src/kernel/activity/ExecImpl.cpp

   1 /* Copyright (c) 2007-2018. 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), host_(host), surf_action_(surf_action), 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 }
  46
  47 void simgrid::kernel::activity::ExecImpl::resume()
  48 {
  49   XBT_VERB("This exec is resumed (remain: %f)", surf_action_->get_remains());
  50   if (surf_action_ != nullptr)
  51     surf_action_->resume();
  52 }
  53 void simgrid::kernel::activity::ExecImpl::cancel()
  54 {
  55   XBT_VERB("This exec %p is canceled", this);
  56   if (surf_action_ != nullptr)
  57     surf_action_->cancel();
  58 }
  59
  60 double simgrid::kernel::activity::ExecImpl::get_remaining()
  61 {
  62   xbt_assert(host_ != nullptr, "Calling remains() on a parallel execution is not allowed. "
  63                                "We would need to return a vector instead of a scalar. "
  64                                "Did you mean remainingRatio() instead?");
  65
  66   return surf_action_ ? surf_action_->get_remains() : 0;
  67 }
  68
  69 double simgrid::kernel::activity::ExecImpl::get_remaining_ratio()
  70 {
  71   if (host_ ==
  72       nullptr) // parallel task: their remain is already between 0 and 1 (see comment in ExecImpl::get_remaining())
  73     return (surf_action_ == nullptr) ? 0 : surf_action_->get_remains();
  74   else // Actually compute the ratio for sequential tasks
  75     return (surf_action_ == nullptr) ? 0 : surf_action_->get_remains() / surf_action_->get_cost();
  76 }
  77
  78 void simgrid::kernel::activity::ExecImpl::set_bound(double bound)
  79 {
  80   if (surf_action_)
  81     surf_action_->set_bound(bound);
  82 }
  83 void simgrid::kernel::activity::ExecImpl::set_priority(double priority)
  84 {
  85   if (surf_action_)
  86     surf_action_->set_priority(priority);
  87 }
  88
  89 void simgrid::kernel::activity::ExecImpl::post()
  90 {
  91   if (host_ && host_->is_off()) { /* FIXME: handle resource failure for parallel tasks too */
  92     /* If the host running the synchro failed, notice it. This way, the asking
  93      * process can be killed if it runs on that host itself */
  94     state_ = SIMIX_FAILED;
  95   } else if (surf_action_ && surf_action_->get_state() == simgrid::kernel::resource::Action::State::FAILED) {
  96     /* If the host running the synchro didn't fail, then the synchro was canceled */
  97     state_ = SIMIX_CANCELED;
  98   } else if (timeout_detector_ &&
  99              timeout_detector_->get_state() == simgrid::kernel::resource::Action::State::FINISHED) {
 100     state_ = SIMIX_TIMEOUT;
 101   } else {
 102     state_ = SIMIX_DONE;
 103   }
 104
 105   on_completion(this);
 106
 107   if (surf_action_) {
 108     surf_action_->unref();
 109     surf_action_ = nullptr;
 110   }
 111   if (timeout_detector_) {
 112     timeout_detector_->unref();
 113     timeout_detector_ = nullptr;
 114   }
 115
 116   /* If there are simcalls associated with the synchro, then answer them */
 117   if (not simcalls_.empty())
 118     SIMIX_execution_finish(this);
 119 }
 120
 121 simgrid::kernel::activity::ActivityImpl*
 122 simgrid::kernel::activity::ExecImpl::migrate(simgrid::s4u::Host* to)
 123 {
 124
 125   if (not MC_is_active() && not MC_record_replay_is_active()) {
 126     simgrid::kernel::resource::Action* old_action = this->surf_action_;
 127     simgrid::kernel::resource::Action* new_action = to->pimpl_cpu->execution_start(old_action->get_cost());
 128     new_action->set_remains(old_action->get_remains());
 129     new_action->set_data(this);
 130     new_action->set_priority(old_action->get_priority());
 131
 132     // FIXME: the user-defined bound seem to not be kept by LMM, that seem to overwrite it for the multi-core modeling.
 133     // I hope that the user did not provide any.
 134
 135     old_action->set_data(nullptr);
 136     old_action->cancel();
 137     old_action->unref();
 138     this->surf_action_ = new_action;
 139   }
 140
 141   on_migration(this, to);
 142   return this;
 143 }
 144
 145 /*************
 146  * Callbacks *
 147  *************/
 148 simgrid::xbt::signal<void(simgrid::kernel::activity::ExecImplPtr)> simgrid::kernel::activity::ExecImpl::on_creation;
 149 simgrid::xbt::signal<void(simgrid::kernel::activity::ExecImplPtr)> simgrid::kernel::activity::ExecImpl::on_completion;
 150 simgrid::xbt::signal<void(simgrid::kernel::activity::ExecImplPtr, simgrid::s4u::Host*)>
 151     simgrid::kernel::activity::ExecImpl::on_migration;