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, std::string tracing_category,
  19                                               resource::Action* timeout_detector, s4u::Host* host)
  20     : ActivityImpl(name), host_(host), timeout_detector_(timeout_detector)
  21 {
  22   this->state_ = SIMIX_RUNNING;
  23   this->set_category(tracing_category);
  24
  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::start(double flops_amount, double priority, double bound)
  41 {
  42   if (not MC_is_active() && not MC_record_replay_is_active()) {
  43     surf_action_ = host_->pimpl_cpu->execution_start(flops_amount);
  44     surf_action_->set_data(this);
  45     surf_action_->set_priority(priority);
  46     if (bound > 0)
  47       surf_action_->set_bound(bound);
  48   }
  49
  50   XBT_DEBUG("Create execute synchro %p: %s", this, name_.c_str());
  51   simgrid::kernel::activity::ExecImpl::on_creation(this);
  52 }
  53
  54 void simgrid::kernel::activity::ExecImpl::suspend()
  55 {
  56   XBT_VERB("This exec is suspended (remain: %f)", surf_action_->get_remains());
  57   if (surf_action_ != nullptr)
  58     surf_action_->suspend();
  59   on_suspended(this);
  60 }
  61
  62 void simgrid::kernel::activity::ExecImpl::resume()
  63 {
  64   XBT_VERB("This exec is resumed (remain: %f)", surf_action_->get_remains());
  65   if (surf_action_ != nullptr)
  66     surf_action_->resume();
  67   on_resumed(this);
  68 }
  69 void simgrid::kernel::activity::ExecImpl::cancel()
  70 {
  71   XBT_VERB("This exec %p is canceled", this);
  72   if (surf_action_ != nullptr)
  73     surf_action_->cancel();
  74 }
  75
  76 double simgrid::kernel::activity::ExecImpl::get_remaining()
  77 {
  78   xbt_assert(host_ != nullptr, "Calling remains() on a parallel execution is not allowed. "
  79                                "We would need to return a vector instead of a scalar. "
  80                                "Did you mean remainingRatio() instead?");
  81
  82   return surf_action_ ? surf_action_->get_remains() : 0;
  83 }
  84
  85 double simgrid::kernel::activity::ExecImpl::get_remaining_ratio()
  86 {
  87   if (host_ ==
  88       nullptr) // parallel task: their remain is already between 0 and 1 (see comment in ExecImpl::get_remaining())
  89     return (surf_action_ == nullptr) ? 0 : surf_action_->get_remains();
  90   else // Actually compute the ratio for sequential tasks
  91     return (surf_action_ == nullptr) ? 0 : surf_action_->get_remains() / surf_action_->get_cost();
  92 }
  93
  94 void simgrid::kernel::activity::ExecImpl::set_bound(double bound)
  95 {
  96   if (surf_action_)
  97     surf_action_->set_bound(bound);
  98 }
  99 void simgrid::kernel::activity::ExecImpl::set_priority(double priority)
 100 {
 101   if (surf_action_)
 102     surf_action_->set_priority(priority);
 103 }
 104
 105 void simgrid::kernel::activity::ExecImpl::set_category(std::string category)
 106 {
 107   if (surf_action_)
 108     surf_action_->set_category(category);
 109 }
 110
 111 void simgrid::kernel::activity::ExecImpl::post()
 112 {
 113   if (host_ && host_->is_off()) { /* FIXME: handle resource failure for parallel tasks too */
 114     /* If the host running the synchro failed, notice it. This way, the asking
 115      * process can be killed if it runs on that host itself */
 116     state_ = SIMIX_FAILED;
 117   } else if (surf_action_ && surf_action_->get_state() == simgrid::kernel::resource::Action::State::FAILED) {
 118     /* If the host running the synchro didn't fail, then the synchro was canceled */
 119     state_ = SIMIX_CANCELED;
 120   } else if (timeout_detector_ &&
 121              timeout_detector_->get_state() == simgrid::kernel::resource::Action::State::FINISHED) {
 122     state_ = SIMIX_TIMEOUT;
 123   } else {
 124     state_ = SIMIX_DONE;
 125   }
 126
 127   on_completion(this);
 128
 129   if (surf_action_) {
 130     surf_action_->unref();
 131     surf_action_ = nullptr;
 132   }
 133   if (timeout_detector_) {
 134     timeout_detector_->unref();
 135     timeout_detector_ = nullptr;
 136   }
 137
 138   /* If there are simcalls associated with the synchro, then answer them */
 139   if (not simcalls_.empty())
 140     SIMIX_execution_finish(this);
 141 }
 142
 143 simgrid::kernel::activity::ActivityImpl*
 144 simgrid::kernel::activity::ExecImpl::migrate(simgrid::s4u::Host* to)
 145 {
 146
 147   if (not MC_is_active() && not MC_record_replay_is_active()) {
 148     simgrid::kernel::resource::Action* old_action = this->surf_action_;
 149     simgrid::kernel::resource::Action* new_action = to->pimpl_cpu->execution_start(old_action->get_cost());
 150     new_action->set_remains(old_action->get_remains());
 151     new_action->set_data(this);
 152     new_action->set_priority(old_action->get_priority());
 153
 154     // FIXME: the user-defined bound seem to not be kept by LMM, that seem to overwrite it for the multi-core modeling.
 155     // I hope that the user did not provide any.
 156
 157     old_action->set_data(nullptr);
 158     old_action->cancel();
 159     old_action->unref();
 160     this->surf_action_ = new_action;
 161   }
 162
 163   on_migration(this, to);
 164   return this;
 165 }
 166
 167 /*************
 168  * Callbacks *
 169  *************/
 170 simgrid::xbt::signal<void(simgrid::kernel::activity::ExecImplPtr)> simgrid::kernel::activity::ExecImpl::on_creation;
 171 simgrid::xbt::signal<void(simgrid::kernel::activity::ExecImplPtr)> simgrid::kernel::activity::ExecImpl::on_completion;
 172 simgrid::xbt::signal<void(simgrid::kernel::activity::ExecImplPtr)> simgrid::kernel::activity::ExecImpl::on_resumed;
 173 simgrid::xbt::signal<void(simgrid::kernel::activity::ExecImplPtr)> simgrid::kernel::activity::ExecImpl::on_suspended;
 174 simgrid::xbt::signal<void(simgrid::kernel::activity::ExecImplPtr, simgrid::s4u::Host*)>
 175     simgrid::kernel::activity::ExecImpl::on_migration;