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/SimcallObserver.hpp"
  14 #include "src/kernel/resource/DiskImpl.hpp"
  15 #include "src/mc/mc_replay.hpp"
  16 #include "src/simix/smx_private.hpp"
  17 #include "src/surf/cpu_interface.hpp"
  18
  19 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_io, simix, "Logging specific to SIMIX (io)");
  20
  21 namespace simgrid {
  22 namespace kernel {
  23 namespace activity {
  24
  25 IoImpl::IoImpl()
  26 {
  27   piface_ = new s4u::Io(this);
  28 }
  29
  30 IoImpl& IoImpl::set_timeout(double timeout)
  31 {
  32   const s4u::Host* host = get_disk()->get_host();
  33   timeout_detector_     = host->get_cpu()->sleep(timeout);
  34   timeout_detector_->set_activity(this);
  35   return *this;
  36 }
  37
  38 IoImpl& IoImpl::set_type(s4u::Io::OpType type)
  39 {
  40   type_ = type;
  41   return *this;
  42 }
  43
  44 IoImpl& IoImpl::set_size(sg_size_t size)
  45 {
  46   size_ = size;
  47   return *this;
  48 }
  49
  50 IoImpl& IoImpl::set_disk(resource::DiskImpl* disk)
  51 {
  52   disk_ = disk;
  53   return *this;
  54 }
  55
  56 IoImpl* IoImpl::start()
  57 {
  58   state_ = State::RUNNING;
  59   surf_action_ =
  60       disk_->get_host()->get_netpoint()->get_englobing_zone()->get_disk_model()->io_start(disk_, size_, type_);
  61   surf_action_->set_activity(this);
  62
  63   XBT_DEBUG("Create IO synchro %p %s", this, get_cname());
  64
  65   return this;
  66 }
  67
  68 void IoImpl::post()
  69 {
  70   performed_ioops_ = surf_action_->get_cost();
  71   if (surf_action_->get_state() == resource::Action::State::FAILED) {
  72     if (disk_ && not disk_->is_on())
  73       state_ = State::FAILED;
  74     else
  75       state_ = State::CANCELED;
  76   } else if (timeout_detector_ && timeout_detector_->get_state() == resource::Action::State::FINISHED) {
  77     if (surf_action_->get_remains() > 0.0) {
  78       surf_action_->set_state(resource::Action::State::FAILED);
  79       state_ = State::TIMEOUT;
  80     } else {
  81       state_ = State::DONE;
  82     }
  83   } else {
  84     state_ = State::DONE;
  85   }
  86
  87   clean_action();
  88   if (timeout_detector_) {
  89     timeout_detector_->unref();
  90     timeout_detector_ = nullptr;
  91   }
  92
  93   /* Answer all simcalls associated with the synchro */
  94   finish();
  95 }
  96
  97 void IoImpl::finish()
  98 {
  99   XBT_DEBUG("IoImpl::finish() in state %s", to_c_str(state_));
 100   while (not simcalls_.empty()) {
 101     smx_simcall_t simcall = simcalls_.front();
 102     simcalls_.pop_front();
 103
 104     /* If a waitany simcall is waiting for this synchro to finish, then remove it from the other synchros in the waitany
 105      * list. Afterwards, get the position of the actual synchro in the waitany list and return it as the result of the
 106      * simcall */
 107
 108     if (simcall->call_ == simix::Simcall::NONE) // FIXME: maybe a better way to handle this case
 109       continue;                                 // if process handling comm is killed
 110     if (auto* observer = dynamic_cast<kernel::actor::IoWaitanySimcall*>(simcall->observer_)) { // simcall is a wait_any?
 111       const auto& ios = observer->get_ios();
 112
 113       for (auto* io : ios) {
 114         io->unregister_simcall(simcall);
 115
 116         if (simcall->timeout_cb_) {
 117           simcall->timeout_cb_->remove();
 118           simcall->timeout_cb_ = nullptr;
 119         }
 120       }
 121
 122       if (not MC_is_active() && not MC_record_replay_is_active()) {
 123         auto element = std::find(ios.begin(), ios.end(), this);
 124         int rank     = element != ios.end() ? static_cast<int>(std::distance(ios.begin(), element)) : -1;
 125         observer->set_result(rank);
 126       }
 127     }
 128
 129     switch (state_) {
 130       case State::FAILED:
 131         simcall->issuer_->context_->set_wannadie();
 132         piface_->complete(s4u::Activity::State::FAILED);
 133         simcall->issuer_->exception_ =
 134             std::make_exception_ptr(StorageFailureException(XBT_THROW_POINT, "Storage failed"));
 135         break;
 136       case State::CANCELED:
 137         simcall->issuer_->exception_ = std::make_exception_ptr(CancelException(XBT_THROW_POINT, "I/O Canceled"));
 138         break;
 139       case State::TIMEOUT:
 140         simcall->issuer_->exception_ = std::make_exception_ptr(TimeoutException(XBT_THROW_POINT, "Timeouted"));
 141         break;
 142       default:
 143         xbt_assert(state_ == State::DONE, "Internal error in IoImpl::finish(): unexpected synchro state %s",
 144                    to_c_str(state_));
 145     }
 146
 147     simcall->issuer_->waiting_synchro_ = nullptr;
 148     simcall->issuer_->simcall_answer();
 149   }
 150 }
 151
 152 void IoImpl::wait_any_for(actor::ActorImpl* issuer, const std::vector<IoImpl*>& ios, double timeout)
 153 {
 154   if (timeout < 0.0) {
 155     issuer->simcall_.timeout_cb_ = nullptr;
 156   } else {
 157     issuer->simcall_.timeout_cb_ = timer::Timer::set(s4u::Engine::get_clock() + timeout, [issuer, &ios]() {
 158       issuer->simcall_.timeout_cb_ = nullptr;
 159       for (auto* io : ios)
 160         io->unregister_simcall(&issuer->simcall_);
 161       // default result (-1) is set in actor::IoWaitanySimcall
 162       issuer->simcall_answer();
 163     });
 164   }
 165
 166   for (auto* io : ios) {
 167     /* associate this simcall to the the synchro */
 168     io->simcalls_.push_back(&issuer->simcall_);
 169
 170     /* see if the synchro is already finished */
 171     if (io->state_ != State::WAITING && io->state_ != State::RUNNING) {
 172       io->finish();
 173       break;
 174     }
 175   }
 176 }
 177
 178 } // namespace activity
 179 } // namespace kernel
 180 } // namespace simgrid