1 /* Copyright (c) 2013-2017. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
8 #include "maxmin_private.hpp"
9 #include "network_cm02.hpp"
10 #include "simgrid/s4u/Host.hpp"
11 #include "simgrid/sg_config.h"
12 #include "src/instr/instr_private.h" // TRACE_is_enabled(). FIXME: remove by subscribing tracing to the surf signals
14 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
16 double sg_sender_gap = 0.0;
17 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
18 double sg_bandwidth_factor = 1.0; /* default value; can be set by model or from command line */
19 double sg_weight_S_parameter = 0.0; /* default value; can be set by model or from command line */
21 double sg_tcp_gamma = 0.0;
22 int sg_network_crosstraffic = 0;
24 /************************************************************************/
25 /* New model based on optimizations discussed during Pedro Velho's thesis*/
26 /************************************************************************/
27 /* @techreport{VELHO:2011:HAL-00646896:1, */
28 /* url = {http://hal.inria.fr/hal-00646896/en/}, */
29 /* title = {{Flow-level network models: have we reached the limits?}}, */
30 /* author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
31 /* type = {Rapport de recherche}, */
32 /* institution = {INRIA}, */
33 /* number = {RR-7821}, */
36 /* pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
38 void surf_network_model_init_LegrandVelho()
40 if (surf_network_model)
43 surf_network_model = new simgrid::surf::NetworkCm02Model();
44 all_existing_models->push_back(surf_network_model);
46 xbt_cfg_setdefault_double("network/latency-factor", 13.01);
47 xbt_cfg_setdefault_double("network/bandwidth-factor", 0.97);
48 xbt_cfg_setdefault_double("network/weight-S", 20537);
51 /***************************************************************************/
52 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
53 /***************************************************************************/
54 /* @TechReport{ rr-lip2002-40, */
55 /* author = {Henri Casanova and Loris Marchal}, */
56 /* institution = {LIP}, */
57 /* title = {A Network Model for Simulation of Grid Application}, */
58 /* number = {2002-40}, */
62 void surf_network_model_init_CM02()
65 if (surf_network_model)
68 surf_network_model = new simgrid::surf::NetworkCm02Model();
69 all_existing_models->push_back(surf_network_model);
71 xbt_cfg_setdefault_double("network/latency-factor", 1.0);
72 xbt_cfg_setdefault_double("network/bandwidth-factor", 1.0);
73 xbt_cfg_setdefault_double("network/weight-S", 0.0);
76 /***************************************************************************/
77 /* The models from Steven H. Low */
78 /***************************************************************************/
80 /* author={Steven H. Low}, */
81 /* title={A Duality Model of {TCP} and Queue Management Algorithms}, */
83 /* journal={{IEEE/ACM} Transactions on Networking}, */
84 /* volume={11}, number={4}, */
86 void surf_network_model_init_Reno()
88 if (surf_network_model)
91 surf_network_model = new simgrid::surf::NetworkCm02Model(&lagrange_solve);
92 all_existing_models->push_back(surf_network_model);
94 lmm_set_default_protocol_function(func_reno_f, func_reno_fp, func_reno_fpi);
96 xbt_cfg_setdefault_double("network/latency-factor", 10.4);
97 xbt_cfg_setdefault_double("network/bandwidth-factor", 0.92);
98 xbt_cfg_setdefault_double("network/weight-S", 8775);
102 void surf_network_model_init_Reno2()
104 if (surf_network_model)
107 surf_network_model = new simgrid::surf::NetworkCm02Model(&lagrange_solve);
108 all_existing_models->push_back(surf_network_model);
110 lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp, func_reno2_fpi);
112 xbt_cfg_setdefault_double("network/latency-factor", 10.4);
113 xbt_cfg_setdefault_double("network/bandwidth-factor", 0.92);
114 xbt_cfg_setdefault_double("network/weight-S", 8775);
117 void surf_network_model_init_Vegas()
119 if (surf_network_model)
122 surf_network_model = new simgrid::surf::NetworkCm02Model(&lagrange_solve);
123 all_existing_models->push_back(surf_network_model);
125 lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp, func_vegas_fpi);
127 xbt_cfg_setdefault_double("network/latency-factor", 10.4);
128 xbt_cfg_setdefault_double("network/bandwidth-factor", 0.92);
129 xbt_cfg_setdefault_double("network/weight-S", 8775);
135 NetworkCm02Model::NetworkCm02Model()
138 char *optim = xbt_cfg_get_string("network/optim");
139 bool select = xbt_cfg_get_boolean("network/maxmin-selective-update");
141 if (!strcmp(optim, "Full")) {
142 updateMechanism_ = UM_FULL;
143 selectiveUpdate_ = select;
144 } else if (!strcmp(optim, "Lazy")) {
145 updateMechanism_ = UM_LAZY;
146 selectiveUpdate_ = true;
147 xbt_assert(select || (xbt_cfg_is_default_value("network/maxmin-selective-update")),
148 "You cannot disable selective update when using the lazy update mechanism");
150 xbt_die("Unsupported optimization (%s) for this model. Accepted: Full, Lazy.", optim);
153 maxminSystem_ = lmm_system_new(selectiveUpdate_);
154 loopback_ = createLink("__loopback__", 498000000, 0.000015, SURF_LINK_FATPIPE);
156 if (updateMechanism_ == UM_LAZY) {
157 actionHeap_ = xbt_heap_new(8, nullptr);
158 xbt_heap_set_update_callback(actionHeap_, surf_action_lmm_update_index_heap);
159 modifiedSet_ = new ActionLmmList();
160 maxminSystem_->keep_track = modifiedSet_;
163 NetworkCm02Model::NetworkCm02Model(void (*specificSolveFun)(lmm_system_t self))
166 maxminSystem_->solve_fun = specificSolveFun;
169 LinkImpl* NetworkCm02Model::createLink(const char* name, double bandwidth, double latency,
170 e_surf_link_sharing_policy_t policy)
172 return new NetworkCm02Link(this, name, bandwidth, latency, policy, maxminSystem_);
175 void NetworkCm02Model::updateActionsStateLazy(double now, double /*delta*/)
177 while ((xbt_heap_size(actionHeap_) > 0)
178 && (double_equals(xbt_heap_maxkey(actionHeap_), now, sg_surf_precision))) {
180 NetworkCm02Action *action = static_cast<NetworkCm02Action*> (xbt_heap_pop(actionHeap_));
181 XBT_DEBUG("Something happened to action %p", action);
182 if (TRACE_is_enabled()) {
183 int n = lmm_get_number_of_cnst_from_var(maxminSystem_, action->getVariable());
185 for (int i = 0; i < n; i++){
186 lmm_constraint_t constraint = lmm_get_cnst_from_var(maxminSystem_, action->getVariable(), i);
187 NetworkCm02Link *link = static_cast<NetworkCm02Link*>(lmm_constraint_id(constraint));
188 double value = lmm_variable_getvalue(action->getVariable())*
189 lmm_get_cnst_weight_from_var(maxminSystem_, action->getVariable(), i);
190 TRACE_surf_link_set_utilization(link->cname(), action->getCategory(), value, action->getLastUpdate(),
191 now - action->getLastUpdate());
195 // if I am wearing a latency hat
196 if (action->getHat() == LATENCY) {
197 XBT_DEBUG("Latency paid for action %p. Activating", action);
198 lmm_update_variable_weight(maxminSystem_, action->getVariable(), action->weight_);
199 action->heapRemove(actionHeap_);
200 action->refreshLastUpdate();
202 // if I am wearing a max_duration or normal hat
203 } else if (action->getHat() == MAX_DURATION || action->getHat() == NORMAL) {
204 // no need to communicate anymore
205 // assume that flows that reached max_duration have remaining of 0
206 XBT_DEBUG("Action %p finished", action);
207 action->setRemains(0);
209 action->setState(Action::State::done);
210 action->heapRemove(actionHeap_);
218 void NetworkCm02Model::updateActionsStateFull(double now, double delta)
220 ActionList *running_actions = getRunningActionSet();
222 for(ActionList::iterator it(running_actions->begin()), itNext=it, itend(running_actions->end())
223 ; it != itend ; it=itNext) {
226 NetworkCm02Action *action = static_cast<NetworkCm02Action*> (&*it);
227 XBT_DEBUG("Something happened to action %p", action);
228 double deltap = delta;
229 if (action->latency_ > 0) {
230 if (action->latency_ > deltap) {
231 double_update(&(action->latency_), deltap, sg_surf_precision);
234 double_update(&(deltap), action->latency_, sg_surf_precision);
235 action->latency_ = 0.0;
237 if (action->latency_ <= 0.0 && !(action->isSuspended()))
238 lmm_update_variable_weight(maxminSystem_, action->getVariable(), action->weight_);
240 if (TRACE_is_enabled()) {
241 int n = lmm_get_number_of_cnst_from_var(maxminSystem_, action->getVariable());
242 for (int i = 0; i < n; i++){
243 lmm_constraint_t constraint = lmm_get_cnst_from_var(maxminSystem_, action->getVariable(), i);
245 NetworkCm02Link* link = static_cast<NetworkCm02Link*>(lmm_constraint_id(constraint));
246 TRACE_surf_link_set_utilization(link->cname(), action->getCategory(),
247 (lmm_variable_getvalue(action->getVariable()) *
248 lmm_get_cnst_weight_from_var(maxminSystem_, action->getVariable(), i)),
249 action->getLastUpdate(), now - action->getLastUpdate());
252 if (!lmm_get_number_of_cnst_from_var (maxminSystem_, action->getVariable())) {
253 /* There is actually no link used, hence an infinite bandwidth. This happens often when using models like
254 * vivaldi. In such case, just make sure that the action completes immediately.
256 action->updateRemains(action->getRemains());
258 action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
260 if (action->getMaxDuration() > NO_MAX_DURATION)
261 action->updateMaxDuration(delta);
263 if (((action->getRemains() <= 0) && (lmm_get_variable_weight(action->getVariable()) > 0)) ||
264 ((action->getMaxDuration() > NO_MAX_DURATION) && (action->getMaxDuration() <= 0))) {
266 action->setState(Action::State::done);
272 Action* NetworkCm02Model::communicate(s4u::Host* src, s4u::Host* dst, double size, double rate)
275 double latency = 0.0;
276 std::vector<LinkImpl*>* back_route = nullptr;
277 std::vector<LinkImpl*>* route = new std::vector<LinkImpl*>();
279 XBT_IN("(%s,%s,%g,%g)", src->cname(), dst->cname(), size, rate);
281 src->routeTo(dst, route, &latency);
282 xbt_assert(!route->empty() || latency,
283 "You're trying to send data from %s to %s but there is no connecting path between these two hosts.",
284 src->cname(), dst->cname());
286 for (auto link: *route)
290 if (sg_network_crosstraffic == 1) {
291 back_route = new std::vector<LinkImpl*>();
292 dst->routeTo(src, back_route, nullptr);
293 for (auto link: *back_route)
298 NetworkCm02Action *action = new NetworkCm02Action(this, size, failed);
299 action->weight_ = latency;
300 action->latency_ = latency;
301 action->rate_ = rate;
302 if (updateMechanism_ == UM_LAZY) {
303 action->indexHeap_ = -1;
304 action->lastUpdate_ = surf_get_clock();
307 double bandwidth_bound = -1.0;
308 if (sg_weight_S_parameter > 0)
309 for (auto link : *route)
310 action->weight_ += sg_weight_S_parameter / link->bandwidth();
312 for (auto link : *route) {
313 double bb = bandwidthFactor(size) * link->bandwidth();
314 bandwidth_bound = (bandwidth_bound < 0.0) ? bb : std::min(bandwidth_bound, bb);
317 action->latCurrent_ = action->latency_;
318 action->latency_ *= latencyFactor(size);
319 action->rate_ = bandwidthConstraint(action->rate_, bandwidth_bound, size);
321 xbt_assert(! route->empty(),
322 "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
324 gapAppend(size, route->at(0), action);
325 XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)", action, src->cname(), dst->cname(), action->senderGap_,
329 int constraints_per_variable = route->size();
330 if (back_route != nullptr)
331 constraints_per_variable += back_route->size();
333 if (action->latency_ > 0) {
334 action->variable_ = lmm_variable_new(maxminSystem_, action, 0.0, -1.0, constraints_per_variable);
335 if (updateMechanism_ == UM_LAZY) {
336 // add to the heap the event when the latency is payed
337 XBT_DEBUG("Added action (%p) one latency event at date %f", action, action->latency_ + action->lastUpdate_);
338 action->heapInsert(actionHeap_, action->latency_ + action->lastUpdate_, route->empty() ? NORMAL : LATENCY);
341 action->variable_ = lmm_variable_new(maxminSystem_, action, 1.0, -1.0, constraints_per_variable);
343 if (action->rate_ < 0) {
344 lmm_update_variable_bound(maxminSystem_, action->getVariable(), (action->latCurrent_ > 0) ? sg_tcp_gamma / (2.0 * action->latCurrent_) : -1.0);
346 lmm_update_variable_bound(maxminSystem_, action->getVariable(), (action->latCurrent_ > 0) ? std::min(action->rate_, sg_tcp_gamma / (2.0 * action->latCurrent_)) : action->rate_);
349 for (auto link: *route)
350 lmm_expand(maxminSystem_, link->constraint(), action->getVariable(), 1.0);
352 if (back_route != nullptr) { // sg_network_crosstraffic was activated
353 XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
354 for (auto link : *back_route)
355 lmm_expand(maxminSystem_, link->constraint(), action->getVariable(), .05);
357 //Change concurrency_share here, if you want that cross-traffic is included in the SURF concurrency
358 //(You would also have to change lmm_element_concurrency())
359 //lmm_variable_concurrency_share_set(action->getVariable(),2);
366 simgrid::s4u::Link::onCommunicate(action, src, dst);
370 void NetworkCm02Model::gapAppend(double size, const LinkImpl* link, NetworkAction* action){
377 NetworkCm02Link::NetworkCm02Link(NetworkCm02Model* model, const char* name, double bandwidth, double latency,
378 e_surf_link_sharing_policy_t policy, lmm_system_t system)
379 : LinkImpl(model, name, lmm_constraint_new(system, this, sg_bandwidth_factor * bandwidth))
381 bandwidth_.scale = 1.0;
382 bandwidth_.peak = bandwidth;
384 latency_.scale = 1.0;
385 latency_.peak = latency;
387 if (policy == SURF_LINK_FATPIPE)
388 lmm_constraint_shared(constraint());
390 simgrid::s4u::Link::onCreation(this->piface_);
393 void NetworkCm02Link::apply_event(tmgr_trace_iterator_t triggered, double value)
395 /* Find out which of my iterators was triggered, and react accordingly */
396 if (triggered == bandwidth_.event) {
398 tmgr_trace_event_unref(&bandwidth_.event);
400 } else if (triggered == latency_.event) {
402 tmgr_trace_event_unref(&latency_.event);
404 } else if (triggered == stateEvent_) {
408 lmm_variable_t var = nullptr;
409 lmm_element_t elem = nullptr;
410 double now = surf_get_clock();
413 while ((var = lmm_get_var_from_cnst(model()->getMaxminSystem(), constraint(), &elem))) {
414 Action *action = static_cast<Action*>( lmm_variable_id(var) );
416 if (action->getState() == Action::State::running ||
417 action->getState() == Action::State::ready) {
418 action->setFinishTime(now);
419 action->setState(Action::State::failed);
423 tmgr_trace_event_unref(&stateEvent_);
425 xbt_die("Unknown event!\n");
428 XBT_DEBUG("There was a resource state event, need to update actions related to the constraint (%p)", constraint());
431 void NetworkCm02Link::setBandwidth(double value)
434 bandwidth_.peak = value;
436 lmm_update_constraint_bound(model()->getMaxminSystem(), constraint(),
437 sg_bandwidth_factor * (bandwidth_.peak * bandwidth_.scale));
438 TRACE_surf_link_set_bandwidth(surf_get_clock(), cname(), sg_bandwidth_factor * bandwidth_.peak * bandwidth_.scale);
440 if (sg_weight_S_parameter > 0) {
441 double delta = sg_weight_S_parameter / value - sg_weight_S_parameter / (bandwidth_.peak * bandwidth_.scale);
444 lmm_element_t elem = nullptr;
445 lmm_element_t nextelem = nullptr;
447 while ((var = lmm_get_var_from_cnst_safe(model()->getMaxminSystem(), constraint(), &elem, &nextelem, &numelem))) {
448 NetworkCm02Action *action = static_cast<NetworkCm02Action*>(lmm_variable_id(var));
449 action->weight_ += delta;
450 if (!action->isSuspended())
451 lmm_update_variable_weight(model()->getMaxminSystem(), action->getVariable(), action->weight_);
456 void NetworkCm02Link::setLatency(double value)
458 double delta = value - latency_.peak;
459 lmm_variable_t var = nullptr;
460 lmm_element_t elem = nullptr;
461 lmm_element_t nextelem = nullptr;
464 latency_.peak = value;
466 while ((var = lmm_get_var_from_cnst_safe(model()->getMaxminSystem(), constraint(), &elem, &nextelem, &numelem))) {
467 NetworkCm02Action *action = static_cast<NetworkCm02Action*>(lmm_variable_id(var));
468 action->latCurrent_ += delta;
469 action->weight_ += delta;
470 if (action->rate_ < 0)
471 lmm_update_variable_bound(model()->getMaxminSystem(), action->getVariable(),
472 sg_tcp_gamma / (2.0 * action->latCurrent_));
474 lmm_update_variable_bound(model()->getMaxminSystem(), action->getVariable(),
475 std::min(action->rate_, sg_tcp_gamma / (2.0 * action->latCurrent_)));
477 if (action->rate_ < sg_tcp_gamma / (2.0 * action->latCurrent_)) {
478 XBT_INFO("Flow is limited BYBANDWIDTH");
480 XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f", action->latCurrent_);
483 if (!action->isSuspended())
484 lmm_update_variable_weight(model()->getMaxminSystem(), action->getVariable(), action->weight_);
492 void NetworkCm02Action::updateRemainingLazy(double now)
497 double delta = now - lastUpdate_;
500 XBT_DEBUG("Updating action(%p): remains was %f, last_update was: %f", this, remains_, lastUpdate_);
501 double_update(&(remains_), lastValue_ * delta, sg_maxmin_precision*sg_surf_precision);
503 XBT_DEBUG("Updating action(%p): remains is now %f", this, remains_);
506 if (maxDuration_ > NO_MAX_DURATION)
507 double_update(&maxDuration_, delta, sg_surf_precision);
509 if ((remains_ <= 0 && (lmm_get_variable_weight(getVariable()) > 0)) ||
510 ((maxDuration_ > NO_MAX_DURATION) && (maxDuration_ <= 0))) {
512 setState(Action::State::done);
513 heapRemove(getModel()->getActionHeap());
517 lastValue_ = lmm_variable_getvalue(getVariable());
520 void NetworkCm02Link::gapAppend(double size, const LinkImpl* link, NetworkAction* action){