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[simgrid.git] / src / kernel / activity / ExecImpl.cpp
1 /* Copyright (c) 2007-2020. 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 "src/kernel/activity/ExecImpl.hpp"
7 #include "simgrid/Exception.hpp"
8 #include "simgrid/modelchecker.h"
9 #include "src/mc/mc_replay.hpp"
10 #include "src/surf/HostImpl.hpp"
11 #include "src/surf/cpu_interface.hpp"
12 #include "src/surf/surf_interface.hpp"
13
14 #include "simgrid/s4u/Host.hpp"
15
16 #include <boost/range/algorithm.hpp>
17
18 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_process);
19
20 void simcall_HANDLER_execution_wait(smx_simcall_t simcall, simgrid::kernel::activity::ExecImpl* synchro, double timeout)
21 {
22   XBT_DEBUG("Wait for execution of synchro %p, state %d", synchro, (int)synchro->state_);
23   xbt_assert(std::isfinite(timeout), "timeout is not finite!");
24
25   /* Associate this simcall to the synchro */
26   synchro->register_simcall(simcall);
27
28   /* set surf's synchro */
29   if (MC_is_active() || MC_record_replay_is_active()) {
30     int idx = SIMCALL_GET_MC_VALUE(*simcall);
31     if (idx == 0) {
32       synchro->state_ = simgrid::kernel::activity::State::DONE;
33     } else {
34       /* If we reached this point, the wait simcall must have a timeout */
35       /* Otherwise it shouldn't be enabled and executed by the MC */
36       if (timeout < 0.0)
37         THROW_IMPOSSIBLE;
38       synchro->state_ = simgrid::kernel::activity::State::TIMEOUT;
39     }
40     synchro->finish();
41     return;
42   }
43
44   /* If the synchro is already finished then perform the error handling */
45   if (synchro->state_ != simgrid::kernel::activity::State::RUNNING) {
46     synchro->finish();
47   } else { /* we need a sleep action (even when there is no timeout) to be notified of host failures */
48     synchro->set_timeout(timeout);
49   }
50 }
51
52 void simcall_HANDLER_execution_test(smx_simcall_t simcall, simgrid::kernel::activity::ExecImpl* synchro)
53 {
54   bool res = (synchro->state_ != simgrid::kernel::activity::State::WAITING &&
55               synchro->state_ != simgrid::kernel::activity::State::RUNNING);
56   if (res) {
57     synchro->simcalls_.push_back(simcall);
58     synchro->finish();
59   } else {
60     simcall->issuer_->simcall_answer();
61   }
62   simcall_execution_test__set__result(simcall, res);
63 }
64
65 void simcall_HANDLER_execution_waitany_for(smx_simcall_t simcall, simgrid::kernel::activity::ExecImpl* execs[],
66                                            size_t count, double timeout)
67 {
68   if (timeout < 0.0) {
69     simcall->timeout_cb_ = nullptr;
70   } else {
71     simcall->timeout_cb_ = simgrid::simix::Timer::set(SIMIX_get_clock() + timeout, [simcall, execs, count]() {
72       for (size_t i = 0; i < count; i++) {
73         // Remove the first occurrence of simcall:
74         auto* exec = execs[i];
75         auto j     = boost::range::find(exec->simcalls_, simcall);
76         if (j != exec->simcalls_.end())
77           exec->simcalls_.erase(j);
78       }
79       simcall_execution_waitany_for__set__result(simcall, -1);
80       simcall->issuer_->simcall_answer();
81     });
82   }
83
84   for (size_t i = 0; i < count; i++) {
85     /* associate this simcall to the the synchro */
86     auto* exec = execs[i];
87     exec->simcalls_.push_back(simcall);
88
89     /* see if the synchro is already finished */
90     if (exec->state_ != simgrid::kernel::activity::State::WAITING &&
91         exec->state_ != simgrid::kernel::activity::State::RUNNING) {
92       exec->finish();
93       break;
94     }
95   }
96 }
97
98 namespace simgrid {
99 namespace kernel {
100 namespace activity {
101
102 ExecImpl& ExecImpl::set_host(s4u::Host* host)
103 {
104   if (not hosts_.empty())
105     hosts_.clear();
106   hosts_.push_back(host);
107   return *this;
108 }
109
110 ExecImpl& ExecImpl::set_hosts(const std::vector<s4u::Host*>& hosts)
111 {
112   hosts_ = hosts;
113   return *this;
114 }
115
116 ExecImpl& ExecImpl::set_timeout(double timeout)
117 {
118   if (timeout > 0 && not MC_is_active() && not MC_record_replay_is_active()) {
119     timeout_detector_.reset(hosts_.front()->pimpl_cpu->sleep(timeout));
120     timeout_detector_->set_activity(this);
121   }
122   return *this;
123 }
124
125 ExecImpl& ExecImpl::set_flops_amount(double flops_amount)
126 {
127   if (not flops_amounts_.empty())
128     flops_amounts_.clear();
129   flops_amounts_.push_back(flops_amount);
130   return *this;
131 }
132
133 ExecImpl& ExecImpl::set_flops_amounts(const std::vector<double>& flops_amounts)
134 {
135   flops_amounts_ = flops_amounts;
136   return *this;
137 }
138
139 ExecImpl& ExecImpl::set_bytes_amounts(const std::vector<double>& bytes_amounts)
140 {
141   bytes_amounts_ = bytes_amounts;
142
143   return *this;
144 }
145
146 ExecImpl* ExecImpl::start()
147 {
148   state_ = State::RUNNING;
149   if (not MC_is_active() && not MC_record_replay_is_active()) {
150     if (hosts_.size() == 1) {
151       surf_action_ = hosts_.front()->pimpl_cpu->execution_start(flops_amounts_.front());
152       surf_action_->set_sharing_penalty(sharing_penalty_);
153       surf_action_->set_category(get_tracing_category());
154
155       if (bound_ > 0)
156         surf_action_->set_bound(bound_);
157     } else {
158       surf_action_ = surf_host_model->execute_parallel(hosts_, flops_amounts_.data(), bytes_amounts_.data(), -1);
159     }
160     surf_action_->set_activity(this);
161   }
162
163   XBT_DEBUG("Create execute synchro %p: %s", this, get_cname());
164   return this;
165 }
166
167 double ExecImpl::get_seq_remaining_ratio()
168 {
169   return (surf_action_ == nullptr) ? 0 : surf_action_->get_remains() / surf_action_->get_cost();
170 }
171
172 double ExecImpl::get_par_remaining_ratio()
173 {
174   // parallel task: their remain is already between 0 and 1
175   return (surf_action_ == nullptr) ? 0 : surf_action_->get_remains();
176 }
177
178 ExecImpl& ExecImpl::set_bound(double bound)
179 {
180   bound_ = bound;
181   return *this;
182 }
183
184 ExecImpl& ExecImpl::set_sharing_penalty(double sharing_penalty)
185 {
186   sharing_penalty_ = sharing_penalty;
187   return *this;
188 }
189
190 void ExecImpl::post()
191 {
192   if (hosts_.size() == 1 && not hosts_.front()->is_on()) { /* FIXME: handle resource failure for parallel tasks too */
193     /* If the host running the synchro failed, notice it. This way, the asking
194      * process can be killed if it runs on that host itself */
195     state_ = State::FAILED;
196   } else if (surf_action_ && surf_action_->get_state() == resource::Action::State::FAILED) {
197     /* If the host running the synchro didn't fail, then the synchro was canceled */
198     state_ = State::CANCELED;
199   } else if (timeout_detector_ && timeout_detector_->get_state() == resource::Action::State::FINISHED) {
200     state_ = State::TIMEOUT;
201   } else {
202     state_ = State::DONE;
203   }
204
205   clean_action();
206   timeout_detector_.reset();
207   /* Answer all simcalls associated with the synchro */
208   finish();
209 }
210
211 void ExecImpl::finish()
212 {
213   while (not simcalls_.empty()) {
214     smx_simcall_t simcall = simcalls_.front();
215     simcalls_.pop_front();
216
217     /* If a waitany simcall is waiting for this synchro to finish, then remove it from the other synchros in the waitany
218      * list. Afterwards, get the position of the actual synchro in the waitany list and return it as the result of the
219      * simcall */
220
221     if (simcall->call_ == SIMCALL_NONE) // FIXME: maybe a better way to handle this case
222       continue;                        // if process handling comm is killed
223     if (simcall->call_ == SIMCALL_EXECUTION_WAITANY_FOR) {
224       simgrid::kernel::activity::ExecImpl** execs = simcall_execution_waitany_for__get__execs(simcall);
225       size_t count                                = simcall_execution_waitany_for__get__count(simcall);
226
227       for (size_t i = 0; i < count; i++) {
228         // Remove the first occurrence of simcall:
229         auto* exec = execs[i];
230         auto j     = boost::range::find(exec->simcalls_, simcall);
231         if (j != exec->simcalls_.end())
232           exec->simcalls_.erase(j);
233
234         if (simcall->timeout_cb_) {
235           simcall->timeout_cb_->remove();
236           simcall->timeout_cb_ = nullptr;
237         }
238       }
239
240       if (not MC_is_active() && not MC_record_replay_is_active()) {
241         ExecImpl** element = std::find(execs, execs + count, this);
242         int rank           = (element != execs + count) ? element - execs : -1;
243         simcall_execution_waitany_for__set__result(simcall, rank);
244       }
245     }
246
247     switch (state_) {
248       case State::DONE:
249         /* do nothing, synchro done */
250         XBT_DEBUG("ExecImpl::finish(): execution successful");
251         break;
252
253       case State::FAILED:
254         XBT_DEBUG("ExecImpl::finish(): host '%s' failed", simcall->issuer_->get_host()->get_cname());
255         simcall->issuer_->context_->set_wannadie();
256         if (simcall->issuer_->get_host()->is_on())
257           simcall->issuer_->exception_ =
258               std::make_exception_ptr(simgrid::HostFailureException(XBT_THROW_POINT, "Host failed"));
259         /* else, the actor will be killed with no possibility to survive */
260         break;
261
262       case State::CANCELED:
263         XBT_DEBUG("ExecImpl::finish(): execution canceled");
264         simcall->issuer_->exception_ =
265             std::make_exception_ptr(simgrid::CancelException(XBT_THROW_POINT, "Execution Canceled"));
266         break;
267
268       case State::TIMEOUT:
269         XBT_DEBUG("ExecImpl::finish(): execution timeouted");
270         simcall->issuer_->exception_ = std::make_exception_ptr(simgrid::TimeoutException(XBT_THROW_POINT, "Timeouted"));
271         break;
272
273       default:
274         xbt_die("Internal error in ExecImpl::finish(): unexpected synchro state %d", static_cast<int>(state_));
275     }
276
277     simcall->issuer_->waiting_synchro = nullptr;
278     /* Fail the process if the host is down */
279     if (simcall->issuer_->get_host()->is_on())
280       simcall->issuer_->simcall_answer();
281     else
282       simcall->issuer_->context_->set_wannadie();
283   }
284 }
285
286 ActivityImpl* ExecImpl::migrate(s4u::Host* to)
287 {
288   if (not MC_is_active() && not MC_record_replay_is_active()) {
289     resource::Action* old_action = this->surf_action_;
290     resource::Action* new_action = to->pimpl_cpu->execution_start(old_action->get_cost());
291     new_action->set_remains(old_action->get_remains());
292     new_action->set_activity(this);
293     new_action->set_sharing_penalty(old_action->get_sharing_penalty());
294
295     // FIXME: the user-defined bound seem to not be kept by LMM, that seem to overwrite it for the multi-core modeling.
296     // I hope that the user did not provide any.
297
298     old_action->set_activity(nullptr);
299     old_action->cancel();
300     old_action->unref();
301     this->surf_action_ = new_action;
302   }
303
304   on_migration(*this, to);
305   return this;
306 }
307
308 /*************
309  * Callbacks *
310  *************/
311 xbt::signal<void(ExecImpl const&, s4u::Host*)> ExecImpl::on_migration;
312
313 } // namespace activity
314 } // namespace kernel
315 } // namespace simgrid