src/s4u/s4u_Exec.cpp

   1 /* Copyright (c) 2006-2019. 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/s4u/Actor.hpp"
   7 #include "simgrid/s4u/Exec.hpp"
   8 #include "src/kernel/activity/ExecImpl.hpp"
   9 #include "xbt/log.h"
  10
  11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_exec, s4u_activity, "S4U asynchronous executions");
  12
  13 namespace simgrid {
  14 namespace s4u {
  15 xbt::signal<void(ActorPtr)> Exec::on_start;
  16 xbt::signal<void(ActorPtr)> Exec::on_completion;
  17
  18 Exec::Exec()
  19 {
  20   pimpl_ = kernel::activity::ExecImplPtr(new kernel::activity::ExecImpl(get_name(), get_tracing_category()));
  21 }
  22
  23 bool Exec::test()
  24 {
  25   xbt_assert(state_ == State::INITED || state_ == State::STARTED || state_ == State::FINISHED);
  26
  27   if (state_ == State::FINISHED)
  28     return true;
  29
  30   if (state_ == State::INITED)
  31     this->start();
  32
  33   if (simcall_execution_test(pimpl_)) {
  34     state_ = State::FINISHED;
  35     return true;
  36   }
  37
  38   return false;
  39 }
  40
  41 Exec* Exec::wait()
  42 {
  43   if (state_ == State::INITED)
  44     start();
  45   simcall_execution_wait(pimpl_);
  46   state_ = State::FINISHED;
  47   on_completion(Actor::self());
  48   return this;
  49 }
  50
  51 Exec* Exec::wait_for(double)
  52 {
  53   THROW_UNIMPLEMENTED;
  54 }
  55
  56 Exec* Exec::cancel()
  57 {
  58   simix::simcall([this] { boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->cancel(); });
  59   state_ = State::CANCELED;
  60   return this;
  61 }
  62
  63 void intrusive_ptr_release(simgrid::s4u::Exec* e)
  64 {
  65   if (e->refcount_.fetch_sub(1, std::memory_order_release) == 1) {
  66     std::atomic_thread_fence(std::memory_order_acquire);
  67     delete e;
  68   }
  69 }
  70
  71 void intrusive_ptr_add_ref(simgrid::s4u::Exec* e)
  72 {
  73   e->refcount_.fetch_add(1, std::memory_order_relaxed);
  74 }
  75
  76 /** @brief change the execution bound
  77  * This means changing the maximal amount of flops per second that it may consume, regardless of what the host may
  78  * deliver. Currently, this cannot be changed once the exec started.
  79  */
  80 ExecPtr Exec::set_bound(double bound)
  81 {
  82   xbt_assert(state_ == State::INITED, "Cannot change the bound of an exec after its start");
  83   bound_ = bound;
  84   return this;
  85 }
  86 ExecPtr Exec::set_timeout(double timeout)
  87 {
  88   xbt_assert(state_ == State::INITED, "Cannot change the bound of an exec after its start");
  89   timeout_ = timeout;
  90   return this;
  91 }
  92
  93 /** @brief  Change the execution priority, don't you think?
  94  *
  95  * An execution with twice the priority will get twice the amount of flops when the resource is shared.
  96  * The default priority is 1.
  97  *
  98  * Currently, this cannot be changed once the exec started. */
  99 ExecPtr Exec::set_priority(double priority)
 100 {
 101   xbt_assert(state_ == State::INITED, "Cannot change the priority of an exec after its start");
 102   priority_ = priority;
 103   return this;
 104 }
 105
 106 ///////////// SEQUENTIAL EXECUTIONS ////////
 107 ExecSeq::ExecSeq(sg_host_t host, double flops_amount) : Exec(), flops_amount_(flops_amount)
 108 {
 109   Activity::set_remaining(flops_amount_);
 110   boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->set_host(host);
 111 }
 112
 113 Exec* ExecSeq::start()
 114 {
 115   simix::simcall([this] {
 116     boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->start(flops_amount_, 1. / priority_, bound_);
 117   });
 118   state_ = State::STARTED;
 119   on_start(Actor::self());
 120   return this;
 121 }
 122
 123 /** @brief Returns whether the state of the exec is finished */
 124 /** @brief Change the host on which this activity takes place.
 125  *
 126  * The activity cannot be terminated already (but it may be started). */
 127 ExecPtr ExecSeq::set_host(Host* host)
 128 {
 129   xbt_assert(state_ == State::INITED || state_ == State::STARTED,
 130              "Cannot change the host of an exec once it's done (state: %d)", (int)state_);
 131   if (state_ == State::STARTED)
 132     boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->migrate(host);
 133   host_ = host;
 134   boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->host_ = host;
 135   return this;
 136 }
 137
 138
 139 /** @brief Retrieve the host on which this activity takes place. */
 140 Host* ExecSeq::get_host()
 141 {
 142   return host_;
 143 }
 144
 145 /** @brief Returns the amount of flops that remain to be done */
 146 double ExecSeq::get_remaining()
 147 {
 148   return simgrid::simix::simcall(
 149       [this]() { return boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->get_remaining(); });
 150 }
 151
 152 /** @brief Returns the ratio of elements that are still to do
 153  *
 154  * The returned value is between 0 (completely done) and 1 (nothing done yet).
 155  */
 156 double ExecSeq::get_remaining_ratio()
 157 {
 158   return simgrid::simix::simcall([this]() {
 159     return boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->get_seq_remaining_ratio();
 160   });
 161 }
 162
 163 ///////////// PARALLEL EXECUTIONS ////////
 164 ExecPar::ExecPar(const std::vector<s4u::Host*>& hosts, const std::vector<double>& flops_amounts,
 165                  const std::vector<double>& bytes_amounts)
 166     : Exec(), hosts_(hosts), flops_amounts_(flops_amounts), bytes_amounts_(bytes_amounts)
 167 {
 168   // For parallel executions, we need a special host to run the timeout detector.
 169   host_                                                                          = hosts.front();
 170   boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->host_ = host_;
 171 }
 172
 173 Exec* ExecPar::start()
 174 {
 175   simix::simcall([this] {
 176     boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->set_timeout(timeout_);
 177     boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->start(hosts_, flops_amounts_, bytes_amounts_);
 178   });
 179   state_ = State::STARTED;
 180   on_start(Actor::self());
 181   return this;
 182 }
 183 double ExecPar::get_remaining_ratio()
 184 {
 185   return simix::simcall(
 186       [this]() { return boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->get_par_remaining_ratio(); });
 187 }
 188
 189 double ExecPar::get_remaining()
 190 {
 191   XBT_WARN("Calling get_remaining() on a parallel execution is not allowed. Call get_remaining_ratio() instead.");
 192   return get_remaining_ratio();
 193 }
 194 } // namespace s4u
 195 } // namespace simgrid