src/surf/disk_s19.cpp

   1 /* Copyright (c) 2013-2022. 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 "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/profile/Event.hpp"
  15 #include "src/surf/disk_s19.hpp"
  16
  17 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(res_disk);
  18 /***********
  19  * Options *
  20  ***********/
  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);
  24
  25 /*********
  26  * Model *
  27  *********/
  28
  29 void surf_disk_model_init_S19()
  30 {
  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
  48 DiskImpl* DiskS19Model::create_disk(const std::string& name, double read_bandwidth, double write_bandwidth)
  49 {
  50   return (new DiskS19(name, read_bandwidth, write_bandwidth))->set_model(this);
  51 }
  52
  53 void DiskS19Model::update_actions_state(double /*now*/, double delta)
  54 {
  55   for (auto it = std::begin(*get_started_action_set()); it != std::end(*get_started_action_set());) {
  56     auto& action = *it;
  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);
  60
  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);
  64     }
  65   }
  66 }
  67
  68 DiskAction* DiskS19::io_start(sg_size_t size, s4u::Io::OpType type)
  69 {
  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);
  72   switch (type) {
  73     case s4u::Io::OpType::READ:
  74       get_model()->get_maxmin_system()->expand(get_read_constraint(), action->get_variable(), 1.0);
  75       break;
  76     case s4u::Io::OpType::WRITE:
  77       get_model()->get_maxmin_system()->expand(get_write_constraint(), action->get_variable(), 1.0);
  78       break;
  79     default:
  80       THROW_UNIMPLEMENTED;
  81   }
  82   if (const auto& factor_cb = get_factor_cb()) { // handling disk variability
  83     action->set_rate_factor(factor_cb(size, type));
  84   }
  85   return action;
  86 }
  87
  88 /************
  89  * Resource *
  90  ************/
  91 void DiskS19::set_read_bandwidth(double value)
  92 {
  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());
  96   }
  97 }
  98
  99 void DiskS19::set_write_bandwidth(double value)
 100 {
 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());
 104   }
 105 }
 106
 107 void DiskS19::set_readwrite_bandwidth(double value)
 108 {
 109   DiskImpl::set_readwrite_bandwidth(value);
 110   if (get_constraint()) {
 111     get_model()->get_maxmin_system()->update_constraint_bound(get_constraint(), get_readwrite_bandwidth());
 112   }
 113 }
 114
 115 void DiskS19::apply_event(kernel::profile::Event* triggered, double value)
 116 {
 117   /* Find out which of my iterators was triggered, and react accordingly */
 118   if (triggered == get_read_event()) {
 119     set_read_bandwidth(value);
 120     unref_read_event();
 121   } else if (triggered == get_write_event()) {
 122     set_write_bandwidth(value);
 123     unref_write_event();
 124   } else if (triggered == get_state_event()) {
 125     if (value > 0)
 126       turn_on();
 127     else
 128       turn_off();
 129     unref_state_event();
 130   } else {
 131     xbt_die("Unknown event!\n");
 132   }
 133
 134   XBT_DEBUG("There was a resource state event, need to update actions related to the constraint (%p)",
 135             get_constraint());
 136 }
 137
 138 /**********
 139  * Action *
 140  **********/
 141
 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))
 144 {
 145 }
 146
 147 } // namespace simgrid::kernel::resource