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() = default;
48 CpuL07Model::CpuL07Model(HostL07Model *hmodel,lmm_system_t sys)
54 CpuL07Model::~CpuL07Model() {
55 lmm_system_free(maxminSystem_);
56 maxminSystem_ = nullptr;
58 NetworkL07Model::NetworkL07Model(HostL07Model *hmodel, lmm_system_t sys)
64 NetworkL07Model::~NetworkL07Model()
66 maxminSystem_ = nullptr; // Avoid multi-free
70 double HostL07Model::nextOccuringEvent(double now)
72 double min = HostModel::nextOccuringEventFull(now);
73 for (auto it(getRunningActionSet()->begin()), itend(getRunningActionSet()->end()); it != itend ; ++it) {
74 L07Action *action = static_cast<L07Action*>(&*it);
75 if (action->latency_ > 0 && (min < 0 || action->latency_ < min)) {
76 min = action->latency_;
77 XBT_DEBUG("Updating min with %p (start %f): %f", action, action->getStartTime(), min);
80 XBT_DEBUG("min value: %f", min);
85 void HostL07Model::updateActionsState(double /*now*/, double delta) {
88 ActionList *actionSet = getRunningActionSet();
90 for(ActionList::iterator it = actionSet->begin(), itNext = it
91 ; it != actionSet->end()
94 action = static_cast<L07Action*>(&*it);
95 if (action->latency_ > 0) {
96 if (action->latency_ > delta) {
97 double_update(&(action->latency_), delta, sg_surf_precision);
99 action->latency_ = 0.0;
101 if ((action->latency_ == 0.0) && (action->isSuspended() == 0)) {
102 action->updateBound();
103 lmm_update_variable_weight(maxminSystem_, action->getVariable(), 1.0);
106 XBT_DEBUG("Action (%p) : remains (%g) updated by %g.",
107 action, action->getRemains(), lmm_variable_getvalue(action->getVariable()) * delta);
108 action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
110 if (action->getMaxDuration() != NO_MAX_DURATION)
111 action->updateMaxDuration(delta);
113 XBT_DEBUG("Action (%p) : remains (%g).", action, action->getRemains());
115 /* In the next if cascade, the action can be finished either because:
116 * - The amount of remaining work reached 0
117 * - The max duration was reached
118 * If it's not done, it may have failed.
121 if ((action->getRemains() <= 0) &&
122 (lmm_get_variable_weight(action->getVariable()) > 0)) {
124 action->setState(Action::State::done);
125 } else if ((action->getMaxDuration() != NO_MAX_DURATION) &&
126 (action->getMaxDuration() <= 0)) {
128 action->setState(Action::State::done);
130 /* Need to check that none of the model has failed */
131 lmm_constraint_t cnst = nullptr;
134 while ((cnst = lmm_get_cnst_from_var(maxminSystem_, action->getVariable(), i++))) {
135 void *constraint_id = lmm_constraint_id(cnst);
136 if (static_cast<simgrid::surf::Resource*>(constraint_id)->isOff()) {
137 XBT_DEBUG("Action (%p) Failed!!", action);
139 action->setState(Action::State::failed);
148 Action *HostL07Model::executeParallelTask(int host_nb, sg_host_t *host_list,
149 double *flops_amount, double *bytes_amount,double rate) {
150 return new L07Action(this, host_nb, host_list, flops_amount, bytes_amount, rate);
154 L07Action::L07Action(Model *model, int host_nb, sg_host_t *host_list,
155 double *flops_amount, double *bytes_amount, double rate)
156 : CpuAction(model, 1, 0)
159 int nb_used_host = 0; /* Only the hosts with something to compute (>0 flops) are counted) */
160 double latency = 0.0;
162 this->netcardList_->reserve(host_nb);
163 for (int i = 0; i<host_nb; i++)
164 this->netcardList_->push_back(host_list[i]->pimpl_netcard);
166 /* Compute the number of affected resources... */
167 if(bytes_amount != nullptr) {
168 xbt_dict_t ptask_parallel_task_link_set = xbt_dict_new_homogeneous(nullptr);
170 for (int i = 0; i < host_nb; i++) {
171 for (int j = 0; j < host_nb; j++) {
173 if (bytes_amount[i * host_nb + j] > 0) {
175 std::vector<Link*> *route = new std::vector<Link*>();
177 routing_platf->getRouteAndLatency((*netcardList_)[i], (*netcardList_)[j], route, &lat);
178 latency = MAX(latency, lat);
180 for (auto link : *route)
181 xbt_dict_set(ptask_parallel_task_link_set, link->getName(), link, nullptr);
187 nb_link = xbt_dict_length(ptask_parallel_task_link_set);
188 xbt_dict_free(&ptask_parallel_task_link_set);
191 for (int i = 0; i < host_nb; i++)
192 if (flops_amount[i] > 0)
195 XBT_DEBUG("Creating a parallel task (%p) with %d hosts and %d unique links.", this, host_nb, nb_link);
196 this->computationAmount_ = flops_amount;
197 this->communicationAmount_ = bytes_amount;
198 this->latency_ = latency;
201 this->variable_ = lmm_variable_new(model->getMaxminSystem(), this, 1.0,
202 (rate > 0 ? rate : -1.0),
205 if (this->latency_ > 0)
206 lmm_update_variable_weight(model->getMaxminSystem(), this->getVariable(), 0.0);
208 for (int i = 0; i < host_nb; i++)
209 lmm_expand(model->getMaxminSystem(), host_list[i]->pimpl_cpu->getConstraint(),
210 this->getVariable(), flops_amount[i]);
212 if(bytes_amount != nullptr) {
213 for (int i = 0; i < host_nb; i++) {
214 for (int j = 0; j < host_nb; j++) {
216 if (bytes_amount[i * host_nb + j] == 0.0)
218 std::vector<Link*> *route = new std::vector<Link*>();
220 routing_platf->getRouteAndLatency((*netcardList_)[i], (*netcardList_)[j], route, nullptr);
222 for (auto link : *route)
223 lmm_expand_add(model->getMaxminSystem(), link->getConstraint(), this->getVariable(), bytes_amount[i * host_nb + j]);
230 if (nb_link + nb_used_host == 0) {
232 this->setRemains(0.0);
237 Action* NetworkL07Model::communicate(s4u::Host* src, s4u::Host* dst, double size, double rate)
239 sg_host_t*host_list = xbt_new0(sg_host_t, 2);
240 double *flops_amount = xbt_new0(double, 2);
241 double *bytes_amount = xbt_new0(double, 4);
245 bytes_amount[1] = size;
247 return hostModel_->executeParallelTask(2, host_list, flops_amount, bytes_amount, rate);
250 Cpu *CpuL07Model::createCpu(simgrid::s4u::Host *host, std::vector<double> *speedPerPstate, int core)
252 return new CpuL07(this, host, speedPerPstate, core);
255 Link* NetworkL07Model::createLink(const char *name, double bandwidth, double latency,
256 e_surf_link_sharing_policy_t policy, xbt_dict_t properties)
258 return new LinkL07(this, name, properties, bandwidth, latency, policy);
265 CpuL07::CpuL07(CpuL07Model *model, simgrid::s4u::Host *host, std::vector<double> *speedPerPstate, int core)
266 : Cpu(model, host, speedPerPstate, core)
268 constraint_ = lmm_constraint_new(model->getMaxminSystem(), this, speedPerPstate->front());
271 CpuL07::~CpuL07()=default;
273 LinkL07::LinkL07(NetworkL07Model *model, const char* name, xbt_dict_t props, double bandwidth, double latency,
274 e_surf_link_sharing_policy_t policy)
275 : Link(model, name, props, lmm_constraint_new(model->getMaxminSystem(), this, bandwidth))
277 bandwidth_.peak = bandwidth;
278 latency_.peak = latency;
280 if (policy == SURF_LINK_FATPIPE)
281 lmm_constraint_shared(getConstraint());
283 Link::onCreation(this);
286 Action *CpuL07::execution_start(double size)
288 sg_host_t*host_list = xbt_new0(sg_host_t, 1);
289 double *flops_amount = xbt_new0(double, 1);
291 host_list[0] = getHost();
292 flops_amount[0] = size;
294 return static_cast<CpuL07Model*>(getModel())->hostModel_->executeParallelTask(1, host_list, flops_amount, nullptr, -1);
297 Action *CpuL07::sleep(double duration)
299 L07Action *action = static_cast<L07Action*>(execution_start(1.0));
300 action->maxDuration_ = duration;
301 action->suspended_ = 2;
302 lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), 0.0);
307 bool CpuL07::isUsed(){
308 return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
311 /** @brief take into account changes of speed (either load or max) */
312 void CpuL07::onSpeedChange() {
313 lmm_variable_t var = nullptr;
314 lmm_element_t elem = nullptr;
316 lmm_update_constraint_bound(getModel()->getMaxminSystem(), getConstraint(), speed_.peak * speed_.scale);
317 while ((var = lmm_get_var_from_cnst (getModel()->getMaxminSystem(), getConstraint(), &elem))) {
318 Action *action = static_cast<Action*>(lmm_variable_id(var));
320 lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(), speed_.scale * speed_.peak);
323 Cpu::onSpeedChange();
327 bool LinkL07::isUsed(){
328 return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
331 void CpuL07::apply_event(tmgr_trace_iterator_t triggered, double value){
332 XBT_DEBUG("Updating cpu %s (%p) with value %g", getName(), this, value);
333 if (triggered == speed_.event) {
334 speed_.scale = value;
336 tmgr_trace_event_unref(&speed_.event);
338 } else if (triggered == stateEvent_) {
343 tmgr_trace_event_unref(&stateEvent_);
346 xbt_die("Unknown event!\n");
350 void LinkL07::apply_event(tmgr_trace_iterator_t triggered, double value) {
351 XBT_DEBUG("Updating link %s (%p) with value=%f", getName(), this, value);
352 if (triggered == bandwidth_.event) {
354 tmgr_trace_event_unref(&bandwidth_.event);
356 } else if (triggered == latency_.event) {
358 tmgr_trace_event_unref(&latency_.event);
360 } else if (triggered == stateEvent_) {
365 tmgr_trace_event_unref(&stateEvent_);
368 xbt_die("Unknown event ! \n");
372 void LinkL07::setBandwidth(double value)
374 bandwidth_.peak = value;
375 lmm_update_constraint_bound(getModel()->getMaxminSystem(), getConstraint(), bandwidth_.peak * bandwidth_.scale);
378 void LinkL07::setLatency(double value)
380 lmm_variable_t var = nullptr;
382 lmm_element_t elem = nullptr;
384 latency_.peak = value;
385 while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), getConstraint(), &elem))) {
386 action = static_cast<L07Action*>(lmm_variable_id(var));
387 action->updateBound();
395 L07Action::~L07Action(){
397 free(communicationAmount_);
398 free(computationAmount_);
401 void L07Action::updateBound()
403 double lat_current = 0.0;
404 double lat_bound = -1.0;
407 int hostNb = netcardList_->size();
409 if (communicationAmount_ != nullptr) {
410 for (i = 0; i < hostNb; i++) {
411 for (j = 0; j < hostNb; j++) {
413 if (communicationAmount_[i * hostNb + j] > 0) {
415 std::vector<Link*> *route = new std::vector<Link*>();
416 routing_platf->getRouteAndLatency((*netcardList_)[i], (*netcardList_)[j], route, &lat);
418 lat_current = MAX(lat_current, lat * communicationAmount_[i * hostNb + j]);
424 lat_bound = sg_tcp_gamma / (2.0 * lat_current);
425 XBT_DEBUG("action (%p) : lat_bound = %g", this, lat_bound);
426 if ((latency_ == 0.0) && (suspended_ == 0)) {
428 lmm_update_variable_bound(getModel()->getMaxminSystem(), getVariable(), lat_bound);
430 lmm_update_variable_bound(getModel()->getMaxminSystem(), getVariable(), std::min(rate_, lat_bound));
434 int L07Action::unref()
438 if (action_hook.is_linked())
439 stateSet_->erase(stateSet_->iterator_to(*this));
441 lmm_variable_free(getModel()->getMaxminSystem(), getVariable());