+++ /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"
-#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",
- "maxmin",
- &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.");
- simgrid::config::set_default<bool>("network/crosstraffic", true);
- auto host_model = std::make_shared<simgrid::kernel::resource::HostS22Model>("Host_Sio");
- surf_network_model_init_LegrandVelho();
- surf_cpu_model_init_Cas01();
- surf_disk_model_init_S19();
-
- 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) : HostModel(name)
-{
- set_maxmin_system(lmm::System::build(cfg_sio_solver.get(), true /* selective update */));
-}
-
-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());
-
- 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;
- }
- }
-}
-
-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* HostS22Model::execute_thread(const s4u::Host* host, double flops_amount, int thread_count)
-{
- /* Create a single action whose cost is thread_count * flops_amount and that requests thread_count cores. */
- return host->get_cpu()->execution_start(thread_count * flops_amount, thread_count, -1);
-}
-
-/**********
- * Action *
- **********/
-void S22Action::update_bound() const
-{
- double bound = std::numeric_limits<double>::max();
- if (src_disk_)
- bound = std::min(bound, src_disk_->get_read_bandwidth());
- if (dst_disk_)
- bound = std::min(bound, dst_disk_->get_write_bandwidth());
- if (src_host_ != dst_host_) {
- double lat = 0.0;
- std::vector<StandardLinkImpl*> route;
- src_host_->route_to(dst_host_, route, &lat);
- if (lat > 0)
- bound = std::min(bound,NetworkModel::cfg_tcp_gamma / (2.0 * lat));
- }
-
- 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);
- }
-
-S22Action::S22Action(Model* model, s4u::Host* src_host, DiskImpl* src_disk, s4u::Host* dst_host, DiskImpl* dst_disk, double size)
- : DiskAction(model, size, false)
- , src_host_(src_host)
- , src_disk_(src_disk)
- , dst_host_(dst_host)
- , dst_disk_(dst_disk)
- , size_(size)
-{
- this->set_last_update();
-
- size_t disk_nb = 0;
- if (src_disk_ != nullptr)
- disk_nb++;
- if (dst_disk_ != nullptr)
- disk_nb++;
-
- /* there should always be a route between src_host and dst_host (loopback_ for self communication at least) */
- std::vector<StandardLinkImpl*> route;
- src_host_->route_to(dst_host_, route, &latency_);
- size_t link_nb = route.size();
-
- XBT_DEBUG("Creating a stream io (%p) with %zu disk(s) and %zu unique link(s).", this, disk_nb, link_nb);
-
- set_variable(model->get_maxmin_system()->variable_new(this, 1.0, -1.0, 2 * 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(), 1);
- model->get_maxmin_system()->expand(src_disk->get_read_constraint(), get_variable(), 1);
- }
- if (dst_disk_ != nullptr){
- model->get_maxmin_system()->expand(dst_disk_->get_constraint(), get_variable(), 1);
- model->get_maxmin_system()->expand(dst_disk_->get_write_constraint(), get_variable(), 1);
- }
-
- for (auto const& link : route)
- model->get_maxmin_system()->expand(link->get_constraint(), get_variable(), 1);
-
- if (size <= 0) {
- this->set_cost(1.0);
- this->set_remains(0.0);
- }
-
- /* finally calculate the initial bound value */
- update_bound();
-}
-} // namespace simgrid::kernel::resource
