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[simgrid.git] / src / s4u / s4u_Exec.cpp
1 /* Copyright (c) 2006-2022. 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/Exception.hpp>
7 #include <simgrid/exec.h>
8 #include <simgrid/s4u/Exec.hpp>
9 #include <simgrid/s4u/Host.hpp>
10
11 #include "src/kernel/activity/ExecImpl.hpp"
12 #include "src/kernel/actor/ActorImpl.hpp"
13 #include "src/kernel/actor/SimcallObserver.hpp"
14
15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_exec, s4u_activity, "S4U asynchronous executions");
16
17 namespace simgrid::s4u {
18 xbt::signal<void(Exec const&)> Exec::on_start;
19
20 Exec::Exec(kernel::activity::ExecImplPtr pimpl)
21 {
22   pimpl_ = pimpl;
23 }
24
25 void Exec::reset() const
26 {
27   boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->reset();
28 }
29
30 ExecPtr Exec::init()
31 {
32   auto pimpl = kernel::activity::ExecImplPtr(new kernel::activity::ExecImpl());
33   unsigned int cb_id = Host::on_state_change.connect([pimpl](s4u::Host const& h) {
34     if (not h.is_on() && pimpl->get_state() == kernel::activity::State::RUNNING &&
35         std::find(pimpl->get_hosts().begin(), pimpl->get_hosts().end(), &h) != pimpl->get_hosts().end()) {
36       pimpl->set_state(kernel::activity::State::FAILED);
37       pimpl->post();
38     }
39   });
40   pimpl->set_cb_id(cb_id);
41   return ExecPtr(static_cast<Exec*>(pimpl->get_iface()));
42 }
43
44 Exec* Exec::start()
45 {
46   kernel::actor::simcall_answered([this] {
47     (*boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_))
48         .set_name(get_name())
49         .set_tracing_category(get_tracing_category())
50         .start();
51   });
52
53   if (suspended_)
54     pimpl_->suspend();
55
56   state_      = State::STARTED;
57   on_start(*this);
58   return this;
59 }
60
61 ssize_t Exec::wait_any_for(const std::vector<ExecPtr>& execs, double timeout)
62 {
63   std::vector<ActivityPtr> activities;
64   for (const auto& exec : execs)
65     activities.push_back(boost::dynamic_pointer_cast<Activity>(exec));
66   return Activity::wait_any_for(activities, timeout);
67 }
68
69 /** @brief change the execution bound
70  * This means changing the maximal amount of flops per second that it may consume, regardless of what the host may
71  * deliver. Currently, this cannot be changed once the exec started.
72  */
73 ExecPtr Exec::set_bound(double bound)
74 {
75   xbt_assert(state_ == State::INITED || state_ == State::STARTING,
76              "Cannot change the bound of an exec after its start");
77   kernel::actor::simcall_answered(
78       [this, bound] { boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->set_bound(bound); });
79   return this;
80 }
81
82 /** @brief  Change the execution priority, don't you think?
83  *
84  * An execution with twice the priority will get twice the amount of flops when the resource is shared.
85  * The default priority is 1.
86  *
87  * Currently, this cannot be changed once the exec started. */
88 ExecPtr Exec::set_priority(double priority)
89 {
90   xbt_assert(state_ == State::INITED || state_ == State::STARTING,
91              "Cannot change the priority of an exec after its start");
92   kernel::actor::simcall_answered([this, priority] {
93     boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->set_sharing_penalty(1. / priority);
94   });
95   return this;
96 }
97
98 ExecPtr Exec::update_priority(double priority)
99 {
100   kernel::actor::simcall_answered([this, priority] {
101     boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->update_sharing_penalty(1. / priority);
102   });
103   return this;
104 }
105
106 ExecPtr Exec::set_flops_amount(double flops_amount)
107 {
108   xbt_assert(state_ == State::INITED || state_ == State::STARTING,
109       "Cannot change the flop_amount of an exec after its start");
110   kernel::actor::simcall_answered([this, flops_amount] {
111     boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->set_flops_amount(flops_amount);
112   });
113   set_remaining(flops_amount);
114   return this;
115 }
116
117 ExecPtr Exec::set_flops_amounts(const std::vector<double>& flops_amounts)
118 {
119   xbt_assert(state_ == State::INITED || state_ == State::STARTING,
120       "Cannot change the flops_amounts of an exec after its start");
121   kernel::actor::simcall_answered([this, flops_amounts] {
122     boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->set_flops_amounts(flops_amounts);
123   });
124   parallel_      = true;
125   return this;
126 }
127
128 ExecPtr Exec::set_bytes_amounts(const std::vector<double>& bytes_amounts)
129 {
130   xbt_assert(state_ == State::INITED || state_ == State::STARTING,
131       "Cannot change the bytes_amounts of an exec after its start");
132   kernel::actor::simcall_answered([this, bytes_amounts] {
133     boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->set_bytes_amounts(bytes_amounts);
134   });
135   parallel_      = true;
136   return this;
137 }
138
139 ExecPtr Exec::set_thread_count(int thread_count)
140 {
141   xbt_assert(state_ == State::INITED || state_ == State::STARTING,
142              "Cannot change the bytes_amounts of an exec after its start");
143   kernel::actor::simcall_answered([this, thread_count] {
144     boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->set_thread_count(thread_count);
145   });
146   return this;
147 }
148
149 /** @brief Retrieve the host on which this activity takes place.
150  *  If it runs on more than one host, only the first host is returned.
151  */
152 Host* Exec::get_host() const
153 {
154   return static_cast<kernel::activity::ExecImpl*>(pimpl_.get())->get_host();
155 }
156 unsigned int Exec::get_host_number() const
157 {
158   return static_cast<kernel::activity::ExecImpl*>(pimpl_.get())->get_host_number();
159 }
160
161 int Exec::get_thread_count() const
162 {
163   return static_cast<kernel::activity::ExecImpl*>(pimpl_.get())->get_thread_count();
164 }
165
166 /** @brief Change the host on which this activity takes place.
167  *
168  * The activity cannot be terminated already (but it may be started). */
169 ExecPtr Exec::set_host(Host* host)
170 {
171   xbt_assert(state_ == State::INITED || state_ == State::STARTING || state_ == State::STARTED,
172              "Cannot change the host of an exec once it's done (state: %s)", to_c_str(state_));
173
174   if (state_ == State::STARTED)
175     boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->migrate(host);
176
177   kernel::actor::simcall_answered(
178       [this, host] { boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->set_host(host); });
179
180   if (state_ == State::STARTING)
181   // Setting the host may allow to start the activity, let's try
182     vetoable_start();
183
184   return this;
185 }
186
187 ExecPtr Exec::set_hosts(const std::vector<Host*>& hosts)
188 {
189   xbt_assert(state_ == State::INITED || state_ == State::STARTING,
190              "Cannot change the hosts of an exec once it's done (state: %s)", to_c_str(state_));
191
192   kernel::actor::simcall_answered(
193       [this, hosts] { boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->set_hosts(hosts); });
194   parallel_ = true;
195
196   // Setting the host may allow to start the activity, let's try
197   if (state_ == State::STARTING)
198      vetoable_start();
199
200   return this;
201 }
202
203 ExecPtr Exec::unset_host()
204 {
205   if (not is_assigned())
206     throw std::invalid_argument(
207         xbt::string_printf("Exec %s: the activity is not assigned to any host(s)", get_cname()));
208   else {
209     reset();
210
211     if (state_ == State::STARTED)
212       cancel();
213     vetoable_start();
214
215     return this;
216   }
217 }
218
219 double Exec::get_cost() const
220 {
221   return (pimpl_->surf_action_ == nullptr) ? -1 : pimpl_->surf_action_->get_cost();
222 }
223
224 double Exec::get_remaining() const
225 {
226   if (is_parallel()) {
227     XBT_WARN("Calling get_remaining() on a parallel execution is not allowed. Call get_remaining_ratio() instead.");
228     return get_remaining_ratio();
229   } else
230     return kernel::actor::simcall_answered(
231         [this]() { return boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->get_remaining(); });
232 }
233
234 /** @brief Returns the ratio of elements that are still to do
235  *
236  * The returned value is between 0 (completely done) and 1 (nothing done yet).
237  */
238 double Exec::get_remaining_ratio() const
239 {
240   if (is_parallel())
241     return kernel::actor::simcall_answered(
242         [this]() { return boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->get_par_remaining_ratio(); });
243   else
244     return kernel::actor::simcall_answered(
245         [this]() { return boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->get_seq_remaining_ratio(); });
246 }
247
248 bool Exec::is_assigned() const
249 {
250   return not boost::static_pointer_cast<kernel::activity::ExecImpl>(pimpl_)->get_hosts().empty();
251 }
252 } // namespace simgrid::s4u
253
254 /* **************************** Public C interface *************************** */
255 void sg_exec_set_bound(sg_exec_t exec, double bound)
256 {
257   exec->set_bound(bound);
258 }
259
260 const char* sg_exec_get_name(const_sg_exec_t exec)
261 {
262   return exec->get_cname();
263 }
264
265 void sg_exec_set_name(sg_exec_t exec, const char* name)
266 {
267   exec->set_name(name);
268 }
269
270 void sg_exec_set_host(sg_exec_t exec, sg_host_t new_host)
271 {
272   exec->set_host(new_host);
273 }
274
275 double sg_exec_get_remaining(const_sg_exec_t exec)
276 {
277   return exec->get_remaining();
278 }
279
280 double sg_exec_get_remaining_ratio(const_sg_exec_t exec)
281 {
282   return exec->get_remaining_ratio();
283 }
284
285 void sg_exec_start(sg_exec_t exec)
286 {
287   exec->vetoable_start();
288 }
289
290 void sg_exec_cancel(sg_exec_t exec)
291 {
292   exec->cancel();
293   exec->unref();
294 }
295
296 int sg_exec_test(sg_exec_t exec)
297 {
298   bool finished = exec->test();
299   if (finished)
300     exec->unref();
301   return finished;
302 }
303
304 sg_error_t sg_exec_wait(sg_exec_t exec)
305 {
306   return sg_exec_wait_for(exec, -1.0);
307 }
308
309 sg_error_t sg_exec_wait_for(sg_exec_t exec, double timeout)
310 {
311   sg_error_t status = SG_OK;
312
313   simgrid::s4u::ExecPtr s4u_exec(exec, false);
314   try {
315     s4u_exec->wait_for(timeout);
316   } catch (const simgrid::TimeoutException&) {
317     s4u_exec->add_ref(); // the wait_for timeouted, keep the exec alive
318     status = SG_ERROR_TIMEOUT;
319   } catch (const simgrid::CancelException&) {
320     status = SG_ERROR_CANCELED;
321   } catch (const simgrid::HostFailureException&) {
322     status = SG_ERROR_HOST;
323   }
324   return status;
325 }
326
327 ssize_t sg_exec_wait_any(sg_exec_t* execs, size_t count)
328 {
329   return sg_exec_wait_any_for(execs, count, -1.0);
330 }
331
332 ssize_t sg_exec_wait_any_for(sg_exec_t* execs, size_t count, double timeout)
333 {
334   std::vector<simgrid::s4u::ExecPtr> s4u_execs;
335   for (size_t i = 0; i < count; i++)
336     s4u_execs.emplace_back(execs[i], false);
337
338   ssize_t pos = simgrid::s4u::Exec::wait_any_for(s4u_execs, timeout);
339   for (size_t i = 0; i < count; i++) {
340     if (pos != -1 && static_cast<size_t>(pos) != i)
341       s4u_execs[i]->add_ref();
342   }
343   return pos;
344 }