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add the Storage::read_async and Storage::write_async methods
[simgrid.git] / src / simix / smx_host.cpp
1 /* Copyright (c) 2007-2018. 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 "mc/mc.h"
7 #include "smx_private.hpp"
8 #include "src/kernel/activity/CommImpl.hpp"
9 #include "src/kernel/activity/ExecImpl.hpp"
10 #include "src/mc/mc_replay.hpp"
11 #include "src/plugins/vm/VirtualMachineImpl.hpp"
12 #include "src/simix/smx_host_private.hpp"
13 #include "xbt/ex.hpp"
14
15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_host, simix, "SIMIX hosts");
16
17 /* needs to be public and without simcall for exceptions and logging events */
18 const char* sg_host_self_get_name()
19 {
20   sg_host_t host = sg_host_self();
21   if (host == nullptr || SIMIX_process_self() == simix_global->maestro_process)
22     return "";
23
24   return host->get_cname();
25 }
26
27 /**
28  * @brief Add a process to the list of the processes that the host will restart when it comes back
29  * This function add a process to the list of the processes that will be restarted when the host comes
30  * back. It is expected that this function is called when the host is down.
31  * The processes will only be restarted once, meaning that you will have to register the process
32  * again to restart the process again.
33  */
34 void SIMIX_host_add_auto_restart_process(sg_host_t host, simgrid::kernel::actor::ActorImpl* actor)
35 {
36   simgrid::kernel::actor::ProcessArg* arg = new simgrid::kernel::actor::ProcessArg(host, actor);
37
38   if (host->is_off() && watched_hosts.find(host->get_cname()) == watched_hosts.end()) {
39     watched_hosts.insert(host->get_cname());
40     XBT_DEBUG("Push host %s to watched_hosts because state == SURF_RESOURCE_OFF", host->get_cname());
41   }
42   XBT_DEBUG("Adding Process %s to the auto-restart list of Host %s", arg->name.c_str(), arg->host->get_cname());
43   host->pimpl_->auto_restart_processes_.push_back(arg);
44 }
45
46 /** @brief Restart the list of processes that have been registered to the host */
47 void SIMIX_host_autorestart(sg_host_t host)
48 {
49   std::vector<simgrid::kernel::actor::ProcessArg*> process_list = host->pimpl_->auto_restart_processes_;
50
51   for (auto const& arg : process_list) {
52     XBT_DEBUG("Restarting Process %s@%s right now", arg->name.c_str(), arg->host->get_cname());
53     smx_actor_t actor = simix_global->create_process_function(arg->name.c_str(), arg->code, nullptr, arg->host,
54                                                               arg->properties.get(), nullptr);
55     if (arg->kill_time >= 0)
56       simcall_process_set_kill_time(actor, arg->kill_time);
57     if (arg->auto_restart)
58       actor->auto_restart_ = arg->auto_restart;
59   }
60   process_list.clear();
61 }
62
63 simgrid::kernel::activity::ExecImplPtr SIMIX_execution_start(std::string name, std::string category,
64                                                              double flops_amount, double priority, double bound,
65                                                              sg_host_t host)
66 {
67   /* set surf's action */
68   simgrid::kernel::resource::Action* surf_action = nullptr;
69   if (not MC_is_active() && not MC_record_replay_is_active()) {
70     surf_action = host->pimpl_cpu->execution_start(flops_amount);
71     surf_action->set_priority(priority);
72     if (bound > 0)
73       surf_action->set_bound(bound);
74   }
75
76   simgrid::kernel::activity::ExecImplPtr exec = simgrid::kernel::activity::ExecImplPtr(
77       new simgrid::kernel::activity::ExecImpl(name, surf_action, /*timeout_detector*/ nullptr, host));
78
79   exec->set_category(category);
80   XBT_DEBUG("Create execute synchro %p: %s", exec.get(), exec->name_.c_str());
81   simgrid::kernel::activity::ExecImpl::on_creation(exec);
82
83   return exec;
84 }
85
86 simgrid::kernel::activity::ExecImplPtr SIMIX_execution_parallel_start(std::string name, int host_nb,
87                                                                       sg_host_t* host_list, double* flops_amount,
88                                                                       double* bytes_amount, double rate, double timeout)
89 {
90
91   /* Check that we are not mixing VMs and PMs in the parallel task */
92   bool is_a_vm = (nullptr != dynamic_cast<simgrid::s4u::VirtualMachine*>(host_list[0]));
93   for (int i = 1; i < host_nb; i++) {
94     bool tmp_is_a_vm = (nullptr != dynamic_cast<simgrid::s4u::VirtualMachine*>(host_list[i]));
95     xbt_assert(is_a_vm == tmp_is_a_vm, "parallel_execute: mixing VMs and PMs is not supported (yet).");
96   }
97
98   /* set surf's synchro */
99   simgrid::kernel::resource::Action* surf_action      = nullptr;
100   simgrid::kernel::resource::Action* timeout_detector = nullptr;
101   if (not MC_is_active() && not MC_record_replay_is_active()) {
102     sg_host_t* host_list_cpy = new sg_host_t[host_nb];
103     std::copy_n(host_list, host_nb, host_list_cpy);
104     surf_action = surf_host_model->execute_parallel(host_nb, host_list_cpy, flops_amount, bytes_amount, rate);
105     if (timeout > 0) {
106       timeout_detector = host_list[0]->pimpl_cpu->sleep(timeout);
107     }
108   }
109
110   simgrid::kernel::activity::ExecImplPtr exec = simgrid::kernel::activity::ExecImplPtr(
111       new simgrid::kernel::activity::ExecImpl(name, surf_action, timeout_detector, nullptr));
112
113   XBT_DEBUG("Create parallel execute synchro %p", exec.get());
114
115   return exec;
116 }
117
118 void simcall_HANDLER_execution_wait(smx_simcall_t simcall, smx_activity_t synchro)
119 {
120   XBT_DEBUG("Wait for execution of synchro %p, state %d", synchro.get(), (int)synchro->state_);
121
122   /* Associate this simcall to the synchro */
123   synchro->simcalls_.push_back(simcall);
124   simcall->issuer->waiting_synchro = synchro;
125
126   /* set surf's synchro */
127   if (MC_is_active() || MC_record_replay_is_active()) {
128     synchro->state_ = SIMIX_DONE;
129     SIMIX_execution_finish(synchro);
130     return;
131   }
132
133   /* If the synchro is already finished then perform the error handling */
134   if (synchro->state_ != SIMIX_RUNNING)
135     SIMIX_execution_finish(synchro);
136 }
137
138 void simcall_HANDLER_execution_test(smx_simcall_t simcall, smx_activity_t synchro)
139 {
140   int res = (synchro->state_ != SIMIX_WAITING && synchro->state_ != SIMIX_RUNNING);
141   if (res) {
142     synchro->simcalls_.push_back(simcall);
143     SIMIX_execution_finish(synchro);
144   } else {
145     SIMIX_simcall_answer(simcall);
146   }
147   simcall_execution_test__set__result(simcall, res);
148 }
149
150 void SIMIX_execution_finish(smx_activity_t synchro)
151 {
152   simgrid::kernel::activity::ExecImplPtr exec =
153       boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(synchro);
154
155   while (not synchro->simcalls_.empty()) {
156     smx_simcall_t simcall = synchro->simcalls_.front();
157     synchro->simcalls_.pop_front();
158     switch (exec->state_) {
159
160       case SIMIX_DONE:
161         /* do nothing, synchro done */
162         XBT_DEBUG("SIMIX_execution_finished: execution successful");
163         break;
164
165       case SIMIX_FAILED:
166         XBT_DEBUG("SIMIX_execution_finished: host '%s' failed", simcall->issuer->host_->get_cname());
167         simcall->issuer->context_->iwannadie = 1;
168         SMX_EXCEPTION(simcall->issuer, host_error, 0, "Host failed");
169         break;
170
171       case SIMIX_CANCELED:
172         XBT_DEBUG("SIMIX_execution_finished: execution canceled");
173         SMX_EXCEPTION(simcall->issuer, cancel_error, 0, "Canceled");
174         break;
175
176       case SIMIX_TIMEOUT:
177         XBT_DEBUG("SIMIX_execution_finished: execution timeouted");
178         SMX_EXCEPTION(simcall->issuer, timeout_error, 0, "Timeouted");
179         break;
180
181       default:
182         xbt_die("Internal error in SIMIX_execution_finish: unexpected synchro state %d", (int)exec->state_);
183     }
184     /* Fail the process if the host is down */
185     if (simcall->issuer->host_->is_off())
186       simcall->issuer->context_->iwannadie = 1;
187
188     simcall->issuer->waiting_synchro = nullptr;
189     simcall_execution_wait__set__result(simcall, exec->state_);
190     SIMIX_simcall_answer(simcall);
191   }
192 }
193
194 void SIMIX_set_category(smx_activity_t synchro, std::string category)
195 {
196   if (synchro->state_ != SIMIX_RUNNING)
197     return;
198
199   simgrid::kernel::activity::ExecImplPtr exec =
200       boost::dynamic_pointer_cast<simgrid::kernel::activity::ExecImpl>(synchro);
201   if (exec != nullptr) {
202     exec->surf_action_->set_category(category);
203     return;
204   }
205
206   simgrid::kernel::activity::CommImplPtr comm =
207       boost::dynamic_pointer_cast<simgrid::kernel::activity::CommImpl>(synchro);
208   if (comm != nullptr) {
209     comm->surfAction_->set_category(category);
210   }
211 }