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_.emplace_back(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 (disk_ && not disk_->is_on())
 117       set_state(State::FAILED);
 118     else
 119       set_state(State::CANCELED);
 120   } else if (timeout_detector_ && timeout_detector_->get_state() == resource::Action::State::FINISHED) {
 121     if (surf_action_->get_remains() > 0.0) {
 122       surf_action_->set_state(resource::Action::State::FAILED);
 123       set_state(State::TIMEOUT);
 124     } else {
 125       set_state(State::DONE);
 126     }
 127   } else {
 128     set_state(State::DONE);
 129   }
 130
 131   clean_action();
 132   if (timeout_detector_) {
 133     timeout_detector_->unref();
 134     timeout_detector_ = nullptr;
 135   }
 136
 137   /* Answer all simcalls associated with the synchro */
 138   finish();
 139 }
 140 void IoImpl::set_exception(actor::ActorImpl* issuer)
 141 {
 142   switch (get_state()) {
 143     case State::FAILED:
 144       issuer->set_wannadie();
 145       static_cast<s4u::Io*>(get_iface())->complete(s4u::Activity::State::FAILED);
 146       issuer->exception_ = std::make_exception_ptr(StorageFailureException(XBT_THROW_POINT, "Storage failed"));
 147       break;
 148     case State::CANCELED:
 149       issuer->exception_ = std::make_exception_ptr(CancelException(XBT_THROW_POINT, "I/O Canceled"));
 150       break;
 151     case State::TIMEOUT:
 152       issuer->exception_ = std::make_exception_ptr(TimeoutException(XBT_THROW_POINT, "Timeouted"));
 153       break;
 154     default:
 155       xbt_assert(get_state() == State::DONE, "Internal error in IoImpl::finish(): unexpected synchro state %s",
 156                  get_state_str());
 157   }
 158 }
 159
 160 void IoImpl::finish()
 161 {
 162   XBT_DEBUG("IoImpl::finish() in state %s", get_state_str());
 163   while (not simcalls_.empty()) {
 164     actor::Simcall* simcall = simcalls_.front();
 165     simcalls_.pop_front();
 166
 167     /* If a waitany simcall is waiting for this synchro to finish, then remove it from the other synchros in the waitany
 168      * list. Afterwards, get the position of the actual synchro in the waitany list and return it as the result of the
 169      * simcall */
 170
 171     if (simcall->call_ == actor::Simcall::Type::NONE) // FIXME: maybe a better way to handle this case
 172       continue;                                       // if process handling comm is killed
 173
 174     handle_activity_waitany(simcall);
 175
 176     set_exception(simcall->issuer_);
 177
 178     simcall->issuer_->waiting_synchro_ = nullptr;
 179     simcall->issuer_->simcall_answer();
 180   }
 181 }
 182
 183 } // namespace simgrid::kernel::activity