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 DiskImpl* DiskImpl::set_host(s4u::Host* host)
  38 {
  39   host_ = host;
  40   return this;
  41 }
  42
  43 DiskImpl* DiskImpl::set_read_bandwidth(double read_bw)
  44 {
  45   read_bw_ = read_bw;
  46   return this;
  47 }
  48
  49 DiskImpl* DiskImpl::set_write_bandwidth(double write_bw)
  50 {
  51   write_bw_ = write_bw;
  52   return this;
  53 }
  54
  55 DiskImpl* DiskImpl::set_read_constraint(lmm::Constraint* constraint_read)
  56 {
  57   constraint_read_  = constraint_read;
  58   return this;
  59 }
  60
  61 DiskImpl* DiskImpl::set_write_constraint(lmm::Constraint* constraint_write)
  62 {
  63   constraint_write_  = constraint_write;
  64   return this;
  65 }
  66
  67 /** @brief Fire the required callbacks and destroy the object
  68  *
  69  * Don't delete directly a Disk, call d->destroy() instead.
  70  */
  71 void DiskImpl::destroy()
  72 {
  73   s4u::Disk::on_destruction(this->piface_);
  74   delete this;
  75 }
  76
  77 bool DiskImpl::is_used() const
  78 {
  79   THROW_UNIMPLEMENTED;
  80 }
  81
  82 void DiskImpl::apply_event(kernel::profile::Event* /*event*/, double /*value*/)
  83 {
  84   THROW_UNIMPLEMENTED;
  85 }
  86
  87 void DiskImpl::turn_on()
  88 {
  89   if (not is_on()) {
  90     Resource::turn_on();
  91     s4u::Disk::on_state_change(this->piface_);
  92   }
  93 }
  94 void DiskImpl::turn_off()
  95 {
  96   if (is_on()) {
  97     Resource::turn_off();
  98     s4u::Disk::on_state_change(this->piface_);
  99   }
 100 }
 101
 102 void DiskImpl::seal()
 103 {
 104   lmm::System* maxmin_system = get_model()->get_maxmin_system();
 105   this->set_read_constraint(maxmin_system->constraint_new(this, read_bw_))
 106       ->set_write_constraint(maxmin_system->constraint_new(this, write_bw_))
 107       ->set_constraint(maxmin_system->constraint_new(this, std::max(read_bw_, write_bw_)));
 108   XBT_DEBUG("Create resource with read_bw '%f' write_bw '%f'", read_bw_, write_bw_);
 109   Resource::seal();
 110   turn_on();
 111 }
 112 xbt::signal<void(DiskAction const&, Action::State, Action::State)> DiskAction::on_state_change;
 113
 114 /**********
 115  * Action *
 116  **********/
 117 void DiskAction::set_state(Action::State state)
 118 {
 119   Action::State old = get_state();
 120   Action::set_state(state);
 121   on_state_change(*this, old, state);
 122 }
 123 } // namespace resource
 124 } // namespace kernel
 125 } // namespace simgrid