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_);
45 HostL07Model::~HostL07Model() = default;
47 CpuL07Model::CpuL07Model(HostL07Model *hmodel,lmm_system_t sys)
53 CpuL07Model::~CpuL07Model() {
54 lmm_system_free(maxminSystem_);
55 maxminSystem_ = nullptr;
57 NetworkL07Model::NetworkL07Model(HostL07Model *hmodel, lmm_system_t sys)
62 loopback_ = createLink("__loopback__", 498000000, 0.000015, SURF_LINK_FATPIPE);
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 std::unordered_set<const char*> affected_links;
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;
177 routing_platf->getRouteAndLatency((*netcardList_)[i], (*netcardList_)[j], &route, &lat);
178 latency = MAX(latency, lat);
180 for (auto link : route)
181 affected_links.insert(link->getName());
186 nb_link = affected_links.size();
189 for (int i = 0; i < host_nb; i++)
190 if (flops_amount[i] > 0)
193 XBT_DEBUG("Creating a parallel task (%p) with %d hosts and %d unique links.", this, host_nb, nb_link);
194 this->computationAmount_ = flops_amount;
195 this->communicationAmount_ = bytes_amount;
196 this->latency_ = latency;
199 this->variable_ = lmm_variable_new(model->getMaxminSystem(), this, 1.0,
200 (rate > 0 ? rate : -1.0),
203 if (this->latency_ > 0)
204 lmm_update_variable_weight(model->getMaxminSystem(), this->getVariable(), 0.0);
206 for (int i = 0; i < host_nb; i++)
207 lmm_expand(model->getMaxminSystem(), host_list[i]->pimpl_cpu->getConstraint(),
208 this->getVariable(), flops_amount[i]);
210 if(bytes_amount != nullptr) {
211 for (int i = 0; i < host_nb; i++) {
212 for (int j = 0; j < host_nb; j++) {
214 if (bytes_amount[i * host_nb + j] == 0.0)
216 std::vector<Link*> route;
218 routing_platf->getRouteAndLatency((*netcardList_)[i], (*netcardList_)[j], &route, nullptr);
220 for (auto link : route)
221 lmm_expand_add(model->getMaxminSystem(), link->getConstraint(), this->getVariable(), bytes_amount[i * host_nb + j]);
226 if (nb_link + nb_used_host == 0) {
228 this->setRemains(0.0);
233 Action* NetworkL07Model::communicate(s4u::Host* src, s4u::Host* dst, double size, double rate)
235 sg_host_t*host_list = xbt_new0(sg_host_t, 2);
236 double *flops_amount = xbt_new0(double, 2);
237 double *bytes_amount = xbt_new0(double, 4);
241 bytes_amount[1] = size;
243 return hostModel_->executeParallelTask(2, host_list, flops_amount, bytes_amount, rate);
246 Cpu *CpuL07Model::createCpu(simgrid::s4u::Host *host, std::vector<double> *speedPerPstate, int core)
248 return new CpuL07(this, host, speedPerPstate, core);
251 Link* NetworkL07Model::createLink(const char* name, double bandwidth, double latency,
252 e_surf_link_sharing_policy_t policy)
254 return new LinkL07(this, name, bandwidth, latency, policy);
261 CpuL07::CpuL07(CpuL07Model* model, simgrid::s4u::Host* host, std::vector<double>* speedPerPstate, int core)
262 : Cpu(model, host, lmm_constraint_new(model->getMaxminSystem(), this, speedPerPstate->front()), speedPerPstate,
267 CpuL07::~CpuL07()=default;
269 LinkL07::LinkL07(NetworkL07Model* model, const char* name, double bandwidth, double latency,
270 e_surf_link_sharing_policy_t policy)
271 : Link(model, name, lmm_constraint_new(model->getMaxminSystem(), this, bandwidth))
273 bandwidth_.peak = bandwidth;
274 latency_.peak = latency;
276 if (policy == SURF_LINK_FATPIPE)
277 lmm_constraint_shared(getConstraint());
279 Link::onCreation(this);
282 Action *CpuL07::execution_start(double size)
284 sg_host_t*host_list = xbt_new0(sg_host_t, 1);
285 double *flops_amount = xbt_new0(double, 1);
287 host_list[0] = getHost();
288 flops_amount[0] = size;
290 return static_cast<CpuL07Model*>(getModel())->hostModel_->executeParallelTask(1, host_list, flops_amount, nullptr, -1);
293 Action *CpuL07::sleep(double duration)
295 L07Action *action = static_cast<L07Action*>(execution_start(1.0));
296 action->maxDuration_ = duration;
297 action->suspended_ = 2;
298 lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), 0.0);
303 bool CpuL07::isUsed(){
304 return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
307 /** @brief take into account changes of speed (either load or max) */
308 void CpuL07::onSpeedChange() {
309 lmm_variable_t var = nullptr;
310 lmm_element_t elem = nullptr;
312 lmm_update_constraint_bound(getModel()->getMaxminSystem(), getConstraint(), speed_.peak * speed_.scale);
313 while ((var = lmm_get_var_from_cnst (getModel()->getMaxminSystem(), getConstraint(), &elem))) {
314 Action *action = static_cast<Action*>(lmm_variable_id(var));
316 lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(), speed_.scale * speed_.peak);
319 Cpu::onSpeedChange();
323 bool LinkL07::isUsed(){
324 return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
327 void CpuL07::apply_event(tmgr_trace_iterator_t triggered, double value){
328 XBT_DEBUG("Updating cpu %s (%p) with value %g", getName(), this, value);
329 if (triggered == speed_.event) {
330 speed_.scale = value;
332 tmgr_trace_event_unref(&speed_.event);
334 } else if (triggered == stateEvent_) {
339 tmgr_trace_event_unref(&stateEvent_);
342 xbt_die("Unknown event!\n");
346 void LinkL07::apply_event(tmgr_trace_iterator_t triggered, double value) {
347 XBT_DEBUG("Updating link %s (%p) with value=%f", getName(), this, value);
348 if (triggered == bandwidth_.event) {
350 tmgr_trace_event_unref(&bandwidth_.event);
352 } else if (triggered == latency_.event) {
354 tmgr_trace_event_unref(&latency_.event);
356 } else if (triggered == stateEvent_) {
361 tmgr_trace_event_unref(&stateEvent_);
364 xbt_die("Unknown event ! \n");
368 void LinkL07::setBandwidth(double value)
370 bandwidth_.peak = value;
371 lmm_update_constraint_bound(getModel()->getMaxminSystem(), getConstraint(), bandwidth_.peak * bandwidth_.scale);
374 void LinkL07::setLatency(double value)
376 lmm_variable_t var = nullptr;
378 lmm_element_t elem = nullptr;
380 latency_.peak = value;
381 while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), getConstraint(), &elem))) {
382 action = static_cast<L07Action*>(lmm_variable_id(var));
383 action->updateBound();
391 L07Action::~L07Action(){
393 free(communicationAmount_);
394 free(computationAmount_);
397 void L07Action::updateBound()
399 double lat_current = 0.0;
400 double lat_bound = -1.0;
403 int hostNb = netcardList_->size();
405 if (communicationAmount_ != nullptr) {
406 for (i = 0; i < hostNb; i++) {
407 for (j = 0; j < hostNb; j++) {
409 if (communicationAmount_[i * hostNb + j] > 0) {
411 std::vector<Link*> route;
412 routing_platf->getRouteAndLatency((*netcardList_)[i], (*netcardList_)[j], &route, &lat);
414 lat_current = MAX(lat_current, lat * communicationAmount_[i * hostNb + j]);
419 lat_bound = sg_tcp_gamma / (2.0 * lat_current);
420 XBT_DEBUG("action (%p) : lat_bound = %g", this, lat_bound);
421 if ((latency_ == 0.0) && (suspended_ == 0)) {
423 lmm_update_variable_bound(getModel()->getMaxminSystem(), getVariable(), lat_bound);
425 lmm_update_variable_bound(getModel()->getMaxminSystem(), getVariable(), std::min(rate_, lat_bound));
429 int L07Action::unref()
433 if (action_hook.is_linked())
434 stateSet_->erase(stateSet_->iterator_to(*this));
436 lmm_variable_free(getModel()->getMaxminSystem(), getVariable());