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cosmetic cleanups in network models
[simgrid.git] / src / surf / cpu_cas01.cpp
1 /* Copyright (c) 2009-2019. 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 "cpu_cas01.hpp"
7 #include "simgrid/sg_config.hpp"
8 #include "src/surf/cpu_ti.hpp"
9 #include "src/surf/surf_interface.hpp"
10 #include "surf/surf.hpp"
11
12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_cas, surf_cpu, "Logging specific to the SURF CPU module");
13
14 /***********
15  * Options *
16  ***********/
17
18 static simgrid::config::Flag<std::string>
19     cpu_optim_opt("cpu/optim", "Optimization algorithm to use for CPU resources. ", "Lazy",
20
21                   std::map<std::string, std::string>({
22                       {"Lazy", "Lazy action management (partial invalidation in lmm + heap in action remaining)."},
23                       {"TI", "Trace integration. Highly optimized mode when using availability traces (only available "
24                              "for the Cas01 CPU model for now)."},
25                       {"Full", "Full update of remaining and variables. Slow but may be useful when debugging."},
26                   }),
27
28                   [](std::string const&) {
29                     xbt_assert(_sg_cfg_init_status < 2,
30                                "Cannot change the optimization algorithm after the initialization");
31                   });
32
33 /*********
34  * Model *
35  *********/
36 void surf_cpu_model_init_Cas01()
37 {
38   xbt_assert(surf_cpu_model_pm == nullptr, "CPU model already initialized. This should not happen.");
39   xbt_assert(surf_cpu_model_vm == nullptr, "CPU model already initialized. This should not happen.");
40
41   if (cpu_optim_opt == "TI") {
42     simgrid::surf::CpuTiModel::create_pm_vm_models();
43     return;
44   }
45
46   simgrid::kernel::resource::Model::UpdateAlgo algo;
47   if (cpu_optim_opt == "Lazy")
48     algo = simgrid::kernel::resource::Model::UpdateAlgo::LAZY;
49   else
50     algo = simgrid::kernel::resource::Model::UpdateAlgo::FULL;
51
52   surf_cpu_model_pm = new simgrid::surf::CpuCas01Model(algo);
53   surf_cpu_model_vm = new simgrid::surf::CpuCas01Model(algo);
54 }
55
56 namespace simgrid {
57 namespace surf {
58
59 CpuCas01Model::CpuCas01Model(kernel::resource::Model::UpdateAlgo algo) : kernel::resource::CpuModel(algo)
60 {
61   all_existing_models.push_back(this);
62
63   bool select = config::get_value<bool>("cpu/maxmin-selective-update");
64
65   if (algo == Model::UpdateAlgo::LAZY) {
66     xbt_assert(select || config::is_default("cpu/maxmin-selective-update"),
67                "You cannot disable cpu selective update when using the lazy update mechanism");
68     select = true;
69   }
70
71   set_maxmin_system(new kernel::lmm::System(select));
72 }
73
74 CpuCas01Model::~CpuCas01Model()
75 {
76   surf_cpu_model_pm = nullptr;
77 }
78
79 kernel::resource::Cpu* CpuCas01Model::create_cpu(s4u::Host* host, const std::vector<double>& speed_per_pstate, int core)
80 {
81   return new CpuCas01(this, host, speed_per_pstate, core);
82 }
83
84 /************
85  * Resource *
86  ************/
87 CpuCas01::CpuCas01(CpuCas01Model* model, s4u::Host* host, const std::vector<double>& speed_per_pstate, int core)
88     : Cpu(model, host, model->get_maxmin_system()->constraint_new(this, core * speed_per_pstate.front()),
89           speed_per_pstate, core)
90 {
91 }
92
93 CpuCas01::~CpuCas01() = default;
94
95 bool CpuCas01::is_used()
96 {
97   return get_model()->get_maxmin_system()->constraint_used(get_constraint());
98 }
99
100 /** @brief take into account changes of speed (either load or max) */
101 void CpuCas01::on_speed_change()
102 {
103   kernel::lmm::Variable* var = nullptr;
104   const kernel::lmm::Element* elem = nullptr;
105
106   get_model()->get_maxmin_system()->update_constraint_bound(get_constraint(),
107                                                             get_core_count() * speed_.scale * speed_.peak);
108   while ((var = get_constraint()->get_variable(&elem))) {
109     CpuCas01Action* action = static_cast<CpuCas01Action*>(var->get_id());
110
111     get_model()->get_maxmin_system()->update_variable_bound(action->get_variable(),
112                                                             action->requested_core() * speed_.scale * speed_.peak);
113   }
114
115   Cpu::on_speed_change();
116 }
117
118 void CpuCas01::apply_event(kernel::profile::Event* event, double value)
119 {
120   if (event == speed_.event) {
121     /* TODO (Hypervisor): do the same thing for constraint_core[i] */
122     xbt_assert(get_core_count() == 1, "FIXME: add speed scaling code also for constraint_core[i]");
123
124     speed_.scale = value;
125     on_speed_change();
126
127     tmgr_trace_event_unref(&speed_.event);
128   } else if (event == state_event_) {
129     /* TODO (Hypervisor): do the same thing for constraint_core[i] */
130     xbt_assert(get_core_count() == 1, "FIXME: add state change code also for constraint_core[i]");
131
132     if (value > 0) {
133       if (not is_on()) {
134         XBT_VERB("Restart processes on host %s", get_host()->get_cname());
135         get_host()->turn_on();
136       }
137     } else {
138       kernel::lmm::Constraint* cnst = get_constraint();
139       kernel::lmm::Variable* var    = nullptr;
140       const kernel::lmm::Element* elem = nullptr;
141       double date              = surf_get_clock();
142
143       get_host()->turn_off();
144
145       while ((var = cnst->get_variable(&elem))) {
146         kernel::resource::Action* action = static_cast<kernel::resource::Action*>(var->get_id());
147
148         if (action->get_state() == kernel::resource::Action::State::INITED ||
149             action->get_state() == kernel::resource::Action::State::STARTED ||
150             action->get_state() == kernel::resource::Action::State::IGNORED) {
151           action->set_finish_time(date);
152           action->set_state(kernel::resource::Action::State::FAILED);
153         }
154       }
155     }
156     tmgr_trace_event_unref(&state_event_);
157
158   } else {
159     xbt_die("Unknown event!\n");
160   }
161 }
162
163 /** @brief Start a new execution on this CPU lasting @param size flops and using one core */
164 kernel::resource::CpuAction* CpuCas01::execution_start(double size)
165 {
166   return new CpuCas01Action(get_model(), size, not is_on(), speed_.scale * speed_.peak, get_constraint());
167 }
168
169 kernel::resource::CpuAction* CpuCas01::execution_start(double size, int requested_cores)
170 {
171   return new CpuCas01Action(get_model(), size, not is_on(), speed_.scale * speed_.peak, get_constraint(),
172                             requested_cores);
173 }
174
175 kernel::resource::CpuAction* CpuCas01::sleep(double duration)
176 {
177   if (duration > 0)
178     duration = std::max(duration, sg_surf_precision);
179
180   XBT_IN("(%s,%g)", get_cname(), duration);
181   CpuCas01Action* action =
182       new CpuCas01Action(get_model(), 1.0, not is_on(), speed_.scale * speed_.peak, get_constraint());
183
184   // FIXME: sleep variables should not consume 1.0 in System::expand()
185   action->set_max_duration(duration);
186   action->set_suspend_state(kernel::resource::Action::SuspendStates::SLEEPING);
187   if (duration == NO_MAX_DURATION)
188     action->set_state(simgrid::kernel::resource::Action::State::IGNORED);
189
190   get_model()->get_maxmin_system()->update_variable_weight(action->get_variable(), 0.0);
191   if (get_model()->get_update_algorithm() == kernel::resource::Model::UpdateAlgo::LAZY) { // remove action from the heap
192     get_model()->get_action_heap().remove(action);
193     // this is necessary for a variable with weight 0 since such variables are ignored in lmm and we need to set its
194     // max_duration correctly at the next call to share_resources
195     get_model()->get_modified_set()->push_front(*action);
196   }
197
198   XBT_OUT();
199   return action;
200 }
201
202 /**********
203  * Action *
204  **********/
205 CpuCas01Action::CpuCas01Action(kernel::resource::Model* model, double cost, bool failed, double speed,
206                                kernel::lmm::Constraint* constraint, int requested_core)
207     : CpuAction(model, cost, failed,
208                 model->get_maxmin_system()->variable_new(this, 1.0 / requested_core, requested_core * speed, 1))
209     , requested_core_(requested_core)
210 {
211   if (model->get_update_algorithm() == kernel::resource::Model::UpdateAlgo::LAZY)
212     set_last_update();
213   model->get_maxmin_system()->expand(constraint, get_variable(), 1.0);
214 }
215
216 CpuCas01Action::CpuCas01Action(kernel::resource::Model* model, double cost, bool failed, double speed,
217                                kernel::lmm::Constraint* constraint)
218     : CpuCas01Action(model, cost, failed, speed, constraint, /* requested_core */ 1)
219 {
220 }
221
222 int CpuCas01Action::requested_core()
223 {
224   return requested_core_;
225 }
226
227 CpuCas01Action::~CpuCas01Action()=default;
228
229 }
230 }