1 /* Copyright (c) 2013-2023. 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/models/disk_s19.hpp"
15 #include "src/kernel/resource/profile/Event.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 SIMGRID_REGISTER_DISK_MODEL(S19, "Simplistic disk model.", []() {
30 auto disk_model = std::make_shared<simgrid::kernel::resource::DiskS19Model>("Disk");
31 auto* engine = simgrid::kernel::EngineImpl::get_instance();
32 engine->add_model(disk_model);
33 engine->get_netzone_root()->set_disk_model(disk_model);
36 namespace simgrid::kernel::resource {
41 DiskS19Model::DiskS19Model(const std::string& name) : DiskModel(name)
43 set_maxmin_system(lmm::System::build(cfg_disk_solver.get(), true /* selective update */));
46 DiskImpl* DiskS19Model::create_disk(const std::string& name, double read_bandwidth, double write_bandwidth)
48 return (new DiskS19(name, read_bandwidth, write_bandwidth))->set_model(this);
51 void DiskS19Model::update_actions_state(double /*now*/, double delta)
53 for (auto it = std::begin(*get_started_action_set()); it != std::end(*get_started_action_set());) {
55 ++it; // increment iterator here since the following calls to action.finish() may invalidate it
56 action.update_remains(rint(action.get_rate() * delta));
57 action.update_max_duration(delta);
59 if (((action.get_remains_no_update() <= 0) && (action.get_variable()->get_penalty() > 0)) ||
60 ((action.get_max_duration() != NO_MAX_DURATION) && (action.get_max_duration() <= 0))) {
61 action.finish(Action::State::FINISHED);
70 void DiskS19::apply_event(kernel::profile::Event* triggered, double value)
72 /* Find out which of my iterators was triggered, and react accordingly */
73 if (triggered == get_read_event()) {
74 set_read_bandwidth(value);
76 } else if (triggered == get_write_event()) {
77 set_write_bandwidth(value);
79 } else if (triggered == get_state_event()) {
86 xbt_die("Unknown event!\n");
89 XBT_DEBUG("There was a resource state event, need to update actions related to the constraint (%p)",
97 DiskS19Action::DiskS19Action(Model* model, double cost, bool failed)
98 : DiskAction(model, cost, failed, model->get_maxmin_system()->variable_new(this, 1.0, -1.0, 3))
102 DiskAction* DiskS19::io_start(sg_size_t size, s4u::Io::OpType type)
104 auto* action = new DiskS19Action(get_model(), static_cast<double>(size), not is_on());
105 get_model()->get_maxmin_system()->expand(get_constraint(), action->get_variable(), 1.0);
107 case s4u::Io::OpType::READ:
108 get_model()->get_maxmin_system()->expand(get_read_constraint(), action->get_variable(), 1.0);
110 case s4u::Io::OpType::WRITE:
111 get_model()->get_maxmin_system()->expand(get_write_constraint(), action->get_variable(), 1.0);
116 if (const auto& factor_cb = get_factor_cb()) { // handling disk variability
117 action->set_rate_factor(factor_cb(size, type));
122 } // namespace simgrid::kernel::resource