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. */
7 #include "cpu_interface.hpp"
8 #include "plugins/energy.hpp"
10 XBT_LOG_EXTERNAL_CATEGORY(surf_kernel);
11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu, surf,
12 "Logging specific to the SURF cpu module");
14 int autoload_surf_cpu_model = 1;
15 void_f_void_t surf_cpu_model_init_preparse = NULL;
17 simgrid::surf::CpuModel *surf_cpu_model_pm;
18 simgrid::surf::CpuModel *surf_cpu_model_vm;
27 Cpu *getActionCpu(CpuAction *action) {
28 return static_cast<Cpu*>(lmm_constraint_id(lmm_get_cnst_from_var
29 (action->getModel()->getMaxminSystem(),
30 action->getVariable(), 0)));
33 surf_callback(void, Cpu*) cpuCreatedCallbacks;
34 surf_callback(void, Cpu*) cpuDestructedCallbacks;
35 surf_callback(void, Cpu*, e_surf_resource_state_t, e_surf_resource_state_t) cpuStateChangedCallbacks;
36 surf_callback(void, CpuAction*, e_surf_action_state_t, e_surf_action_state_t) cpuActionStateChangedCallbacks;
37 void cpu_add_traces(){
38 surf_cpu_model_pm->addTraces();
45 void CpuModel::updateActionsStateLazy(double now, double /*delta*/)
48 while ((xbt_heap_size(getActionHeap()) > 0)
49 && (double_equals(xbt_heap_maxkey(getActionHeap()), now, sg_surf_precision))) {
50 action = static_cast<CpuAction*>(xbt_heap_pop(getActionHeap()));
51 XBT_CDEBUG(surf_kernel, "Something happened to action %p", action);
52 if (TRACE_is_enabled()) {
53 Cpu *cpu = static_cast<Cpu*>(lmm_constraint_id(lmm_get_cnst_from_var(getMaxminSystem(), action->getVariable(), 0)));
54 TRACE_surf_host_set_utilization(cpu->getName(), action->getCategory(),
55 lmm_variable_getvalue(action->getVariable()),
56 action->getLastUpdate(),
57 now - action->getLastUpdate());
61 XBT_CDEBUG(surf_kernel, "Action %p finished", action);
63 /* set the remains to 0 due to precision problems when updating the remaining amount */
64 action->setRemains(0);
65 action->setState(SURF_ACTION_DONE);
66 action->heapRemove(getActionHeap()); //FIXME: strange call since action was already popped
68 if (TRACE_is_enabled()) {
69 //defining the last timestamp that we can safely dump to trace file
70 //without losing the event ascending order (considering all CPU's)
72 ActionList *actionSet = getRunningActionSet();
73 for(ActionList::iterator it(actionSet->begin()), itend(actionSet->end())
74 ; it != itend ; ++it) {
75 action = static_cast<CpuAction*>(&*it);
77 smaller = action->getLastUpdate();
80 if (action->getLastUpdate() < smaller) {
81 smaller = action->getLastUpdate();
85 TRACE_last_timestamp_to_dump = smaller;
91 void CpuModel::updateActionsStateFull(double now, double delta)
93 CpuAction *action = NULL;
94 ActionList *running_actions = getRunningActionSet();
96 for(ActionList::iterator it(running_actions->begin()), itNext=it, itend(running_actions->end())
97 ; it != itend ; it=itNext) {
99 action = static_cast<CpuAction*>(&*it);
100 if (TRACE_is_enabled()) {
101 Cpu *x = static_cast<Cpu*> (lmm_constraint_id(lmm_get_cnst_from_var(getMaxminSystem(), action->getVariable(), 0)) );
103 TRACE_surf_host_set_utilization(x->getName(),
104 action->getCategory(),
105 lmm_variable_getvalue(action->getVariable()),
108 TRACE_last_timestamp_to_dump = now - delta;
111 action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
114 if (action->getMaxDuration() != NO_MAX_DURATION)
115 action->updateMaxDuration(delta);
118 if ((action->getRemainsNoUpdate() <= 0) &&
119 (lmm_get_variable_weight(action->getVariable()) > 0)) {
121 action->setState(SURF_ACTION_DONE);
122 } else if ((action->getMaxDuration() != NO_MAX_DURATION) &&
123 (action->getMaxDuration() <= 0)) {
125 action->setState(SURF_ACTION_DONE);
140 Cpu::Cpu(Model *model, const char *name, xbt_dict_t props,
141 int core, double speedPeak, double speedScale,
142 e_surf_resource_state_t stateInitial)
143 : Resource(model, name, props, stateInitial)
145 , m_speedPeak(speedPeak)
146 , m_speedScale(speedScale)
151 Cpu::Cpu(Model *model, const char *name, xbt_dict_t props,
152 lmm_constraint_t constraint, int core, double speedPeak,
153 double speedScale, e_surf_resource_state_t stateInitial)
154 : Resource(model, name, props, constraint, stateInitial)
156 , m_speedPeak(speedPeak)
157 , m_speedScale(speedScale)
159 /* At now, we assume that a VM does not have a multicore CPU. */
161 xbt_assert(model == surf_cpu_model_pm);
163 if (model->getUpdateMechanism() != UM_UNDEFINED) {
164 p_constraintCore = xbt_new(lmm_constraint_t, core);
165 p_constraintCoreId = xbt_new(void*, core);
168 for (i = 0; i < core; i++) {
169 /* just for a unique id, never used as a string. */
170 p_constraintCoreId[i] = bprintf("%s:%i", name, i);
171 p_constraintCore[i] = lmm_constraint_new(model->getMaxminSystem(), p_constraintCoreId[i], m_speedScale * m_speedPeak);
176 Cpu::Cpu(Model *model, const char *name, xbt_dict_t props,
177 lmm_constraint_t constraint, int core, double speedPeak, double speedScale)
178 : Cpu(model, name, props, constraint, core, speedPeak, speedScale, SURF_RESOURCE_ON)
181 Cpu::Cpu(Model *model, const char *name, xbt_dict_t props,
182 int core, double speedPeak, double speedScale)
183 : Cpu(model, name, props, core, speedPeak, speedScale, SURF_RESOURCE_ON)
187 surf_callback_emit(cpuDestructedCallbacks, this);
188 if (p_constraintCoreId){
189 for (int i = 0; i < m_core; i++) {
190 xbt_free(p_constraintCoreId[i]);
192 xbt_free(p_constraintCore);
194 if (p_constraintCoreId)
195 xbt_free(p_constraintCoreId);
198 double Cpu::getCurrentPowerPeak()
203 double Cpu::getSpeed(double load)
205 return load * m_speedPeak;
208 double Cpu::getAvailableSpeed()
210 /* number between 0 and 1 */
219 void Cpu::setState(e_surf_resource_state_t state)
221 e_surf_resource_state_t old = Resource::getState();
222 Resource::setState(state);
223 surf_callback_emit(cpuStateChangedCallbacks, this, old, state);
230 void CpuAction::updateRemainingLazy(double now)
234 xbt_assert(getStateSet() == getModel()->getRunningActionSet(),
235 "You're updating an action that is not running.");
237 /* bogus priority, skip it */
238 xbt_assert(getPriority() > 0,
239 "You're updating an action that seems suspended.");
241 delta = now - m_lastUpdate;
244 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains was %f, last_update was: %f", this, m_remains, m_lastUpdate);
245 double_update(&(m_remains), m_lastValue * delta, sg_maxmin_precision*sg_surf_precision);
247 if (TRACE_is_enabled()) {
248 Cpu *cpu = static_cast<Cpu*>(lmm_constraint_id(lmm_get_cnst_from_var(getModel()->getMaxminSystem(), getVariable(), 0)));
249 TRACE_surf_host_set_utilization(cpu->getName(), getCategory(), m_lastValue, m_lastUpdate, now - m_lastUpdate);
251 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains is now %f", this, m_remains);
255 m_lastValue = lmm_variable_getvalue(getVariable());
260 * This function formulates a constraint problem that pins a given task to
261 * particular cores. Currently, it is possible to pin a task to an exactly one
262 * specific core. The system links the variable object of the task to the
263 * per-core constraint object.
265 * But, the taskset command on Linux takes a mask value specifying a CPU
266 * affinity setting of a given task. If the mask value is 0x03, the given task
267 * will be executed on the first core (CPU0) or the second core (CPU1) on the
268 * given PM. The schedular will determine appropriate placements of tasks,
269 * considering given CPU affinities and task activities.
271 * How should the system formulate constraint problems for an affinity to
274 * The cpu argument must be the host where the task is being executed. The
275 * action object does not have the information about the location where the
276 * action is being executed.
278 void CpuAction::setAffinity(Cpu *cpu, unsigned long mask)
280 lmm_variable_t var_obj = getVariable();
281 XBT_IN("(%p,%lx)", this, mask);
284 unsigned long nbits = 0;
286 /* FIXME: There is much faster algorithms doing this. */
287 for (int i = 0; i < cpu->m_core; i++) {
288 unsigned long has_affinity = (1UL << i) & mask;
294 XBT_CRITICAL("Do not specify multiple cores for an affinity mask.");
295 XBT_CRITICAL("See the comment in cpu_action_set_affinity().");
300 for (int i = 0; i < cpu->m_core; i++) {
301 XBT_DEBUG("clear affinity %p to cpu-%d@%s", this, i, cpu->getName());
302 lmm_shrink(cpu->getModel()->getMaxminSystem(), cpu->p_constraintCore[i], var_obj);
304 unsigned long has_affinity = (1UL << i) & mask;
306 /* This function only accepts an affinity setting on the host where the
307 * task is now running. In future, a task might move to another host.
308 * But, at this moment, this function cannot take an affinity setting on
311 * It might be possible to extend the code to allow this function to
312 * accept affinity settings on a future host. We might be able to assign
313 * zero to elem->value to maintain such inactive affinity settings in the
314 * system. But, this will make the system complex. */
315 XBT_DEBUG("set affinity %p to cpu-%d@%s", this, i, cpu->getName());
316 lmm_expand(cpu->getModel()->getMaxminSystem(), cpu->p_constraintCore[i], var_obj, 1.0);
320 if (cpu->getModel()->getUpdateMechanism() == UM_LAZY) {
321 /* FIXME (hypervisor): Do we need to do something for the LAZY mode? */
326 void CpuAction::setState(e_surf_action_state_t state){
327 e_surf_action_state_t old = getState();
328 Action::setState(state);
329 surf_callback_emit(cpuActionStateChangedCallbacks, this, old, state);