src/kernel/activity/IoImpl.cpp

   1 /* Copyright (c) 2007-2022. 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/resource/CpuImpl.hpp"
  16 #include "src/kernel/resource/DiskImpl.hpp"
  17 #include "src/mc/mc_replay.hpp"
  18
  19 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(ker_io, kernel, "Kernel io-related synchronization");
  20
  21 namespace simgrid {
  22 namespace kernel {
  23 namespace activity {
  24
  25 IoImpl::IoImpl()
  26 {
  27   piface_ = new s4u::Io(this);
  28   actor::ActorImpl* self = actor::ActorImpl::self();
  29   if (self) {
  30     set_actor(self);
  31     self->activities_.emplace_back(this);
  32   }
  33 }
  34
  35 IoImpl& IoImpl::set_sharing_penalty(double sharing_penalty)
  36 {
  37   sharing_penalty_ = sharing_penalty;
  38   return *this;
  39 }
  40
  41 IoImpl& IoImpl::update_sharing_penalty(double sharing_penalty)
  42 {
  43   sharing_penalty_ = sharing_penalty;
  44   surf_action_->set_sharing_penalty(sharing_penalty);
  45   return *this;
  46 }
  47
  48 IoImpl& IoImpl::set_timeout(double timeout)
  49 {
  50   const s4u::Host* host = get_disk()->get_host();
  51   timeout_detector_     = host->get_cpu()->sleep(timeout);
  52   timeout_detector_->set_activity(this);
  53   return *this;
  54 }
  55
  56 IoImpl& IoImpl::set_type(s4u::Io::OpType type)
  57 {
  58   type_ = type;
  59   return *this;
  60 }
  61
  62 IoImpl& IoImpl::set_size(sg_size_t size)
  63 {
  64   size_ = size;
  65   return *this;
  66 }
  67
  68 IoImpl& IoImpl::set_disk(resource::DiskImpl* disk)
  69 {
  70   disk_ = disk;
  71   return *this;
  72 }
  73
  74 IoImpl* IoImpl::start()
  75 {
  76   set_state(State::RUNNING);
  77   surf_action_ =
  78       disk_->get_host()->get_netpoint()->get_englobing_zone()->get_disk_model()->io_start(disk_, size_, type_);
  79   surf_action_->set_sharing_penalty(sharing_penalty_);
  80   surf_action_->set_activity(this);
  81   set_start_time(surf_action_->get_start_time());
  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       set_state(State::FAILED);
  94     else
  95       set_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       set_state(State::TIMEOUT);
 100     } else {
 101       set_state(State::DONE);
 102     }
 103   } else {
 104     set_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 (get_state()) {
 119     case State::FAILED:
 120       issuer->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(get_state() == State::DONE, "Internal error in IoImpl::finish(): unexpected synchro state %s",
 132                  get_state_str());
 133   }
 134 }
 135
 136 void IoImpl::finish()
 137 {
 138   XBT_DEBUG("IoImpl::finish() in state %s", get_state_str());
 139   while (not simcalls_.empty()) {
 140     actor::Simcall* 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_ == actor::Simcall::Type::NONE) // FIXME: maybe a better way to handle this case
 148       continue;                                       // if process handling comm is killed
 149
 150     handle_activity_waitany(simcall);
 151
 152     set_exception(simcall->issuer_);
 153
 154     simcall->issuer_->waiting_synchro_ = nullptr;
 155     simcall->issuer_->simcall_answer();
 156   }
 157 }
 158
 159 } // namespace activity
 160 } // namespace kernel
 161 } // namespace simgrid