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Kernel: Only consider scheduler Running threads if they're the current

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There will be as many threads in Running state as there are CPUs.
Only consider a thread in that state if it is the current thread
already.
This commit is contained in:
Tom 2020-10-25 22:02:14 -06:00 • committed by Andreas Kling
parent 1e2e3eed62
commit 3ffdaabe10
1 changed files with 8 additions and 5 deletions
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13
Kernel/Scheduler.cpp
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@ -465,8 +465,8 @@ bool Scheduler::pick_next()
});
#ifdef SCHEDULER_RUNNABLE_DEBUG
dbg() << "Non-runnables:";
Scheduler::for_each_nonrunnable([](Thread& thread) -> IterationDecision {
dbg() << "Scheduler[" << Processor::current().id() << "]: Non-runnables:";
Scheduler::for_each_nonrunnable([&](Thread& thread) -> IterationDecision {
if (thread.state() == Thread::Queued)
dbg() << " " << String::format("%-12s", thread.state_string()) << " " << thread << " @ " << String::format("%w", thread.tss().cs) << ":" << String::format("%x", thread.tss().eip) << " Reason: " << (thread.wait_reason() ? thread.wait_reason() : "none");
else if (thread.state() == Thread::Dying)
@ -476,7 +476,7 @@ bool Scheduler::pick_next()
return IterationDecision::Continue;
});
dbg() << "Runnables:";
dbg() << "Scheduler[" << Processor::current().id() << "]: Runnables:";
Scheduler::for_each_runnable([](Thread& thread) -> IterationDecision {
dbg() << " " << String::format("%3u", thread.effective_priority()) << "/" << String::format("%2u", thread.priority()) << " " << String::format("%-12s", thread.state_string()) << " " << thread << " @ " << String::format("%w", thread.tss().cs) << ":" << String::format("%x", thread.tss().eip);
return IterationDecision::Continue;
@ -487,8 +487,11 @@ bool Scheduler::pick_next()
Vector<Thread*, 128> sorted_runnables;
for_each_runnable([&](auto& thread) {
if ((thread.affinity() & (1u << Processor::current().id())) != 0)
sorted_runnables.append(&thread);
if ((thread.affinity() & (1u << Processor::current().id())) == 0)
return IterationDecision::Continue;
if (thread.state() == Thread::Running && &thread != current_thread)
return IterationDecision::Continue;
sorted_runnables.append(&thread);
if (&thread == scheduler_data.m_pending_beneficiary) {
thread_to_schedule = &thread;
return IterationDecision::Break;