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_latency_factor = 1.0; /* default value; can be set by model or from command line */
17 double sg_bandwidth_factor = 1.0; /* default value; can be set by model or from command line */
18 double sg_weight_S_parameter = 0.0; /* default value; can be set by model or from command line */
20 double sg_tcp_gamma = 0.0;
21 int sg_network_crosstraffic = 0;
23 /************************************************************************/
24 /* New model based on optimizations discussed during Pedro Velho's thesis*/
25 /************************************************************************/
26 /* @techreport{VELHO:2011:HAL-00646896:1, */
27 /* url = {http://hal.inria.fr/hal-00646896/en/}, */
28 /* title = {{Flow-level network models: have we reached the limits?}}, */
29 /* author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
30 /* type = {Rapport de recherche}, */
31 /* institution = {INRIA}, */
32 /* number = {RR-7821}, */
35 /* pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
37 void surf_network_model_init_LegrandVelho()
39 if (surf_network_model)
42 surf_network_model = new simgrid::surf::NetworkCm02Model();
43 all_existing_models->push_back(surf_network_model);
45 xbt_cfg_setdefault_double("network/latency-factor", 13.01);
46 xbt_cfg_setdefault_double("network/bandwidth-factor", 0.97);
47 xbt_cfg_setdefault_double("network/weight-S", 20537);
50 /***************************************************************************/
51 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
52 /***************************************************************************/
53 /* @TechReport{ rr-lip2002-40, */
54 /* author = {Henri Casanova and Loris Marchal}, */
55 /* institution = {LIP}, */
56 /* title = {A Network Model for Simulation of Grid Application}, */
57 /* number = {2002-40}, */
61 void surf_network_model_init_CM02()
64 if (surf_network_model)
67 xbt_cfg_setdefault_double("network/latency-factor", 1.0);
68 xbt_cfg_setdefault_double("network/bandwidth-factor", 1.0);
69 xbt_cfg_setdefault_double("network/weight-S", 0.0);
71 surf_network_model = new simgrid::surf::NetworkCm02Model();
72 all_existing_models->push_back(surf_network_model);
75 /***************************************************************************/
76 /* The models from Steven H. Low */
77 /***************************************************************************/
79 /* author={Steven H. Low}, */
80 /* title={A Duality Model of {TCP} and Queue Management Algorithms}, */
82 /* journal={{IEEE/ACM} Transactions on Networking}, */
83 /* volume={11}, number={4}, */
85 void surf_network_model_init_Reno()
87 if (surf_network_model)
90 lmm_set_default_protocol_function(func_reno_f, func_reno_fp, func_reno_fpi);
92 xbt_cfg_setdefault_double("network/latency-factor", 13.01);
93 xbt_cfg_setdefault_double("network/bandwidth-factor", 0.97);
94 xbt_cfg_setdefault_double("network/weight-S", 20537);
96 surf_network_model = new simgrid::surf::NetworkCm02Model(&lagrange_solve);
97 all_existing_models->push_back(surf_network_model);
101 void surf_network_model_init_Reno2()
103 if (surf_network_model)
106 lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp, func_reno2_fpi);
108 xbt_cfg_setdefault_double("network/latency-factor", 13.01);
109 xbt_cfg_setdefault_double("network/bandwidth-factor", 0.97);
110 xbt_cfg_setdefault_double("network/weight-S", 20537);
112 surf_network_model = new simgrid::surf::NetworkCm02Model(&lagrange_solve);
113 all_existing_models->push_back(surf_network_model);
116 void surf_network_model_init_Vegas()
118 if (surf_network_model)
121 lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp, func_vegas_fpi);
123 xbt_cfg_setdefault_double("network/latency-factor", 13.01);
124 xbt_cfg_setdefault_double("network/bandwidth-factor", 0.97);
125 xbt_cfg_setdefault_double("network/weight-S", 20537);
127 surf_network_model = new simgrid::surf::NetworkCm02Model(&lagrange_solve);
128 all_existing_models->push_back(surf_network_model);
134 NetworkCm02Model::NetworkCm02Model()
137 char *optim = xbt_cfg_get_string("network/optim");
138 bool select = xbt_cfg_get_boolean("network/maxmin-selective-update");
140 if (not strcmp(optim, "Full")) {
141 updateMechanism_ = UM_FULL;
142 selectiveUpdate_ = select;
143 } else if (not strcmp(optim, "Lazy")) {
144 updateMechanism_ = UM_LAZY;
145 selectiveUpdate_ = true;
146 xbt_assert(select || (xbt_cfg_is_default_value("network/maxmin-selective-update")),
147 "You cannot disable selective update when using the lazy update mechanism");
149 xbt_die("Unsupported optimization (%s) for this model. Accepted: Full, Lazy.", optim);
152 maxminSystem_ = lmm_system_new(selectiveUpdate_);
153 loopback_ = createLink("__loopback__", 498000000, 0.000015, SURF_LINK_FATPIPE);
155 if (updateMechanism_ == UM_LAZY) {
156 actionHeap_ = xbt_heap_new(8, nullptr);
157 xbt_heap_set_update_callback(actionHeap_, surf_action_lmm_update_index_heap);
158 modifiedSet_ = new ActionLmmList();
159 maxminSystem_->keep_track = modifiedSet_;
162 NetworkCm02Model::NetworkCm02Model(void (*specificSolveFun)(lmm_system_t self))
165 maxminSystem_->solve_fun = specificSolveFun;
168 LinkImpl* NetworkCm02Model::createLink(const char* name, double bandwidth, double latency,
169 e_surf_link_sharing_policy_t policy)
171 return new NetworkCm02Link(this, name, bandwidth, latency, policy, maxminSystem_);
174 void NetworkCm02Model::updateActionsStateLazy(double now, double /*delta*/)
176 while ((xbt_heap_size(actionHeap_) > 0)
177 && (double_equals(xbt_heap_maxkey(actionHeap_), now, sg_surf_precision))) {
179 NetworkCm02Action *action = static_cast<NetworkCm02Action*> (xbt_heap_pop(actionHeap_));
180 XBT_DEBUG("Something happened to action %p", action);
181 if (TRACE_is_enabled()) {
182 int n = lmm_get_number_of_cnst_from_var(maxminSystem_, action->getVariable());
184 for (int i = 0; i < n; i++){
185 lmm_constraint_t constraint = lmm_get_cnst_from_var(maxminSystem_, action->getVariable(), i);
186 NetworkCm02Link *link = static_cast<NetworkCm02Link*>(lmm_constraint_id(constraint));
187 double value = lmm_variable_getvalue(action->getVariable())*
188 lmm_get_cnst_weight_from_var(maxminSystem_, action->getVariable(), i);
189 TRACE_surf_link_set_utilization(link->cname(), action->getCategory(), value, action->getLastUpdate(),
190 now - action->getLastUpdate());
194 // if I am wearing a latency hat
195 if (action->getHat() == LATENCY) {
196 XBT_DEBUG("Latency paid for action %p. Activating", action);
197 lmm_update_variable_weight(maxminSystem_, action->getVariable(), action->weight_);
198 action->heapRemove(actionHeap_);
199 action->refreshLastUpdate();
201 // if I am wearing a max_duration or normal hat
202 } else if (action->getHat() == MAX_DURATION || action->getHat() == NORMAL) {
203 // no need to communicate anymore
204 // assume that flows that reached max_duration have remaining of 0
205 XBT_DEBUG("Action %p finished", action);
206 action->setRemains(0);
208 action->setState(Action::State::done);
209 action->heapRemove(actionHeap_);
215 void NetworkCm02Model::updateActionsStateFull(double now, double delta)
217 ActionList *running_actions = getRunningActionSet();
219 for(ActionList::iterator it(running_actions->begin()), itNext=it, itend(running_actions->end())
220 ; it != itend ; it=itNext) {
223 NetworkCm02Action *action = static_cast<NetworkCm02Action*> (&*it);
224 XBT_DEBUG("Something happened to action %p", action);
225 double deltap = delta;
226 if (action->latency_ > 0) {
227 if (action->latency_ > deltap) {
228 double_update(&(action->latency_), deltap, sg_surf_precision);
231 double_update(&(deltap), action->latency_, sg_surf_precision);
232 action->latency_ = 0.0;
234 if (action->latency_ <= 0.0 && not action->isSuspended())
235 lmm_update_variable_weight(maxminSystem_, action->getVariable(), action->weight_);
237 if (TRACE_is_enabled()) {
238 int n = lmm_get_number_of_cnst_from_var(maxminSystem_, action->getVariable());
239 for (int i = 0; i < n; i++){
240 lmm_constraint_t constraint = lmm_get_cnst_from_var(maxminSystem_, action->getVariable(), i);
242 NetworkCm02Link* link = static_cast<NetworkCm02Link*>(lmm_constraint_id(constraint));
243 TRACE_surf_link_set_utilization(link->cname(), action->getCategory(),
244 (lmm_variable_getvalue(action->getVariable()) *
245 lmm_get_cnst_weight_from_var(maxminSystem_, action->getVariable(), i)),
246 action->getLastUpdate(), now - action->getLastUpdate());
249 if (not lmm_get_number_of_cnst_from_var(maxminSystem_, action->getVariable())) {
250 /* There is actually no link used, hence an infinite bandwidth. This happens often when using models like
251 * vivaldi. In such case, just make sure that the action completes immediately.
253 action->updateRemains(action->getRemains());
255 action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
257 if (action->getMaxDuration() > NO_MAX_DURATION)
258 action->updateMaxDuration(delta);
260 if (((action->getRemains() <= 0) && (lmm_get_variable_weight(action->getVariable()) > 0)) ||
261 ((action->getMaxDuration() > NO_MAX_DURATION) && (action->getMaxDuration() <= 0))) {
263 action->setState(Action::State::done);
268 Action* NetworkCm02Model::communicate(s4u::Host* src, s4u::Host* dst, double size, double rate)
271 double latency = 0.0;
272 std::vector<LinkImpl*>* back_route = nullptr;
273 std::vector<LinkImpl*>* route = new std::vector<LinkImpl*>();
275 XBT_IN("(%s,%s,%g,%g)", src->getCname(), dst->getCname(), size, rate);
277 src->routeTo(dst, route, &latency);
278 xbt_assert(not route->empty() || latency,
279 "You're trying to send data from %s to %s but there is no connecting path between these two hosts.",
280 src->getCname(), dst->getCname());
282 for (auto const& link : *route)
286 if (sg_network_crosstraffic == 1) {
287 back_route = new std::vector<LinkImpl*>();
288 dst->routeTo(src, back_route, nullptr);
289 for (auto const& link : *back_route)
294 NetworkCm02Action *action = new NetworkCm02Action(this, size, failed);
295 action->weight_ = latency;
296 action->latency_ = latency;
297 action->rate_ = rate;
298 if (updateMechanism_ == UM_LAZY) {
299 action->indexHeap_ = -1;
300 action->lastUpdate_ = surf_get_clock();
303 double bandwidth_bound = -1.0;
304 if (sg_weight_S_parameter > 0)
305 for (auto const& link : *route)
306 action->weight_ += sg_weight_S_parameter / link->bandwidth();
308 for (auto const& link : *route) {
309 double bb = bandwidthFactor(size) * link->bandwidth();
310 bandwidth_bound = (bandwidth_bound < 0.0) ? bb : std::min(bandwidth_bound, bb);
313 action->latCurrent_ = action->latency_;
314 action->latency_ *= latencyFactor(size);
315 action->rate_ = bandwidthConstraint(action->rate_, bandwidth_bound, size);
317 int constraints_per_variable = route->size();
318 if (back_route != nullptr)
319 constraints_per_variable += back_route->size();
321 if (action->latency_ > 0) {
322 action->variable_ = lmm_variable_new(maxminSystem_, action, 0.0, -1.0, constraints_per_variable);
323 if (updateMechanism_ == UM_LAZY) {
324 // add to the heap the event when the latency is payed
325 XBT_DEBUG("Added action (%p) one latency event at date %f", action, action->latency_ + action->lastUpdate_);
326 action->heapInsert(actionHeap_, action->latency_ + action->lastUpdate_, route->empty() ? NORMAL : LATENCY);
329 action->variable_ = lmm_variable_new(maxminSystem_, action, 1.0, -1.0, constraints_per_variable);
331 if (action->rate_ < 0) {
332 lmm_update_variable_bound(maxminSystem_, action->getVariable(), (action->latCurrent_ > 0) ? sg_tcp_gamma / (2.0 * action->latCurrent_) : -1.0);
334 lmm_update_variable_bound(maxminSystem_, action->getVariable(), (action->latCurrent_ > 0) ? std::min(action->rate_, sg_tcp_gamma / (2.0 * action->latCurrent_)) : action->rate_);
337 for (auto const& link : *route)
338 lmm_expand(maxminSystem_, link->constraint(), action->getVariable(), 1.0);
340 if (back_route != nullptr) { // sg_network_crosstraffic was activated
341 XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
342 for (auto const& link : *back_route)
343 lmm_expand(maxminSystem_, link->constraint(), action->getVariable(), .05);
345 //Change concurrency_share here, if you want that cross-traffic is included in the SURF concurrency
346 //(You would also have to change lmm_element_concurrency())
347 //lmm_variable_concurrency_share_set(action->getVariable(),2);
354 simgrid::s4u::Link::onCommunicate(action, src, dst);
361 NetworkCm02Link::NetworkCm02Link(NetworkCm02Model* model, const char* name, double bandwidth, double latency,
362 e_surf_link_sharing_policy_t policy, lmm_system_t system)
363 : LinkImpl(model, name, lmm_constraint_new(system, this, sg_bandwidth_factor * bandwidth))
365 bandwidth_.scale = 1.0;
366 bandwidth_.peak = bandwidth;
368 latency_.scale = 1.0;
369 latency_.peak = latency;
371 if (policy == SURF_LINK_FATPIPE)
372 lmm_constraint_shared(constraint());
374 simgrid::s4u::Link::onCreation(this->piface_);
377 void NetworkCm02Link::apply_event(tmgr_trace_event_t triggered, double value)
379 /* Find out which of my iterators was triggered, and react accordingly */
380 if (triggered == bandwidth_.event) {
382 tmgr_trace_event_unref(&bandwidth_.event);
384 } else if (triggered == latency_.event) {
386 tmgr_trace_event_unref(&latency_.event);
388 } else if (triggered == stateEvent_) {
392 lmm_variable_t var = nullptr;
393 lmm_element_t elem = nullptr;
394 double now = surf_get_clock();
397 while ((var = lmm_get_var_from_cnst(model()->getMaxminSystem(), constraint(), &elem))) {
398 Action *action = static_cast<Action*>( lmm_variable_id(var) );
400 if (action->getState() == Action::State::running ||
401 action->getState() == Action::State::ready) {
402 action->setFinishTime(now);
403 action->setState(Action::State::failed);
407 tmgr_trace_event_unref(&stateEvent_);
409 xbt_die("Unknown event!\n");
412 XBT_DEBUG("There was a resource state event, need to update actions related to the constraint (%p)", constraint());
415 void NetworkCm02Link::setBandwidth(double value)
418 bandwidth_.peak = value;
420 lmm_update_constraint_bound(model()->getMaxminSystem(), constraint(),
421 sg_bandwidth_factor * (bandwidth_.peak * bandwidth_.scale));
422 TRACE_surf_link_set_bandwidth(surf_get_clock(), cname(), sg_bandwidth_factor * bandwidth_.peak * bandwidth_.scale);
424 if (sg_weight_S_parameter > 0) {
425 double delta = sg_weight_S_parameter / value - sg_weight_S_parameter / (bandwidth_.peak * bandwidth_.scale);
428 lmm_element_t elem = nullptr;
429 lmm_element_t nextelem = nullptr;
431 while ((var = lmm_get_var_from_cnst_safe(model()->getMaxminSystem(), constraint(), &elem, &nextelem, &numelem))) {
432 NetworkCm02Action *action = static_cast<NetworkCm02Action*>(lmm_variable_id(var));
433 action->weight_ += delta;
434 if (not action->isSuspended())
435 lmm_update_variable_weight(model()->getMaxminSystem(), action->getVariable(), action->weight_);
440 void NetworkCm02Link::setLatency(double value)
442 double delta = value - latency_.peak;
443 lmm_variable_t var = nullptr;
444 lmm_element_t elem = nullptr;
445 lmm_element_t nextelem = nullptr;
448 latency_.peak = value;
450 while ((var = lmm_get_var_from_cnst_safe(model()->getMaxminSystem(), constraint(), &elem, &nextelem, &numelem))) {
451 NetworkCm02Action *action = static_cast<NetworkCm02Action*>(lmm_variable_id(var));
452 action->latCurrent_ += delta;
453 action->weight_ += delta;
454 if (action->rate_ < 0)
455 lmm_update_variable_bound(model()->getMaxminSystem(), action->getVariable(),
456 sg_tcp_gamma / (2.0 * action->latCurrent_));
458 lmm_update_variable_bound(model()->getMaxminSystem(), action->getVariable(),
459 std::min(action->rate_, sg_tcp_gamma / (2.0 * action->latCurrent_)));
461 if (action->rate_ < sg_tcp_gamma / (2.0 * action->latCurrent_)) {
462 XBT_INFO("Flow is limited BYBANDWIDTH");
464 XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f", action->latCurrent_);
467 if (not action->isSuspended())
468 lmm_update_variable_weight(model()->getMaxminSystem(), action->getVariable(), action->weight_);
476 void NetworkCm02Action::updateRemainingLazy(double now)
481 double delta = now - lastUpdate_;
484 XBT_DEBUG("Updating action(%p): remains was %f, last_update was: %f", this, remains_, lastUpdate_);
485 double_update(&(remains_), lastValue_ * delta, sg_maxmin_precision*sg_surf_precision);
487 XBT_DEBUG("Updating action(%p): remains is now %f", this, remains_);
490 if (maxDuration_ > NO_MAX_DURATION)
491 double_update(&maxDuration_, delta, sg_surf_precision);
493 if ((remains_ <= 0 && (lmm_get_variable_weight(getVariable()) > 0)) ||
494 ((maxDuration_ > NO_MAX_DURATION) && (maxDuration_ <= 0))) {
496 setState(Action::State::done);
497 heapRemove(getModel()->getActionHeap());
501 lastValue_ = lmm_variable_getvalue(getVariable());