summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorbunnei <bunneidev@gmail.com>2017-01-06 06:40:39 +0100
committerGitHub <noreply@github.com>2017-01-06 06:40:39 +0100
commit1c792389e677ac458696af1903812b5cdc400eab (patch)
treedf7a11197a1d7afd3e4f9fafd207be4ad70b6ac1
parentMerge pull request #2409 from Subv/unused_funcs (diff)
parentKernel: Removed the priority boost code for starved threads. (diff)
downloadyuzu-1c792389e677ac458696af1903812b5cdc400eab.tar
yuzu-1c792389e677ac458696af1903812b5cdc400eab.tar.gz
yuzu-1c792389e677ac458696af1903812b5cdc400eab.tar.bz2
yuzu-1c792389e677ac458696af1903812b5cdc400eab.tar.lz
yuzu-1c792389e677ac458696af1903812b5cdc400eab.tar.xz
yuzu-1c792389e677ac458696af1903812b5cdc400eab.tar.zst
yuzu-1c792389e677ac458696af1903812b5cdc400eab.zip
-rw-r--r--src/core/hle/kernel/thread.cpp27
1 files changed, 0 insertions, 27 deletions
diff --git a/src/core/hle/kernel/thread.cpp b/src/core/hle/kernel/thread.cpp
index 7b351ed5e..cb9a93ee4 100644
--- a/src/core/hle/kernel/thread.cpp
+++ b/src/core/hle/kernel/thread.cpp
@@ -141,28 +141,6 @@ void ArbitrateAllThreads(u32 address) {
}
}
-/// Boost low priority threads (temporarily) that have been starved
-static void PriorityBoostStarvedThreads() {
- u64 current_ticks = CoreTiming::GetTicks();
-
- for (auto& thread : thread_list) {
- // TODO(bunnei): Threads that have been waiting to be scheduled for `boost_ticks` (or
- // longer) will have their priority temporarily adjusted to 1 higher than the highest
- // priority thread to prevent thread starvation. This general behavior has been verified
- // on hardware. However, this is almost certainly not perfect, and the real CTR OS scheduler
- // should probably be reversed to verify this.
-
- const u64 boost_timeout = 2000000; // Boost threads that have been ready for > this long
-
- u64 delta = current_ticks - thread->last_running_ticks;
-
- if (thread->status == THREADSTATUS_READY && delta > boost_timeout) {
- const s32 priority = std::max(ready_queue.get_first()->current_priority - 1, 0);
- thread->BoostPriority(priority);
- }
- }
-}
-
/**
* Switches the CPU's active thread context to that of the specified thread
* @param new_thread The thread to switch to
@@ -196,9 +174,6 @@ static void SwitchContext(Thread* new_thread) {
ready_queue.remove(new_thread->current_priority, new_thread);
new_thread->status = THREADSTATUS_RUNNING;
- // Restores thread to its nominal priority if it has been temporarily changed
- new_thread->current_priority = new_thread->nominal_priority;
-
Core::CPU().LoadContext(new_thread->context);
Core::CPU().SetCP15Register(CP15_THREAD_URO, new_thread->GetTLSAddress());
} else {
@@ -534,8 +509,6 @@ SharedPtr<Thread> SetupMainThread(u32 entry_point, s32 priority) {
}
void Reschedule() {
- PriorityBoostStarvedThreads();
-
Thread* cur = GetCurrentThread();
Thread* next = PopNextReadyThread();