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 namespace simgrid {
  15 namespace kernel {
  16 namespace resource {
  17
  18 /*********
  19  * Model *
  20  *********/
  21
  22 DiskModel::DiskModel() : Model(Model::UpdateAlgo::FULL)
  23 {
  24   set_maxmin_system(new simgrid::kernel::lmm::System(true /* selective update */));
  25 }
  26
  27 DiskModel::~DiskModel()
  28 {
  29 }
  30
  31 /************
  32  * Resource *
  33  ************/
  34 DiskImpl* DiskImpl::set_host(s4u::Host* host)
  35 {
  36   host_ = host;
  37   return this;
  38 }
  39
  40 DiskImpl* DiskImpl::set_read_bandwidth(double read_bw)
  41 {
  42   read_bw_ = read_bw;
  43   return this;
  44 }
  45
  46 DiskImpl* DiskImpl::set_write_bandwidth(double write_bw)
  47 {
  48   write_bw_ = write_bw;
  49   return this;
  50 }
  51
  52 DiskImpl* DiskImpl::set_read_constraint(lmm::Constraint* constraint_read)
  53 {
  54   constraint_read_ = constraint_read;
  55   return this;
  56 }
  57
  58 DiskImpl* DiskImpl::set_write_constraint(lmm::Constraint* constraint_write)
  59 {
  60   constraint_write_ = constraint_write;
  61   return this;
  62 }
  63
  64 /** @brief Fire the required callbacks and destroy the object
  65  *
  66  * Don't delete directly a Disk, call d->destroy() instead.
  67  */
  68 void DiskImpl::destroy()
  69 {
  70   s4u::Disk::on_destruction(this->piface_);
  71   delete this;
  72 }
  73
  74 bool DiskImpl::is_used() const
  75 {
  76   THROW_UNIMPLEMENTED;
  77 }
  78
  79 void DiskImpl::apply_event(kernel::profile::Event* /*event*/, double /*value*/)
  80 {
  81   THROW_UNIMPLEMENTED;
  82 }
  83
  84 void DiskImpl::turn_on()
  85 {
  86   if (not is_on()) {
  87     Resource::turn_on();
  88     s4u::Disk::on_state_change(this->piface_);
  89   }
  90 }
  91 void DiskImpl::turn_off()
  92 {
  93   if (is_on()) {
  94     Resource::turn_off();
  95     s4u::Disk::on_state_change(this->piface_);
  96   }
  97 }
  98
  99 void DiskImpl::seal()
 100 {
 101   xbt_assert(this->get_model(), "Cannot seal Disk (%s) without setting the model first", this->get_cname());
 102   lmm::System* maxmin_system = get_model()->get_maxmin_system();
 103   this->set_read_constraint(maxmin_system->constraint_new(this, read_bw_))
 104       ->set_write_constraint(maxmin_system->constraint_new(this, write_bw_))
 105       ->set_constraint(maxmin_system->constraint_new(this, std::max(read_bw_, write_bw_)));
 106   XBT_DEBUG("Create resource with read_bw '%f' write_bw '%f'", read_bw_, write_bw_);
 107   Resource::seal();
 108   turn_on();
 109 }
 110 xbt::signal<void(DiskAction const&, Action::State, Action::State)> DiskAction::on_state_change;
 111
 112 /**********
 113  * Action *
 114  **********/
 115 void DiskAction::set_state(Action::State state)
 116 {
 117   Action::State old = get_state();
 118   Action::set_state(state);
 119   on_state_change(*this, old, state);
 120 }
 121 } // namespace resource
 122 } // namespace kernel
 123 } // namespace simgrid