***********/
static simgrid::config::Flag<std::string> cfg_sio_solver("host/sio_solver",
"Set linear equations solver used by sio model",
- "fairbottleneck",
+ "maxmin",
&simgrid::kernel::lmm::System::validate_solver);
/**************************************/
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.");
-
+ simgrid::config::set_default<bool>("network/crosstraffic", true);
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();
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_network_model_init_LegrandVelho();
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);
+ surf_disk_model_init_S19();
}
double HostS22Model::next_occurring_event(double now)
}
}
+
+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, 1, false)
+ : DiskAction(model, size, 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();
+ 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) */
- double lat = 0.0;
std::vector<StandardLinkImpl*> route;
- src_host_->route_to(dst_host_, route, &lat);
- latency = std::max(latency, lat);
- link_nb = route.size();
+ 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);
- latency_ = latency;
- set_variable(model->get_maxmin_system()->variable_new(this, 1.0, -1.0, disk_nb + link_nb));
+ set_variable(model->get_maxmin_system()->variable_new(this, 1.0, -1.0, 3 * 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 (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 (link_nb + disk_nb == 0) {
+ if (size <= 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
