+++ /dev/null
-/* Copyright (c) 2022. The SimGrid Team. All rights reserved. */
-
-/* This program is free software; you can redistribute it and/or modify it
- * under the terms of the license (GNU LGPL) which comes with this package. */
-
-#include <simgrid/kernel/routing/NetZoneImpl.hpp>
-#include <simgrid/s4u/Engine.hpp>
-#include <xbt/config.hpp>
-
-#include "simgrid/config.h"
-#include "src/kernel/EngineImpl.hpp"
-#if SIMGRID_HAVE_EIGEN3
-#include "src/kernel/lmm/bmf.hpp"
-#endif
-#include "src/kernel/resource/profile/Event.hpp"
-#include "src/surf/sio_S22.hpp"
-
-#include <unordered_set>
-
-XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(res_host);
-XBT_LOG_EXTERNAL_CATEGORY(xbt_cfg);
-
-/***********
- * Options *
- ***********/
- static simgrid::config::Flag<std::string> cfg_sio_solver("host/sio_solver",
- "Set linear equations solver used by sio model",
- "fairbottleneck",
- &simgrid::kernel::lmm::System::validate_solver);
-
-/**************************************/
-/*** Resource Creation & Destruction **/
-/**************************************/
-void surf_host_model_init_sio_S22()
-{
- XBT_CINFO(xbt_cfg, "Switching to the S22 model to handle streaming I/Os.");
- xbt_assert(cfg_sio_solver != "maxmin", "Invalid configuration. Cannot use maxmin solver with streaming I/Os.");
-
- auto* system = simgrid::kernel::lmm::System::build(cfg_sio_solver.get(), true /* selective update */);
- auto host_model = std::make_shared<simgrid::kernel::resource::HostS22Model>("Host_Sio", system);
- auto* engine = simgrid::kernel::EngineImpl::get_instance();
- engine->add_model(host_model);
- engine->get_netzone_root()->set_host_model(host_model);
-}
-
-namespace simgrid::kernel::resource {
-
-HostS22Model::HostS22Model(const std::string& name, lmm::System* sys) : HostModel(name)
-{
- set_maxmin_system(sys);
-
- auto net_model = std::make_shared<NetworkS22Model>("Network_Sio", this, sys);
- auto engine = EngineImpl::get_instance();
- engine->add_model(net_model);
- engine->get_netzone_root()->set_network_model(net_model);
-
- auto disk_model = std::make_shared<DiskS22Model>("Disk_Sio", this, sys);
- engine->add_model(disk_model);
- engine->get_netzone_root()->set_disk_model(disk_model);
-
- surf_cpu_model_init_Cas01();
-}
-
-DiskS22Model::DiskS22Model(const std::string& name, HostS22Model* hmodel, lmm::System* sys)
- : DiskModel(name), hostModel_(hmodel)
-{
- set_maxmin_system(sys);
-}
-
-DiskS22Model::~DiskS22Model()
-{
- set_maxmin_system(nullptr);
-}
-
-NetworkS22Model::NetworkS22Model(const std::string& name, HostS22Model* hmodel, lmm::System* sys)
- : NetworkModel(name), hostModel_(hmodel)
-{
- set_maxmin_system(sys);
- loopback_.reset(create_link("__loopback__", {simgrid::config::get_value<double>("network/loopback-bw")}));
- loopback_->set_sharing_policy(s4u::Link::SharingPolicy::FATPIPE, {});
- loopback_->set_latency(simgrid::config::get_value<double>("network/loopback-lat"));
- loopback_->get_iface()->seal();
-}
-
-NetworkS22Model::~NetworkS22Model()
-{
- set_maxmin_system(nullptr);
-}
-
-double HostS22Model::next_occurring_event(double now)
-{
- double min = HostModel::next_occurring_event_full(now);
- for (Action const& action : *get_started_action_set()) {
- const auto& net_action = static_cast<const S22Action&>(action);
- if (net_action.get_latency() > 0 && (min < 0 || net_action.get_latency() < min)) {
- min = net_action.get_latency();
- XBT_DEBUG("Updating min with %p (start %f): %f", &net_action, net_action.get_start_time(), min);
- }
- }
- XBT_DEBUG("min value: %f", min);
-
- return min;
-}
-
-void HostS22Model::update_actions_state(double /*now*/, double delta)
-{
- for (auto it = std::begin(*get_started_action_set()); it != std::end(*get_started_action_set());) {
- auto& action = static_cast<S22Action&>(*it);
- ++it; // increment iterator here since the following calls to action.finish() may invalidate it
- if (action.get_latency() > 0) {
- if (action.get_latency() > delta) {
- action.update_latency(delta, sg_surf_precision);
- } else {
- action.set_latency(0.0);
- }
- if ((action.get_latency() <= 0.0) && (action.is_suspended() == 0)) {
- action.update_bound();
- get_maxmin_system()->update_variable_penalty(action.get_variable(), 1.0);
- action.set_last_update();
- }
- }
- XBT_DEBUG("Action (%p) : remains (%g) updated by %g.", &action, action.get_remains(), action.get_rate() * delta);
- action.update_remains(action.get_rate() * delta);
- action.update_max_duration(delta);
-
- XBT_DEBUG("Action (%p) : remains (%g).", &action, action.get_remains());
-
- /* In the next if cascade, the action can be finished either because:
- * - The amount of remaining work reached 0
- * - The max duration was reached
- * If it's not done, it may have failed.
- */
-
- if (((action.get_remains() <= 0) && (action.get_variable()->get_penalty() > 0)) ||
- ((action.get_max_duration() != NO_MAX_DURATION) && (action.get_max_duration() <= 0))) {
- action.finish(Action::State::FINISHED);
- continue;
- }
-
- /* Need to check that none of the model has failed */
- int i = 0;
- const lmm::Constraint* cnst = action.get_variable()->get_constraint(i);
- while (cnst != nullptr) {
- i++;
- if (not cnst->get_id()->is_on()) {
- XBT_DEBUG("Action (%p) Failed!!", &action);
- action.finish(Action::State::FAILED);
- break;
- }
- cnst = action.get_variable()->get_constraint(i);
- }
- }
-}
-
-S22Action::S22Action(Model* model, s4u::Host* src_host, DiskImpl* src_disk, s4u::Host* dst_host, DiskImpl* dst_disk, double size)
- : DiskAction(model, 1, false)
- , src_host_(src_host)
- , src_disk_(src_disk)
- , dst_host_(dst_host)
- , dst_disk_(dst_disk)
- , size_(size)
-{
- size_t disk_nb = 0;
- size_t link_nb = 0;
- double latency = 0.0;
- this->set_last_update();
-
- if (src_disk_ != nullptr)
- disk_nb++;
- if (dst_disk_ != nullptr)
- disk_nb++;
-
- if (size_ > 0) {
- std::unordered_set<const char*> affected_links;
- double lat = 0.0;
- std::vector<StandardLinkImpl*> route;
- src_host_->route_to(dst_host_, route, &lat);
- latency = std::max(latency, lat);
-
- for (auto const& link : route)
- affected_links.insert(link->get_cname());
-
- link_nb = affected_links.size();
- }
-
- XBT_DEBUG("Creating a stream io (%p) with %zu disk(s) and %zu unique link(s).", this, disk_nb, link_nb);
- latency_ = latency;
-
- set_variable(model->get_maxmin_system()->variable_new(this, 1.0, -1.0, disk_nb + link_nb));
-
- if (latency_ > 0)
- model->get_maxmin_system()->update_variable_penalty(get_variable(), 0.0);
-
- /* Expand it for the disks even if there is nothing to read/write, to make sure that it gets expended even if there is no
- * communication either */
- if (src_disk_ != nullptr)
- model->get_maxmin_system()->expand(src_disk_->get_constraint(), get_variable(), size, true);
- if (dst_disk_ != nullptr)
- model->get_maxmin_system()->expand(dst_disk_->get_constraint(), get_variable(), size, true);
-
- if (link_nb > 0) {
- std::vector<StandardLinkImpl*> route;
- src_host_->route_to(dst_host_, route, nullptr);
- for (auto const& link : route)
- model->get_maxmin_system()->expand(link->get_constraint(), this->get_variable(), size_);
- }
-
- if (link_nb + disk_nb == 0) {
- this->set_cost(1.0);
- this->set_remains(0.0);
- }
-
- /* finally calculate the initial bound value */
- update_bound();
-}
-
-DiskAction* HostS22Model::io_stream(s4u::Host* src_host, DiskImpl* src_disk, s4u::Host* dst_host, DiskImpl* dst_disk,
- double size)
-{
- return new S22Action(this, src_host, src_disk, dst_host, dst_disk, size);
-}
-
-Action* NetworkS22Model::communicate(s4u::Host* src, s4u::Host* dst, double size, double /*rate*/)
-{
- return hostModel_->io_stream(src, nullptr, dst, nullptr, size);
-}
-
-DiskImpl* DiskS22Model::create_disk(const std::string& name, double read_bandwidth, double write_bandwidth)
-{
- return (new DiskS22(name, read_bandwidth, write_bandwidth))->set_model(this);
-}
-
-StandardLinkImpl* NetworkS22Model::create_link(const std::string& name, const std::vector<double>& bandwidths)
-{
- xbt_assert(bandwidths.size() == 1, "Non WIFI link must have only 1 bandwidth.");
- auto link = new LinkS22(name, bandwidths[0], get_maxmin_system());
- link->set_model(this);
- return link;
-}
-
-StandardLinkImpl* NetworkS22Model::create_wifi_link(const std::string& name, const std::vector<double>& bandwidths)
-{
- THROW_UNIMPLEMENTED;
-}
-
-/************
- * Resource *
- ************/
-DiskAction* DiskS22::io_start(sg_size_t size, s4u::Io::OpType type)
-{
- DiskAction* res;
- switch (type) {
- case s4u::Io::OpType::READ:
- res = static_cast<DiskS22Model*>(get_model())->hostModel_->io_stream(get_host(), this, get_host(), nullptr, size);
- break;
- case s4u::Io::OpType::WRITE:
- res = static_cast<DiskS22Model*>(get_model())->hostModel_->io_stream(get_host(), nullptr, get_host(), this, size);
- break;
- default:
- THROW_UNIMPLEMENTED;
- }
-
- return res;
-}
-
-void DiskS22::apply_event(kernel::profile::Event* triggered, double value)
-{
- /* Find out which of my iterators was triggered, and react accordingly */
- if (triggered == get_read_event()) {
- set_read_bandwidth(value);
- unref_read_event();
- } else if (triggered == get_write_event()) {
- set_write_bandwidth(value);
- unref_write_event();
- } else if (triggered == get_state_event()) {
- if (value > 0)
- turn_on();
- else
- turn_off();
- unref_state_event();
- } else {
- xbt_die("Unknown event!\n");
- }
-}
-
-LinkS22::LinkS22(const std::string& name, double bandwidth, lmm::System* system) : StandardLinkImpl(name)
-{
- this->set_constraint(system->constraint_new(this, bandwidth));
- bandwidth_.peak = bandwidth;
-}
-
-void LinkS22::apply_event(profile::Event* triggered, double value)
-{
- XBT_DEBUG("Updating link %s (%p) with value=%f", get_cname(), this, value);
- if (triggered == bandwidth_.event) {
- set_bandwidth(value);
- tmgr_trace_event_unref(&bandwidth_.event);
-
- } else if (triggered == latency_.event) {
- set_latency(value);
- tmgr_trace_event_unref(&latency_.event);
-
- } else if (triggered == get_state_event()) {
- if (value > 0)
- turn_on();
- else
- turn_off();
- unref_state_event();
- } else {
- xbt_die("Unknown event ! \n");
- }
-}
-
-void LinkS22::set_bandwidth(double value)
-{
- bandwidth_.peak = value;
- StandardLinkImpl::on_bandwidth_change();
-
- get_model()->get_maxmin_system()->update_constraint_bound(get_constraint(), bandwidth_.peak * bandwidth_.scale);
-}
-
-void LinkS22::set_latency(double value)
-{
- latency_check(value);
- const lmm::Element* elem = nullptr;
-
- latency_.peak = value;
- while (const auto* var = get_constraint()->get_variable(&elem)) {
- const auto* action = static_cast<S22Action*>(var->get_id());
- action->update_bound();
- }
-}
-
-/**********
- * Action *
- **********/
-
-double S22Action::calculate_io_read_bound() const
-{
- double io_read_bound = std::numeric_limits<double>::max();
-
- if (src_disk_ == nullptr)
- return io_read_bound;
-
- if (size_ > 0)
- io_read_bound = std::min(io_read_bound, src_disk_->get_read_bandwidth() / size_);
-
- return io_read_bound;
-}
-
-double S22Action::calculate_io_write_bound() const
-{
- double io_write_bound = std::numeric_limits<double>::max();
-
- if (dst_disk_ == nullptr)
- return io_write_bound;
-
- if (size_ > 0)
- io_write_bound = std::min(io_write_bound, dst_disk_->get_write_bandwidth() / size_);
-
- return io_write_bound;
-}
-
-double S22Action::calculate_network_bound() const
-{
- double lat = 0.0;
- double lat_bound = std::numeric_limits<double>::max();
-
- if (src_host_ == dst_host_)
- return lat_bound;
-
- if (size_ <= 0){
- std::vector<StandardLinkImpl*> route;
- src_host_->route_to(dst_host_, route, &lat);
- }
-
- if (lat > 0)
- lat_bound = NetworkModel::cfg_tcp_gamma / (2.0 * lat);
-
- return lat_bound;
-}
-
-void S22Action::update_bound() const
-{
- double bound = std::min(std::min(calculate_io_read_bound(), calculate_io_write_bound()),
- calculate_network_bound());
-
- XBT_DEBUG("action (%p) : bound = %g", this, bound);
-
- /* latency has been paid (or no latency), we can set the appropriate bound for network limit */
- if ((bound < std::numeric_limits<double>::max()) && (latency_ <= 0.0))
- get_model()->get_maxmin_system()->update_variable_bound(get_variable(), bound);
- }
-
-} // namespace simgrid::kernel::resource
