src/surf/disk_s19.cpp

   1 /* Copyright (c) 2013-2021. 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 "disk_s19.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 #include "src/kernel/EngineImpl.hpp"
  12 #include "src/kernel/lmm/maxmin.hpp"
  13 #include "src/kernel/resource/profile/Event.hpp"
  14 #include "src/surf/xml/platf.hpp"
  15 #include "surf/surf.hpp"
  16
  17 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(res_disk);
  18
  19 /*********
  20  * Model *
  21  *********/
  22
  23 void surf_disk_model_init_default()
  24 {
  25   auto disk_model = std::make_shared<simgrid::kernel::resource::DiskS19Model>("Disk");
  26   auto* engine    = simgrid::kernel::EngineImpl::get_instance();
  27   engine->add_model(disk_model);
  28   engine->get_netzone_root()->set_disk_model(disk_model);
  29 }
  30
  31 namespace simgrid {
  32 namespace kernel {
  33 namespace resource {
  34
  35 DiskImpl* DiskS19Model::create_disk(const std::string& name, double read_bandwidth, double write_bandwidth)
  36 {
  37   return (new DiskS19(name, read_bandwidth, write_bandwidth))->set_model(this);
  38 }
  39
  40 void DiskS19Model::update_actions_state(double /*now*/, double delta)
  41 {
  42   for (auto it = std::begin(*get_started_action_set()); it != std::end(*get_started_action_set());) {
  43     auto& action = *it;
  44     ++it; // increment iterator here since the following calls to action.finish() may invalidate it
  45     action.update_remains(rint(action.get_rate() * delta));
  46     action.update_max_duration(delta);
  47
  48     if (((action.get_remains_no_update() <= 0) && (action.get_variable()->get_penalty() > 0)) ||
  49         ((action.get_max_duration() != NO_MAX_DURATION) && (action.get_max_duration() <= 0))) {
  50       action.finish(Action::State::FINISHED);
  51     }
  52   }
  53 }
  54
  55 DiskAction* DiskS19Model::io_start(const DiskImpl* disk, sg_size_t size, s4u::Io::OpType type)
  56 {
  57   auto* action = new DiskS19Action(this, static_cast<double>(size), not disk->is_on());
  58   get_maxmin_system()->expand(disk->get_constraint(), action->get_variable(), 1.0);
  59   switch (type) {
  60     case s4u::Io::OpType::READ:
  61       get_maxmin_system()->expand(disk->get_read_constraint(), action->get_variable(), 1.0);
  62       break;
  63     case s4u::Io::OpType::WRITE:
  64       get_maxmin_system()->expand(disk->get_write_constraint(), action->get_variable(), 1.0);
  65       break;
  66     default:
  67       THROW_UNIMPLEMENTED;
  68   }
  69   const auto& factor_cb = disk->get_factor_cb();
  70   if (factor_cb) { // handling disk variability
  71     action->set_rate_factor(factor_cb(size, type));
  72   }
  73   return action;
  74 }
  75
  76 /************
  77  * Resource *
  78  ************/
  79 void DiskS19::set_read_bandwidth(double value)
  80 {
  81   read_bw_.peak = value;
  82
  83   if (get_read_constraint()) {
  84     get_model()->get_maxmin_system()->update_constraint_bound(get_read_constraint(), read_bw_.peak * read_bw_.scale);
  85   }
  86 }
  87
  88 void DiskS19::set_write_bandwidth(double value)
  89 {
  90   write_bw_.peak = value;
  91
  92   if (get_write_constraint()) {
  93     get_model()->get_maxmin_system()->update_constraint_bound(get_write_constraint(), write_bw_.peak * write_bw_.scale);
  94   }
  95 }
  96
  97 void DiskS19::set_readwrite_bandwidth(double value)
  98 {
  99   readwrite_bw_ = value;
 100   if (get_constraint()) {
 101     get_model()->get_maxmin_system()->update_constraint_bound(get_constraint(), readwrite_bw_);
 102   }
 103 }
 104
 105 void DiskS19::apply_event(kernel::profile::Event* triggered, double value)
 106 {
 107   /* Find out which of my iterators was triggered, and react accordingly */
 108   if (triggered == read_bw_.event) {
 109     set_read_bandwidth(value);
 110     tmgr_trace_event_unref(&read_bw_.event);
 111
 112   } else if (triggered == write_bw_.event) {
 113     set_write_bandwidth(value);
 114     tmgr_trace_event_unref(&write_bw_.event);
 115
 116   } else if (triggered == state_event_) {
 117     if (value > 0)
 118       turn_on();
 119     else
 120       turn_off();
 121     tmgr_trace_event_unref(&state_event_);
 122   } else {
 123     xbt_die("Unknown event!\n");
 124   }
 125
 126   XBT_DEBUG("There was a resource state event, need to update actions related to the constraint (%p)",
 127             get_constraint());
 128 }
 129
 130 /**********
 131  * Action *
 132  **********/
 133
 134 DiskS19Action::DiskS19Action(Model* model, double cost, bool failed)
 135     : DiskAction(model, cost, failed, model->get_maxmin_system()->variable_new(this, 1.0, -1.0, 3))
 136 {
 137 }
 138
 139 void DiskS19Action::update_remains_lazy(double /*now*/)
 140 {
 141   THROW_IMPOSSIBLE;
 142 }
 143 } // namespace resource
 144 } // namespace kernel
 145 } // namespace simgrid