src/kernel/activity/IoImpl.cpp

   1 /* Copyright (c) 2007-2021. 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/kernel/routing/NetPoint.hpp"
  10 #include "simgrid/s4u/Engine.hpp"
  11 #include "simgrid/s4u/Host.hpp"
  12 #include "simgrid/s4u/Io.hpp"
  13 #include "src/kernel/actor/ActorImpl.hpp"
  14 #include "src/kernel/actor/SimcallObserver.hpp"
  15 #include "src/kernel/context/Context.hpp"
  16 #include "src/kernel/resource/DiskImpl.hpp"
  17 #include "src/mc/mc_replay.hpp"
  18 #include "src/surf/cpu_interface.hpp"
  19
  20 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_io, simix, "Logging specific to SIMIX (io)");
  21
  22 namespace simgrid {
  23 namespace kernel {
  24 namespace activity {
  25
  26 IoImpl::IoImpl()
  27 {
  28   piface_ = new s4u::Io(this);
  29 }
  30
  31 IoImpl& IoImpl::set_timeout(double timeout)
  32 {
  33   const s4u::Host* host = get_disk()->get_host();
  34   timeout_detector_     = host->get_cpu()->sleep(timeout);
  35   timeout_detector_->set_activity(this);
  36   return *this;
  37 }
  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_disk(resource::DiskImpl* disk)
  52 {
  53   disk_ = disk;
  54   return *this;
  55 }
  56
  57 IoImpl* IoImpl::start()
  58 {
  59   state_ = State::RUNNING;
  60   surf_action_ =
  61       disk_->get_host()->get_netpoint()->get_englobing_zone()->get_disk_model()->io_start(disk_, size_, type_);
  62   surf_action_->set_activity(this);
  63
  64   XBT_DEBUG("Create IO synchro %p %s", this, get_cname());
  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 (disk_ && not disk_->is_on())
  74       state_ = State::FAILED;
  75     else
  76       state_ = State::CANCELED;
  77   } else if (timeout_detector_ && timeout_detector_->get_state() == resource::Action::State::FINISHED) {
  78     if (surf_action_->get_remains() > 0.0) {
  79       surf_action_->set_state(resource::Action::State::FAILED);
  80       state_ = State::TIMEOUT;
  81     } else {
  82       state_ = State::DONE;
  83     }
  84   } else {
  85     state_ = State::DONE;
  86   }
  87
  88   clean_action();
  89   if (timeout_detector_) {
  90     timeout_detector_->unref();
  91     timeout_detector_ = nullptr;
  92   }
  93
  94   /* Answer all simcalls associated with the synchro */
  95   finish();
  96 }
  97
  98 void IoImpl::finish()
  99 {
 100   XBT_DEBUG("IoImpl::finish() in state %s", to_c_str(state_));
 101   while (not simcalls_.empty()) {
 102     smx_simcall_t simcall = simcalls_.front();
 103     simcalls_.pop_front();
 104
 105     /* If a waitany simcall is waiting for this synchro to finish, then remove it from the other synchros in the waitany
 106      * list. Afterwards, get the position of the actual synchro in the waitany list and return it as the result of the
 107      * simcall */
 108
 109     if (simcall->call_ == simix::Simcall::NONE) // FIXME: maybe a better way to handle this case
 110       continue;                                 // if process handling comm is killed
 111     if (auto* observer = dynamic_cast<kernel::actor::IoWaitanySimcall*>(simcall->observer_)) { // simcall is a wait_any?
 112       const auto& ios = observer->get_ios();
 113
 114       for (auto* io : ios) {
 115         io->unregister_simcall(simcall);
 116
 117         if (simcall->timeout_cb_) {
 118           simcall->timeout_cb_->remove();
 119           simcall->timeout_cb_ = nullptr;
 120         }
 121       }
 122
 123       if (not MC_is_active() && not MC_record_replay_is_active()) {
 124         auto element = std::find(ios.begin(), ios.end(), this);
 125         int rank     = element != ios.end() ? static_cast<int>(std::distance(ios.begin(), element)) : -1;
 126         observer->set_result(rank);
 127       }
 128     }
 129
 130     switch (state_) {
 131       case State::FAILED:
 132         simcall->issuer_->context_->set_wannadie();
 133         piface_->complete(s4u::Activity::State::FAILED);
 134         simcall->issuer_->exception_ =
 135             std::make_exception_ptr(StorageFailureException(XBT_THROW_POINT, "Storage failed"));
 136         break;
 137       case State::CANCELED:
 138         simcall->issuer_->exception_ = std::make_exception_ptr(CancelException(XBT_THROW_POINT, "I/O Canceled"));
 139         break;
 140       case State::TIMEOUT:
 141         simcall->issuer_->exception_ = std::make_exception_ptr(TimeoutException(XBT_THROW_POINT, "Timeouted"));
 142         break;
 143       default:
 144         xbt_assert(state_ == State::DONE, "Internal error in IoImpl::finish(): unexpected synchro state %s",
 145                    to_c_str(state_));
 146     }
 147
 148     simcall->issuer_->waiting_synchro_ = nullptr;
 149     simcall->issuer_->simcall_answer();
 150   }
 151 }
 152
 153 void IoImpl::wait_any_for(actor::ActorImpl* issuer, const std::vector<IoImpl*>& ios, double timeout)
 154 {
 155   if (timeout < 0.0) {
 156     issuer->simcall_.timeout_cb_ = nullptr;
 157   } else {
 158     issuer->simcall_.timeout_cb_ = timer::Timer::set(s4u::Engine::get_clock() + timeout, [issuer, &ios]() {
 159       issuer->simcall_.timeout_cb_ = nullptr;
 160       for (auto* io : ios)
 161         io->unregister_simcall(&issuer->simcall_);
 162       // default result (-1) is set in actor::IoWaitanySimcall
 163       issuer->simcall_answer();
 164     });
 165   }
 166
 167   for (auto* io : ios) {
 168     /* associate this simcall to the the synchro */
 169     io->simcalls_.push_back(&issuer->simcall_);
 170
 171     /* see if the synchro is already finished */
 172     if (io->state_ != State::WAITING && io->state_ != State::RUNNING) {
 173       io->finish();
 174       break;
 175     }
 176   }
 177 }
 178
 179 } // namespace activity
 180 } // namespace kernel
 181 } // namespace simgrid