src/kernel/activity/ExecImpl.cpp

   1 /* Copyright (c) 2007-2019. 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/modelchecker.h"
   7 #include "src/mc/mc_replay.hpp"
   8
   9 #include "src/kernel/activity/ExecImpl.hpp"
  10 #include "src/simix/smx_host_private.hpp"
  11 #include "src/surf/surf_interface.hpp"
  12 #include "src/surf/cpu_interface.hpp"
  13
  14 #include "simgrid/s4u/Host.hpp"
  15
  16 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_process);
  17
  18 simgrid::kernel::activity::ExecImpl::ExecImpl(std::string name, resource::Action* surf_action,
  19                                               resource::Action* timeout_detector, s4u::Host* host)
  20     : ActivityImpl(name, surf_action), host_(host), timeout_detector_(timeout_detector)
  21 {
  22   this->state_ = SIMIX_RUNNING;
  23
  24   surf_action_->set_data(this);
  25   if (timeout_detector != nullptr)
  26     timeout_detector->set_data(this);
  27
  28   XBT_DEBUG("Create exec %p", this);
  29 }
  30
  31 simgrid::kernel::activity::ExecImpl::~ExecImpl()
  32 {
  33   if (surf_action_)
  34     surf_action_->unref();
  35   if (timeout_detector_)
  36     timeout_detector_->unref();
  37   XBT_DEBUG("Destroy exec %p", this);
  38 }
  39
  40 void simgrid::kernel::activity::ExecImpl::suspend()
  41 {
  42   XBT_VERB("This exec is suspended (remain: %f)", surf_action_->get_remains());
  43   if (surf_action_ != nullptr)
  44     surf_action_->suspend();
  45   on_suspended(this);
  46 }
  47
  48 void simgrid::kernel::activity::ExecImpl::resume()
  49 {
  50   XBT_VERB("This exec is resumed (remain: %f)", surf_action_->get_remains());
  51   if (surf_action_ != nullptr)
  52     surf_action_->resume();
  53   on_resumed(this);
  54 }
  55 void simgrid::kernel::activity::ExecImpl::cancel()
  56 {
  57   XBT_VERB("This exec %p is canceled", this);
  58   if (surf_action_ != nullptr)
  59     surf_action_->cancel();
  60 }
  61
  62 double simgrid::kernel::activity::ExecImpl::get_remaining()
  63 {
  64   xbt_assert(host_ != nullptr, "Calling remains() on a parallel execution is not allowed. "
  65                                "We would need to return a vector instead of a scalar. "
  66                                "Did you mean remainingRatio() instead?");
  67
  68   return surf_action_ ? surf_action_->get_remains() : 0;
  69 }
  70
  71 double simgrid::kernel::activity::ExecImpl::get_remaining_ratio()
  72 {
  73   if (host_ ==
  74       nullptr) // parallel task: their remain is already between 0 and 1 (see comment in ExecImpl::get_remaining())
  75     return (surf_action_ == nullptr) ? 0 : surf_action_->get_remains();
  76   else // Actually compute the ratio for sequential tasks
  77     return (surf_action_ == nullptr) ? 0 : surf_action_->get_remains() / surf_action_->get_cost();
  78 }
  79
  80 void simgrid::kernel::activity::ExecImpl::set_bound(double bound)
  81 {
  82   if (surf_action_)
  83     surf_action_->set_bound(bound);
  84 }
  85 void simgrid::kernel::activity::ExecImpl::set_priority(double priority)
  86 {
  87   if (surf_action_)
  88     surf_action_->set_priority(priority);
  89 }
  90
  91 void simgrid::kernel::activity::ExecImpl::set_category(std::string category)
  92 {
  93   if (surf_action_)
  94     surf_action_->set_category(category);
  95 }
  96
  97 void simgrid::kernel::activity::ExecImpl::post()
  98 {
  99   if (host_ && host_->is_off()) { /* FIXME: handle resource failure for parallel tasks too */
 100     /* If the host running the synchro failed, notice it. This way, the asking
 101      * process can be killed if it runs on that host itself */
 102     state_ = SIMIX_FAILED;
 103   } else if (surf_action_ && surf_action_->get_state() == simgrid::kernel::resource::Action::State::FAILED) {
 104     /* If the host running the synchro didn't fail, then the synchro was canceled */
 105     state_ = SIMIX_CANCELED;
 106   } else if (timeout_detector_ &&
 107              timeout_detector_->get_state() == simgrid::kernel::resource::Action::State::FINISHED) {
 108     state_ = SIMIX_TIMEOUT;
 109   } else {
 110     state_ = SIMIX_DONE;
 111   }
 112
 113   on_completion(this);
 114
 115   if (surf_action_) {
 116     surf_action_->unref();
 117     surf_action_ = nullptr;
 118   }
 119   if (timeout_detector_) {
 120     timeout_detector_->unref();
 121     timeout_detector_ = nullptr;
 122   }
 123
 124   /* If there are simcalls associated with the synchro, then answer them */
 125   if (not simcalls_.empty())
 126     SIMIX_execution_finish(this);
 127 }
 128
 129 simgrid::kernel::activity::ActivityImpl*
 130 simgrid::kernel::activity::ExecImpl::migrate(simgrid::s4u::Host* to)
 131 {
 132
 133   if (not MC_is_active() && not MC_record_replay_is_active()) {
 134     simgrid::kernel::resource::Action* old_action = this->surf_action_;
 135     simgrid::kernel::resource::Action* new_action = to->pimpl_cpu->execution_start(old_action->get_cost());
 136     new_action->set_remains(old_action->get_remains());
 137     new_action->set_data(this);
 138     new_action->set_priority(old_action->get_priority());
 139
 140     // FIXME: the user-defined bound seem to not be kept by LMM, that seem to overwrite it for the multi-core modeling.
 141     // I hope that the user did not provide any.
 142
 143     old_action->set_data(nullptr);
 144     old_action->cancel();
 145     old_action->unref();
 146     this->surf_action_ = new_action;
 147   }
 148
 149   on_migration(this, to);
 150   return this;
 151 }
 152
 153 /*************
 154  * Callbacks *
 155  *************/
 156 simgrid::xbt::signal<void(simgrid::kernel::activity::ExecImplPtr)> simgrid::kernel::activity::ExecImpl::on_creation;
 157 simgrid::xbt::signal<void(simgrid::kernel::activity::ExecImplPtr)> simgrid::kernel::activity::ExecImpl::on_completion;
 158 simgrid::xbt::signal<void(simgrid::kernel::activity::ExecImplPtr)> simgrid::kernel::activity::ExecImpl::on_resumed;
 159 simgrid::xbt::signal<void(simgrid::kernel::activity::ExecImplPtr)> simgrid::kernel::activity::ExecImpl::on_suspended;
 160 simgrid::xbt::signal<void(simgrid::kernel::activity::ExecImplPtr, simgrid::s4u::Host*)>
 161     simgrid::kernel::activity::ExecImpl::on_migration;