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 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_))
 117         .set_name(name_)
 118         .set_tracing_category(tracing_category_)
 119         .set_priority(1. / priority_)
 120         .set_bound(bound_)
 121         .set_flops_amount(flops_amount_)
 122         .start();
 123   });
 124   state_ = State::STARTED;
 125   on_start(*Actor::self());
 126   return this;
 127 }
 128
 129 /** @brief Returns whether the state of the exec is finished */
 130 /** @brief Change the host on which this activity takes place.
 131  *
 132  * The activity cannot be terminated already (but it may be started). */
 133 ExecPtr ExecSeq::set_host(Host* host)
 134 {
 135   xbt_assert(state_ == State::INITED || state_ == State::STARTED,
 136              "Cannot change the host of an exec once it's done (state: %d)", (int)state_);
 137   if (state_ == State::STARTED)
 138     boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->migrate(host);
 139   host_ = host;
 140   boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->set_host(host);
 141   return this;
 142 }
 143
 144
 145 /** @brief Retrieve the host on which this activity takes place. */
 146 Host* ExecSeq::get_host()
 147 {
 148   return host_;
 149 }
 150
 151 /** @brief Returns the amount of flops that remain to be done */
 152 double ExecSeq::get_remaining()
 153 {
 154   return simgrid::simix::simcall(
 155       [this]() { return boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->get_remaining(); });
 156 }
 157
 158 /** @brief Returns the ratio of elements that are still to do
 159  *
 160  * The returned value is between 0 (completely done) and 1 (nothing done yet).
 161  */
 162 double ExecSeq::get_remaining_ratio()
 163 {
 164   return simgrid::simix::simcall([this]() {
 165     return boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->get_seq_remaining_ratio();
 166   });
 167 }
 168
 169 ///////////// PARALLEL EXECUTIONS ////////
 170 ExecPar::ExecPar(const std::vector<s4u::Host*>& hosts, const std::vector<double>& flops_amounts,
 171                  const std::vector<double>& bytes_amounts)
 172     : Exec(), hosts_(hosts), flops_amounts_(flops_amounts), bytes_amounts_(bytes_amounts)
 173 {
 174 }
 175
 176 Exec* ExecPar::start()
 177 {
 178   simix::simcall([this] {
 179     (*boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_))
 180         .set_hosts(hosts_)
 181         .set_timeout(timeout_)
 182         .set_flops_amounts(flops_amounts_)
 183         .set_bytes_amounts(bytes_amounts_)
 184         .start();
 185   });
 186   state_ = State::STARTED;
 187   on_start(*Actor::self());
 188   return this;
 189 }
 190
 191 double ExecPar::get_remaining_ratio()
 192 {
 193   return simix::simcall(
 194       [this]() { return boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->get_par_remaining_ratio(); });
 195 }
 196
 197 double ExecPar::get_remaining()
 198 {
 199   XBT_WARN("Calling get_remaining() on a parallel execution is not allowed. Call get_remaining_ratio() instead.");
 200   return get_remaining_ratio();
 201 }
 202 } // namespace s4u
 203 } // namespace simgrid