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[simgrid.git] / src / kernel / resource / models / disk_s19.cpp
1 /* Copyright (c) 2013-2023. 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/simgrid/sg_config.hpp"
7 #include <simgrid/kernel/routing/NetPoint.hpp>
8 #include <simgrid/kernel/routing/NetZoneImpl.hpp>
9 #include <simgrid/s4u/Engine.hpp>
10 #include <simgrid/s4u/Host.hpp>
11
12 #include "src/kernel/EngineImpl.hpp"
13 #include "src/kernel/lmm/maxmin.hpp"
14 #include "src/kernel/resource/models/disk_s19.hpp"
15 #include "src/kernel/resource/profile/Event.hpp"
16 #include "src/simgrid/module.hpp"
17
18 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(res_disk);
19 /***********
20  * Options *
21  ***********/
22 static simgrid::config::Flag<std::string> cfg_disk_solver("disk/solver",
23                                                           "Set linear equations solver used by disk model", "maxmin",
24                                                           &simgrid::kernel::lmm::System::validate_solver);
25
26 /*********
27  * Model *
28  *********/
29
30 SIMGRID_REGISTER_DISK_MODEL(S19, "Simplistic disk model.", []() {
31   auto disk_model = std::make_shared<simgrid::kernel::resource::DiskS19Model>("Disk");
32   auto* engine    = simgrid::kernel::EngineImpl::get_instance();
33   engine->add_model(disk_model);
34   engine->get_netzone_root()->set_disk_model(disk_model);
35 });
36
37 namespace simgrid::kernel::resource {
38 /*********
39  * Model *
40  *********/
41
42 DiskS19Model::DiskS19Model(const std::string& name) : DiskModel(name)
43 {
44   set_maxmin_system(lmm::System::build(cfg_disk_solver.get(), true /* selective update */));
45 }
46
47 DiskImpl* DiskS19Model::create_disk(const std::string& name, double read_bandwidth, double write_bandwidth)
48 {
49   return (new DiskS19(name, read_bandwidth, write_bandwidth))->set_model(this);
50 }
51
52 void DiskS19Model::update_actions_state(double /*now*/, double delta)
53 {
54   for (auto it = std::begin(*get_started_action_set()); it != std::end(*get_started_action_set());) {
55     auto& action = *it;
56     ++it; // increment iterator here since the following calls to action.finish() may invalidate it
57     action.update_remains(rint(action.get_rate() * delta));
58     action.update_max_duration(delta);
59
60     if (((action.get_remains_no_update() <= 0) && (action.get_variable()->get_penalty() > 0)) ||
61         ((action.get_max_duration() != NO_MAX_DURATION) && (action.get_max_duration() <= 0))) {
62       action.finish(Action::State::FINISHED);
63     }
64   }
65 }
66
67 /************
68  * Resource *
69  ************/
70
71 void DiskS19::apply_event(kernel::profile::Event* triggered, double value)
72 {
73   /* Find out which of my iterators was triggered, and react accordingly */
74   if (triggered == get_read_event()) {
75     set_read_bandwidth(value);
76     unref_read_event();
77   } else if (triggered == get_write_event()) {
78     set_write_bandwidth(value);
79     unref_write_event();
80   } else if (triggered == get_state_event()) {
81     if (value > 0)
82       turn_on();
83     else
84       turn_off();
85     unref_state_event();
86   } else {
87     xbt_die("Unknown event!\n");
88   }
89
90   XBT_DEBUG("There was a resource state event, need to update actions related to the constraint (%p)",
91             get_constraint());
92 }
93
94 /**********
95  * Action *
96  **********/
97
98 DiskS19Action::DiskS19Action(Model* model, double cost, bool failed)
99     : DiskAction(model, cost, failed, model->get_maxmin_system()->variable_new(this, 1.0, -1.0, 3))
100 {
101 }
102
103 DiskAction* DiskS19::io_start(sg_size_t size, s4u::Io::OpType type)
104 {
105   auto* action = new DiskS19Action(get_model(), static_cast<double>(size), not is_on());
106   get_model()->get_maxmin_system()->expand(get_constraint(), action->get_variable(), 1.0);
107   switch (type) {
108     case s4u::Io::OpType::READ:
109       get_model()->get_maxmin_system()->expand(get_read_constraint(), action->get_variable(), 1.0);
110       break;
111     case s4u::Io::OpType::WRITE:
112       get_model()->get_maxmin_system()->expand(get_write_constraint(), action->get_variable(), 1.0);
113       break;
114     default:
115       THROW_UNIMPLEMENTED;
116   }
117   if (const auto& factor_cb = get_factor_cb()) { // handling disk variability
118     action->set_rate_factor(factor_cb(size, type));
119   }
120   return action;
121 }
122
123 } // namespace simgrid::kernel::resource