall);
 108   }
 109 }
 110
 111 /*************
 112  * Callbacks *
 113  *************/
 114 xbt::signal<void(IoImpl const&)> IoImpl::on_start;
 115 xbt::signal<void(IoImpl const&)> IoImpl::on_completion;
 116
 117 } // namespace activity
 118 } // namespace kernel
 119 } // namespace simgrid