1 /* Copyright (c) 2013-2022. The SimGrid Team. All rights reserved. */
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. */
6 #include "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>
12 #include "src/kernel/EngineImpl.hpp"
13 #include "src/kernel/lmm/maxmin.hpp"
14 #include "src/kernel/resource/profile/Event.hpp"
15 #include "src/surf/disk_s19.hpp"
17 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(res_disk);
21 static simgrid::config::Flag<std::string> cfg_disk_solver("disk/solver",
22 "Set linear equations solver used by disk model", "maxmin",
23 &simgrid::kernel::lmm::System::validate_solver);
29 void surf_disk_model_init_S19()
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);
37 namespace simgrid::kernel::resource {
42 DiskS19Model::DiskS19Model(const std::string& name) : DiskModel(name)
44 set_maxmin_system(lmm::System::build(cfg_disk_solver.get(), true /* selective update */));
48 DiskImpl* DiskS19Model::create_disk(const std::string& name, double read_bandwidth, double write_bandwidth)
50 return (new DiskS19(name, read_bandwidth, write_bandwidth))->set_model(this);
53 void DiskS19Model::update_actions_state(double /*now*/, double delta)
55 for (auto it = std::begin(*get_started_action_set()); it != std::end(*get_started_action_set());) {
57 ++it; // increment iterator here since the following calls to action.finish() may invalidate it
58 action.update_remains(rint(action.get_rate() * delta));
59 action.update_max_duration(delta);
61 if (((action.get_remains_no_update() <= 0) && (action.get_variable()->get_penalty() > 0)) ||
62 ((action.get_max_duration() != NO_MAX_DURATION) && (action.get_max_duration() <= 0))) {
63 action.finish(Action::State::FINISHED);
68 DiskAction* DiskS19::io_start(sg_size_t size, s4u::Io::OpType type)
70 auto* action = new DiskS19Action(get_model(), static_cast<double>(size), not is_on());
71 get_model()->get_maxmin_system()->expand(get_constraint(), action->get_variable(), 1.0);
73 case s4u::Io::OpType::READ:
74 get_model()->get_maxmin_system()->expand(get_read_constraint(), action->get_variable(), 1.0);
76 case s4u::Io::OpType::WRITE:
77 get_model()->get_maxmin_system()->expand(get_write_constraint(), action->get_variable(), 1.0);
82 if (const auto& factor_cb = get_factor_cb()) { // handling disk variability
83 action->set_rate_factor(factor_cb(size, type));
91 void DiskS19::set_read_bandwidth(double value)
93 DiskImpl::set_read_bandwidth(value);
94 if (get_read_constraint()) {
95 get_model()->get_maxmin_system()->update_constraint_bound(get_read_constraint(), get_read_bandwidth());
99 void DiskS19::set_write_bandwidth(double value)
101 DiskImpl::set_write_bandwidth(value);
102 if (get_write_constraint()) {
103 get_model()->get_maxmin_system()->update_constraint_bound(get_write_constraint(), get_write_bandwidth());
107 void DiskS19::set_readwrite_bandwidth(double value)
109 DiskImpl::set_readwrite_bandwidth(value);
110 if (get_constraint()) {
111 get_model()->get_maxmin_system()->update_constraint_bound(get_constraint(), get_readwrite_bandwidth());
115 void DiskS19::apply_event(kernel::profile::Event* triggered, double value)
117 /* Find out which of my iterators was triggered, and react accordingly */
118 if (triggered == get_read_event()) {
119 set_read_bandwidth(value);
121 } else if (triggered == get_write_event()) {
122 set_write_bandwidth(value);
124 } else if (triggered == get_state_event()) {
131 xbt_die("Unknown event!\n");
134 XBT_DEBUG("There was a resource state event, need to update actions related to the constraint (%p)",
142 DiskS19Action::DiskS19Action(Model* model, double cost, bool failed)
143 : DiskAction(model, cost, failed, model->get_maxmin_system()->variable_new(this, 1.0, -1.0, 3))
147 } // namespace simgrid::kernel::resource