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"
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_);
44 HostL07Model::~HostL07Model()
46 lmm_system_free(maxminSystem_);
47 maxminSystem_ = nullptr;
50 CpuL07Model::CpuL07Model(HostL07Model *hmodel,lmm_system_t sys)
56 CpuL07Model::~CpuL07Model() = default;
58 NetworkL07Model::NetworkL07Model(HostL07Model *hmodel, lmm_system_t sys)
63 loopback_ = createLink("__loopback__", 498000000, 0.000015, SURF_LINK_FATPIPE);
65 NetworkL07Model::~NetworkL07Model() = default;
68 double HostL07Model::nextOccuringEvent(double now)
70 double min = HostModel::nextOccuringEventFull(now);
71 ActionList::iterator it(getRunningActionSet()->begin());
72 ActionList::iterator itend(getRunningActionSet()->end());
73 for (; 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();
89 ActionList::iterator it(actionSet->begin());
90 ActionList::iterator itNext = it;
91 ActionList::iterator itend(actionSet->end());
93 for (; it != itend; it = itNext) {
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) && (lmm_get_variable_weight(action->getVariable()) > 0)) ||
123 ((action->getMaxDuration() != NO_MAX_DURATION) && (action->getMaxDuration() <= 0))) {
125 action->setState(Action::State::done);
127 /* Need to check that none of the model has failed */
129 lmm_constraint_t cnst = lmm_get_cnst_from_var(maxminSystem_, action->getVariable(), i);
130 while (cnst != nullptr) {
132 void *constraint_id = lmm_constraint_id(cnst);
133 if (static_cast<simgrid::surf::Resource*>(constraint_id)->isOff()) {
134 XBT_DEBUG("Action (%p) Failed!!", action);
136 action->setState(Action::State::failed);
139 cnst = lmm_get_cnst_from_var(maxminSystem_, action->getVariable(), i);
145 Action *HostL07Model::executeParallelTask(int host_nb, sg_host_t *host_list,
146 double *flops_amount, double *bytes_amount,double rate) {
147 return new L07Action(this, host_nb, host_list, flops_amount, bytes_amount, rate);
150 L07Action::L07Action(Model *model, int host_nb, sg_host_t *host_list,
151 double *flops_amount, double *bytes_amount, double rate)
152 : CpuAction(model, 1, 0)
153 , computationAmount_(flops_amount)
154 , communicationAmount_(bytes_amount)
158 int nb_used_host = 0; /* Only the hosts with something to compute (>0 flops) are counted) */
159 double latency = 0.0;
161 this->hostList_->reserve(host_nb);
162 for (int i = 0; i<host_nb; i++)
163 this->hostList_->push_back(host_list[i]);
165 /* Compute the number of affected resources... */
166 if(bytes_amount != nullptr) {
167 std::unordered_set<const char*> affected_links;
169 for (int i = 0; i < host_nb; i++) {
170 for (int j = 0; j < host_nb; j++) {
172 if (bytes_amount[i * host_nb + j] > 0) {
175 std::vector<LinkImpl*> route;
176 hostList_->at(i)->routeTo(hostList_->at(j), &route, &lat);
177 latency = MAX(latency, lat);
179 for (auto link : route)
180 affected_links.insert(link->cname());
185 nb_link = affected_links.size();
188 for (int i = 0; i < host_nb; i++)
189 if (flops_amount[i] > 0)
192 XBT_DEBUG("Creating a parallel task (%p) with %d hosts and %d unique links.", this, host_nb, nb_link);
193 this->latency_ = latency;
195 this->variable_ = lmm_variable_new(model->getMaxminSystem(), this, 1.0,
196 (rate > 0 ? rate : -1.0),
199 if (this->latency_ > 0)
200 lmm_update_variable_weight(model->getMaxminSystem(), this->getVariable(), 0.0);
202 for (int i = 0; i < host_nb; i++)
203 lmm_expand(model->getMaxminSystem(), host_list[i]->pimpl_cpu->constraint(), this->getVariable(), flops_amount[i]);
205 if(bytes_amount != nullptr) {
206 for (int i = 0; i < host_nb; i++) {
207 for (int j = 0; j < host_nb; j++) {
208 if (bytes_amount[i * host_nb + j] > 0.0) {
209 std::vector<LinkImpl*> route;
210 hostList_->at(i)->routeTo(hostList_->at(j), &route, nullptr);
212 for (auto link : route)
213 lmm_expand_add(model->getMaxminSystem(), link->constraint(), this->getVariable(),
214 bytes_amount[i * host_nb + j]);
220 if (nb_link + nb_used_host == 0) {
222 this->setRemains(0.0);
227 Action* NetworkL07Model::communicate(s4u::Host* src, s4u::Host* dst, double size, double rate)
229 sg_host_t*host_list = xbt_new0(sg_host_t, 2);
230 double *flops_amount = xbt_new0(double, 2);
231 double *bytes_amount = xbt_new0(double, 4);
235 bytes_amount[1] = size;
237 return hostModel_->executeParallelTask(2, host_list, flops_amount, bytes_amount, rate);
240 Cpu *CpuL07Model::createCpu(simgrid::s4u::Host *host, std::vector<double> *speedPerPstate, int core)
242 return new CpuL07(this, host, speedPerPstate, core);
245 LinkImpl* NetworkL07Model::createLink(const char* name, double bandwidth, double latency,
246 e_surf_link_sharing_policy_t policy)
248 return new LinkL07(this, name, bandwidth, latency, policy);
255 CpuL07::CpuL07(CpuL07Model* model, simgrid::s4u::Host* host, std::vector<double>* speedPerPstate, int core)
256 : Cpu(model, host, lmm_constraint_new(model->getMaxminSystem(), this, speedPerPstate->front()), speedPerPstate,
261 CpuL07::~CpuL07()=default;
263 LinkL07::LinkL07(NetworkL07Model* model, const char* name, double bandwidth, double latency,
264 e_surf_link_sharing_policy_t policy)
265 : LinkImpl(model, name, lmm_constraint_new(model->getMaxminSystem(), this, bandwidth))
267 bandwidth_.peak = bandwidth;
268 latency_.peak = latency;
270 if (policy == SURF_LINK_FATPIPE)
271 lmm_constraint_shared(constraint());
273 s4u::Link::onCreation(this->piface_);
276 Action *CpuL07::execution_start(double size)
278 sg_host_t*host_list = xbt_new0(sg_host_t, 1);
279 double *flops_amount = xbt_new0(double, 1);
281 host_list[0] = getHost();
282 flops_amount[0] = size;
284 return static_cast<CpuL07Model*>(model())->hostModel_->executeParallelTask(1, host_list, flops_amount, nullptr, -1);
287 Action *CpuL07::sleep(double duration)
289 L07Action *action = static_cast<L07Action*>(execution_start(1.0));
290 action->maxDuration_ = duration;
291 action->suspended_ = 2;
292 lmm_update_variable_weight(model()->getMaxminSystem(), action->getVariable(), 0.0);
297 bool CpuL07::isUsed(){
298 return lmm_constraint_used(model()->getMaxminSystem(), constraint());
301 /** @brief take into account changes of speed (either load or max) */
302 void CpuL07::onSpeedChange() {
303 lmm_variable_t var = nullptr;
304 lmm_element_t elem = nullptr;
306 lmm_update_constraint_bound(model()->getMaxminSystem(), constraint(), speed_.peak * speed_.scale);
307 while ((var = lmm_get_var_from_cnst(model()->getMaxminSystem(), constraint(), &elem))) {
308 Action* action = static_cast<Action*>(lmm_variable_id(var));
310 lmm_update_variable_bound(model()->getMaxminSystem(), action->getVariable(), speed_.scale * speed_.peak);
313 Cpu::onSpeedChange();
317 bool LinkL07::isUsed(){
318 return lmm_constraint_used(model()->getMaxminSystem(), constraint());
321 void CpuL07::apply_event(tmgr_trace_iterator_t triggered, double value){
322 XBT_DEBUG("Updating cpu %s (%p) with value %g", cname(), this, value);
323 if (triggered == speed_.event) {
324 speed_.scale = value;
326 tmgr_trace_event_unref(&speed_.event);
328 } else if (triggered == stateEvent_) {
333 tmgr_trace_event_unref(&stateEvent_);
336 xbt_die("Unknown event!\n");
340 void LinkL07::apply_event(tmgr_trace_iterator_t triggered, double value) {
341 XBT_DEBUG("Updating link %s (%p) with value=%f", cname(), this, value);
342 if (triggered == bandwidth_.event) {
344 tmgr_trace_event_unref(&bandwidth_.event);
346 } else if (triggered == latency_.event) {
348 tmgr_trace_event_unref(&latency_.event);
350 } else if (triggered == stateEvent_) {
355 tmgr_trace_event_unref(&stateEvent_);
358 xbt_die("Unknown event ! \n");
362 void LinkL07::setBandwidth(double value)
364 bandwidth_.peak = value;
365 lmm_update_constraint_bound(model()->getMaxminSystem(), constraint(), bandwidth_.peak * bandwidth_.scale);
368 void LinkL07::setLatency(double value)
370 lmm_variable_t var = nullptr;
372 lmm_element_t elem = nullptr;
374 latency_.peak = value;
375 while ((var = lmm_get_var_from_cnst(model()->getMaxminSystem(), constraint(), &elem))) {
376 action = static_cast<L07Action*>(lmm_variable_id(var));
377 action->updateBound();
380 LinkL07::~LinkL07() = default;
386 L07Action::~L07Action(){
388 free(communicationAmount_);
389 free(computationAmount_);
392 void L07Action::updateBound()
394 double lat_current = 0.0;
396 int hostNb = hostList_->size();
398 if (communicationAmount_ != nullptr) {
399 for (int i = 0; i < hostNb; i++) {
400 for (int j = 0; j < hostNb; j++) {
402 if (communicationAmount_[i * hostNb + j] > 0) {
404 std::vector<LinkImpl*> route;
405 hostList_->at(i)->routeTo(hostList_->at(j), &route, &lat);
407 lat_current = MAX(lat_current, lat * communicationAmount_[i * hostNb + j]);
412 double lat_bound = sg_tcp_gamma / (2.0 * lat_current);
413 XBT_DEBUG("action (%p) : lat_bound = %g", this, lat_bound);
414 if ((latency_ == 0.0) && (suspended_ == 0)) {
416 lmm_update_variable_bound(getModel()->getMaxminSystem(), getVariable(), lat_bound);
418 lmm_update_variable_bound(getModel()->getMaxminSystem(), getVariable(), std::min(rate_, lat_bound));
422 int L07Action::unref()
426 if (action_hook.is_linked())
427 stateSet_->erase(stateSet_->iterator_to(*this));
429 lmm_variable_free(getModel()->getMaxminSystem(), getVariable());