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. */
8 #include "cpu_interface.hpp"
9 #include "plugins/energy.hpp"
11 XBT_LOG_EXTERNAL_CATEGORY(surf_kernel);
12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu, surf,
13 "Logging specific to the SURF cpu module");
15 int autoload_surf_cpu_model = 1;
16 void_f_void_t surf_cpu_model_init_preparse = NULL;
18 simgrid::surf::CpuModel *surf_cpu_model_pm;
19 simgrid::surf::CpuModel *surf_cpu_model_vm;
24 simgrid::xbt::Extension<simgrid::Host, Cpu> Cpu::EXTENSION_ID;
28 if (!EXTENSION_ID.valid())
29 EXTENSION_ID = simgrid::Host::extension_create<simgrid::surf::Cpu>();
36 Cpu *getActionCpu(CpuAction *action) {
37 return static_cast<Cpu*>(lmm_constraint_id(lmm_get_cnst_from_var
38 (action->getModel()->getMaxminSystem(),
39 action->getVariable(), 0)));
42 simgrid::surf::signal<void(CpuAction*, e_surf_action_state_t, e_surf_action_state_t)> cpuActionStateChangedCallbacks;
44 void cpu_add_traces(){
45 surf_cpu_model_pm->addTraces();
52 void CpuModel::updateActionsStateLazy(double now, double /*delta*/)
55 while ((xbt_heap_size(getActionHeap()) > 0)
56 && (double_equals(xbt_heap_maxkey(getActionHeap()), now, sg_surf_precision))) {
57 action = static_cast<CpuAction*>(xbt_heap_pop(getActionHeap()));
58 XBT_CDEBUG(surf_kernel, "Something happened to action %p", action);
59 if (TRACE_is_enabled()) {
60 Cpu *cpu = static_cast<Cpu*>(lmm_constraint_id(lmm_get_cnst_from_var(getMaxminSystem(), action->getVariable(), 0)));
61 TRACE_surf_host_set_utilization(cpu->getName(), action->getCategory(),
62 lmm_variable_getvalue(action->getVariable()),
63 action->getLastUpdate(),
64 now - action->getLastUpdate());
68 XBT_CDEBUG(surf_kernel, "Action %p finished", action);
70 /* set the remains to 0 due to precision problems when updating the remaining amount */
71 action->setRemains(0);
72 action->setState(SURF_ACTION_DONE);
73 action->heapRemove(getActionHeap()); //FIXME: strange call since action was already popped
75 if (TRACE_is_enabled()) {
76 //defining the last timestamp that we can safely dump to trace file
77 //without losing the event ascending order (considering all CPU's)
79 ActionList *actionSet = getRunningActionSet();
80 for(ActionList::iterator it(actionSet->begin()), itend(actionSet->end())
81 ; it != itend ; ++it) {
82 action = static_cast<CpuAction*>(&*it);
84 smaller = action->getLastUpdate();
87 if (action->getLastUpdate() < smaller) {
88 smaller = action->getLastUpdate();
92 TRACE_last_timestamp_to_dump = smaller;
98 void CpuModel::updateActionsStateFull(double now, double delta)
100 CpuAction *action = NULL;
101 ActionList *running_actions = getRunningActionSet();
103 for(ActionList::iterator it(running_actions->begin()), itNext=it, itend(running_actions->end())
104 ; it != itend ; it=itNext) {
106 action = static_cast<CpuAction*>(&*it);
107 if (TRACE_is_enabled()) {
108 Cpu *x = static_cast<Cpu*> (lmm_constraint_id(lmm_get_cnst_from_var(getMaxminSystem(), action->getVariable(), 0)) );
110 TRACE_surf_host_set_utilization(x->getName(),
111 action->getCategory(),
112 lmm_variable_getvalue(action->getVariable()),
115 TRACE_last_timestamp_to_dump = now - delta;
118 action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
121 if (action->getMaxDuration() != NO_MAX_DURATION)
122 action->updateMaxDuration(delta);
125 if ((action->getRemainsNoUpdate() <= 0) &&
126 (lmm_get_variable_weight(action->getVariable()) > 0)) {
128 action->setState(SURF_ACTION_DONE);
129 } else if ((action->getMaxDuration() != NO_MAX_DURATION) &&
130 (action->getMaxDuration() <= 0)) {
132 action->setState(SURF_ACTION_DONE);
147 Cpu::Cpu(Model *model, simgrid::Host *host,
148 xbt_dynar_t speedPeakList, int pstate,
149 int core, double speedPeak, double speedScale,
150 e_surf_resource_state_t stateInitial)
151 : Resource(model, host->getName().c_str(), stateInitial)
153 , m_speedPeak(speedPeak)
154 , m_speedScale(speedScale)
157 host->extension_set(Cpu::EXTENSION_ID, this);
159 // Copy the power peak array:
160 p_speedPeakList = xbt_dynar_new(sizeof(double), nullptr);
161 unsigned long n = xbt_dynar_length(speedPeakList);
162 for (unsigned long i = 0; i != n; ++i) {
163 double value = xbt_dynar_get_as(speedPeakList, i, double);
164 xbt_dynar_push(p_speedPeakList, &value);
170 Cpu::Cpu(Model *model, simgrid::Host *host, lmm_constraint_t constraint,
171 xbt_dynar_t speedPeakList, int pstate,
172 int core, double speedPeak,
173 double speedScale, e_surf_resource_state_t stateInitial)
174 : Resource(model, host->getName().c_str(), constraint, stateInitial)
176 , m_speedPeak(speedPeak)
177 , m_speedScale(speedScale)
180 host->extension_set(Cpu::EXTENSION_ID, this);
182 // Copy the power peak array:
183 p_speedPeakList = xbt_dynar_new(sizeof(double), nullptr);
184 unsigned long n = xbt_dynar_length(speedPeakList);
185 for (unsigned long i = 0; i != n; ++i) {
186 double value = xbt_dynar_get_as(speedPeakList, i, double);
187 xbt_dynar_push(p_speedPeakList, &value);
192 /* Currently, we assume that a VM does not have a multicore CPU. */
194 xbt_assert(model == surf_cpu_model_pm);
196 if (model->getUpdateMechanism() != UM_UNDEFINED) {
197 p_constraintCore = xbt_new(lmm_constraint_t, core);
198 p_constraintCoreId = xbt_new(void*, core);
201 for (i = 0; i < core; i++) {
202 /* just for a unique id, never used as a string. */
203 p_constraintCoreId[i] = bprintf("%s:%i", host->getName().c_str(), i);
204 p_constraintCore[i] = lmm_constraint_new(model->getMaxminSystem(), p_constraintCoreId[i], m_speedScale * m_speedPeak);
209 Cpu::Cpu(Model *model, simgrid::Host *host, lmm_constraint_t constraint,
210 xbt_dynar_t speedPeakList, int pstate,
211 int core, double speedPeak, double speedScale)
212 : Cpu(model, host, constraint, speedPeakList, pstate, core, speedPeak, speedScale, SURF_RESOURCE_ON)
214 xbt_assert(0,"FIXME: this constructor could be removed");
217 Cpu::Cpu(Model *model, simgrid::Host *host,
218 xbt_dynar_t speedPeakList, int pstate,
219 int core, double speedPeak, double speedScale)
220 : Cpu(model, host, speedPeakList, pstate, core, speedPeak, speedScale, SURF_RESOURCE_ON)
225 if (p_constraintCoreId){
226 for (int i = 0; i < m_core; i++) {
227 xbt_free(p_constraintCoreId[i]);
229 xbt_free(p_constraintCore);
231 if (p_constraintCoreId)
232 xbt_free(p_constraintCoreId);
235 double Cpu::getCurrentPowerPeak()
240 int Cpu::getNbPStates()
242 return xbt_dynar_length(p_speedPeakList);
245 void Cpu::setPState(int pstate_index)
247 xbt_dynar_t plist = p_speedPeakList;
248 xbt_assert(pstate_index <= (int)xbt_dynar_length(plist),
249 "Invalid parameters for CPU %s (pstate %d > length of pstates %d)", getName(), pstate_index, (int)xbt_dynar_length(plist));
251 double new_peak_speed = xbt_dynar_get_as(plist, pstate_index, double);
252 m_pstate = pstate_index;
253 m_speedPeak = new_peak_speed;
261 double Cpu::getPowerPeakAt(int pstate_index)
263 xbt_dynar_t plist = p_speedPeakList;
264 xbt_assert((pstate_index <= (int)xbt_dynar_length(plist)), "Invalid parameters (pstate index out of bounds)");
266 return xbt_dynar_get_as(plist, pstate_index, double);
269 double Cpu::getSpeed(double load)
271 return load * m_speedPeak;
274 double Cpu::getAvailableSpeed()
276 /* number between 0 and 1 */
289 void CpuAction::updateRemainingLazy(double now)
293 xbt_assert(getStateSet() == getModel()->getRunningActionSet(),
294 "You're updating an action that is not running.");
296 /* bogus priority, skip it */
297 xbt_assert(getPriority() > 0,
298 "You're updating an action that seems suspended.");
300 delta = now - m_lastUpdate;
303 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains was %f, last_update was: %f", this, m_remains, m_lastUpdate);
304 double_update(&(m_remains), m_lastValue * delta, sg_maxmin_precision*sg_surf_precision);
306 if (TRACE_is_enabled()) {
307 Cpu *cpu = static_cast<Cpu*>(lmm_constraint_id(lmm_get_cnst_from_var(getModel()->getMaxminSystem(), getVariable(), 0)));
308 TRACE_surf_host_set_utilization(cpu->getName(), getCategory(), m_lastValue, m_lastUpdate, now - m_lastUpdate);
310 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains is now %f", this, m_remains);
314 m_lastValue = lmm_variable_getvalue(getVariable());
319 * This function formulates a constraint problem that pins a given task to
320 * particular cores. Currently, it is possible to pin a task to an exactly one
321 * specific core. The system links the variable object of the task to the
322 * per-core constraint object.
324 * But, the taskset command on Linux takes a mask value specifying a CPU
325 * affinity setting of a given task. If the mask value is 0x03, the given task
326 * will be executed on the first core (CPU0) or the second core (CPU1) on the
327 * given PM. The schedular will determine appropriate placements of tasks,
328 * considering given CPU affinities and task activities.
330 * How should the system formulate constraint problems for an affinity to
333 * The cpu argument must be the host where the task is being executed. The
334 * action object does not have the information about the location where the
335 * action is being executed.
337 void CpuAction::setAffinity(Cpu *cpu, unsigned long mask)
339 lmm_variable_t var_obj = getVariable();
340 XBT_IN("(%p,%lx)", this, mask);
343 unsigned long nbits = 0;
345 /* FIXME: There is much faster algorithms doing this. */
346 for (int i = 0; i < cpu->m_core; i++) {
347 unsigned long has_affinity = (1UL << i) & mask;
353 XBT_CRITICAL("Do not specify multiple cores for an affinity mask.");
354 XBT_CRITICAL("See the comment in cpu_action_set_affinity().");
359 for (int i = 0; i < cpu->m_core; i++) {
360 XBT_DEBUG("clear affinity %p to cpu-%d@%s", this, i, cpu->getName());
361 lmm_shrink(cpu->getModel()->getMaxminSystem(), cpu->p_constraintCore[i], var_obj);
363 unsigned long has_affinity = (1UL << i) & mask;
365 /* This function only accepts an affinity setting on the host where the
366 * task is now running. In future, a task might move to another host.
367 * But, at this moment, this function cannot take an affinity setting on
370 * It might be possible to extend the code to allow this function to
371 * accept affinity settings on a future host. We might be able to assign
372 * zero to elem->value to maintain such inactive affinity settings in the
373 * system. But, this will make the system complex. */
374 XBT_DEBUG("set affinity %p to cpu-%d@%s", this, i, cpu->getName());
375 lmm_expand(cpu->getModel()->getMaxminSystem(), cpu->p_constraintCore[i], var_obj, 1.0);
379 if (cpu->getModel()->getUpdateMechanism() == UM_LAZY) {
380 /* FIXME (hypervisor): Do we need to do something for the LAZY mode? */
385 simgrid::surf::signal<void(simgrid::surf::CpuAction*, e_surf_action_state_t, e_surf_action_state_t)> CpuAction::onStateChange;
387 void CpuAction::setState(e_surf_action_state_t state){
388 e_surf_action_state_t old = getState();
389 Action::setState(state);
390 onStateChange(this, old, state);