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