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
   6 #include <simgrid/Exception.hpp>
   7 #include <simgrid/kernel/routing/NetPoint.hpp>
   8 #include <simgrid/s4u/Engine.hpp>
   9 #include <simgrid/s4u/Host.hpp>
  10
  11 #include "mc/mc.h"
  12 #include "src/kernel/activity/IoImpl.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_sharing_penalty(double sharing_penalty)
  32 {
  33   sharing_penalty_ = sharing_penalty;
  34   return *this;
  35 }
  36
  37 IoImpl& IoImpl::set_timeout(double timeout)
  38 {
  39   const s4u::Host* host = get_disk()->get_host();
  40   timeout_detector_     = host->get_cpu()->sleep(timeout);
  41   timeout_detector_->set_activity(this);
  42   return *this;
  43 }
  44
  45 IoImpl& IoImpl::set_type(s4u::Io::OpType type)
  46 {
  47   type_ = type;
  48   return *this;
  49 }
  50
  51 IoImpl& IoImpl::set_size(sg_size_t size)
  52 {
  53   size_ = size;
  54   return *this;
  55 }
  56
  57 IoImpl& IoImpl::set_disk(resource::DiskImpl* disk)
  58 {
  59   disk_ = disk;
  60   return *this;
  61 }
  62
  63 IoImpl* IoImpl::start()
  64 {
  65   state_ = State::RUNNING;
  66   surf_action_ =
  67       disk_->get_host()->get_netpoint()->get_englobing_zone()->get_disk_model()->io_start(disk_, size_, type_);
  68   surf_action_->set_sharing_penalty(sharing_penalty_);
  69   surf_action_->set_activity(this);
  70
  71   XBT_DEBUG("Create IO synchro %p %s", this, get_cname());
  72
  73   return this;
  74 }
  75
  76 void IoImpl::post()
  77 {
  78   performed_ioops_ = surf_action_->get_cost();
  79   if (surf_action_->get_state() == resource::Action::State::FAILED) {
  80     if (disk_ && not disk_->is_on())
  81       state_ = State::FAILED;
  82     else
  83       state_ = State::CANCELED;
  84   } else if (timeout_detector_ && timeout_detector_->get_state() == resource::Action::State::FINISHED) {
  85     if (surf_action_->get_remains() > 0.0) {
  86       surf_action_->set_state(resource::Action::State::FAILED);
  87       state_ = State::TIMEOUT;
  88     } else {
  89       state_ = State::DONE;
  90     }
  91   } else {
  92     state_ = State::DONE;
  93   }
  94
  95   clean_action();
  96   if (timeout_detector_) {
  97     timeout_detector_->unref();
  98     timeout_detector_ = nullptr;
  99   }
 100
 101   /* Answer all simcalls associated with the synchro */
 102   finish();
 103 }
 104
 105 void IoImpl::finish()
 106 {
 107   XBT_DEBUG("IoImpl::finish() in state %s", to_c_str(state_));
 108   while (not simcalls_.empty()) {
 109     smx_simcall_t simcall = simcalls_.front();
 110     simcalls_.pop_front();
 111
 112     /* If a waitany simcall is waiting for this synchro to finish, then remove it from the other synchros in the waitany
 113      * list. Afterwards, get the position of the actual synchro in the waitany list and return it as the result of the
 114      * simcall */
 115
 116     if (simcall->call_ == simix::Simcall::NONE) // FIXME: maybe a better way to handle this case
 117       continue;                                 // if process handling comm is killed
 118     if (auto* observer = dynamic_cast<kernel::actor::IoWaitanySimcall*>(simcall->observer_)) { // simcall is a wait_any?
 119       const auto& ios = observer->get_ios();
 120
 121       for (auto* io : ios) {
 122         io->unregister_simcall(simcall);
 123
 124         if (simcall->timeout_cb_) {
 125           simcall->timeout_cb_->remove();
 126           simcall->timeout_cb_ = nullptr;
 127         }
 128       }
 129
 130       if (not MC_is_active() && not MC_record_replay_is_active()) {
 131         auto element = std::find(ios.begin(), ios.end(), this);
 132         int rank     = element != ios.end() ? static_cast<int>(std::distance(ios.begin(), element)) : -1;
 133         observer->set_result(rank);
 134       }
 135     }
 136
 137     switch (state_) {
 138       case State::FAILED:
 139         simcall->issuer_->context_->set_wannadie();
 140         piface_->complete(s4u::Activity::State::FAILED);
 141         simcall->issuer_->exception_ =
 142             std::make_exception_ptr(StorageFailureException(XBT_THROW_POINT, "Storage failed"));
 143         break;
 144       case State::CANCELED:
 145         simcall->issuer_->exception_ = std::make_exception_ptr(CancelException(XBT_THROW_POINT, "I/O Canceled"));
 146         break;
 147       case State::TIMEOUT:
 148         simcall->issuer_->exception_ = std::make_exception_ptr(TimeoutException(XBT_THROW_POINT, "Timeouted"));
 149         break;
 150       default:
 151         xbt_assert(state_ == State::DONE, "Internal error in IoImpl::finish(): unexpected synchro state %s",
 152                    to_c_str(state_));
 153     }
 154
 155     simcall->issuer_->waiting_synchro_ = nullptr;
 156     simcall->issuer_->simcall_answer();
 157   }
 158 }
 159
 160 void IoImpl::wait_any_for(actor::ActorImpl* issuer, const std::vector<IoImpl*>& ios, double timeout)
 161 {
 162   if (timeout < 0.0) {
 163     issuer->simcall_.timeout_cb_ = nullptr;
 164   } else {
 165     issuer->simcall_.timeout_cb_ = timer::Timer::set(s4u::Engine::get_clock() + timeout, [issuer, &ios]() {
 166       issuer->simcall_.timeout_cb_ = nullptr;
 167       for (auto* io : ios)
 168         io->unregister_simcall(&issuer->simcall_);
 169       // default result (-1) is set in actor::IoWaitanySimcall
 170       issuer->simcall_answer();
 171     });
 172   }
 173
 174   for (auto* io : ios) {
 175     /* associate this simcall to the the synchro */
 176     io->simcalls_.push_back(&issuer->simcall_);
 177
 178     /* see if the synchro is already finished */
 179     if (io->state_ != State::WAITING && io->state_ != State::RUNNING) {
 180       io->finish();
 181       break;
 182     }
 183   }
 184 }
 185
 186 } // namespace activity
 187 } // namespace kernel
 188 } // namespace simgrid