src/kernel/resource/DiskImpl.cpp

   1 /* Copyright (c) 2019-2021. 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 "DiskImpl.hpp"
   7
   8 #include "simgrid/s4u/Engine.hpp"
   9 #include "src/kernel/EngineImpl.hpp"
  10 #include "src/kernel/lmm/maxmin.hpp"
  11
  12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(res_disk, ker_resource, "Disk resources, fuelling I/O activities");
  13
  14 simgrid::kernel::resource::DiskModel* surf_disk_model = nullptr;
  15
  16 namespace simgrid {
  17 namespace kernel {
  18 namespace resource {
  19
  20 /*********
  21  * Model *
  22  *********/
  23
  24 DiskModel::DiskModel() : Model(Model::UpdateAlgo::FULL)
  25 {
  26   set_maxmin_system(new simgrid::kernel::lmm::System(true /* selective update */));
  27 }
  28
  29 DiskModel::~DiskModel()
  30 {
  31   surf_disk_model = nullptr;
  32 }
  33
  34 /************
  35  * Resource *
  36  ************/
  37
  38 DiskImpl* DiskImpl::set_read_bandwidth(double read_bw)
  39 {
  40   read_bw_ = read_bw;
  41   return this;
  42 }
  43
  44 DiskImpl* DiskImpl::set_write_bandwidth(double write_bw)
  45 {
  46   write_bw_ = write_bw;
  47   return this;
  48 }
  49
  50 DiskImpl* DiskImpl::set_read_constraint(lmm::Constraint* constraint_read)
  51 {
  52   constraint_read_  = constraint_read;
  53   return this;
  54 }
  55
  56 DiskImpl* DiskImpl::set_write_constraint(lmm::Constraint* constraint_write)
  57 {
  58   constraint_write_  = constraint_write;
  59   return this;
  60 }
  61
  62 /** @brief Fire the required callbacks and destroy the object
  63  *
  64  * Don't delete directly a Disk, call d->destroy() instead.
  65  */
  66 void DiskImpl::destroy()
  67 {
  68   s4u::Disk::on_destruction(this->piface_);
  69   delete this;
  70 }
  71
  72 bool DiskImpl::is_used() const
  73 {
  74   THROW_UNIMPLEMENTED;
  75 }
  76
  77 void DiskImpl::apply_event(kernel::profile::Event* /*event*/, double /*value*/)
  78 {
  79   THROW_UNIMPLEMENTED;
  80 }
  81
  82 void DiskImpl::turn_on()
  83 {
  84   if (not is_on()) {
  85     Resource::turn_on();
  86     s4u::Disk::on_state_change(this->piface_);
  87   }
  88 }
  89 void DiskImpl::turn_off()
  90 {
  91   if (is_on()) {
  92     Resource::turn_off();
  93     s4u::Disk::on_state_change(this->piface_);
  94   }
  95 }
  96
  97 void DiskImpl::seal()
  98 {
  99   lmm::System* maxmin_system = surf_disk_model->get_maxmin_system();
 100   this->set_read_constraint(maxmin_system->constraint_new(this, read_bw_))
 101           ->set_write_constraint(maxmin_system->constraint_new(this, write_bw_))
 102           ->set_model(surf_disk_model)
 103           ->set_constraint(maxmin_system->constraint_new(this, std::max(read_bw_, write_bw_)));
 104   XBT_DEBUG("Create resource with read_bw '%f' write_bw '%f'", read_bw_, write_bw_);
 105   turn_on();
 106 }
 107 xbt::signal<void(DiskAction const&, Action::State, Action::State)> DiskAction::on_state_change;
 108
 109 /**********
 110  * Action *
 111  **********/
 112 void DiskAction::set_state(Action::State state)
 113 {
 114   Action::State old = get_state();
 115   Action::set_state(state);
 116   on_state_change(*this, old, state);
 117 }
 118 } // namespace resource
 119 } // namespace kernel
 120 } // namespace simgrid