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Avoid unnecessary copy of parameters for parallel_execute.
[simgrid.git] / src / surf / ptask_L07.cpp
index 36a7e0f..5b6be89 100644 (file)
@@ -1,4 +1,4 @@
-/* Copyright (c) 2007-2018. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2007-2019. 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. */
@@ -18,14 +18,13 @@ XBT_LOG_EXTERNAL_CATEGORY(xbt_cfg);
 void surf_host_model_init_ptask_L07()
 {
   XBT_CINFO(xbt_cfg,"Switching to the L07 model to handle parallel tasks.");
-  xbt_assert(not surf_cpu_model_pm, "CPU model type already defined");
-  xbt_assert(not surf_network_model, "network model type already defined");
+  xbt_assert(not surf_cpu_model_pm, "Cannot switch to ptasks: CPU model already defined");
+  xbt_assert(not surf_network_model, "Cannot switch to ptasks: network model already defined");
 
   surf_host_model = new simgrid::surf::HostL07Model();
-  all_existing_models->push_back(surf_host_model);
+  all_existing_models.push_back(surf_host_model);
 }
 
-
 namespace simgrid {
 namespace surf {
 
@@ -122,7 +121,7 @@ void HostL07Model::update_actions_state(double /*now*/, double delta)
       while (cnst != nullptr) {
         i++;
         void* constraint_id = cnst->get_id();
-        if (static_cast<simgrid::kernel::resource::Resource*>(constraint_id)->is_off()) {
+        if (not static_cast<simgrid::kernel::resource::Resource*>(constraint_id)->is_on()) {
           XBT_DEBUG("Action (%p) Failed!!", &action);
           action.finish(kernel::resource::Action::State::FAILED);
           break;
@@ -133,39 +132,43 @@ void HostL07Model::update_actions_state(double /*now*/, double delta)
   }
 }
 
-kernel::resource::Action* HostL07Model::execute_parallel(int host_nb, sg_host_t* host_list, double* flops_amount,
-                                                         double* bytes_amount, double rate)
+kernel::resource::Action* HostL07Model::execute_parallel(size_t host_nb, s4u::Host* const* host_list,
+                                                         const double* flops_amount, const double* bytes_amount,
+                                                         double rate)
 {
   return new L07Action(this, host_nb, host_list, flops_amount, bytes_amount, rate);
 }
 
-L07Action::L07Action(kernel::resource::Model* model, int host_nb, sg_host_t* host_list, double* flops_amount,
-                     double* bytes_amount, double rate)
+L07Action::L07Action(kernel::resource::Model* model, size_t host_nb, s4u::Host* const* host_list,
+                     const double* flops_amount, const double* bytes_amount, double rate)
     : CpuAction(model, 1, 0), computationAmount_(flops_amount), communicationAmount_(bytes_amount), rate_(rate)
 {
-  int nb_link = 0;
-  int nb_used_host = 0; /* Only the hosts with something to compute (>0 flops) are counted) */
+  size_t link_nb      = 0;
+  size_t used_host_nb = 0; /* Only the hosts with something to compute (>0 flops) are counted) */
   double latency = 0.0;
+  this->set_last_update();
 
-  this->hostList_->reserve(host_nb);
-  for (int i = 0; i < host_nb; i++) {
-    this->hostList_->push_back(host_list[i]);
-    if (flops_amount[i] > 0)
-      nb_used_host++;
-  }
+  this->hostList_.reserve(host_nb);
+  for (size_t i = 0; i < host_nb; i++)
+    this->hostList_.push_back(host_list[i]);
+
+  if (flops_amount != nullptr)
+    for (size_t i = 0; i < host_nb; i++)
+      if (flops_amount[i] > 0)
+        used_host_nb++;
 
   /* Compute the number of affected resources... */
   if(bytes_amount != nullptr) {
     std::unordered_set<const char*> affected_links;
 
-    for (int i = 0; i < host_nb; i++) {
-      for (int j = 0; j < host_nb; j++) {
+    for (size_t i = 0; i < host_nb; i++) {
+      for (size_t j = 0; j < host_nb; j++) {
 
         if (bytes_amount[i * host_nb + j] > 0) {
           double lat=0.0;
 
           std::vector<kernel::resource::LinkImpl*> route;
-          hostList_->at(i)->route_to(hostList_->at(j), route, &lat);
+          hostList_.at(i)->route_to(hostList_.at(j), route, &lat);
           latency = std::max(latency, lat);
 
           for (auto const& link : route)
@@ -174,26 +177,29 @@ L07Action::L07Action(kernel::resource::Model* model, int host_nb, sg_host_t* hos
       }
     }
 
-    nb_link = affected_links.size();
+    link_nb = affected_links.size();
   }
 
-  XBT_DEBUG("Creating a parallel task (%p) with %d hosts and %d unique links.", this, host_nb, nb_link);
+  XBT_DEBUG("Creating a parallel task (%p) with %zu hosts and %zu unique links.", this, host_nb, link_nb);
   latency_ = latency;
 
-  set_variable(model->get_maxmin_system()->variable_new(this, 1.0, (rate > 0 ? rate : -1.0), host_nb + nb_link));
+  set_variable(model->get_maxmin_system()->variable_new(this, 1.0, (rate > 0 ? rate : -1.0), host_nb + link_nb));
 
   if (latency_ > 0)
     model->get_maxmin_system()->update_variable_weight(get_variable(), 0.0);
 
-  for (int i = 0; i < host_nb; i++)
-    model->get_maxmin_system()->expand(host_list[i]->pimpl_cpu->get_constraint(), get_variable(), flops_amount[i]);
+  /* Expend it for the CPUs even if there is nothing to compute, to make sure that it gets expended even if there is no
+   * communication either */
+  for (size_t i = 0; i < host_nb; i++)
+    model->get_maxmin_system()->expand(host_list[i]->pimpl_cpu->get_constraint(), get_variable(),
+                                       (flops_amount == nullptr ? 0.0 : flops_amount[i]));
 
-  if(bytes_amount != nullptr) {
-    for (int i = 0; i < host_nb; i++) {
-      for (int j = 0; j < host_nb; j++) {
+  if (bytes_amount != nullptr) {
+    for (size_t i = 0; i < host_nb; i++) {
+      for (size_t j = 0; j < host_nb; j++) {
         if (bytes_amount[i * host_nb + j] > 0.0) {
           std::vector<kernel::resource::LinkImpl*> route;
-          hostList_->at(i)->route_to(hostList_->at(j), route, nullptr);
+          hostList_.at(i)->route_to(hostList_.at(j), route, nullptr);
 
           for (auto const& link : route)
             model->get_maxmin_system()->expand_add(link->get_constraint(), this->get_variable(),
@@ -203,11 +209,10 @@ L07Action::L07Action(kernel::resource::Model* model, int host_nb, sg_host_t* hos
     }
   }
 
-  if (nb_link + nb_used_host == 0) {
+  if (link_nb + used_host_nb == 0) {
     this->set_cost(1.0);
     this->set_remains(0.0);
   }
-  delete[] host_list;
 }
 
 kernel::resource::Action* NetworkL07Model::communicate(s4u::Host* src, s4u::Host* dst, double size, double rate)
@@ -220,7 +225,9 @@ kernel::resource::Action* NetworkL07Model::communicate(s4u::Host* src, s4u::Host
   host_list[1]    = dst;
   bytes_amount[1] = size;
 
-  return hostModel_->execute_parallel(2, host_list, flops_amount, bytes_amount, rate);
+  kernel::resource::Action* res = hostModel_->execute_parallel(2, host_list, flops_amount, bytes_amount, rate);
+  static_cast<L07Action*>(res)->free_arrays_ = true;
+  return res;
 }
 
 Cpu* CpuL07Model::create_cpu(simgrid::s4u::Host* host, std::vector<double>* speed_per_pstate, int core)
@@ -261,13 +268,15 @@ LinkL07::LinkL07(NetworkL07Model* model, const std::string& name, double bandwid
 
 kernel::resource::Action* CpuL07::execution_start(double size)
 {
-  sg_host_t* host_list = new sg_host_t[1]();
-  double* flops_amount = new double[1]();
+  sg_host_t host_list[1] = {get_host()};
 
-  host_list[0]    = get_host();
+  double* flops_amount = new double[1]();
   flops_amount[0] = size;
 
-  return static_cast<CpuL07Model*>(get_model())->hostModel_->execute_parallel(1, host_list, flops_amount, nullptr, -1);
+  kernel::resource::Action* res =
+      static_cast<CpuL07Model*>(get_model())->hostModel_->execute_parallel(1, host_list, flops_amount, nullptr, -1);
+  static_cast<L07Action*>(res)->free_arrays_ = true;
+  return res;
 }
 
 kernel::resource::Action* CpuL07::sleep(double duration)
@@ -306,7 +315,7 @@ bool LinkL07::is_used()
   return get_model()->get_maxmin_system()->constraint_used(get_constraint());
 }
 
-void CpuL07::apply_event(tmgr_trace_event_t triggered, double value)
+void CpuL07::apply_event(kernel::profile::Event* triggered, double value)
 {
   XBT_DEBUG("Updating cpu %s (%p) with value %g", get_cname(), this, value);
   if (triggered == speed_.event) {
@@ -315,10 +324,13 @@ void CpuL07::apply_event(tmgr_trace_event_t triggered, double value)
     tmgr_trace_event_unref(&speed_.event);
 
   } else if (triggered == state_event_) {
-    if (value > 0)
-      turn_on();
-    else
-      turn_off();
+    if (value > 0) {
+      if (not is_on()) {
+        XBT_VERB("Restart processes on host %s", get_host()->get_cname());
+        get_host()->turn_on();
+      }
+    } else
+      get_host()->turn_off();
     tmgr_trace_event_unref(&state_event_);
 
   } else {
@@ -326,7 +338,7 @@ void CpuL07::apply_event(tmgr_trace_event_t triggered, double value)
   }
 }
 
-void LinkL07::apply_event(tmgr_trace_event_t triggered, double value)
+void LinkL07::apply_event(kernel::profile::Event* triggered, double value)
 {
   XBT_DEBUG("Updating link %s (%p) with value=%f", get_cname(), this, value);
   if (triggered == bandwidth_.event) {
@@ -375,28 +387,30 @@ LinkL07::~LinkL07() = default;
  * Action *
  **********/
 
-L07Action::~L07Action(){
-  delete hostList_;
-  delete[] communicationAmount_;
-  delete[] computationAmount_;
+L07Action::~L07Action()
+{
+  if (free_arrays_) {
+    delete[] computationAmount_;
+    delete[] communicationAmount_;
+  }
 }
 
 void L07Action::updateBound()
 {
   double lat_current = 0.0;
 
-  int hostNb = hostList_->size();
+  size_t host_count = hostList_.size();
 
   if (communicationAmount_ != nullptr) {
-    for (int i = 0; i < hostNb; i++) {
-      for (int j = 0; j < hostNb; j++) {
+    for (size_t i = 0; i < host_count; i++) {
+      for (size_t j = 0; j < host_count; j++) {
 
-        if (communicationAmount_[i * hostNb + j] > 0) {
+        if (communicationAmount_[i * host_count + j] > 0) {
           double lat = 0.0;
           std::vector<kernel::resource::LinkImpl*> route;
-          hostList_->at(i)->route_to(hostList_->at(j), route, &lat);
+          hostList_.at(i)->route_to(hostList_.at(j), route, &lat);
 
-          lat_current = std::max(lat_current, lat * communicationAmount_[i * hostNb + j]);
+          lat_current = std::max(lat_current, lat * communicationAmount_[i * host_count + j]);
         }
       }
     }