/*
* Called at splsched.
*/
void
ast_check(
processor_t processor)
{
thread_t thread = processor->active_thread;
if (processor->state == PROCESSOR_RUNNING ||
processor->state == PROCESSOR_SHUTDOWN) {
ast_t preempt;
/*
* Propagate thread ast to processor.
*/
pal_ast_check(thread);
ast_propagate(thread->ast);
/*
* Context switch check.
*/
thread_lock(thread);
processor->current_pri = thread->sched_pri;
processor->current_thmode = thread->sched_mode;
processor->current_sfi_class = thread->sfi_class = sfi_thread_classify(thread);
if ((preempt = csw_check(processor, AST_NONE)) != AST_NONE)
ast_on(preempt);
thread_unlock(thread);
}
}
/*
* Handle preemption IPI or IPI in response to setting an AST flag
* Triggered by cause_ast_check
* Called at splsched
*/
void
ast_check(processor_t processor)
{
if (processor->state != PROCESSOR_RUNNING &&
processor->state != PROCESSOR_SHUTDOWN)
return;
thread_t thread = processor->active_thread;
assert(thread == current_thread());
thread_lock(thread);
/*
* Propagate thread ast to processor.
* (handles IPI in response to setting AST flag)
*/
ast_propagate(thread);
boolean_t needs_callout = false;
processor->current_pri = thread->sched_pri;
processor->current_sfi_class = thread->sfi_class = sfi_thread_classify(thread);
processor->current_recommended_pset_type = recommended_pset_type(thread);
perfcontrol_class_t thread_class = thread_get_perfcontrol_class(thread);
if (thread_class != processor->current_perfctl_class) {
/* We updated the perfctl class of this thread from another core.
* Since we dont do CLPC callouts from another core, do a callout
* here to let CLPC know that the currently running thread has a new
* class.
*/
needs_callout = true;
}
processor->current_perfctl_class = thread_class;
ast_t preempt;
if ((preempt = csw_check(processor, AST_NONE)) != AST_NONE)
ast_on(preempt);
thread_unlock(thread);
if (needs_callout) {
machine_switch_perfcontrol_state_update(PERFCONTROL_ATTR_UPDATE,
mach_approximate_time(), 0, thread);
}
}
