1 /* Copyright (c) 2007-2010, 2013-2017. 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_ = new s_lmm_system_t(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()
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_ = NetworkL07Model::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 for (Action const& action : *getRunningActionSet()) {
80 const L07Action& net_action = static_cast<const L07Action&>(action);
81 if (net_action.latency_ > 0 && (min < 0 || net_action.latency_ < min)) {
82 min = net_action.latency_;
83 XBT_DEBUG("Updating min with %p (start %f): %f", &net_action, net_action.getStartTime(), min);
86 XBT_DEBUG("min value: %f", min);
91 void HostL07Model::updateActionsState(double /*now*/, double delta)
93 for (auto it = std::begin(*getRunningActionSet()); it != std::end(*getRunningActionSet());) {
94 L07Action& action = static_cast<L07Action&>(*it);
95 ++it; // increment iterator here since the following calls to action.finish() may invalidate 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 maxminSystem_->update_variable_weight(action.getVariable(), 1.0);
107 XBT_DEBUG("Action (%p) : remains (%g) updated by %g.", &action, action.getRemains(),
108 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))) {
124 action.finish(Action::State::done);
126 /* Need to check that none of the model has failed */
128 lmm_constraint_t cnst = lmm_get_cnst_from_var(maxminSystem_, action.getVariable(), i);
129 while (cnst != nullptr) {
131 void* constraint_id = cnst->get_id();
132 if (static_cast<simgrid::surf::Resource*>(constraint_id)->isOff()) {
133 XBT_DEBUG("Action (%p) Failed!!", &action);
134 action.finish(Action::State::failed);
137 cnst = lmm_get_cnst_from_var(maxminSystem_, action.getVariable(), i);
143 Action *HostL07Model::executeParallelTask(int host_nb, sg_host_t *host_list,
144 double *flops_amount, double *bytes_amount,double rate) {
145 return new L07Action(this, host_nb, host_list, flops_amount, bytes_amount, rate);
148 L07Action::L07Action(Model *model, int host_nb, sg_host_t *host_list,
149 double *flops_amount, double *bytes_amount, double rate)
150 : CpuAction(model, 1, 0)
151 , computationAmount_(flops_amount)
152 , communicationAmount_(bytes_amount)
156 int nb_used_host = 0; /* Only the hosts with something to compute (>0 flops) are counted) */
157 double latency = 0.0;
159 this->hostList_->reserve(host_nb);
160 for (int i = 0; i < host_nb; i++) {
161 this->hostList_->push_back(host_list[i]);
162 if (flops_amount[i] > 0)
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) {
176 std::vector<LinkImpl*> route;
177 hostList_->at(i)->routeTo(hostList_->at(j), route, &lat);
178 latency = std::max(latency, lat);
180 for (auto const& link : route)
181 affected_links.insert(link->getCname());
186 nb_link = affected_links.size();
189 XBT_DEBUG("Creating a parallel task (%p) with %d hosts and %d unique links.", this, host_nb, nb_link);
192 setVariable(model->getMaxminSystem()->variable_new(this, 1.0, (rate > 0 ? rate : -1.0), host_nb + nb_link));
195 model->getMaxminSystem()->update_variable_weight(getVariable(), 0.0);
197 for (int i = 0; i < host_nb; i++)
198 model->getMaxminSystem()->expand(host_list[i]->pimpl_cpu->constraint(), getVariable(), flops_amount[i]);
200 if(bytes_amount != nullptr) {
201 for (int i = 0; i < host_nb; i++) {
202 for (int j = 0; j < host_nb; j++) {
203 if (bytes_amount[i * host_nb + j] > 0.0) {
204 std::vector<LinkImpl*> route;
205 hostList_->at(i)->routeTo(hostList_->at(j), route, nullptr);
207 for (auto const& link : route)
208 model->getMaxminSystem()->expand_add(link->constraint(), this->getVariable(),
209 bytes_amount[i * host_nb + j]);
215 if (nb_link + nb_used_host == 0) {
217 this->setRemains(0.0);
222 Action* NetworkL07Model::communicate(s4u::Host* src, s4u::Host* dst, double size, double rate)
224 sg_host_t* host_list = new sg_host_t[2]();
225 double* flops_amount = new double[2]();
226 double* bytes_amount = new double[4]();
230 bytes_amount[1] = size;
232 return hostModel_->executeParallelTask(2, host_list, flops_amount, bytes_amount, rate);
235 Cpu *CpuL07Model::createCpu(simgrid::s4u::Host *host, std::vector<double> *speedPerPstate, int core)
237 return new CpuL07(this, host, speedPerPstate, core);
240 LinkImpl* NetworkL07Model::createLink(const std::string& name, double bandwidth, double latency,
241 e_surf_link_sharing_policy_t policy)
243 return new LinkL07(this, name, bandwidth, latency, policy);
250 CpuL07::CpuL07(CpuL07Model* model, simgrid::s4u::Host* host, std::vector<double>* speedPerPstate, int core)
251 : Cpu(model, host, model->getMaxminSystem()->constraint_new(this, speedPerPstate->front()), speedPerPstate, core)
255 CpuL07::~CpuL07()=default;
257 LinkL07::LinkL07(NetworkL07Model* model, const std::string& name, double bandwidth, double latency,
258 e_surf_link_sharing_policy_t policy)
259 : LinkImpl(model, name, model->getMaxminSystem()->constraint_new(this, bandwidth))
261 bandwidth_.peak = bandwidth;
262 latency_.peak = latency;
264 if (policy == SURF_LINK_FATPIPE)
265 constraint()->shared();
267 s4u::Link::onCreation(this->piface_);
270 Action *CpuL07::execution_start(double size)
272 sg_host_t* host_list = new sg_host_t[1]();
273 double* flops_amount = new double[1]();
275 host_list[0] = getHost();
276 flops_amount[0] = size;
278 return static_cast<CpuL07Model*>(model())->hostModel_->executeParallelTask(1, host_list, flops_amount, nullptr, -1);
281 Action *CpuL07::sleep(double duration)
283 L07Action *action = static_cast<L07Action*>(execution_start(1.0));
284 action->setMaxDuration(duration);
285 action->suspended_ = 2;
286 model()->getMaxminSystem()->update_variable_weight(action->getVariable(), 0.0);
291 bool CpuL07::isUsed(){
292 return model()->getMaxminSystem()->constraint_used(constraint());
295 /** @brief take into account changes of speed (either load or max) */
296 void CpuL07::onSpeedChange() {
297 lmm_variable_t var = nullptr;
298 lmm_element_t elem = nullptr;
300 model()->getMaxminSystem()->update_constraint_bound(constraint(), speed_.peak * speed_.scale);
301 while ((var = constraint()->get_variable(&elem))) {
302 Action* action = static_cast<Action*>(lmm_variable_id(var));
304 model()->getMaxminSystem()->update_variable_bound(action->getVariable(), speed_.scale * speed_.peak);
307 Cpu::onSpeedChange();
311 bool LinkL07::isUsed(){
312 return model()->getMaxminSystem()->constraint_used(constraint());
315 void CpuL07::apply_event(tmgr_trace_event_t triggered, double value)
317 XBT_DEBUG("Updating cpu %s (%p) with value %g", getCname(), this, value);
318 if (triggered == speed_.event) {
319 speed_.scale = value;
321 tmgr_trace_event_unref(&speed_.event);
323 } else if (triggered == stateEvent_) {
328 tmgr_trace_event_unref(&stateEvent_);
331 xbt_die("Unknown event!\n");
335 void LinkL07::apply_event(tmgr_trace_event_t triggered, double value)
337 XBT_DEBUG("Updating link %s (%p) with value=%f", getCname(), this, value);
338 if (triggered == bandwidth_.event) {
340 tmgr_trace_event_unref(&bandwidth_.event);
342 } else if (triggered == latency_.event) {
344 tmgr_trace_event_unref(&latency_.event);
346 } else if (triggered == stateEvent_) {
351 tmgr_trace_event_unref(&stateEvent_);
354 xbt_die("Unknown event ! \n");
358 void LinkL07::setBandwidth(double value)
360 bandwidth_.peak = value;
361 model()->getMaxminSystem()->update_constraint_bound(constraint(), bandwidth_.peak * bandwidth_.scale);
364 void LinkL07::setLatency(double value)
366 lmm_variable_t var = nullptr;
368 lmm_element_t elem = nullptr;
370 latency_.peak = value;
371 while ((var = constraint()->get_variable(&elem))) {
372 action = static_cast<L07Action*>(lmm_variable_id(var));
373 action->updateBound();
376 LinkL07::~LinkL07() = default;
382 L07Action::~L07Action(){
384 delete[] communicationAmount_;
385 delete[] computationAmount_;
388 void L07Action::updateBound()
390 double lat_current = 0.0;
392 int hostNb = hostList_->size();
394 if (communicationAmount_ != nullptr) {
395 for (int i = 0; i < hostNb; i++) {
396 for (int j = 0; j < hostNb; j++) {
398 if (communicationAmount_[i * hostNb + j] > 0) {
400 std::vector<LinkImpl*> route;
401 hostList_->at(i)->routeTo(hostList_->at(j), route, &lat);
403 lat_current = std::max(lat_current, lat * communicationAmount_[i * hostNb + j]);
408 double lat_bound = sg_tcp_gamma / (2.0 * lat_current);
409 XBT_DEBUG("action (%p) : lat_bound = %g", this, lat_bound);
410 if ((latency_ <= 0.0) && (suspended_ == 0)) {
412 getModel()->getMaxminSystem()->update_variable_bound(getVariable(), lat_bound);
414 getModel()->getMaxminSystem()->update_variable_bound(getVariable(), std::min(rate_, lat_bound));
418 int L07Action::unref()
422 if (action_hook.is_linked())
423 stateSet_->erase(stateSet_->iterator_to(*this));
425 getModel()->getMaxminSystem()->variable_free(getVariable());