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"
16 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_host);
17 XBT_LOG_EXTERNAL_CATEGORY(xbt_cfg);
19 /**************************************/
20 /*** Resource Creation & Destruction **/
21 /**************************************/
22 void surf_host_model_init_ptask_L07()
24 XBT_CINFO(xbt_cfg,"Switching to the L07 model to handle parallel tasks.");
25 xbt_assert(not surf_cpu_model_pm, "CPU model type already defined");
26 xbt_assert(not surf_network_model, "network model type already defined");
28 surf_host_model = new simgrid::surf::HostL07Model();
29 all_existing_models->push_back(surf_host_model);
36 HostL07Model::HostL07Model() : HostModel() {
37 maxminSystem_ = lmm_system_new(true /* lazy */);
38 maxminSystem_->solve_fun = &bottleneck_solve;
39 surf_network_model = new NetworkL07Model(this,maxminSystem_);
40 surf_cpu_model_pm = new CpuL07Model(this,maxminSystem_);
43 HostL07Model::~HostL07Model()
45 lmm_system_free(maxminSystem_);
46 maxminSystem_ = nullptr;
47 delete surf_network_model;
48 delete surf_cpu_model_pm;
51 CpuL07Model::CpuL07Model(HostL07Model *hmodel,lmm_system_t sys)
58 CpuL07Model::~CpuL07Model()
60 maxminSystem_ = nullptr;
63 NetworkL07Model::NetworkL07Model(HostL07Model *hmodel, lmm_system_t sys)
68 loopback_ = createLink("__loopback__", 498000000, 0.000015, SURF_LINK_FATPIPE);
71 NetworkL07Model::~NetworkL07Model()
73 maxminSystem_ = nullptr;
76 double HostL07Model::nextOccuringEvent(double now)
78 double min = HostModel::nextOccuringEventFull(now);
79 ActionList::iterator it(getRunningActionSet()->begin());
80 ActionList::iterator itend(getRunningActionSet()->end());
81 for (; it != itend; ++it) {
82 L07Action *action = static_cast<L07Action*>(&*it);
83 if (action->latency_ > 0 && (min < 0 || action->latency_ < min)) {
84 min = action->latency_;
85 XBT_DEBUG("Updating min with %p (start %f): %f", action, action->getStartTime(), min);
88 XBT_DEBUG("min value: %f", min);
93 void HostL07Model::updateActionsState(double /*now*/, double delta) {
96 ActionList *actionSet = getRunningActionSet();
97 ActionList::iterator it(actionSet->begin());
98 ActionList::iterator itNext = it;
99 ActionList::iterator itend(actionSet->end());
101 for (; it != itend; it = itNext) {
103 action = static_cast<L07Action*>(&*it);
104 if (action->latency_ > 0) {
105 if (action->latency_ > delta) {
106 double_update(&(action->latency_), delta, sg_surf_precision);
108 action->latency_ = 0.0;
110 if ((action->latency_ <= 0.0) && (action->isSuspended() == 0)) {
111 action->updateBound();
112 lmm_update_variable_weight(maxminSystem_, action->getVariable(), 1.0);
115 XBT_DEBUG("Action (%p) : remains (%g) updated by %g.",
116 action, action->getRemains(), lmm_variable_getvalue(action->getVariable()) * delta);
117 action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
119 if (action->getMaxDuration() > NO_MAX_DURATION)
120 action->updateMaxDuration(delta);
122 XBT_DEBUG("Action (%p) : remains (%g).", action, action->getRemains());
124 /* In the next if cascade, the action can be finished either because:
125 * - The amount of remaining work reached 0
126 * - The max duration was reached
127 * If it's not done, it may have failed.
130 if (((action->getRemains() <= 0) && (lmm_get_variable_weight(action->getVariable()) > 0)) ||
131 ((action->getMaxDuration() > NO_MAX_DURATION) && (action->getMaxDuration() <= 0))) {
133 action->setState(Action::State::done);
135 /* Need to check that none of the model has failed */
137 lmm_constraint_t cnst = lmm_get_cnst_from_var(maxminSystem_, action->getVariable(), i);
138 while (cnst != nullptr) {
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);
147 cnst = lmm_get_cnst_from_var(maxminSystem_, action->getVariable(), i);
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);
158 L07Action::L07Action(Model *model, int host_nb, sg_host_t *host_list,
159 double *flops_amount, double *bytes_amount, double rate)
160 : CpuAction(model, 1, 0)
161 , computationAmount_(flops_amount)
162 , communicationAmount_(bytes_amount)
166 int nb_used_host = 0; /* Only the hosts with something to compute (>0 flops) are counted) */
167 double latency = 0.0;
169 this->hostList_->reserve(host_nb);
170 for (int i = 0; i < host_nb; i++) {
171 this->hostList_->push_back(host_list[i]);
172 if (flops_amount[i] > 0)
176 /* Compute the number of affected resources... */
177 if(bytes_amount != nullptr) {
178 std::unordered_set<const char*> affected_links;
180 for (int i = 0; i < host_nb; i++) {
181 for (int j = 0; j < host_nb; j++) {
183 if (bytes_amount[i * host_nb + j] > 0) {
186 std::vector<LinkImpl*> route;
187 hostList_->at(i)->routeTo(hostList_->at(j), &route, &lat);
188 latency = MAX(latency, lat);
190 for (auto link : route)
191 affected_links.insert(link->cname());
196 nb_link = affected_links.size();
199 XBT_DEBUG("Creating a parallel task (%p) with %d hosts and %d unique links.", this, host_nb, nb_link);
200 this->latency_ = latency;
202 this->variable_ = lmm_variable_new(model->getMaxminSystem(), this, 1.0,
203 (rate > 0 ? rate : -1.0),
206 if (this->latency_ > 0)
207 lmm_update_variable_weight(model->getMaxminSystem(), this->getVariable(), 0.0);
209 for (int i = 0; i < host_nb; i++)
210 lmm_expand(model->getMaxminSystem(), host_list[i]->pimpl_cpu->constraint(), 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++) {
215 if (bytes_amount[i * host_nb + j] > 0.0) {
216 std::vector<LinkImpl*> route;
217 hostList_->at(i)->routeTo(hostList_->at(j), &route, nullptr);
219 for (auto link : route)
220 lmm_expand_add(model->getMaxminSystem(), link->constraint(), this->getVariable(),
221 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 LinkImpl* 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 : LinkImpl(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(constraint());
280 s4u::Link::onCreation(this->piface_);
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*>(model())->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(model()->getMaxminSystem(), action->getVariable(), 0.0);
304 bool CpuL07::isUsed(){
305 return lmm_constraint_used(model()->getMaxminSystem(), constraint());
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(model()->getMaxminSystem(), constraint(), speed_.peak * speed_.scale);
314 while ((var = lmm_get_var_from_cnst(model()->getMaxminSystem(), constraint(), &elem))) {
315 Action* action = static_cast<Action*>(lmm_variable_id(var));
317 lmm_update_variable_bound(model()->getMaxminSystem(), action->getVariable(), speed_.scale * speed_.peak);
320 Cpu::onSpeedChange();
324 bool LinkL07::isUsed(){
325 return lmm_constraint_used(model()->getMaxminSystem(), constraint());
328 void CpuL07::apply_event(tmgr_trace_event_t triggered, double value)
330 XBT_DEBUG("Updating cpu %s (%p) with value %g", cname(), this, value);
331 if (triggered == speed_.event) {
332 speed_.scale = value;
334 tmgr_trace_event_unref(&speed_.event);
336 } else if (triggered == stateEvent_) {
341 tmgr_trace_event_unref(&stateEvent_);
344 xbt_die("Unknown event!\n");
348 void LinkL07::apply_event(tmgr_trace_event_t triggered, double value)
350 XBT_DEBUG("Updating link %s (%p) with value=%f", cname(), this, value);
351 if (triggered == bandwidth_.event) {
353 tmgr_trace_event_unref(&bandwidth_.event);
355 } else if (triggered == latency_.event) {
357 tmgr_trace_event_unref(&latency_.event);
359 } else if (triggered == stateEvent_) {
364 tmgr_trace_event_unref(&stateEvent_);
367 xbt_die("Unknown event ! \n");
371 void LinkL07::setBandwidth(double value)
373 bandwidth_.peak = value;
374 lmm_update_constraint_bound(model()->getMaxminSystem(), constraint(), bandwidth_.peak * bandwidth_.scale);
377 void LinkL07::setLatency(double value)
379 lmm_variable_t var = nullptr;
381 lmm_element_t elem = nullptr;
383 latency_.peak = value;
384 while ((var = lmm_get_var_from_cnst(model()->getMaxminSystem(), constraint(), &elem))) {
385 action = static_cast<L07Action*>(lmm_variable_id(var));
386 action->updateBound();
389 LinkL07::~LinkL07() = default;
395 L07Action::~L07Action(){
397 free(communicationAmount_);
398 free(computationAmount_);
401 void L07Action::updateBound()
403 double lat_current = 0.0;
405 int hostNb = hostList_->size();
407 if (communicationAmount_ != nullptr) {
408 for (int i = 0; i < hostNb; i++) {
409 for (int j = 0; j < hostNb; j++) {
411 if (communicationAmount_[i * hostNb + j] > 0) {
413 std::vector<LinkImpl*> route;
414 hostList_->at(i)->routeTo(hostList_->at(j), &route, &lat);
416 lat_current = MAX(lat_current, lat * communicationAmount_[i * hostNb + j]);
421 double lat_bound = sg_tcp_gamma / (2.0 * lat_current);
422 XBT_DEBUG("action (%p) : lat_bound = %g", this, lat_bound);
423 if ((latency_ <= 0.0) && (suspended_ == 0)) {
425 lmm_update_variable_bound(getModel()->getMaxminSystem(), getVariable(), lat_bound);
427 lmm_update_variable_bound(getModel()->getMaxminSystem(), getVariable(), std::min(rate_, lat_bound));
431 int L07Action::unref()
435 if (action_hook.is_linked())
436 stateSet_->erase(stateSet_->iterator_to(*this));
438 lmm_variable_free(getModel()->getMaxminSystem(), getVariable());