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merge ExecSeq and ExecPar into Exec (simdag-style)
[simgrid.git] / src / s4u / s4u_Exec.cpp
1 /* Copyright (c) 2006-2020. 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 const&)> Exec::on_start;
16 xbt::signal<void(Actor const&, Exec const&)> Exec::on_completion;
17
18 Exec::Exec()
19 {
20   pimpl_ = kernel::activity::ExecImplPtr(new kernel::activity::ExecImpl());
21 }
22
23 Exec* Exec::wait()
24 {
25   return this->wait_for(-1);
26 }
27
28 Exec* Exec::wait_for(double timeout)
29 {
30   if (state_ == State::INITED)
31     vetoable_start();
32
33   kernel::actor::ActorImpl* issuer = Actor::self()->get_impl();
34   kernel::actor::simcall_blocking<void>([this, issuer, timeout] { this->get_impl()->wait_for(issuer, timeout); });
35   state_ = State::FINISHED;
36   on_completion(*Actor::self(), *this);
37   this->release_dependencies();
38   return this;
39 }
40
41 int Exec::wait_any_for(std::vector<ExecPtr>* execs, double timeout)
42 {
43   std::unique_ptr<kernel::activity::ExecImpl* []> rexecs(new kernel::activity::ExecImpl*[execs->size()]);
44   std::transform(begin(*execs), end(*execs), rexecs.get(),
45                  [](const ExecPtr& exec) { return static_cast<kernel::activity::ExecImpl*>(exec->pimpl_.get()); });
46
47   int changed_pos = simcall_execution_waitany_for(rexecs.get(), execs->size(), timeout);
48   if (changed_pos != -1)
49     execs->at(changed_pos)->release_dependencies();
50   return changed_pos;
51 }
52
53 Exec* Exec::cancel()
54 {
55   kernel::actor::simcall([this] { boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->cancel(); });
56   state_ = State::CANCELED;
57   return this;
58 }
59
60 /** @brief change the execution bound
61  * This means changing the maximal amount of flops per second that it may consume, regardless of what the host may
62  * deliver. Currently, this cannot be changed once the exec started.
63  */
64 ExecPtr Exec::set_bound(double bound)
65 {
66   xbt_assert(state_ == State::INITED, "Cannot change the bound of an exec after its start");
67   bound_ = bound;
68   return this;
69 }
70 ExecPtr Exec::set_timeout(double timeout) // XBT_ATTRIB_DEPRECATED_v329
71 {
72   xbt_assert(state_ == State::INITED, "Cannot change the bound of an exec after its start");
73   timeout_ = timeout;
74   return this;
75 }
76
77 ExecPtr Exec::set_flops_amount(double flops_amount)
78 {
79   xbt_assert(state_ == State::INITED, "Cannot change the flop_amount of an exec after its start");
80   flops_amounts_.assign(1, flops_amount);
81   Activity::set_remaining(flops_amounts_.front());
82   return this;
83 }
84
85 ExecPtr Exec::set_flops_amounts(const std::vector<double>& flops_amounts)
86 {
87   xbt_assert(state_ == State::INITED, "Cannot change the flops_amounts of an exec after its start");
88   flops_amounts_ = flops_amounts;
89   parallel_      = true;
90   return this;
91 }
92
93 ExecPtr Exec::set_bytes_amounts(const std::vector<double>& bytes_amounts)
94 {
95   xbt_assert(state_ == State::INITED, "Cannot change the bytes_amounts of an exec after its start");
96   bytes_amounts_ = bytes_amounts;
97   parallel_      = true;
98   return this;
99 }
100
101 /** @brief Retrieve the host on which this activity takes place.
102  *  If it runs on more than one host, only the first host is returned.
103  */
104 Host* Exec::get_host() const
105 {
106   return static_cast<kernel::activity::ExecImpl*>(pimpl_.get())->get_host();
107 }
108 unsigned int Exec::get_host_number() const
109 {
110   return static_cast<kernel::activity::ExecImpl*>(pimpl_.get())->get_host_number();
111 }
112 double Exec::get_start_time() const
113 {
114   return (pimpl_->surf_action_ == nullptr) ? -1 : pimpl_->surf_action_->get_start_time();
115 }
116 double Exec::get_finish_time() const
117 {
118   return (pimpl_->surf_action_ == nullptr) ? -1 : pimpl_->surf_action_->get_finish_time();
119 }
120 double Exec::get_cost() const
121 {
122   return (pimpl_->surf_action_ == nullptr) ? -1 : pimpl_->surf_action_->get_cost();
123 }
124
125 /** @brief  Change the execution priority, don't you think?
126  *
127  * An execution with twice the priority will get twice the amount of flops when the resource is shared.
128  * The default priority is 1.
129  *
130  * Currently, this cannot be changed once the exec started. */
131 ExecPtr Exec::set_priority(double priority)
132 {
133   xbt_assert(state_ == State::INITED, "Cannot change the priority of an exec after its start");
134   priority_ = priority;
135   return this;
136 }
137
138 /** @brief Change the host on which this activity takes place.
139  *
140  * The activity cannot be terminated already (but it may be started). */
141 ExecPtr Exec::set_host(Host* host)
142 {
143   xbt_assert(state_ == State::INITED || state_ == State::STARTED,
144              "Cannot change the host of an exec once it's done (state: %d)", (int)state_);
145   if (state_ == State::STARTED)
146     boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->migrate(host);
147   boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->set_host(host);
148   return this;
149 }
150
151 ExecPtr Exec::set_hosts(const std::vector<Host*>& hosts)
152 {
153   xbt_assert(state_ == State::INITED, "Cannot change the hosts of an exec once it's done (state: %d)", (int)state_);
154   hosts_    = hosts;
155   parallel_ = true;
156   return this;
157 }
158
159 ///////////// SEQUENTIAL EXECUTIONS ////////
160 Exec* Exec::start()
161 {
162   if (is_parallel())
163     kernel::actor::simcall([this] {
164       (*boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_))
165           .set_hosts(hosts_)
166           .set_timeout(timeout_)
167           .set_flops_amounts(flops_amounts_)
168           .set_bytes_amounts(bytes_amounts_)
169           .start();
170     });
171   else
172     kernel::actor::simcall([this] {
173       (*boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_))
174           .set_name(get_name())
175           .set_tracing_category(get_tracing_category())
176           .set_sharing_penalty(1. / priority_)
177           .set_bound(bound_)
178           .set_flops_amount(flops_amounts_.front())
179           .start();
180     });
181   state_ = State::STARTED;
182   on_start(*Actor::self(), *this);
183   return this;
184 }
185
186 double Exec::get_remaining() const
187 {
188   if (is_parallel()) {
189     XBT_WARN("Calling get_remaining() on a parallel execution is not allowed. Call get_remaining_ratio() instead.");
190     return get_remaining_ratio();
191   } else
192     return kernel::actor::simcall(
193         [this]() { return boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->get_remaining(); });
194 }
195
196 /** @brief Returns the ratio of elements that are still to do
197  *
198  * The returned value is between 0 (completely done) and 1 (nothing done yet).
199  */
200 double Exec::get_remaining_ratio() const
201 {
202   if (is_parallel())
203     return kernel::actor::simcall(
204         [this]() { return boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->get_par_remaining_ratio(); });
205   else
206     return kernel::actor::simcall(
207         [this]() { return boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->get_seq_remaining_ratio(); });
208 }
209
210 } // namespace s4u
211 } // namespace simgrid