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(Actor const&)> Exec::on_start;
  16 xbt::signal<void(Actor const&)> Exec::on_completion;
  17
  18 Exec::Exec()
  19 {
  20   pimpl_ = kernel::activity::ExecImplPtr(new kernel::activity::ExecImpl());
  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 int Exec::wait_any_for(std::vector<ExecPtr>* execs, double timeout)
  57 {
  58   std::unique_ptr<kernel::activity::ExecImpl* []> rexecs(new kernel::activity::ExecImpl*[execs->size()]);
  59   std::transform(begin(*execs), end(*execs), rexecs.get(),
  60                  [](const ExecPtr& exec) { return static_cast<kernel::activity::ExecImpl*>(exec->pimpl_.get()); });
  61   return simcall_execution_waitany_for(rexecs.get(), execs->size(), timeout);
  62 }
  63
  64 Exec* Exec::cancel()
  65 {
  66   simix::simcall([this] { boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->cancel(); });
  67   state_ = State::CANCELED;
  68   return this;
  69 }
  70
  71 void intrusive_ptr_release(simgrid::s4u::Exec* e)
  72 {
  73   if (e->refcount_.fetch_sub(1, std::memory_order_release) == 1) {
  74     std::atomic_thread_fence(std::memory_order_acquire);
  75     delete e;
  76   }
  77 }
  78
  79 void intrusive_ptr_add_ref(simgrid::s4u::Exec* e)
  80 {
  81   e->refcount_.fetch_add(1, std::memory_order_relaxed);
  82 }
  83
  84 /** @brief change the execution bound
  85  * This means changing the maximal amount of flops per second that it may consume, regardless of what the host may
  86  * deliver. Currently, this cannot be changed once the exec started.
  87  */
  88 ExecPtr Exec::set_bound(double bound)
  89 {
  90   xbt_assert(state_ == State::INITED, "Cannot change the bound of an exec after its start");
  91   bound_ = bound;
  92   return this;
  93 }
  94 ExecPtr Exec::set_timeout(double timeout)
  95 {
  96   xbt_assert(state_ == State::INITED, "Cannot change the bound of an exec after its start");
  97   timeout_ = timeout;
  98   return this;
  99 }
 100
 101 ExecPtr Exec::set_name(const std::string& name)
 102 {
 103   xbt_assert(state_ == State::INITED, "Cannot change the name of an exec after its start");
 104   name_ = name;
 105   return this;
 106 }
 107
 108 /** @brief  Change the execution priority, don't you think?
 109  *
 110  * An execution with twice the priority will get twice the amount of flops when the resource is shared.
 111  * The default priority is 1.
 112  *
 113  * Currently, this cannot be changed once the exec started. */
 114 ExecPtr Exec::set_priority(double priority)
 115 {
 116   xbt_assert(state_ == State::INITED, "Cannot change the priority of an exec after its start");
 117   priority_ = priority;
 118   return this;
 119 }
 120
 121 ExecPtr Exec::set_tracing_category(const std::string& category)
 122 {
 123   xbt_assert(state_ == State::INITED, "Cannot change the tracing category of an exec after its start");
 124   tracing_category_ = category;
 125   return this;
 126 }
 127
 128 ///////////// SEQUENTIAL EXECUTIONS ////////
 129 ExecSeq::ExecSeq(sg_host_t host, double flops_amount) : Exec(), flops_amount_(flops_amount)
 130 {
 131   Activity::set_remaining(flops_amount_);
 132   boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->set_host(host);
 133 }
 134
 135 Exec* ExecSeq::start()
 136 {
 137   simix::simcall([this] {
 138     (*boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_))
 139         .set_name(name_)
 140         .set_tracing_category(tracing_category_)
 141         .set_sharing_penalty(1. / priority_)
 142         .set_bound(bound_)
 143         .set_flops_amount(flops_amount_)
 144         .start();
 145   });
 146   state_ = State::STARTED;
 147   on_start(*Actor::self());
 148   return this;
 149 }
 150
 151 /** @brief Returns whether the state of the exec is finished */
 152 /** @brief Change the host on which this activity takes place.
 153  *
 154  * The activity cannot be terminated already (but it may be started). */
 155 ExecPtr ExecSeq::set_host(Host* host)
 156 {
 157   xbt_assert(state_ == State::INITED || state_ == State::STARTED,
 158              "Cannot change the host of an exec once it's done (state: %d)", (int)state_);
 159   if (state_ == State::STARTED)
 160     boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->migrate(host);
 161   host_ = host;
 162   boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->set_host(host);
 163   return this;
 164 }
 165
 166
 167 /** @brief Retrieve the host on which this activity takes place. */
 168 Host* ExecSeq::get_host()
 169 {
 170   return host_;
 171 }
 172
 173 /** @brief Returns the amount of flops that remain to be done */
 174 double ExecSeq::get_remaining()
 175 {
 176   return simgrid::simix::simcall(
 177       [this]() { return boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->get_remaining(); });
 178 }
 179
 180 /** @brief Returns the ratio of elements that are still to do
 181  *
 182  * The returned value is between 0 (completely done) and 1 (nothing done yet).
 183  */
 184 double ExecSeq::get_remaining_ratio()
 185 {
 186   return simgrid::simix::simcall([this]() {
 187     return boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->get_seq_remaining_ratio();
 188   });
 189 }
 190
 191 ///////////// PARALLEL EXECUTIONS ////////
 192 ExecPar::ExecPar(const std::vector<s4u::Host*>& hosts, const std::vector<double>& flops_amounts,
 193                  const std::vector<double>& bytes_amounts)
 194     : Exec(), hosts_(hosts), flops_amounts_(flops_amounts), bytes_amounts_(bytes_amounts)
 195 {
 196 }
 197
 198 Exec* ExecPar::start()
 199 {
 200   simix::simcall([this] {
 201     (*boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_))
 202         .set_hosts(hosts_)
 203         .set_timeout(timeout_)
 204         .set_flops_amounts(flops_amounts_)
 205         .set_bytes_amounts(bytes_amounts_)
 206         .start();
 207   });
 208   state_ = State::STARTED;
 209   on_start(*Actor::self());
 210   return this;
 211 }
 212
 213 double ExecPar::get_remaining_ratio()
 214 {
 215   return simix::simcall(
 216       [this]() { return boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->get_par_remaining_ratio(); });
 217 }
 218
 219 double ExecPar::get_remaining()
 220 {
 221   XBT_WARN("Calling get_remaining() on a parallel execution is not allowed. Call get_remaining_ratio() instead.");
 222   return get_remaining_ratio();
 223 }
 224 } // namespace s4u
 225 } // namespace simgrid