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 "src/surf/trace_mgr.hpp"
11 #ifndef SURF_MODEL_CPUTI_H_
12 #define SURF_MODEL_CPUTI_H_
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_ti, surf_cpu,
15 "Logging specific to the SURF CPU TRACE INTEGRATION module");
21 void cpu_ti_action_update_index_heap(void *action, int i)
23 ((simgrid::surf::CpuTiAction*)action)->updateIndexHeap(i);
30 CpuTiTrace::CpuTiTrace(tmgr_trace_t speedTrace)
37 timePoints_ = (double*) xbt_malloc0(sizeof(double) *
38 (xbt_dynar_length(speedTrace->event_list) + 1));
39 integral_ = (double*) xbt_malloc0(sizeof(double) *
40 (xbt_dynar_length(speedTrace->event_list) + 1));
41 nbPoints_ = xbt_dynar_length(speedTrace->event_list) + 1;
42 xbt_dynar_foreach(speedTrace->event_list, cpt, val) {
43 timePoints_[i] = time;
44 integral_[i] = integral;
45 integral += val.delta * val.value;
49 timePoints_[i] = time;
50 integral_[i] = integral;
53 CpuTiTrace::~CpuTiTrace()
55 xbt_free(timePoints_);
59 CpuTiTgmr::~CpuTiTgmr()
66 * \brief Integrate trace
68 * Wrapper around surf_cpu_integrate_trace_simple() to get
71 * \param trace Trace structure.
72 * \param a Begin of interval
73 * \param b End of interval
74 * \return the integrate value. -1 if an error occurs.
76 double CpuTiTgmr::integrate(double a, double b)
83 if ((a < 0.0) || (a > b)) {
85 ("Error, invalid integration interval [%.2f,%.2f]. You probably have a task executing with negative computation amount. Check your code.",
92 if (type_ == TRACE_FIXED) {
93 return ((b - a) * value_);
96 if (ceil(a / lastTime_) == a / lastTime_)
97 a_index = 1 + (int) (ceil(a / lastTime_));
99 a_index = (int) (ceil(a / lastTime_));
101 b_index = (int) (floor(b / lastTime_));
103 if (a_index > b_index) { /* Same chunk */
104 return trace_->integrateSimple(a - (a_index -
111 first_chunk = trace_->integrateSimple(a - (a_index -
115 middle_chunk = (b_index - a_index) * total_;
116 last_chunk = trace_->integrateSimple(0.0,
121 XBT_DEBUG("first_chunk=%.2f middle_chunk=%.2f last_chunk=%.2f\n",
122 first_chunk, middle_chunk, last_chunk);
124 return (first_chunk + middle_chunk + last_chunk);
128 * \brief Auxiliary function to compute the integral between a and b.
129 * It simply computes the integrals at point a and b and returns the difference between them.
130 * \param a Initial point
131 * \param b Final point
133 double CpuTiTrace::integrateSimple(double a, double b)
135 return integrateSimplePoint(b) - integrateSimplePoint(a);
139 * \brief Auxiliary function to compute the integral at point a.
142 double CpuTiTrace::integrateSimplePoint(double a)
147 ind = binarySearch(timePoints_, a, 0, nbPoints_ - 1);
148 integral += integral_[ind];
149 XBT_DEBUG("a %f ind %d integral %f ind + 1 %f ind %f time +1 %f time %f",
150 a, ind, integral, integral_[ind + 1], integral_[ind],
151 timePoints_[ind + 1], timePoints_[ind]);
152 double_update(&a_aux, timePoints_[ind], sg_maxmin_precision*sg_surf_precision);
154 integral +=((integral_[ind + 1] -
155 integral_[ind]) / (timePoints_[ind + 1] - timePoints_[ind])) * (a - timePoints_[ind]);
156 XBT_DEBUG("Integral a %f = %f", a, integral);
162 * \brief Computes the time needed to execute "amount" on cpu.
164 * Here, amount can span multiple trace periods
166 * \param a Initial time
167 * \param amount Amount to be executed
170 double CpuTiTgmr::solve(double a, double amount)
174 double reduced_amount;
178 /* Fix very small negative numbers */
179 if ((a < 0.0) && (a > -EPSILON)) {
182 if ((amount < 0.0) && (amount > -EPSILON)) {
187 if ((a < 0.0) || (amount < 0.0)) {
189 ("Error, invalid parameters [a = %.2f, amount = %.2f]. You probably have a task executing with negative computation amount. Check your code.",
194 /* At this point, a and amount are positive */
196 if (amount < EPSILON)
199 /* Is the trace fixed ? */
200 if (type_ == TRACE_FIXED) {
201 return (a + (amount / value_));
204 XBT_DEBUG("amount %f total %f", amount, total_);
205 /* Reduce the problem to one where amount <= trace_total */
206 quotient = (int) (floor(amount / total_));
207 reduced_amount = (total_) * ((amount / total_) -
208 floor(amount / total_));
209 reduced_a = a - (lastTime_) * (int) (floor(a / lastTime_));
211 XBT_DEBUG("Quotient: %d reduced_amount: %f reduced_a: %f", quotient,
212 reduced_amount, reduced_a);
214 /* Now solve for new_amount which is <= trace_total */
216 fprintf(stderr,"reduced_a = %.2f\n",reduced_a);
217 fprintf(stderr,"reduced_amount = %.2f\n",reduced_amount);
219 reduced_b = solveSomewhatSimple(reduced_a, reduced_amount);
221 /* Re-map to the original b and amount */
222 b = (lastTime_) * (int) (floor(a / lastTime_)) +
223 (quotient * lastTime_) + reduced_b;
228 * \brief Auxiliary function to solve integral
230 * Here, amount is <= trace->total
231 * and a <=trace->last_time
234 double CpuTiTgmr::solveSomewhatSimple(double a, double amount)
236 double amount_till_end;
239 XBT_DEBUG("Solve integral: [%.2f, amount=%.2f]", a, amount);
240 amount_till_end = integrate(a, lastTime_);
242 fprintf(stderr,"amount_till_end=%.2f\n",amount_till_end);
245 if (amount_till_end > amount) {
246 b = trace_->solveSimple(a, amount);
248 b = lastTime_ + trace_->solveSimple(0.0, amount - amount_till_end);
254 * \brief Auxiliary function to solve integral.
255 * It returns the date when the requested amount of flops is available
256 * \param trace Trace structure
257 * \param a Initial point
258 * \param amount Amount of flops
259 * \return The date when amount is available.
261 double CpuTiTrace::solveSimple(double a, double amount)
266 integral_a = integrateSimplePoint(a);
267 ind = binarySearch(integral_, integral_a + amount, 0, nbPoints_ - 1);
268 time = timePoints_[ind];
270 (integral_a + amount -
271 integral_[ind]) / ((integral_[ind + 1] -
273 (timePoints_[ind + 1] -
280 * \brief Auxiliary function to update the CPU speed scale.
282 * This function uses the trace structure to return the speed scale at the determined time a.
283 * \param trace Trace structure to search the updated speed scale
285 * \return CPU speed scale
287 double CpuTiTgmr::getPowerScale(double a)
293 reduced_a = a - floor(a / lastTime_) * lastTime_;
294 point = trace_->binarySearch(trace_->timePoints_, reduced_a, 0,
295 trace_->nbPoints_ - 1);
296 xbt_dynar_get_cpy(speedTrace_->event_list, point, &val);
301 * \brief Creates a new integration trace from a tmgr_trace_t
303 * \param speedTrace CPU availability trace
304 * \param value Percentage of CPU speed available (useful to fixed tracing)
305 * \param spacing Initial spacing
306 * \return Integration trace structure
308 CpuTiTgmr::CpuTiTgmr(tmgr_trace_t speedTrace, double value)
310 double total_time = 0.0;
315 /* no availability file, fixed trace */
319 XBT_DEBUG("No availability trace. Constant value = %f", value);
323 /* only one point available, fixed trace */
324 if (xbt_dynar_length(speedTrace->event_list) == 1) {
325 xbt_dynar_get_cpy(speedTrace->event_list, 0, &val);
331 type_ = TRACE_DYNAMIC;
332 speedTrace_ = speedTrace;
334 /* count the total time of trace file */
335 xbt_dynar_foreach(speedTrace->event_list, cpt, val) {
336 total_time += val.delta;
338 trace_ = new CpuTiTrace(speedTrace);
339 lastTime_ = total_time;
340 total_ = trace_->integrateSimple(0, total_time);
342 XBT_DEBUG("Total integral %f, last_time %f ",
347 * \brief Binary search in array.
348 * It returns the first point of the interval in which "a" is.
350 * \param a Value to search
351 * \param low Low bound to search in array
352 * \param high Upper bound to search in array
353 * \return Index of point
355 int CpuTiTrace::binarySearch(double *array, double a, int low, int high)
357 xbt_assert(low < high, "Wrong parameters: low (%d) should be smaller than"
358 " high (%d)", low, high);
362 mid = low + (high - low) / 2;
363 XBT_DEBUG("a %f low %d high %d mid %d value %f", a, low, high, mid,
371 while (low < high - 1);
383 void surf_cpu_model_init_ti()
385 xbt_assert(!surf_cpu_model_pm,"CPU model already initialized. This should not happen.");
386 xbt_assert(!surf_cpu_model_vm,"CPU model already initialized. This should not happen.");
388 surf_cpu_model_pm = new simgrid::surf::CpuTiModel();
389 xbt_dynar_push(all_existing_models, &surf_cpu_model_pm);
391 surf_cpu_model_vm = new simgrid::surf::CpuTiModel();
392 xbt_dynar_push(all_existing_models, &surf_cpu_model_vm);
398 CpuTiModel::CpuTiModel() : CpuModel()
400 runningActionSetThatDoesNotNeedBeingChecked_ = new ActionList();
402 modifiedCpu_ = new CpuTiList();
404 tiActionHeap_ = xbt_heap_new(8, NULL);
405 xbt_heap_set_update_callback(tiActionHeap_,
406 cpu_ti_action_update_index_heap);
409 CpuTiModel::~CpuTiModel()
411 surf_cpu_model_pm = NULL;
412 delete runningActionSetThatDoesNotNeedBeingChecked_;
414 xbt_heap_free(tiActionHeap_);
417 Cpu *CpuTiModel::createCpu(simgrid::s4u::Host *host, xbt_dynar_t speedPerPstate, int core)
419 return new CpuTi(this, host, speedPerPstate, core);
422 double CpuTiModel::next_occuring_event(double now)
424 double min_action_duration = -1;
426 /* iterates over modified cpus to update share resources */
427 for(CpuTiList::iterator it(modifiedCpu_->begin()), itend(modifiedCpu_->end())
431 ti->updateActionsFinishTime(now);
434 /* get the min next event if heap not empty */
435 if (xbt_heap_size(tiActionHeap_) > 0)
436 min_action_duration = xbt_heap_maxkey(tiActionHeap_) - now;
438 XBT_DEBUG("Share resources, min next event date: %f", min_action_duration);
440 return min_action_duration;
443 void CpuTiModel::updateActionsState(double now, double /*delta*/)
445 while ((xbt_heap_size(tiActionHeap_) > 0)
446 && (xbt_heap_maxkey(tiActionHeap_) <= now)) {
447 CpuTiAction *action = (CpuTiAction*) xbt_heap_pop(tiActionHeap_);
448 XBT_DEBUG("Action %p: finish", action);
450 /* set the remains to 0 due to precision problems when updating the remaining amount */
451 action->setRemains(0);
452 action->setState(Action::State::done);
453 /* update remaining amount of all actions */
454 action->cpu_->updateRemainingAmount(surf_get_clock());
461 CpuTi::CpuTi(CpuTiModel *model, simgrid::s4u::Host *host, xbt_dynar_t speedPerPstate, int core)
462 : Cpu(model, host, speedPerPstate, core)
464 xbt_assert(core==1,"Multi-core not handled by this model yet");
467 actionSet_ = new ActionTiList();
469 xbt_dynar_get_cpy(speedPerPstate, 0, &speed_.peak);
470 XBT_DEBUG("CPU create: peak=%f", speed_.peak);
472 speedIntegratedTrace_ = new CpuTiTgmr(NULL, 1/*scale*/);
478 delete speedIntegratedTrace_;
481 void CpuTi::setSpeedTrace(tmgr_trace_t trace)
483 if (speedIntegratedTrace_)
484 delete speedIntegratedTrace_;
486 speedIntegratedTrace_ = new CpuTiTgmr(trace, speed_.scale);
488 /* add a fake trace event if periodicity == 0 */
489 if (trace && xbt_dynar_length(trace->event_list) > 1) {
491 xbt_dynar_get_cpy(trace->event_list, xbt_dynar_length(trace->event_list) - 1, &val);
493 speed_.event = future_evt_set->add_trace(tmgr_empty_trace_new(), 0.0, this);
497 void CpuTi::apply_event(tmgr_trace_iterator_t event, double value)
499 if (event == speed_.event) {
500 tmgr_trace_t speedTrace;
504 XBT_DEBUG("Finish trace date: value %f", value);
505 /* update remaining of actions and put in modified cpu swag */
506 updateRemainingAmount(surf_get_clock());
510 speedTrace = speedIntegratedTrace_->speedTrace_;
511 xbt_dynar_get_cpy(speedTrace->event_list, xbt_dynar_length(speedTrace->event_list) - 1, &val);
512 delete speedIntegratedTrace_;
513 speed_.scale = val.value;
515 trace = new CpuTiTgmr(TRACE_FIXED, val.value);
516 XBT_DEBUG("value %f", val.value);
518 speedIntegratedTrace_ = trace;
520 tmgr_trace_event_unref(&speed_.event);
522 } else if (event == stateEvent_) {
525 xbt_dynar_push_as(host_that_restart, char*, (char *)getName());
529 double date = surf_get_clock();
531 /* put all action running on cpu to failed */
532 for(ActionTiList::iterator it(actionSet_->begin()), itend(actionSet_->end())
533 ; it != itend ; ++it) {
535 CpuTiAction *action = &*it;
536 if (action->getState() == Action::State::running
537 || action->getState() == Action::State::ready
538 || action->getState() == Action::State::not_in_the_system) {
539 action->setFinishTime(date);
540 action->setState(Action::State::failed);
541 if (action->indexHeap_ >= 0) {
542 CpuTiAction *heap_act = (CpuTiAction*)
543 xbt_heap_remove(static_cast<CpuTiModel*>(getModel())->tiActionHeap_, action->indexHeap_);
544 if (heap_act != action)
550 tmgr_trace_event_unref(&stateEvent_);
553 xbt_die("Unknown event!\n");
557 void CpuTi::updateActionsFinishTime(double now)
560 double sum_priority = 0.0, total_area, min_finish = -1;
562 /* update remaining amount of actions */
563 updateRemainingAmount(now);
565 for(ActionTiList::iterator it(actionSet_->begin()), itend(actionSet_->end()) ; it != itend ; ++it) {
567 /* action not running, skip it */
568 if (action->getStateSet() != surf_cpu_model_pm->getRunningActionSet())
571 /* bogus priority, skip it */
572 if (action->getPriority() <= 0)
575 /* action suspended, skip it */
576 if (action->suspended_ != 0)
579 sum_priority += 1.0 / action->getPriority();
581 sumPriority_ = sum_priority;
583 for(ActionTiList::iterator it(actionSet_->begin()), itend(actionSet_->end()) ; it != itend ; ++it) {
586 /* action not running, skip it */
587 if (action->getStateSet() !=
588 surf_cpu_model_pm->getRunningActionSet())
591 /* verify if the action is really running on cpu */
592 if (action->suspended_ == 0 && action->getPriority() > 0) {
593 /* total area needed to finish the action. Used in trace integration */
595 (action->getRemains()) * sum_priority *
596 action->getPriority();
598 total_area /= speed_.peak;
600 action->setFinishTime(speedIntegratedTrace_->solve(now, total_area));
601 /* verify which event will happen before (max_duration or finish time) */
602 if (action->getMaxDuration() != NO_MAX_DURATION &&
603 action->getStartTime() + action->getMaxDuration() < action->finishTime_)
604 min_finish = action->getStartTime() + action->getMaxDuration();
606 min_finish = action->finishTime_;
608 /* put the max duration time on heap */
609 if (action->getMaxDuration() != NO_MAX_DURATION)
610 min_finish = action->getStartTime() + action->getMaxDuration();
612 /* add in action heap */
613 XBT_DEBUG("action(%p) index %d", action, action->indexHeap_);
614 if (action->indexHeap_ >= 0) {
615 CpuTiAction *heap_act = (CpuTiAction*)
616 xbt_heap_remove(static_cast<CpuTiModel*>(getModel())->tiActionHeap_, action->indexHeap_);
617 if (heap_act != action)
620 if (min_finish != NO_MAX_DURATION)
621 xbt_heap_push(static_cast<CpuTiModel*>(getModel())->tiActionHeap_, action, min_finish);
624 ("Update finish time: Cpu(%s) Action: %p, Start Time: %f Finish Time: %f Max duration %f",
625 getName(), action, action->getStartTime(),
627 action->getMaxDuration());
629 /* remove from modified cpu */
635 return !actionSet_->empty();
638 double CpuTi::getAvailableSpeed()
640 speed_.scale = speedIntegratedTrace_->getPowerScale(surf_get_clock());
641 return Cpu::getAvailableSpeed();
644 /** @brief Update the remaining amount of actions */
645 void CpuTi::updateRemainingAmount(double now)
648 /* already updated */
649 if (lastUpdate_ >= now)
652 /* compute the integration area */
653 double area_total = speedIntegratedTrace_->integrate(lastUpdate_, now) * speed_.peak;
654 XBT_DEBUG("Flops total: %f, Last update %f", area_total, lastUpdate_);
656 for(ActionTiList::iterator it(actionSet_->begin()), itend(actionSet_->end()) ; it != itend ; ++it) {
657 CpuTiAction *action = &*it;
658 /* action not running, skip it */
659 if (action->getStateSet() != getModel()->getRunningActionSet())
662 /* bogus priority, skip it */
663 if (action->getPriority() <= 0)
666 /* action suspended, skip it */
667 if (action->suspended_ != 0)
670 /* action don't need update */
671 if (action->getStartTime() >= now)
674 /* skip action that are finishing now */
675 if (action->finishTime_ >= 0 && action->finishTime_ <= now)
678 /* update remaining */
679 action->updateRemains(area_total / (sumPriority_ * action->getPriority()));
680 XBT_DEBUG("Update remaining action(%p) remaining %f", action, action->remains_);
685 CpuAction *CpuTi::execution_start(double size)
687 XBT_IN("(%s,%g)", getName(), size);
688 CpuTiAction *action = new CpuTiAction(static_cast<CpuTiModel*>(getModel()), size, isOff(), this);
690 actionSet_->push_back(*action);
697 CpuAction *CpuTi::sleep(double duration)
700 duration = MAX(duration, sg_surf_precision);
702 XBT_IN("(%s,%g)", getName(), duration);
703 CpuTiAction *action = new CpuTiAction(static_cast<CpuTiModel*>(getModel()), 1.0, isOff(), this);
705 action->maxDuration_ = duration;
706 action->suspended_ = 2;
707 if (duration == NO_MAX_DURATION) {
708 /* Move to the *end* of the corresponding action set. This convention
709 is used to speed up update_resource_state */
710 action->getStateSet()->erase(action->getStateSet()->iterator_to(*action));
711 action->stateSet_ = static_cast<CpuTiModel*>(getModel())->runningActionSetThatDoesNotNeedBeingChecked_;
712 action->getStateSet()->push_back(*action);
715 actionSet_->push_back(*action);
721 void CpuTi::modified(bool modified){
722 CpuTiList *modifiedCpu = static_cast<CpuTiModel*>(getModel())->modifiedCpu_;
724 if (!cpu_ti_hook.is_linked()) {
725 modifiedCpu->push_back(*this);
728 if (cpu_ti_hook.is_linked()) {
729 modifiedCpu->erase(modifiedCpu->iterator_to(*this));
738 CpuTiAction::CpuTiAction(CpuTiModel *model_, double cost, bool failed, CpuTi *cpu)
739 : CpuAction(model_, cost, failed)
743 cpu_->modified(true);
746 void CpuTiAction::updateIndexHeap(int i)
751 void CpuTiAction::setState(Action::State state)
753 CpuAction::setState(state);
754 cpu_->modified(true);
757 int CpuTiAction::unref()
761 if (action_hook.is_linked())
762 getStateSet()->erase(getStateSet()->iterator_to(*this));
763 /* remove from action_set */
764 if (action_ti_hook.is_linked())
765 cpu_->actionSet_->erase(cpu_->actionSet_->iterator_to(*this));
766 /* remove from heap */
767 xbt_heap_remove(static_cast<CpuTiModel*>(getModel())->tiActionHeap_, this->indexHeap_);
768 cpu_->modified(true);
775 void CpuTiAction::cancel()
777 this->setState(Action::State::failed);
778 xbt_heap_remove(getModel()->getActionHeap(), this->indexHeap_);
779 cpu_->modified(true);
783 void CpuTiAction::suspend()
785 XBT_IN("(%p)", this);
786 if (suspended_ != 2) {
788 xbt_heap_remove(getModel()->getActionHeap(), indexHeap_);
789 cpu_->modified(true);
794 void CpuTiAction::resume()
796 XBT_IN("(%p)", this);
797 if (suspended_ != 2) {
799 cpu_->modified(true);
804 void CpuTiAction::setMaxDuration(double duration)
808 XBT_IN("(%p,%g)", this, duration);
810 maxDuration_ = duration;
813 min_finish = (getStartTime() + getMaxDuration()) < getFinishTime() ?
814 (getStartTime() + getMaxDuration()) : getFinishTime();
816 min_finish = getFinishTime();
818 /* add in action heap */
819 if (indexHeap_ >= 0) {
820 CpuTiAction *heap_act = (CpuTiAction*)
821 xbt_heap_remove(getModel()->getActionHeap(), indexHeap_);
822 if (heap_act != this)
825 xbt_heap_push(getModel()->getActionHeap(), this, min_finish);
830 void CpuTiAction::setPriority(double priority)
832 XBT_IN("(%p,%g)", this, priority);
833 priority_ = priority;
834 cpu_->modified(true);
838 double CpuTiAction::getRemains()
840 XBT_IN("(%p)", this);
841 cpu_->updateRemainingAmount(surf_get_clock());
849 #endif /* SURF_MODEL_CPUTI_H_ */