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(const char* name, resource::Action* surf_action,
  19                                               resource::Action* timeout_detector, s4u::Host* host)
  20     : host_(host)
  21 {
  22   if (name)
  23     this->name = name;
  24   this->state  = SIMIX_RUNNING;
  25
  26   surf_action_ = surf_action;
  27   surf_action_->set_data(this);
  28   if (timeout_detector != nullptr) {
  29     timeout_detector->set_data(this);
  30     timeout_detector_ = timeout_detector;
  31   }
  32
  33   XBT_DEBUG("Create exec %p", this);
  34 }
  35
  36 simgrid::kernel::activity::ExecImpl::~ExecImpl()
  37 {
  38   if (surf_action_)
  39     surf_action_->unref();
  40   if (timeout_detector_)
  41     timeout_detector_->unref();
  42   XBT_DEBUG("Destroy exec %p", this);
  43 }
  44
  45 void simgrid::kernel::activity::ExecImpl::suspend()
  46 {
  47   XBT_VERB("This exec is suspended (remain: %f)", surf_action_->get_remains());
  48   if (surf_action_ != nullptr)
  49     surf_action_->suspend();
  50 }
  51
  52 void simgrid::kernel::activity::ExecImpl::resume()
  53 {
  54   XBT_VERB("This exec is resumed (remain: %f)", surf_action_->get_remains());
  55   if (surf_action_ != nullptr)
  56     surf_action_->resume();
  57 }
  58 void simgrid::kernel::activity::ExecImpl::cancel()
  59 {
  60   XBT_VERB("This exec %p is canceled", this);
  61   if (surf_action_ != nullptr)
  62     surf_action_->cancel();
  63 }
  64
  65 double simgrid::kernel::activity::ExecImpl::get_remaining()
  66 {
  67   xbt_assert(host_ != nullptr, "Calling remains() on a parallel execution is not allowed. "
  68                                "We would need to return a vector instead of a scalar. "
  69                                "Did you mean remainingRatio() instead?");
  70
  71   return surf_action_ ? surf_action_->get_remains() : 0;
  72 }
  73
  74 double simgrid::kernel::activity::ExecImpl::get_remaining_ratio()
  75 {
  76   if (host_ == nullptr) // parallel task: their remain is already between 0 and 1 (see comment in ExecImpl::remains())
  77     return surf_action_->get_remains();
  78   else // Actually compute the ratio for sequential tasks
  79     return surf_action_->get_remains() / surf_action_->get_cost();
  80 }
  81
  82 void simgrid::kernel::activity::ExecImpl::set_bound(double bound)
  83 {
  84   if (surf_action_)
  85     surf_action_->set_bound(bound);
  86 }
  87 void simgrid::kernel::activity::ExecImpl::set_priority(double priority)
  88 {
  89   if (surf_action_)
  90     surf_action_->set_priority(priority);
  91 }
  92
  93 void simgrid::kernel::activity::ExecImpl::post()
  94 {
  95   if (host_ && host_->isOff()) { /* FIXME: handle resource failure for parallel tasks too */
  96                                  /* If the host running the synchro failed, notice it. This way, the asking
  97                                   * process can be killed if it runs on that host itself */
  98     state = SIMIX_FAILED;
  99   } else if (surf_action_ && surf_action_->get_state() == simgrid::kernel::resource::Action::State::failed) {
 100     /* If the host running the synchro didn't fail, then the synchro was canceled */
 101     state = SIMIX_CANCELED;
 102   } else if (timeout_detector_ && timeout_detector_->get_state() == simgrid::kernel::resource::Action::State::done) {
 103     state = SIMIX_TIMEOUT;
 104   } else {
 105     state = SIMIX_DONE;
 106   }
 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   onCompletion(this);
 118   /* If there are simcalls associated with the synchro, then answer them */
 119   if (not simcalls.empty())
 120     SIMIX_execution_finish(this);
 121 }
 122
 123 simgrid::kernel::activity::ActivityImpl*
 124 simgrid::kernel::activity::ExecImpl::migrate(simgrid::s4u::Host* to)
 125 {
 126
 127   if (not MC_is_active() && not MC_record_replay_is_active()) {
 128     simgrid::kernel::resource::Action* oldAction = this->surf_action_;
 129     simgrid::kernel::resource::Action* newAction = to->pimpl_cpu->execution_start(oldAction->get_cost());
 130     newAction->set_remains(oldAction->get_remains());
 131     newAction->set_data(this);
 132     newAction->set_priority(oldAction->get_priority());
 133
 134     // FIXME: the user-defined bound seem to not be kept by LMM, that seem to overwrite it for the multi-core modeling.
 135     // I hope that the user did not provide any.
 136
 137     oldAction->set_data(nullptr);
 138     oldAction->cancel();
 139     oldAction->unref();
 140     this->surf_action_ = newAction;
 141   }
 142
 143   onMigration(this, to);
 144   return this;
 145 }
 146
 147 /*************
 148  * Callbacks *
 149  *************/
 150 simgrid::xbt::signal<void(simgrid::kernel::activity::ExecImplPtr)> simgrid::kernel::activity::ExecImpl::onCreation;
 151 simgrid::xbt::signal<void(simgrid::kernel::activity::ExecImplPtr)> simgrid::kernel::activity::ExecImpl::onCompletion;
 152 simgrid::xbt::signal<void(simgrid::kernel::activity::ExecImplPtr, simgrid::s4u::Host*)> simgrid::kernel::activity::ExecImpl::onMigration;