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::update_sharing_penalty(double sharing_penalty)
  38 {
  39   sharing_penalty_ = sharing_penalty;
  40   surf_action_->set_sharing_penalty(sharing_penalty);
  41   return *this;
  42 }
  43
  44 IoImpl& IoImpl::set_timeout(double timeout)
  45 {
  46   const s4u::Host* host = get_disk()->get_host();
  47   timeout_detector_     = host->get_cpu()->sleep(timeout);
  48   timeout_detector_->set_activity(this);
  49   return *this;
  50 }
  51
  52 IoImpl& IoImpl::set_type(s4u::Io::OpType type)
  53 {
  54   type_ = type;
  55   return *this;
  56 }
  57
  58 IoImpl& IoImpl::set_size(sg_size_t size)
  59 {
  60   size_ = size;
  61   return *this;
  62 }
  63
  64 IoImpl& IoImpl::set_disk(resource::DiskImpl* disk)
  65 {
  66   disk_ = disk;
  67   return *this;
  68 }
  69
  70 IoImpl* IoImpl::start()
  71 {
  72   state_ = State::RUNNING;
  73   surf_action_ =
  74       disk_->get_host()->get_netpoint()->get_englobing_zone()->get_disk_model()->io_start(disk_, size_, type_);
  75   surf_action_->set_sharing_penalty(sharing_penalty_);
  76   surf_action_->set_activity(this);
  77
  78   XBT_DEBUG("Create IO synchro %p %s", this, get_cname());
  79
  80   return this;
  81 }
  82
  83 void IoImpl::post()
  84 {
  85   performed_ioops_ = surf_action_->get_cost();
  86   if (surf_action_->get_state() == resource::Action::State::FAILED) {
  87     if (disk_ && not disk_->is_on())
  88       state_ = State::FAILED;
  89     else
  90       state_ = State::CANCELED;
  91   } else if (timeout_detector_ && timeout_detector_->get_state() == resource::Action::State::FINISHED) {
  92     if (surf_action_->get_remains() > 0.0) {
  93       surf_action_->set_state(resource::Action::State::FAILED);
  94       state_ = State::TIMEOUT;
  95     } else {
  96       state_ = State::DONE;
  97     }
  98   } else {
  99     state_ = State::DONE;
 100   }
 101
 102   clean_action();
 103   if (timeout_detector_) {
 104     timeout_detector_->unref();
 105     timeout_detector_ = nullptr;
 106   }
 107
 108   /* Answer all simcalls associated with the synchro */
 109   finish();
 110 }
 111
 112 void IoImpl::finish()
 113 {
 114   XBT_DEBUG("IoImpl::finish() in state %s", to_c_str(state_));
 115   while (not simcalls_.empty()) {
 116     smx_simcall_t simcall = simcalls_.front();
 117     simcalls_.pop_front();
 118
 119     /* If a waitany simcall is waiting for this synchro to finish, then remove it from the other synchros in the waitany
 120      * list. Afterwards, get the position of the actual synchro in the waitany list and return it as the result of the
 121      * simcall */
 122
 123     if (simcall->call_ == simix::Simcall::NONE) // FIXME: maybe a better way to handle this case
 124       continue;                                 // if process handling comm is killed
 125     if (auto* observer = dynamic_cast<kernel::actor::IoWaitanySimcall*>(simcall->observer_)) { // simcall is a wait_any?
 126       const auto& ios = observer->get_ios();
 127
 128       for (auto* io : ios) {
 129         io->unregister_simcall(simcall);
 130
 131         if (simcall->timeout_cb_) {
 132           simcall->timeout_cb_->remove();
 133           simcall->timeout_cb_ = nullptr;
 134         }
 135       }
 136
 137       if (not MC_is_active() && not MC_record_replay_is_active()) {
 138         auto element = std::find(ios.begin(), ios.end(), this);
 139         int rank     = element != ios.end() ? static_cast<int>(std::distance(ios.begin(), element)) : -1;
 140         observer->set_result(rank);
 141       }
 142     }
 143
 144     switch (state_) {
 145       case State::FAILED:
 146         simcall->issuer_->context_->set_wannadie();
 147         piface_->complete(s4u::Activity::State::FAILED);
 148         simcall->issuer_->exception_ =
 149             std::make_exception_ptr(StorageFailureException(XBT_THROW_POINT, "Storage failed"));
 150         break;
 151       case State::CANCELED:
 152         simcall->issuer_->exception_ = std::make_exception_ptr(CancelException(XBT_THROW_POINT, "I/O Canceled"));
 153         break;
 154       case State::TIMEOUT:
 155         simcall->issuer_->exception_ = std::make_exception_ptr(TimeoutException(XBT_THROW_POINT, "Timeouted"));
 156         break;
 157       default:
 158         xbt_assert(state_ == State::DONE, "Internal error in IoImpl::finish(): unexpected synchro state %s",
 159                    to_c_str(state_));
 160     }
 161
 162     simcall->issuer_->waiting_synchro_ = nullptr;
 163     simcall->issuer_->simcall_answer();
 164   }
 165 }
 166
 167 void IoImpl::wait_any_for(actor::ActorImpl* issuer, const std::vector<IoImpl*>& ios, double timeout)
 168 {
 169   if (timeout < 0.0) {
 170     issuer->simcall_.timeout_cb_ = nullptr;
 171   } else {
 172     issuer->simcall_.timeout_cb_ = timer::Timer::set(s4u::Engine::get_clock() + timeout, [issuer, &ios]() {
 173       issuer->simcall_.timeout_cb_ = nullptr;
 174       for (auto* io : ios)
 175         io->unregister_simcall(&issuer->simcall_);
 176       // default result (-1) is set in actor::IoWaitanySimcall
 177       issuer->simcall_answer();
 178     });
 179   }
 180
 181   for (auto* io : ios) {
 182     /* associate this simcall to the the synchro */
 183     io->simcalls_.push_back(&issuer->simcall_);
 184
 185     /* see if the synchro is already finished */
 186     if (io->state_ != State::WAITING && io->state_ != State::RUNNING) {
 187       io->finish();
 188       break;
 189     }
 190   }
 191 }
 192
 193 } // namespace activity
 194 } // namespace kernel
 195 } // namespace simgrid