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 namespace simgrid {
  18 namespace kernel {
  19 namespace activity {
  20
  21 ExecImpl::ExecImpl(std::string name, std::string tracing_category, resource::Action* timeout_detector, s4u::Host* host)
  22     : ActivityImpl(name), host_(host), timeout_detector_(timeout_detector)
  23 {
  24   this->state_ = SIMIX_RUNNING;
  25   this->set_category(tracing_category);
  26
  27   if (timeout_detector != nullptr)
  28     timeout_detector_->set_data(this);
  29
  30   XBT_DEBUG("Create exec %p", this);
  31 }
  32
  33 ExecImpl::~ExecImpl()
  34 {
  35   if (surf_action_)
  36     surf_action_->unref();
  37   if (timeout_detector_)
  38     timeout_detector_->unref();
  39   XBT_DEBUG("Destroy exec %p", this);
  40 }
  41
  42 void ExecImpl::start(double flops_amount, double priority, double bound)
  43 {
  44   if (not MC_is_active() && not MC_record_replay_is_active()) {
  45     surf_action_ = host_->pimpl_cpu->execution_start(flops_amount);
  46     surf_action_->set_data(this);
  47     surf_action_->set_priority(priority);
  48     if (bound > 0)
  49       surf_action_->set_bound(bound);
  50   }
  51
  52   XBT_DEBUG("Create execute synchro %p: %s", this, name_.c_str());
  53   ExecImpl::on_creation(this);
  54 }
  55
  56 void ExecImpl::cancel()
  57 {
  58   XBT_VERB("This exec %p is canceled", this);
  59   if (surf_action_ != nullptr)
  60     surf_action_->cancel();
  61 }
  62
  63 double ExecImpl::get_remaining()
  64 {
  65   xbt_assert(host_ != nullptr, "Calling remains() on a parallel execution is not allowed. "
  66                                "We would need to return a vector instead of a scalar. "
  67                                "Did you mean remainingRatio() instead?");
  68   return surf_action_ ? surf_action_->get_remains() : 0;
  69 }
  70
  71 double 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 ExecImpl::set_bound(double bound)
  81 {
  82   if (surf_action_)
  83     surf_action_->set_bound(bound);
  84 }
  85 void ExecImpl::set_priority(double priority)
  86 {
  87   if (surf_action_)
  88     surf_action_->set_priority(priority);
  89 }
  90
  91 void ExecImpl::post()
  92 {
  93   if (host_ && host_->is_off()) { /* FIXME: handle resource failure for parallel tasks too */
  94     /* If the host running the synchro failed, notice it. This way, the asking
  95      * process can be killed if it runs on that host itself */
  96     state_ = SIMIX_FAILED;
  97   } else if (surf_action_ && surf_action_->get_state() == resource::Action::State::FAILED) {
  98     /* If the host running the synchro didn't fail, then the synchro was canceled */
  99     state_ = SIMIX_CANCELED;
 100   } else if (timeout_detector_ && timeout_detector_->get_state() == resource::Action::State::FINISHED) {
 101     state_ = SIMIX_TIMEOUT;
 102   } else {
 103     state_ = SIMIX_DONE;
 104   }
 105
 106   on_completion(this);
 107
 108   if (surf_action_) {
 109     surf_action_->unref();
 110     surf_action_ = nullptr;
 111   }
 112   if (timeout_detector_) {
 113     timeout_detector_->unref();
 114     timeout_detector_ = nullptr;
 115   }
 116
 117   /* If there are simcalls associated with the synchro, then answer them */
 118   if (not simcalls_.empty())
 119     SIMIX_execution_finish(this);
 120 }
 121
 122 ActivityImpl* ExecImpl::migrate(simgrid::s4u::Host* to)
 123 {
 124   if (not MC_is_active() && not MC_record_replay_is_active()) {
 125     resource::Action* old_action = this->surf_action_;
 126     resource::Action* new_action = to->pimpl_cpu->execution_start(old_action->get_cost());
 127     new_action->set_remains(old_action->get_remains());
 128     new_action->set_data(this);
 129     new_action->set_priority(old_action->get_priority());
 130
 131     // FIXME: the user-defined bound seem to not be kept by LMM, that seem to overwrite it for the multi-core modeling.
 132     // I hope that the user did not provide any.
 133
 134     old_action->set_data(nullptr);
 135     old_action->cancel();
 136     old_action->unref();
 137     this->surf_action_ = new_action;
 138   }
 139
 140   on_migration(this, to);
 141   return this;
 142 }
 143
 144 /*************
 145  * Callbacks *
 146  *************/
 147 xbt::signal<void(ExecImplPtr)> ExecImpl::on_creation;
 148 xbt::signal<void(ExecImplPtr)> ExecImpl::on_completion;
 149 xbt::signal<void(ExecImplPtr, s4u::Host*)> ExecImpl::on_migration;
 150
 151 } // namespace activity
 152 } // namespace kernel
 153 } // namespace simgrid