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 #include "src/surf/HostImpl.hpp"
  19
  20 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(ker_io, kernel, "Kernel io-related synchronization");
  21
  22 namespace simgrid::kernel::activity {
  23
  24 IoImpl::IoImpl()
  25 {
  26   piface_ = new s4u::Io(this);
  27   actor::ActorImpl* self = actor::ActorImpl::self();
  28   if (self) {
  29     set_actor(self);
  30     self->activities_.insert(this);
  31   }
  32 }
  33
  34 IoImpl& IoImpl::set_sharing_penalty(double sharing_penalty)
  35 {
  36   sharing_penalty_ = sharing_penalty;
  37   return *this;
  38 }
  39
  40 IoImpl& IoImpl::update_sharing_penalty(double sharing_penalty)
  41 {
  42   sharing_penalty_ = sharing_penalty;
  43   surf_action_->set_sharing_penalty(sharing_penalty);
  44   return *this;
  45 }
  46
  47 IoImpl& IoImpl::set_timeout(double timeout)
  48 {
  49   const s4u::Host* host = get_disk()->get_host();
  50   timeout_detector_     = host->get_cpu()->sleep(timeout);
  51   timeout_detector_->set_activity(this);
  52   return *this;
  53 }
  54
  55 IoImpl& IoImpl::set_type(s4u::Io::OpType type)
  56 {
  57   type_ = type;
  58   return *this;
  59 }
  60
  61 IoImpl& IoImpl::set_size(sg_size_t size)
  62 {
  63   size_ = size;
  64   return *this;
  65 }
  66
  67 IoImpl& IoImpl::set_disk(resource::DiskImpl* disk)
  68 {
  69   disk_ = disk;
  70   return *this;
  71 }
  72
  73 IoImpl& IoImpl::set_host(s4u::Host* host)
  74 {
  75   host_ = host;
  76   return *this;
  77 }
  78
  79 IoImpl& IoImpl::set_dst_disk(resource::DiskImpl* disk)
  80 {
  81   dst_disk_ = disk;
  82   return *this;
  83 }
  84
  85 IoImpl& IoImpl::set_dst_host(s4u::Host* host)
  86 {
  87   dst_host_ = host;
  88   return *this;
  89 }
  90
  91 IoImpl* IoImpl::start()
  92 {
  93   set_state(State::RUNNING);
  94   if (dst_host_ == nullptr) {
  95     XBT_DEBUG("Starting regular I/O");
  96     surf_action_ = disk_->io_start(size_, type_);
  97     surf_action_->set_sharing_penalty(sharing_penalty_);
  98   } else {
  99     XBT_DEBUG("Starting streaming I/O");
 100     auto host_model = dst_host_->get_netpoint()->get_englobing_zone()->get_host_model();
 101     surf_action_    = host_model->io_stream(host_, disk_, dst_host_, dst_disk_, size_);
 102   }
 103
 104   surf_action_->set_activity(this);
 105   set_start_time(surf_action_->get_start_time());
 106
 107   XBT_DEBUG("Create IO synchro %p %s", this, get_cname());
 108
 109   return this;
 110 }
 111
 112 void IoImpl::post()
 113 {
 114   performed_ioops_ = surf_action_->get_cost();
 115   if (surf_action_->get_state() == resource::Action::State::FAILED) {
 116     if (host_ && dst_host_) { // this is an I/O stream
 117       if (not host_->is_on())
 118        set_state(State::SRC_HOST_FAILURE);
 119       else if (not dst_host_->is_on())
 120        set_state(State::DST_HOST_FAILURE);
 121     } else if ((disk_ && not disk_->is_on()) || (dst_disk_ && not dst_disk_->is_on()))
 122       set_state(State::FAILED);
 123     else
 124       set_state(State::CANCELED);
 125   } else if (timeout_detector_ && timeout_detector_->get_state() == resource::Action::State::FINISHED) {
 126     if (surf_action_->get_remains() > 0.0) {
 127       surf_action_->set_state(resource::Action::State::FAILED);
 128       set_state(State::TIMEOUT);
 129     } else {
 130       set_state(State::DONE);
 131     }
 132   } else {
 133     set_state(State::DONE);
 134   }
 135
 136   clean_action();
 137   if (timeout_detector_) {
 138     timeout_detector_->unref();
 139     timeout_detector_ = nullptr;
 140   }
 141
 142   /* Answer all simcalls associated with the synchro */
 143   finish();
 144 }
 145 void IoImpl::set_exception(actor::ActorImpl* issuer)
 146 {
 147   switch (get_state()) {
 148     case State::FAILED:
 149       issuer->set_wannadie();
 150       static_cast<s4u::Io*>(get_iface())->complete(s4u::Activity::State::FAILED);
 151       issuer->exception_ = std::make_exception_ptr(StorageFailureException(XBT_THROW_POINT, "Storage failed"));
 152       break;
 153     case State::CANCELED:
 154       issuer->exception_ = std::make_exception_ptr(CancelException(XBT_THROW_POINT, "I/O Canceled"));
 155       break;
 156     case State::SRC_HOST_FAILURE:
 157     case State::DST_HOST_FAILURE:
 158        issuer->set_wannadie();
 159        static_cast<s4u::Io*>(get_iface())->complete(s4u::Activity::State::FAILED);
 160        issuer->exception_ = std::make_exception_ptr(StorageFailureException(XBT_THROW_POINT, "Host failed"));
 161       break;
 162     case State::TIMEOUT:
 163       issuer->exception_ = std::make_exception_ptr(TimeoutException(XBT_THROW_POINT, "Timeouted"));
 164       break;
 165     default:
 166       xbt_assert(get_state() == State::DONE, "Internal error in IoImpl::finish(): unexpected synchro state %s",
 167                  get_state_str());
 168   }
 169 }
 170
 171 void IoImpl::finish()
 172 {
 173   XBT_DEBUG("IoImpl::finish() in state %s", get_state_str());
 174   while (not simcalls_.empty()) {
 175     actor::Simcall* simcall = simcalls_.front();
 176     simcalls_.pop_front();
 177
 178     /* If a waitany simcall is waiting for this synchro to finish, then remove it from the other synchros in the waitany
 179      * list. Afterwards, get the position of the actual synchro in the waitany list and return it as the result of the
 180      * simcall */
 181
 182     if (simcall->call_ == actor::Simcall::Type::NONE) // FIXME: maybe a better way to handle this case
 183       continue;                                       // if process handling comm is killed
 184
 185     handle_activity_waitany(simcall);
 186
 187     if (not simcall->issuer_->get_host()->is_on()) {
 188       simcall->issuer_->set_wannadie();
 189     } else {
 190       // Do not answer to dying actors
 191       if (not simcall->issuer_->wannadie()) {
 192         set_exception(simcall->issuer_);
 193         simcall->issuer_->waiting_synchro_ = nullptr;
 194         simcall->issuer_->simcall_answer();
 195       }
 196     }
 197   }
 198 }
 199
 200 } // namespace simgrid::kernel::activity