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_ =
  76       disk_->get_host()->get_netpoint()->get_englobing_zone()->get_disk_model()->io_start(disk_, size_, type_);
  77   surf_action_->set_sharing_penalty(sharing_penalty_);
  78   surf_action_->set_activity(this);
  79   set_start_time(surf_action_->get_start_time());
  80
  81   XBT_DEBUG("Create IO synchro %p %s", this, get_cname());
  82
  83   return this;
  84 }
  85
  86 void IoImpl::post()
  87 {
  88   performed_ioops_ = surf_action_->get_cost();
  89   if (surf_action_->get_state() == resource::Action::State::FAILED) {
  90     if (disk_ && not disk_->is_on())
  91       set_state(State::FAILED);
  92     else
  93       set_state(State::CANCELED);
  94   } else if (timeout_detector_ && timeout_detector_->get_state() == resource::Action::State::FINISHED) {
  95     if (surf_action_->get_remains() > 0.0) {
  96       surf_action_->set_state(resource::Action::State::FAILED);
  97       set_state(State::TIMEOUT);
  98     } else {
  99       set_state(State::DONE);
 100     }
 101   } else {
 102     set_state(State::DONE);
 103   }
 104
 105   clean_action();
 106   if (timeout_detector_) {
 107     timeout_detector_->unref();
 108     timeout_detector_ = nullptr;
 109   }
 110
 111   /* Answer all simcalls associated with the synchro */
 112   finish();
 113 }
 114 void IoImpl::set_exception(actor::ActorImpl* issuer)
 115 {
 116   switch (get_state()) {
 117     case State::FAILED:
 118       issuer->set_wannadie();
 119       static_cast<s4u::Io*>(get_iface())->complete(s4u::Activity::State::FAILED);
 120       issuer->exception_ = std::make_exception_ptr(StorageFailureException(XBT_THROW_POINT, "Storage failed"));
 121       break;
 122     case State::CANCELED:
 123       issuer->exception_ = std::make_exception_ptr(CancelException(XBT_THROW_POINT, "I/O Canceled"));
 124       break;
 125     case State::TIMEOUT:
 126       issuer->exception_ = std::make_exception_ptr(TimeoutException(XBT_THROW_POINT, "Timeouted"));
 127       break;
 128     default:
 129       xbt_assert(get_state() == State::DONE, "Internal error in IoImpl::finish(): unexpected synchro state %s",
 130                  get_state_str());
 131   }
 132 }
 133
 134 void IoImpl::finish()
 135 {
 136   XBT_DEBUG("IoImpl::finish() in state %s", get_state_str());
 137   while (not simcalls_.empty()) {
 138     actor::Simcall* simcall = simcalls_.front();
 139     simcalls_.pop_front();
 140
 141     /* If a waitany simcall is waiting for this synchro to finish, then remove it from the other synchros in the waitany
 142      * list. Afterwards, get the position of the actual synchro in the waitany list and return it as the result of the
 143      * simcall */
 144
 145     if (simcall->call_ == actor::Simcall::Type::NONE) // FIXME: maybe a better way to handle this case
 146       continue;                                       // if process handling comm is killed
 147
 148     handle_activity_waitany(simcall);
 149
 150     set_exception(simcall->issuer_);
 151
 152     simcall->issuer_->waiting_synchro_ = nullptr;
 153     simcall->issuer_->simcall_answer();
 154   }
 155 }
 156
 157 } // namespace simgrid::kernel::activity