1 /* Copyright (c) 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. */
9 #include "network_cm02.hpp"
10 #include "maxmin_private.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_);
155 routing_model_create(createLink("__loopback__", 498000000, 0.000015, SURF_LINK_FATPIPE, nullptr));
157 if (updateMechanism_ == UM_LAZY) {
158 actionHeap_ = xbt_heap_new(8, nullptr);
159 xbt_heap_set_update_callback(actionHeap_, surf_action_lmm_update_index_heap);
160 modifiedSet_ = new ActionLmmList();
161 maxminSystem_->keep_track = modifiedSet_;
164 NetworkCm02Model::NetworkCm02Model(void (*specificSolveFun)(lmm_system_t self))
167 maxminSystem_->solve_fun = specificSolveFun;
171 NetworkCm02Model::~NetworkCm02Model() {}
173 Link* NetworkCm02Model::createLink(const char *name, double bandwidth, double latency, e_surf_link_sharing_policy_t policy,
174 xbt_dict_t properties)
176 return new NetworkCm02Link(this, name, properties, bandwidth, latency, policy, maxminSystem_);
179 void NetworkCm02Model::updateActionsStateLazy(double now, double /*delta*/)
181 while ((xbt_heap_size(actionHeap_) > 0)
182 && (double_equals(xbt_heap_maxkey(actionHeap_), now, sg_surf_precision))) {
184 NetworkCm02Action *action = static_cast<NetworkCm02Action*> (xbt_heap_pop(actionHeap_));
185 XBT_DEBUG("Something happened to action %p", action);
186 if (TRACE_is_enabled()) {
187 int n = lmm_get_number_of_cnst_from_var(maxminSystem_, action->getVariable());
189 for (int i = 0; i < n; i++){
190 lmm_constraint_t constraint = lmm_get_cnst_from_var(maxminSystem_, action->getVariable(), i);
191 NetworkCm02Link *link = static_cast<NetworkCm02Link*>(lmm_constraint_id(constraint));
192 double value = lmm_variable_getvalue(action->getVariable())*
193 lmm_get_cnst_weight_from_var(maxminSystem_, action->getVariable(), i);
194 TRACE_surf_link_set_utilization(link->getName(), action->getCategory(), value,
195 action->getLastUpdate(), now - action->getLastUpdate());
199 // if I am wearing a latency hat
200 if (action->getHat() == LATENCY) {
201 XBT_DEBUG("Latency paid for action %p. Activating", action);
202 lmm_update_variable_weight(maxminSystem_, action->getVariable(), action->weight_);
203 action->heapRemove(actionHeap_);
204 action->refreshLastUpdate();
206 // if I am wearing a max_duration or normal hat
207 } else if (action->getHat() == MAX_DURATION || action->getHat() == NORMAL) {
208 // no need to communicate anymore
209 // assume that flows that reached max_duration have remaining of 0
210 XBT_DEBUG("Action %p finished", action);
211 action->setRemains(0);
213 action->setState(Action::State::done);
214 action->heapRemove(actionHeap_);
223 void NetworkCm02Model::updateActionsStateFull(double now, double delta)
225 ActionList *running_actions = getRunningActionSet();
227 for(ActionList::iterator it(running_actions->begin()), itNext=it, itend(running_actions->end())
228 ; it != itend ; it=itNext) {
231 NetworkCm02Action *action = static_cast<NetworkCm02Action*> (&*it);
232 XBT_DEBUG("Something happened to action %p", action);
233 double deltap = delta;
234 if (action->latency_ > 0) {
235 if (action->latency_ > deltap) {
236 double_update(&(action->latency_), deltap, sg_surf_precision);
239 double_update(&(deltap), action->latency_, sg_surf_precision);
240 action->latency_ = 0.0;
242 if (action->latency_ == 0.0 && !(action->isSuspended()))
243 lmm_update_variable_weight(maxminSystem_, action->getVariable(),
246 if (TRACE_is_enabled()) {
247 int n = lmm_get_number_of_cnst_from_var(maxminSystem_, action->getVariable());
248 for (int i = 0; i < n; i++){
249 lmm_constraint_t constraint = lmm_get_cnst_from_var(maxminSystem_, action->getVariable(), i);
251 NetworkCm02Link* link = static_cast<NetworkCm02Link*>(lmm_constraint_id(constraint));
252 TRACE_surf_link_set_utilization(link->getName(),
253 action->getCategory(),
254 (lmm_variable_getvalue(action->getVariable())*
255 lmm_get_cnst_weight_from_var(maxminSystem_,
256 action->getVariable(),
258 action->getLastUpdate(),
259 now - action->getLastUpdate());
262 if (!lmm_get_number_of_cnst_from_var (maxminSystem_, action->getVariable())) {
263 /* There is actually no link used, hence an infinite bandwidth.
264 * This happens often when using models like vivaldi.
265 * In such case, just make sure that the action completes immediately.
267 action->updateRemains(action->getRemains());
269 action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
271 if (action->getMaxDuration() != NO_MAX_DURATION)
272 action->updateMaxDuration(delta);
274 if ((action->getRemains() <= 0) &&
275 (lmm_get_variable_weight(action->getVariable()) > 0)) {
277 action->setState(Action::State::done);
279 } else if (((action->getMaxDuration() != NO_MAX_DURATION)
280 && (action->getMaxDuration() <= 0))) {
282 action->setState(Action::State::done);
288 Action *NetworkCm02Model::communicate(kernel::routing::NetCard *src, kernel::routing::NetCard *dst,
289 double size, double rate)
292 double bandwidth_bound;
293 double latency = 0.0;
294 std::vector<Link*> * back_route = nullptr;
295 int constraints_per_variable = 0;
297 std::vector<Link*> *route = new std::vector<Link*>();
299 XBT_IN("(%s,%s,%g,%g)", src->name(), dst->name(), size, rate);
301 routing_platf->getRouteAndLatency(src, dst, route, &latency);
302 xbt_assert(! route->empty() || latency,
303 "You're trying to send data from %s to %s but there is no connecting path between these two hosts.",
304 src->name(), dst->name());
306 for (auto link: *route)
310 if (sg_network_crosstraffic == 1) {
311 back_route = new std::vector<Link*>();
312 routing_platf->getRouteAndLatency(dst, src, back_route, nullptr);
313 for (auto link: *back_route)
318 NetworkCm02Action *action = new NetworkCm02Action(this, size, failed);
319 action->weight_ = action->latency_ = latency;
321 action->rate_ = rate;
322 if (updateMechanism_ == UM_LAZY) {
323 action->indexHeap_ = -1;
324 action->lastUpdate_ = surf_get_clock();
327 bandwidth_bound = -1.0;
328 if (sg_weight_S_parameter > 0)
329 for (auto link : *route)
330 action->weight_ += sg_weight_S_parameter / link->getBandwidth();
332 for (auto link : *route) {
333 double bb = bandwidthFactor(size) * link->getBandwidth();
334 bandwidth_bound = (bandwidth_bound < 0.0) ? bb : std::min(bandwidth_bound, bb);
337 action->latCurrent_ = action->latency_;
338 action->latency_ *= latencyFactor(size);
339 action->rate_ = bandwidthConstraint(action->rate_, bandwidth_bound, size);
341 xbt_assert(! route->empty(),
342 "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
344 gapAppend(size, route->at(0), action);
345 XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)", action, src->name(), dst->name(), action->senderGap_, action->latency_);
348 constraints_per_variable = route->size();
349 if (back_route != nullptr)
350 constraints_per_variable += back_route->size();
352 if (action->latency_ > 0) {
353 action->variable_ = lmm_variable_new(maxminSystem_, action, 0.0, -1.0, constraints_per_variable);
354 if (updateMechanism_ == UM_LAZY) {
355 // add to the heap the event when the latency is payed
356 XBT_DEBUG("Added action (%p) one latency event at date %f", action, action->latency_ + action->lastUpdate_);
357 action->heapInsert(actionHeap_, action->latency_ + action->lastUpdate_, route->empty() ? NORMAL : LATENCY);
360 action->variable_ = lmm_variable_new(maxminSystem_, action, 1.0, -1.0, constraints_per_variable);
362 if (action->rate_ < 0) {
363 lmm_update_variable_bound(maxminSystem_, action->getVariable(), (action->latCurrent_ > 0) ? sg_tcp_gamma / (2.0 * action->latCurrent_) : -1.0);
365 lmm_update_variable_bound(maxminSystem_, action->getVariable(), (action->latCurrent_ > 0) ? std::min(action->rate_, sg_tcp_gamma / (2.0 * action->latCurrent_)) : action->rate_);
368 for (auto link: *route)
369 lmm_expand(maxminSystem_, link->getConstraint(), action->getVariable(), 1.0);
371 if (sg_network_crosstraffic == 1) {
372 XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
373 for (auto link : *back_route)
374 lmm_expand(maxminSystem_, link->getConstraint(), action->getVariable(), .05);
376 //Change concurrency_share here, if you want that cross-traffic is included in the SURF concurrency
377 //(You would also have to change lmm_element_concurrency())
378 //lmm_variable_concurrency_share_set(action->getVariable(),2);
385 Link::onCommunicate(action, src, dst);
389 void NetworkCm02Model::gapAppend(double size, const Link* link, NetworkAction* action)
397 NetworkCm02Link::NetworkCm02Link(NetworkCm02Model *model, const char *name, xbt_dict_t props,
398 double bandwidth, double latency, e_surf_link_sharing_policy_t policy,
400 : Link(model, name, props, lmm_constraint_new(system, this, sg_bandwidth_factor * bandwidth))
402 m_bandwidth.scale = 1.0;
403 m_bandwidth.peak = bandwidth;
405 m_latency.scale = 1.0;
406 m_latency.peak = latency;
408 if (policy == SURF_LINK_FATPIPE)
409 lmm_constraint_shared(getConstraint());
411 Link::onCreation(this);
416 void NetworkCm02Link::apply_event(tmgr_trace_iterator_t triggered, double value)
419 /* Find out which of my iterators was triggered, and react accordingly */
420 if (triggered == m_bandwidth.event) {
421 updateBandwidth(value);
422 tmgr_trace_event_unref(&m_bandwidth.event);
424 } else if (triggered == m_latency.event) {
425 updateLatency(value);
426 tmgr_trace_event_unref(&m_latency.event);
428 } else if (triggered == m_stateEvent) {
432 lmm_variable_t var = nullptr;
433 lmm_element_t elem = nullptr;
434 double now = surf_get_clock();
437 while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), getConstraint(), &elem))) {
438 Action *action = static_cast<Action*>( lmm_variable_id(var) );
440 if (action->getState() == Action::State::running ||
441 action->getState() == Action::State::ready) {
442 action->setFinishTime(now);
443 action->setState(Action::State::failed);
447 tmgr_trace_event_unref(&m_stateEvent);
449 xbt_die("Unknown event!\n");
452 XBT_DEBUG("There was a resource state event, need to update actions related to the constraint (%p)",
456 void NetworkCm02Link::updateBandwidth(double value) {
458 m_bandwidth.peak = value;
460 lmm_update_constraint_bound(getModel()->getMaxminSystem(), getConstraint(),
461 sg_bandwidth_factor * (m_bandwidth.peak * m_bandwidth.scale));
462 TRACE_surf_link_set_bandwidth(surf_get_clock(), getName(), sg_bandwidth_factor * m_bandwidth.peak * m_bandwidth.scale);
464 if (sg_weight_S_parameter > 0) {
465 double delta = sg_weight_S_parameter / value - sg_weight_S_parameter / (m_bandwidth.peak * m_bandwidth.scale);
468 lmm_element_t elem = nullptr, nextelem = nullptr;
470 while ((var = lmm_get_var_from_cnst_safe(getModel()->getMaxminSystem(), getConstraint(), &elem, &nextelem, &numelem))) {
471 NetworkCm02Action *action = (NetworkCm02Action*) lmm_variable_id(var);
472 action->weight_ += delta;
473 if (!action->isSuspended())
474 lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), action->weight_);
479 void NetworkCm02Link::updateLatency(double value){
480 double delta = value - m_latency.peak;
481 lmm_variable_t var = nullptr;
482 lmm_element_t elem = nullptr;
483 lmm_element_t nextelem = nullptr;
486 m_latency.peak = value;
488 while ((var = lmm_get_var_from_cnst_safe(getModel()->getMaxminSystem(), getConstraint(), &elem, &nextelem, &numelem))) {
489 NetworkCm02Action *action = (NetworkCm02Action*) lmm_variable_id(var);
490 action->latCurrent_ += delta;
491 action->weight_ += delta;
492 if (action->rate_ < 0)
493 lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(), sg_tcp_gamma / (2.0 * action->latCurrent_));
495 lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(),
496 std::min(action->rate_, sg_tcp_gamma / (2.0 * action->latCurrent_)));
498 if (action->rate_ < sg_tcp_gamma / (2.0 * action->latCurrent_)) {
499 XBT_INFO("Flow is limited BYBANDWIDTH");
501 XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f", action->latCurrent_);
504 if (!action->isSuspended())
505 lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), action->weight_);
509 NetworkCm02Link::~NetworkCm02Link() {}
515 NetworkCm02Action::~NetworkCm02Action() {}
517 void NetworkCm02Action::updateRemainingLazy(double now)
524 delta = now - lastUpdate_;
527 XBT_DEBUG("Updating action(%p): remains was %f, last_update was: %f", this, remains_, lastUpdate_);
528 double_update(&(remains_), lastValue_ * delta, sg_maxmin_precision*sg_surf_precision);
530 XBT_DEBUG("Updating action(%p): remains is now %f", this, remains_);
533 if (maxDuration_ != NO_MAX_DURATION)
534 double_update(&maxDuration_, delta, sg_surf_precision);
537 (lmm_get_variable_weight(getVariable()) > 0)) {
539 setState(Action::State::done);
541 heapRemove(getModel()->getActionHeap());
542 } else if (((maxDuration_ != NO_MAX_DURATION)
543 && (maxDuration_ <= 0))) {
545 setState(Action::State::done);
546 heapRemove(getModel()->getActionHeap());
550 lastValue_ = lmm_variable_getvalue(getVariable());
553 void NetworkCm02Link::gapAppend(double size, const Link* link, NetworkAction* action)