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/CpuImpl.hpp"
  17 #include "src/kernel/resource/DiskImpl.hpp"
  18 #include "src/mc/mc_replay.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   actor::ActorImpl* self = actor::ActorImpl::self();
  30   if (self) {
  31     set_actor(self);
  32     self->activities_.emplace_back(this);
  33   }
  34 }
  35
  36 IoImpl& IoImpl::set_sharing_penalty(double sharing_penalty)
  37 {
  38   sharing_penalty_ = sharing_penalty;
  39   return *this;
  40 }
  41
  42 IoImpl& IoImpl::update_sharing_penalty(double sharing_penalty)
  43 {
  44   sharing_penalty_ = sharing_penalty;
  45   surf_action_->set_sharing_penalty(sharing_penalty);
  46   return *this;
  47 }
  48
  49 IoImpl& IoImpl::set_timeout(double timeout)
  50 {
  51   const s4u::Host* host = get_disk()->get_host();
  52   timeout_detector_     = host->get_cpu()->sleep(timeout);
  53   timeout_detector_->set_activity(this);
  54   return *this;
  55 }
  56
  57 IoImpl& IoImpl::set_type(s4u::Io::OpType type)
  58 {
  59   type_ = type;
  60   return *this;
  61 }
  62
  63 IoImpl& IoImpl::set_size(sg_size_t size)
  64 {
  65   size_ = size;
  66   return *this;
  67 }
  68
  69 IoImpl& IoImpl::set_disk(resource::DiskImpl* disk)
  70 {
  71   disk_ = disk;
  72   return *this;
  73 }
  74
  75 IoImpl* IoImpl::start()
  76 {
  77   state_ = State::RUNNING;
  78   surf_action_ =
  79       disk_->get_host()->get_netpoint()->get_englobing_zone()->get_disk_model()->io_start(disk_, size_, type_);
  80   surf_action_->set_sharing_penalty(sharing_penalty_);
  81   surf_action_->set_activity(this);
  82
  83   XBT_DEBUG("Create IO synchro %p %s", this, get_cname());
  84
  85   return this;
  86 }
  87
  88 void IoImpl::post()
  89 {
  90   performed_ioops_ = surf_action_->get_cost();
  91   if (surf_action_->get_state() == resource::Action::State::FAILED) {
  92     if (disk_ && not disk_->is_on())
  93       state_ = State::FAILED;
  94     else
  95       state_ = State::CANCELED;
  96   } else if (timeout_detector_ && timeout_detector_->get_state() == resource::Action::State::FINISHED) {
  97     if (surf_action_->get_remains() > 0.0) {
  98       surf_action_->set_state(resource::Action::State::FAILED);
  99       state_ = State::TIMEOUT;
 100     } else {
 101       state_ = State::DONE;
 102     }
 103   } else {
 104     state_ = State::DONE;
 105   }
 106
 107   clean_action();
 108   if (timeout_detector_) {
 109     timeout_detector_->unref();
 110     timeout_detector_ = nullptr;
 111   }
 112
 113   /* Answer all simcalls associated with the synchro */
 114   finish();
 115 }
 116 void IoImpl::set_exception(actor::ActorImpl* issuer)
 117 {
 118   switch (state_) {
 119     case State::FAILED:
 120       issuer->context_->set_wannadie();
 121       static_cast<s4u::Io*>(get_iface())->complete(s4u::Activity::State::FAILED);
 122       issuer->exception_ = std::make_exception_ptr(StorageFailureException(XBT_THROW_POINT, "Storage failed"));
 123       break;
 124     case State::CANCELED:
 125       issuer->exception_ = std::make_exception_ptr(CancelException(XBT_THROW_POINT, "I/O Canceled"));
 126       break;
 127     case State::TIMEOUT:
 128       issuer->exception_ = std::make_exception_ptr(TimeoutException(XBT_THROW_POINT, "Timeouted"));
 129       break;
 130     default:
 131       xbt_assert(state_ == State::DONE, "Internal error in IoImpl::finish(): unexpected synchro state %s",
 132                  to_c_str(state_));
 133   }
 134 }
 135
 136 void IoImpl::finish()
 137 {
 138   XBT_DEBUG("IoImpl::finish() in state %s", to_c_str(state_));
 139   while (not simcalls_.empty()) {
 140     smx_simcall_t simcall = simcalls_.front();
 141     simcalls_.pop_front();
 142
 143     /* If a waitany simcall is waiting for this synchro to finish, then remove it from the other synchros in the waitany
 144      * list. Afterwards, get the position of the actual synchro in the waitany list and return it as the result of the
 145      * simcall */
 146
 147     if (simcall->call_ == simix::Simcall::NONE) // FIXME: maybe a better way to handle this case
 148       continue;                                 // if process handling comm is killed
 149     if (auto* observer = dynamic_cast<kernel::actor::IoWaitanySimcall*>(simcall->observer_)) { // simcall is a wait_any?
 150       const auto& ios = observer->get_ios();
 151
 152       for (auto* io : ios) {
 153         io->unregister_simcall(simcall);
 154
 155         if (simcall->timeout_cb_) {
 156           simcall->timeout_cb_->remove();
 157           simcall->timeout_cb_ = nullptr;
 158         }
 159       }
 160
 161       if (not MC_is_active() && not MC_record_replay_is_active()) {
 162         auto element = std::find(ios.begin(), ios.end(), this);
 163         int rank     = element != ios.end() ? static_cast<int>(std::distance(ios.begin(), element)) : -1;
 164         observer->set_result(rank);
 165       }
 166     }
 167
 168     set_exception(simcall->issuer_);
 169
 170     simcall->issuer_->waiting_synchro_ = nullptr;
 171     simcall->issuer_->simcall_answer();
 172   }
 173 }
 174
 175 void IoImpl::wait_any_for(actor::ActorImpl* issuer, const std::vector<IoImpl*>& ios, double timeout)
 176 {
 177   if (timeout < 0.0) {
 178     issuer->simcall_.timeout_cb_ = nullptr;
 179   } else {
 180     issuer->simcall_.timeout_cb_ = timer::Timer::set(s4u::Engine::get_clock() + timeout, [issuer, &ios]() {
 181       issuer->simcall_.timeout_cb_ = nullptr;
 182       for (auto* io : ios)
 183         io->unregister_simcall(&issuer->simcall_);
 184       // default result (-1) is set in actor::IoWaitanySimcall
 185       issuer->simcall_answer();
 186     });
 187   }
 188
 189   for (auto* io : ios) {
 190     /* associate this simcall to the the synchro */
 191     io->simcalls_.push_back(&issuer->simcall_);
 192
 193     /* see if the synchro is already finished */
 194     if (io->state_ != State::WAITING && io->state_ != State::RUNNING) {
 195       io->finish();
 196       break;
 197     }
 198   }
 199 }
 200
 201 } // namespace activity
 202 } // namespace kernel
 203 } // namespace simgrid