src/kernel/activity/IoImpl.cpp

   1 /* Copyright (c) 2007-2023. 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
   9 #include "src/kernel/activity/IoImpl.hpp"
  10 #include "src/kernel/actor/ActorImpl.hpp"
  11 #include "src/kernel/resource/DiskImpl.hpp"
  12 #include "src/kernel/resource/HostImpl.hpp"
  13
  14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(ker_io, kernel, "Kernel io-related synchronization");
  15
  16 namespace simgrid::kernel::activity {
  17
  18 IoImpl::IoImpl()
  19 {
  20   piface_ = new s4u::Io(this);
  21   actor::ActorImpl* self = actor::ActorImpl::self();
  22   if (self) {
  23     set_actor(self);
  24     self->activities_.insert(this);
  25   }
  26 }
  27
  28 IoImpl& IoImpl::set_sharing_penalty(double sharing_penalty)
  29 {
  30   sharing_penalty_ = sharing_penalty;
  31   return *this;
  32 }
  33
  34 IoImpl& IoImpl::update_sharing_penalty(double sharing_penalty)
  35 {
  36   sharing_penalty_ = sharing_penalty;
  37   model_action_->set_sharing_penalty(sharing_penalty);
  38   return *this;
  39 }
  40
  41 IoImpl& IoImpl::set_type(s4u::Io::OpType type)
  42 {
  43   type_ = type;
  44   return *this;
  45 }
  46
  47 IoImpl& IoImpl::set_size(sg_size_t size)
  48 {
  49   size_ = size;
  50   return *this;
  51 }
  52
  53 IoImpl& IoImpl::set_disk(resource::DiskImpl* disk)
  54 {
  55   disk_ = disk;
  56   return *this;
  57 }
  58
  59 IoImpl& IoImpl::set_host(s4u::Host* host)
  60 {
  61   host_ = host;
  62   return *this;
  63 }
  64
  65 IoImpl& IoImpl::set_dst_disk(resource::DiskImpl* disk)
  66 {
  67   dst_disk_ = disk;
  68   return *this;
  69 }
  70
  71 IoImpl& IoImpl::set_dst_host(s4u::Host* host)
  72 {
  73   dst_host_ = host;
  74   return *this;
  75 }
  76
  77 IoImpl* IoImpl::start()
  78 {
  79   set_state(State::RUNNING);
  80   if (dst_host_ == nullptr) {
  81     XBT_DEBUG("Starting regular I/O");
  82     model_action_ = disk_->io_start(size_, type_);
  83     model_action_->set_sharing_penalty(sharing_penalty_);
  84   } else {
  85     XBT_DEBUG("Starting streaming I/O");
  86     auto host_model = dst_host_->get_netpoint()->get_englobing_zone()->get_host_model();
  87     model_action_   = host_model->io_stream(host_, disk_, dst_host_, dst_disk_, size_);
  88   }
  89
  90   model_action_->set_activity(this);
  91   set_start_time(model_action_->get_start_time());
  92
  93   XBT_DEBUG("Create IO synchro %p %s", this, get_cname());
  94
  95   return this;
  96 }
  97
  98 void IoImpl::post()
  99 {
 100   if (model_action_ != nullptr) {
 101     performed_ioops_ = model_action_->get_cost();
 102     if (model_action_->get_state() == resource::Action::State::FAILED) {
 103       if (host_ && dst_host_) { // this is an I/O stream
 104         if (not host_->is_on())
 105           set_state(State::SRC_HOST_FAILURE);
 106         else if (not dst_host_->is_on())
 107           set_state(State::DST_HOST_FAILURE);
 108       } else if ((disk_ && not disk_->is_on()) || (dst_disk_ && not dst_disk_->is_on()))
 109         set_state(State::FAILED);
 110       else
 111         set_state(State::CANCELED);
 112     } else {
 113       set_state(State::DONE);
 114     }
 115
 116     clean_action();
 117   }
 118
 119   /* Answer all simcalls associated with the synchro */
 120   finish();
 121 }
 122 void IoImpl::set_exception(actor::ActorImpl* issuer)
 123 {
 124   switch (get_state()) {
 125     case State::FAILED:
 126       issuer->set_wannadie();
 127       static_cast<s4u::Io*>(get_iface())->complete(s4u::Activity::State::FAILED);
 128       issuer->exception_ = std::make_exception_ptr(StorageFailureException(XBT_THROW_POINT, "Storage failed"));
 129       break;
 130     case State::CANCELED:
 131       issuer->exception_ = std::make_exception_ptr(CancelException(XBT_THROW_POINT, "I/O Canceled"));
 132       break;
 133     case State::SRC_HOST_FAILURE:
 134     case State::DST_HOST_FAILURE:
 135        issuer->set_wannadie();
 136        static_cast<s4u::Io*>(get_iface())->complete(s4u::Activity::State::FAILED);
 137        issuer->exception_ = std::make_exception_ptr(StorageFailureException(XBT_THROW_POINT, "Host failed"));
 138       break;
 139     case State::TIMEOUT:
 140       issuer->exception_ = std::make_exception_ptr(TimeoutException(XBT_THROW_POINT, "Timeouted"));
 141       break;
 142     default:
 143       xbt_assert(get_state() == State::DONE, "Internal error in IoImpl::finish(): unexpected synchro state %s",
 144                  get_state_str());
 145   }
 146 }
 147
 148 void IoImpl::finish()
 149 {
 150   XBT_DEBUG("IoImpl::finish() in state %s", get_state_str());
 151   while (not simcalls_.empty()) {
 152     actor::Simcall* simcall = simcalls_.front();
 153     simcalls_.pop_front();
 154
 155     /* If a waitany simcall is waiting for this synchro to finish, then remove it from the other synchros in the waitany
 156      * list. Afterwards, get the position of the actual synchro in the waitany list and return it as the result of the
 157      * simcall */
 158
 159     if (simcall->call_ == actor::Simcall::Type::NONE) // FIXME: maybe a better way to handle this case
 160       continue;                                       // if process handling comm is killed
 161
 162     handle_activity_waitany(simcall);
 163
 164     if (not simcall->issuer_->get_host()->is_on()) {
 165       simcall->issuer_->set_wannadie();
 166     } else {
 167       // Do not answer to dying actors
 168       if (not simcall->issuer_->wannadie()) {
 169         set_exception(simcall->issuer_);
 170         simcall->issuer_->waiting_synchro_ = nullptr;
 171         simcall->issuer_->simcall_answer();
 172       }
 173     }
 174   }
 175 }
 176
 177 } // namespace simgrid::kernel::activity