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. */
10 #include <unordered_set>
12 #include "ptask_L07.hpp"
14 #include "cpu_interface.hpp"
15 #include "surf_routing.hpp"
18 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_host);
19 XBT_LOG_EXTERNAL_CATEGORY(xbt_cfg);
21 /**************************************/
22 /*** Resource Creation & Destruction **/
23 /**************************************/
24 void surf_host_model_init_ptask_L07()
26 XBT_CINFO(xbt_cfg,"Switching to the L07 model to handle parallel tasks.");
27 xbt_assert(!surf_cpu_model_pm, "CPU model type already defined");
28 xbt_assert(!surf_network_model, "network model type already defined");
30 surf_host_model = new simgrid::surf::HostL07Model();
31 all_existing_models->push_back(surf_host_model);
38 HostL07Model::HostL07Model() : HostModel() {
39 maxminSystem_ = lmm_system_new(true /* lazy */);
40 maxminSystem_->solve_fun = &bottleneck_solve;
41 surf_network_model = new NetworkL07Model(this,maxminSystem_);
42 surf_cpu_model_pm = new CpuL07Model(this,maxminSystem_);
44 routing_model_create(surf_network_model->createLink("__loopback__", 498000000, 0.000015, SURF_LINK_FATPIPE));
47 HostL07Model::~HostL07Model() = default;
49 CpuL07Model::CpuL07Model(HostL07Model *hmodel,lmm_system_t sys)
55 CpuL07Model::~CpuL07Model() {
56 lmm_system_free(maxminSystem_);
57 maxminSystem_ = nullptr;
59 NetworkL07Model::NetworkL07Model(HostL07Model *hmodel, lmm_system_t sys)
65 NetworkL07Model::~NetworkL07Model()
67 maxminSystem_ = nullptr; // Avoid multi-free
71 double HostL07Model::nextOccuringEvent(double now)
73 double min = HostModel::nextOccuringEventFull(now);
74 for (auto it(getRunningActionSet()->begin()), itend(getRunningActionSet()->end()); it != itend ; ++it) {
75 L07Action *action = static_cast<L07Action*>(&*it);
76 if (action->latency_ > 0 && (min < 0 || action->latency_ < min)) {
77 min = action->latency_;
78 XBT_DEBUG("Updating min with %p (start %f): %f", action, action->getStartTime(), min);
81 XBT_DEBUG("min value: %f", min);
86 void HostL07Model::updateActionsState(double /*now*/, double delta) {
89 ActionList *actionSet = getRunningActionSet();
91 for(ActionList::iterator it = actionSet->begin(), itNext = it
92 ; it != actionSet->end()
95 action = static_cast<L07Action*>(&*it);
96 if (action->latency_ > 0) {
97 if (action->latency_ > delta) {
98 double_update(&(action->latency_), delta, sg_surf_precision);
100 action->latency_ = 0.0;
102 if ((action->latency_ == 0.0) && (action->isSuspended() == 0)) {
103 action->updateBound();
104 lmm_update_variable_weight(maxminSystem_, action->getVariable(), 1.0);
107 XBT_DEBUG("Action (%p) : remains (%g) updated by %g.",
108 action, action->getRemains(), lmm_variable_getvalue(action->getVariable()) * delta);
109 action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
111 if (action->getMaxDuration() != NO_MAX_DURATION)
112 action->updateMaxDuration(delta);
114 XBT_DEBUG("Action (%p) : remains (%g).", action, action->getRemains());
116 /* In the next if cascade, the action can be finished either because:
117 * - The amount of remaining work reached 0
118 * - The max duration was reached
119 * If it's not done, it may have failed.
122 if ((action->getRemains() <= 0) &&
123 (lmm_get_variable_weight(action->getVariable()) > 0)) {
125 action->setState(Action::State::done);
126 } else if ((action->getMaxDuration() != NO_MAX_DURATION) &&
127 (action->getMaxDuration() <= 0)) {
129 action->setState(Action::State::done);
131 /* Need to check that none of the model has failed */
132 lmm_constraint_t cnst = nullptr;
135 while ((cnst = lmm_get_cnst_from_var(maxminSystem_, action->getVariable(), i++))) {
136 void *constraint_id = lmm_constraint_id(cnst);
137 if (static_cast<simgrid::surf::Resource*>(constraint_id)->isOff()) {
138 XBT_DEBUG("Action (%p) Failed!!", action);
140 action->setState(Action::State::failed);
149 Action *HostL07Model::executeParallelTask(int host_nb, sg_host_t *host_list,
150 double *flops_amount, double *bytes_amount,double rate) {
151 return new L07Action(this, host_nb, host_list, flops_amount, bytes_amount, rate);
155 L07Action::L07Action(Model *model, int host_nb, sg_host_t *host_list,
156 double *flops_amount, double *bytes_amount, double rate)
157 : CpuAction(model, 1, 0)
160 int nb_used_host = 0; /* Only the hosts with something to compute (>0 flops) are counted) */
161 double latency = 0.0;
163 this->netcardList_->reserve(host_nb);
164 for (int i = 0; i<host_nb; i++)
165 this->netcardList_->push_back(host_list[i]->pimpl_netcard);
167 /* Compute the number of affected resources... */
168 if(bytes_amount != nullptr) {
169 std::unordered_set<const char*> affected_links;
171 for (int i = 0; i < host_nb; i++) {
172 for (int j = 0; j < host_nb; j++) {
174 if (bytes_amount[i * host_nb + j] > 0) {
176 std::vector<Link*> route;
178 routing_platf->getRouteAndLatency((*netcardList_)[i], (*netcardList_)[j], &route, &lat);
179 latency = MAX(latency, lat);
181 for (auto link : route)
182 affected_links.insert(link->getName());
187 nb_link = affected_links.size();
190 for (int i = 0; i < host_nb; i++)
191 if (flops_amount[i] > 0)
194 XBT_DEBUG("Creating a parallel task (%p) with %d hosts and %d unique links.", this, host_nb, nb_link);
195 this->computationAmount_ = flops_amount;
196 this->communicationAmount_ = bytes_amount;
197 this->latency_ = latency;
200 this->variable_ = lmm_variable_new(model->getMaxminSystem(), this, 1.0,
201 (rate > 0 ? rate : -1.0),
204 if (this->latency_ > 0)
205 lmm_update_variable_weight(model->getMaxminSystem(), this->getVariable(), 0.0);
207 for (int i = 0; i < host_nb; i++)
208 lmm_expand(model->getMaxminSystem(), host_list[i]->pimpl_cpu->getConstraint(),
209 this->getVariable(), flops_amount[i]);
211 if(bytes_amount != nullptr) {
212 for (int i = 0; i < host_nb; i++) {
213 for (int j = 0; j < host_nb; j++) {
215 if (bytes_amount[i * host_nb + j] == 0.0)
217 std::vector<Link*> route;
219 routing_platf->getRouteAndLatency((*netcardList_)[i], (*netcardList_)[j], &route, nullptr);
221 for (auto link : route)
222 lmm_expand_add(model->getMaxminSystem(), link->getConstraint(), this->getVariable(), bytes_amount[i * host_nb + j]);
227 if (nb_link + nb_used_host == 0) {
229 this->setRemains(0.0);
234 Action* NetworkL07Model::communicate(s4u::Host* src, s4u::Host* dst, double size, double rate)
236 sg_host_t*host_list = xbt_new0(sg_host_t, 2);
237 double *flops_amount = xbt_new0(double, 2);
238 double *bytes_amount = xbt_new0(double, 4);
242 bytes_amount[1] = size;
244 return hostModel_->executeParallelTask(2, host_list, flops_amount, bytes_amount, rate);
247 Cpu *CpuL07Model::createCpu(simgrid::s4u::Host *host, std::vector<double> *speedPerPstate, int core)
249 return new CpuL07(this, host, speedPerPstate, core);
252 Link* NetworkL07Model::createLink(const char* name, double bandwidth, double latency,
253 e_surf_link_sharing_policy_t policy)
255 return new LinkL07(this, name, bandwidth, latency, policy);
262 CpuL07::CpuL07(CpuL07Model* model, simgrid::s4u::Host* host, std::vector<double>* speedPerPstate, int core)
263 : Cpu(model, host, lmm_constraint_new(model->getMaxminSystem(), this, speedPerPstate->front()), speedPerPstate,
268 CpuL07::~CpuL07()=default;
270 LinkL07::LinkL07(NetworkL07Model* model, const char* name, double bandwidth, double latency,
271 e_surf_link_sharing_policy_t policy)
272 : Link(model, name, lmm_constraint_new(model->getMaxminSystem(), this, bandwidth))
274 bandwidth_.peak = bandwidth;
275 latency_.peak = latency;
277 if (policy == SURF_LINK_FATPIPE)
278 lmm_constraint_shared(getConstraint());
280 Link::onCreation(this);
283 Action *CpuL07::execution_start(double size)
285 sg_host_t*host_list = xbt_new0(sg_host_t, 1);
286 double *flops_amount = xbt_new0(double, 1);
288 host_list[0] = getHost();
289 flops_amount[0] = size;
291 return static_cast<CpuL07Model*>(getModel())->hostModel_->executeParallelTask(1, host_list, flops_amount, nullptr, -1);
294 Action *CpuL07::sleep(double duration)
296 L07Action *action = static_cast<L07Action*>(execution_start(1.0));
297 action->maxDuration_ = duration;
298 action->suspended_ = 2;
299 lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), 0.0);
304 bool CpuL07::isUsed(){
305 return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
308 /** @brief take into account changes of speed (either load or max) */
309 void CpuL07::onSpeedChange() {
310 lmm_variable_t var = nullptr;
311 lmm_element_t elem = nullptr;
313 lmm_update_constraint_bound(getModel()->getMaxminSystem(), getConstraint(), speed_.peak * speed_.scale);
314 while ((var = lmm_get_var_from_cnst (getModel()->getMaxminSystem(), getConstraint(), &elem))) {
315 Action *action = static_cast<Action*>(lmm_variable_id(var));
317 lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(), speed_.scale * speed_.peak);
320 Cpu::onSpeedChange();
324 bool LinkL07::isUsed(){
325 return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
328 void CpuL07::apply_event(tmgr_trace_iterator_t triggered, double value){
329 XBT_DEBUG("Updating cpu %s (%p) with value %g", getName(), this, value);
330 if (triggered == speed_.event) {
331 speed_.scale = value;
333 tmgr_trace_event_unref(&speed_.event);
335 } else if (triggered == stateEvent_) {
340 tmgr_trace_event_unref(&stateEvent_);
343 xbt_die("Unknown event!\n");
347 void LinkL07::apply_event(tmgr_trace_iterator_t triggered, double value) {
348 XBT_DEBUG("Updating link %s (%p) with value=%f", getName(), this, value);
349 if (triggered == bandwidth_.event) {
351 tmgr_trace_event_unref(&bandwidth_.event);
353 } else if (triggered == latency_.event) {
355 tmgr_trace_event_unref(&latency_.event);
357 } else if (triggered == stateEvent_) {
362 tmgr_trace_event_unref(&stateEvent_);
365 xbt_die("Unknown event ! \n");
369 void LinkL07::setBandwidth(double value)
371 bandwidth_.peak = value;
372 lmm_update_constraint_bound(getModel()->getMaxminSystem(), getConstraint(), bandwidth_.peak * bandwidth_.scale);
375 void LinkL07::setLatency(double value)
377 lmm_variable_t var = nullptr;
379 lmm_element_t elem = nullptr;
381 latency_.peak = value;
382 while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), getConstraint(), &elem))) {
383 action = static_cast<L07Action*>(lmm_variable_id(var));
384 action->updateBound();
392 L07Action::~L07Action(){
394 free(communicationAmount_);
395 free(computationAmount_);
398 void L07Action::updateBound()
400 double lat_current = 0.0;
401 double lat_bound = -1.0;
404 int hostNb = netcardList_->size();
406 if (communicationAmount_ != nullptr) {
407 for (i = 0; i < hostNb; i++) {
408 for (j = 0; j < hostNb; j++) {
410 if (communicationAmount_[i * hostNb + j] > 0) {
412 std::vector<Link*> route;
413 routing_platf->getRouteAndLatency((*netcardList_)[i], (*netcardList_)[j], &route, &lat);
415 lat_current = MAX(lat_current, lat * communicationAmount_[i * hostNb + j]);
420 lat_bound = sg_tcp_gamma / (2.0 * lat_current);
421 XBT_DEBUG("action (%p) : lat_bound = %g", this, lat_bound);
422 if ((latency_ == 0.0) && (suspended_ == 0)) {
424 lmm_update_variable_bound(getModel()->getMaxminSystem(), getVariable(), lat_bound);
426 lmm_update_variable_bound(getModel()->getMaxminSystem(), getVariable(), std::min(rate_, lat_bound));
430 int L07Action::unref()
434 if (action_hook.is_linked())
435 stateSet_->erase(stateSet_->iterator_to(*this));
437 lmm_variable_free(getModel()->getMaxminSystem(), getVariable());