1 /* Copyright (c) 2007-2010, 2013-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
11 #include "ptask_L07.hpp"
13 #include "cpu_interface.hpp"
14 #include "surf_routing.hpp"
17 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_host);
18 XBT_LOG_EXTERNAL_CATEGORY(xbt_cfg);
20 /**************************************/
21 /*** Resource Creation & Destruction **/
22 /**************************************/
23 void surf_host_model_init_ptask_L07()
25 XBT_CINFO(xbt_cfg,"Switching to the L07 model to handle parallel tasks.");
26 xbt_assert(!surf_cpu_model_pm, "CPU model type already defined");
27 xbt_assert(!surf_network_model, "network model type already defined");
29 surf_host_model = new simgrid::surf::HostL07Model();
30 all_existing_models->push_back(surf_host_model);
37 HostL07Model::HostL07Model() : HostModel() {
38 maxminSystem_ = lmm_system_new(true /* lazy */);
39 maxminSystem_->solve_fun = &bottleneck_solve;
40 surf_network_model = new NetworkL07Model(this,maxminSystem_);
41 surf_cpu_model_pm = new CpuL07Model(this,maxminSystem_);
43 routing_model_create(surf_network_model->createLink("__loopback__", 498000000, 0.000015, SURF_LINK_FATPIPE, nullptr));
46 HostL07Model::~HostL07Model() {
47 delete surf_cpu_model_pm;
48 delete surf_network_model;
51 CpuL07Model::CpuL07Model(HostL07Model *hmodel,lmm_system_t sys)
57 CpuL07Model::~CpuL07Model() {
58 surf_cpu_model_pm = nullptr;
59 lmm_system_free(maxminSystem_);
60 maxminSystem_ = nullptr;
62 NetworkL07Model::NetworkL07Model(HostL07Model *hmodel, lmm_system_t sys)
68 NetworkL07Model::~NetworkL07Model()
70 surf_network_model = nullptr;
71 maxminSystem_ = nullptr; // Avoid multi-free
75 double HostL07Model::nextOccuringEvent(double now)
77 double min = HostModel::nextOccuringEventFull(now);
78 for (auto it(getRunningActionSet()->begin()), itend(getRunningActionSet()->end()); it != itend ; ++it) {
79 L07Action *action = static_cast<L07Action*>(&*it);
80 if (action->latency_ > 0 && (min < 0 || action->latency_ < min)) {
81 min = action->latency_;
82 XBT_DEBUG("Updating min with %p (start %f): %f", action, action->getStartTime(), min);
85 XBT_DEBUG("min value: %f", min);
90 void HostL07Model::updateActionsState(double /*now*/, double delta) {
93 ActionList *actionSet = getRunningActionSet();
95 for(ActionList::iterator it = actionSet->begin(), itNext = it
96 ; it != actionSet->end()
99 action = static_cast<L07Action*>(&*it);
100 if (action->latency_ > 0) {
101 if (action->latency_ > delta) {
102 double_update(&(action->latency_), delta, sg_surf_precision);
104 action->latency_ = 0.0;
106 if ((action->latency_ == 0.0) && (action->isSuspended() == 0)) {
107 action->updateBound();
108 lmm_update_variable_weight(maxminSystem_, action->getVariable(), 1.0);
111 XBT_DEBUG("Action (%p) : remains (%g) updated by %g.",
112 action, action->getRemains(), lmm_variable_getvalue(action->getVariable()) * delta);
113 action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
115 if (action->getMaxDuration() != NO_MAX_DURATION)
116 action->updateMaxDuration(delta);
118 XBT_DEBUG("Action (%p) : remains (%g).", action, action->getRemains());
120 /* In the next if cascade, the action can be finished either because:
121 * - The amount of remaining work reached 0
122 * - The max duration was reached
123 * If it's not done, it may have failed.
126 if ((action->getRemains() <= 0) &&
127 (lmm_get_variable_weight(action->getVariable()) > 0)) {
129 action->setState(Action::State::done);
130 } else if ((action->getMaxDuration() != NO_MAX_DURATION) &&
131 (action->getMaxDuration() <= 0)) {
133 action->setState(Action::State::done);
135 /* Need to check that none of the model has failed */
136 lmm_constraint_t cnst = nullptr;
139 while ((cnst = lmm_get_cnst_from_var(maxminSystem_, action->getVariable(), i++))) {
140 void *constraint_id = lmm_constraint_id(cnst);
141 if (static_cast<simgrid::surf::Resource*>(constraint_id)->isOff()) {
142 XBT_DEBUG("Action (%p) Failed!!", action);
144 action->setState(Action::State::failed);
153 Action *HostL07Model::executeParallelTask(int host_nb, sg_host_t *host_list,
154 double *flops_amount, double *bytes_amount,double rate) {
155 return new L07Action(this, host_nb, host_list, flops_amount, bytes_amount, rate);
159 L07Action::L07Action(Model *model, int host_nb, sg_host_t *host_list,
160 double *flops_amount, double *bytes_amount, double rate)
161 : CpuAction(model, 1, 0)
164 int nb_used_host = 0; /* Only the hosts with something to compute (>0 flops) are counted) */
165 double latency = 0.0;
167 this->netcardList_->reserve(host_nb);
168 for (int i = 0; i<host_nb; i++)
169 this->netcardList_->push_back(host_list[i]->pimpl_netcard);
171 /* Compute the number of affected resources... */
172 if(bytes_amount != nullptr) {
173 xbt_dict_t ptask_parallel_task_link_set = xbt_dict_new_homogeneous(nullptr);
175 for (int i = 0; i < host_nb; i++) {
176 for (int j = 0; j < host_nb; j++) {
178 if (bytes_amount[i * host_nb + j] > 0) {
180 std::vector<Link*> *route = new std::vector<Link*>();
182 routing_platf->getRouteAndLatency((*netcardList_)[i], (*netcardList_)[j], route, &lat);
183 latency = MAX(latency, lat);
185 for (auto link : *route)
186 xbt_dict_set(ptask_parallel_task_link_set, link->getName(), link, nullptr);
192 nb_link = xbt_dict_length(ptask_parallel_task_link_set);
193 xbt_dict_free(&ptask_parallel_task_link_set);
196 for (int i = 0; i < host_nb; i++)
197 if (flops_amount[i] > 0)
200 XBT_DEBUG("Creating a parallel task (%p) with %d hosts and %d unique links.", this, host_nb, nb_link);
201 this->computationAmount_ = flops_amount;
202 this->communicationAmount_ = bytes_amount;
203 this->latency_ = latency;
206 this->variable_ = lmm_variable_new(model->getMaxminSystem(), this, 1.0,
207 (rate > 0 ? rate : -1.0),
210 if (this->latency_ > 0)
211 lmm_update_variable_weight(model->getMaxminSystem(), this->getVariable(), 0.0);
213 for (int i = 0; i < host_nb; i++)
214 lmm_expand(model->getMaxminSystem(), host_list[i]->pimpl_cpu->getConstraint(),
215 this->getVariable(), flops_amount[i]);
217 if(bytes_amount != nullptr) {
218 for (int i = 0; i < host_nb; i++) {
219 for (int j = 0; j < host_nb; j++) {
221 if (bytes_amount[i * host_nb + j] == 0.0)
223 std::vector<Link*> *route = new std::vector<Link*>();
225 routing_platf->getRouteAndLatency((*netcardList_)[i], (*netcardList_)[j], route, nullptr);
227 for (auto link : *route)
228 lmm_expand_add(model->getMaxminSystem(), link->getConstraint(), this->getVariable(), bytes_amount[i * host_nb + j]);
235 if (nb_link + nb_used_host == 0) {
237 this->setRemains(0.0);
242 Action* NetworkL07Model::communicate(s4u::Host* src, s4u::Host* dst, double size, double rate)
244 sg_host_t*host_list = xbt_new0(sg_host_t, 2);
245 double *flops_amount = xbt_new0(double, 2);
246 double *bytes_amount = xbt_new0(double, 4);
250 bytes_amount[1] = size;
252 return hostModel_->executeParallelTask(2, host_list, flops_amount, bytes_amount, rate);
255 Cpu *CpuL07Model::createCpu(simgrid::s4u::Host *host, std::vector<double> *speedPerPstate, int core)
257 return new CpuL07(this, host, speedPerPstate, core);
260 Link* NetworkL07Model::createLink(const char *name, double bandwidth, double latency,
261 e_surf_link_sharing_policy_t policy, xbt_dict_t properties)
263 return new LinkL07(this, name, properties, bandwidth, latency, policy);
270 CpuL07::CpuL07(CpuL07Model *model, simgrid::s4u::Host *host, std::vector<double> *speedPerPstate, int core)
271 : Cpu(model, host, speedPerPstate, core)
273 constraint_ = lmm_constraint_new(model->getMaxminSystem(), this, speedPerPstate->front());
276 CpuL07::~CpuL07()=default;
278 LinkL07::LinkL07(NetworkL07Model *model, const char* name, xbt_dict_t props, double bandwidth, double latency,
279 e_surf_link_sharing_policy_t policy)
280 : Link(model, name, props, lmm_constraint_new(model->getMaxminSystem(), this, bandwidth))
282 bandwidth_.peak = bandwidth;
283 latency_.peak = latency;
285 if (policy == SURF_LINK_FATPIPE)
286 lmm_constraint_shared(getConstraint());
288 Link::onCreation(this);
291 Action *CpuL07::execution_start(double size)
293 sg_host_t*host_list = xbt_new0(sg_host_t, 1);
294 double *flops_amount = xbt_new0(double, 1);
296 host_list[0] = getHost();
297 flops_amount[0] = size;
299 return static_cast<CpuL07Model*>(getModel())->hostModel_->executeParallelTask(1, host_list, flops_amount, nullptr, -1);
302 Action *CpuL07::sleep(double duration)
304 L07Action *action = static_cast<L07Action*>(execution_start(1.0));
305 action->maxDuration_ = duration;
306 action->suspended_ = 2;
307 lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), 0.0);
312 bool CpuL07::isUsed(){
313 return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
316 /** @brief take into account changes of speed (either load or max) */
317 void CpuL07::onSpeedChange() {
318 lmm_variable_t var = nullptr;
319 lmm_element_t elem = nullptr;
321 lmm_update_constraint_bound(getModel()->getMaxminSystem(), getConstraint(), speed_.peak * speed_.scale);
322 while ((var = lmm_get_var_from_cnst (getModel()->getMaxminSystem(), getConstraint(), &elem))) {
323 Action *action = static_cast<Action*>(lmm_variable_id(var));
325 lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(), speed_.scale * speed_.peak);
328 Cpu::onSpeedChange();
332 bool LinkL07::isUsed(){
333 return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
336 void CpuL07::apply_event(tmgr_trace_iterator_t triggered, double value){
337 XBT_DEBUG("Updating cpu %s (%p) with value %g", getName(), this, value);
338 if (triggered == speed_.event) {
339 speed_.scale = value;
341 tmgr_trace_event_unref(&speed_.event);
343 } else if (triggered == stateEvent_) {
348 tmgr_trace_event_unref(&stateEvent_);
351 xbt_die("Unknown event!\n");
355 void LinkL07::apply_event(tmgr_trace_iterator_t triggered, double value) {
356 XBT_DEBUG("Updating link %s (%p) with value=%f", getName(), this, value);
357 if (triggered == bandwidth_.event) {
359 tmgr_trace_event_unref(&bandwidth_.event);
361 } else if (triggered == latency_.event) {
363 tmgr_trace_event_unref(&latency_.event);
365 } else if (triggered == stateEvent_) {
370 tmgr_trace_event_unref(&stateEvent_);
373 xbt_die("Unknown event ! \n");
377 void LinkL07::setBandwidth(double value)
379 bandwidth_.peak = value;
380 lmm_update_constraint_bound(getModel()->getMaxminSystem(), getConstraint(), bandwidth_.peak * bandwidth_.scale);
383 void LinkL07::setLatency(double value)
385 lmm_variable_t var = nullptr;
387 lmm_element_t elem = nullptr;
389 latency_.peak = value;
390 while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), getConstraint(), &elem))) {
391 action = static_cast<L07Action*>(lmm_variable_id(var));
392 action->updateBound();
400 L07Action::~L07Action(){
402 free(communicationAmount_);
403 free(computationAmount_);
406 void L07Action::updateBound()
408 double lat_current = 0.0;
409 double lat_bound = -1.0;
412 int hostNb = netcardList_->size();
414 if (communicationAmount_ != nullptr) {
415 for (i = 0; i < hostNb; i++) {
416 for (j = 0; j < hostNb; j++) {
418 if (communicationAmount_[i * hostNb + j] > 0) {
420 std::vector<Link*> *route = new std::vector<Link*>();
421 routing_platf->getRouteAndLatency((*netcardList_)[i], (*netcardList_)[j], route, &lat);
423 lat_current = MAX(lat_current, lat * communicationAmount_[i * hostNb + j]);
429 lat_bound = sg_tcp_gamma / (2.0 * lat_current);
430 XBT_DEBUG("action (%p) : lat_bound = %g", this, lat_bound);
431 if ((latency_ == 0.0) && (suspended_ == 0)) {
433 lmm_update_variable_bound(getModel()->getMaxminSystem(), getVariable(), lat_bound);
435 lmm_update_variable_bound(getModel()->getMaxminSystem(), getVariable(), std::min(rate_, lat_bound));
439 int L07Action::unref()
443 if (action_hook.is_linked())
444 stateSet_->erase(stateSet_->iterator_to(*this));
446 lmm_variable_free(getModel()->getMaxminSystem(), getVariable());