Kernel: Preempt Single core on redudant yields.

src/core/cpu_manager.h

@@ -45,6 +45,8 @@ public:
     std::function<void(void*)> GetSuspendThreadStartFunc();
     void* GetStartFuncParamater();
 
+    void PreemptSingleCore();
+
     std::size_t CurrentCore() const {
         return current_core.load();
     }
@@ -71,8 +73,6 @@ private:
 
     void RunThread(std::size_t core);
 
-    void PreemptSingleCore();
-
     struct CoreData {
         std::shared_ptr<Common::Fiber> host_context;
         std::unique_ptr<Common::Event> enter_barrier;