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::kernel::activity {
  22
  23 IoImpl::IoImpl()
  24 {
  25   piface_ = new s4u::Io(this);
  26   actor::ActorImpl* self = actor::ActorImpl::self();
  27   if (self) {
  28     set_actor(self);
  29     self->activities_.emplace_back(this);
  30   }
  31 }
  32
  33 IoImpl& IoImpl::set_sharing_penalty(double sharing_penalty)
  34 {
  35   sharing_penalty_ = sharing_penalty;
  36   return *this;
  37 }
  38
  39 IoImpl& IoImpl::update_sharing_penalty(double sharing_penalty)
  40 {
  41   sharing_penalty_ = sharing_penalty;
  42   surf_action_->set_sharing_penalty(sharing_penalty);
  43   return *this;
  44 }
  45
  46 IoImpl& IoImpl::set_timeout(double timeout)
  47 {
  48   const s4u::Host* host = get_disk()->get_host();
  49   timeout_detector_     = host->get_cpu()->sleep(timeout);
  50   timeout_detector_->set_activity(this);
  51   return *this;
  52 }
  53
  54 IoImpl& IoImpl::set_type(s4u::Io::OpType type)
  55 {
  56   type_ = type;
  57   return *this;
  58 }
  59
  60 IoImpl& IoImpl::set_size(sg_size_t size)
  61 {
  62   size_ = size;
  63   return *this;
  64 }
  65
  66 IoImpl& IoImpl::set_disk(resource::DiskImpl* disk)
  67 {
  68   disk_ = disk;
  69   return *this;
  70 }
  71
  72 IoImpl* IoImpl::start()
  73 {
  74   set_state(State::RUNNING);
  75   surf_action_ = disk_->io_start(size_, type_);
  76   surf_action_->set_sharing_penalty(sharing_penalty_);
  77   surf_action_->set_activity(this);
  78   set_start_time(surf_action_->get_start_time());
  79
  80   XBT_DEBUG("Create IO synchro %p %s", this, get_cname());
  81
  82   return this;
  83 }
  84
  85 void IoImpl::post()
  86 {
  87   performed_ioops_ = surf_action_->get_cost();
  88   if (surf_action_->get_state() == resource::Action::State::FAILED) {
  89     if (disk_ && not disk_->is_on())
  90       set_state(State::FAILED);
  91     else
  92       set_state(State::CANCELED);
  93   } else if (timeout_detector_ && timeout_detector_->get_state() == resource::Action::State::FINISHED) {
  94     if (surf_action_->get_remains() > 0.0) {
  95       surf_action_->set_state(resource::Action::State::FAILED);
  96       set_state(State::TIMEOUT);
  97     } else {
  98       set_state(State::DONE);
  99     }
 100   } else {
 101     set_state(State::DONE);
 102   }
 103
 104   clean_action();
 105   if (timeout_detector_) {
 106     timeout_detector_->unref();
 107     timeout_detector_ = nullptr;
 108   }
 109
 110   /* Answer all simcalls associated with the synchro */
 111   finish();
 112 }
 113 void IoImpl::set_exception(actor::ActorImpl* issuer)
 114 {
 115   switch (get_state()) {
 116     case State::FAILED:
 117       issuer->set_wannadie();
 118       static_cast<s4u::Io*>(get_iface())->complete(s4u::Activity::State::FAILED);
 119       issuer->exception_ = std::make_exception_ptr(StorageFailureException(XBT_THROW_POINT, "Storage failed"));
 120       break;
 121     case State::CANCELED:
 122       issuer->exception_ = std::make_exception_ptr(CancelException(XBT_THROW_POINT, "I/O Canceled"));
 123       break;
 124     case State::TIMEOUT:
 125       issuer->exception_ = std::make_exception_ptr(TimeoutException(XBT_THROW_POINT, "Timeouted"));
 126       break;
 127     default:
 128       xbt_assert(get_state() == State::DONE, "Internal error in IoImpl::finish(): unexpected synchro state %s",
 129                  get_state_str());
 130   }
 131 }
 132
 133 void IoImpl::finish()
 134 {
 135   XBT_DEBUG("IoImpl::finish() in state %s", get_state_str());
 136   while (not simcalls_.empty()) {
 137     actor::Simcall* simcall = simcalls_.front();
 138     simcalls_.pop_front();
 139
 140     /* If a waitany simcall is waiting for this synchro to finish, then remove it from the other synchros in the waitany
 141      * list. Afterwards, get the position of the actual synchro in the waitany list and return it as the result of the
 142      * simcall */
 143
 144     if (simcall->call_ == actor::Simcall::Type::NONE) // FIXME: maybe a better way to handle this case
 145       continue;                                       // if process handling comm is killed
 146
 147     handle_activity_waitany(simcall);
 148
 149     set_exception(simcall->issuer_);
 150
 151     simcall->issuer_->waiting_synchro_ = nullptr;
 152     simcall->issuer_->simcall_answer();
 153   }
 154 }
 155
 156 } // namespace simgrid::kernel::activity