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Kernel: Track processor idle state and wake processors when waking threads

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Attempt to wake idle processors to get threads to be scheduled more quickly.
We don't want to wait until the next timer tick if we have processors that
aren't doing anything.
This commit is contained in:
Tom
2020-10-28 16:06:16 -06:00
committed by Andreas Kling
parent 39f408daa0
commit c531084873
4 changed files with 72 additions and 3 deletions
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8
Kernel/Scheduler.cpp
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@@ -544,13 +544,17 @@ void Scheduler::notify_finalizer()
void Scheduler::idle_loop(void*)
{
dbgln("Scheduler[{}]: idle loop running", Processor::id());
auto& proc = Processor::current();
dbgln("Scheduler[{}]: idle loop running", proc.get_id());
ASSERT(are_interrupts_enabled());
for (;;) {
proc.idle_begin();
asm("hlt");
if (Processor::id() == 0)
proc.idle_end();
ASSERT_INTERRUPTS_ENABLED();
if (Processor::current().id() == 0)
yield();
}
}