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