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_ ==
  77       nullptr) // parallel task: their remain is already between 0 and 1 (see comment in ExecImpl::get_remaining())
  78     return surf_action_->get_remains();
  79   else // Actually compute the ratio for sequential tasks
  80     return surf_action_->get_remains() / surf_action_->get_cost();
  81 }
  82
  83 void simgrid::kernel::activity::ExecImpl::set_bound(double bound)
  84 {
  85   if (surf_action_)
  86     surf_action_->set_bound(bound);
  87 }
  88 void simgrid::kernel::activity::ExecImpl::set_priority(double priority)
  89 {
  90   if (surf_action_)
  91     surf_action_->set_priority(priority);
  92 }
  93
  94 void simgrid::kernel::activity::ExecImpl::post()
  95 {
  96   if (host_ && host_->isOff()) { /* FIXME: handle resource failure for parallel tasks too */
  97                                  /* If the host running the synchro failed, notice it. This way, the asking
  98                                   * process can be killed if it runs on that host itself */
  99                                  state_ = SIMIX_FAILED;
 100   } else if (surf_action_ && surf_action_->get_state() == simgrid::kernel::resource::Action::State::FAILED) {
 101     /* If the host running the synchro didn't fail, then the synchro was canceled */
 102     state_ = SIMIX_CANCELED;
 103   } else if (timeout_detector_ &&
 104              timeout_detector_->get_state() == simgrid::kernel::resource::Action::State::FINISHED) {
 105     state_ = SIMIX_TIMEOUT;
 106   } else {
 107     state_ = SIMIX_DONE;
 108   }
 109
 110   if (surf_action_) {
 111     surf_action_->unref();
 112     surf_action_ = nullptr;
 113   }
 114   if (timeout_detector_) {
 115     timeout_detector_->unref();
 116     timeout_detector_ = nullptr;
 117   }
 118
 119   onCompletion(this);
 120   /* If there are simcalls associated with the synchro, then answer them */
 121   if (not simcalls_.empty())
 122     SIMIX_execution_finish(this);
 123 }
 124
 125 simgrid::kernel::activity::ActivityImpl*
 126 simgrid::kernel::activity::ExecImpl::migrate(simgrid::s4u::Host* to)
 127 {
 128
 129   if (not MC_is_active() && not MC_record_replay_is_active()) {
 130     simgrid::kernel::resource::Action* old_action = this->surf_action_;
 131     simgrid::kernel::resource::Action* new_action = to->pimpl_cpu->execution_start(old_action->get_cost());
 132     new_action->set_remains(old_action->get_remains());
 133     new_action->set_data(this);
 134     new_action->set_priority(old_action->get_priority());
 135
 136     // FIXME: the user-defined bound seem to not be kept by LMM, that seem to overwrite it for the multi-core modeling.
 137     // I hope that the user did not provide any.
 138
 139     old_action->set_data(nullptr);
 140     old_action->cancel();
 141     old_action->unref();
 142     this->surf_action_ = new_action;
 143   }
 144
 145   onMigration(this, to);
 146   return this;
 147 }
 148
 149 /*************
 150  * Callbacks *
 151  *************/
 152 simgrid::xbt::signal<void(simgrid::kernel::activity::ExecImplPtr)> simgrid::kernel::activity::ExecImpl::onCreation;
 153 simgrid::xbt::signal<void(simgrid::kernel::activity::ExecImplPtr)> simgrid::kernel::activity::ExecImpl::onCompletion;
 154 simgrid::xbt::signal<void(simgrid::kernel::activity::ExecImplPtr, simgrid::s4u::Host*)> simgrid::kernel::activity::ExecImpl::onMigration;