From fc2266130b450952777cd3a9e47adb36960de8e7 Mon Sep 17 00:00:00 2001 From: Subv Date: Thu, 5 Jan 2017 14:14:22 -0500 Subject: Kernel: Don't attempt to yield execution in SleepThread(0) if there are no available threads to run. With this we avoid an useless temporary deschedule of the current thread. --- src/core/hle/svc.cpp | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'src/core/hle/svc.cpp') diff --git a/src/core/hle/svc.cpp b/src/core/hle/svc.cpp index 855f3af82..50d35ab97 100644 --- a/src/core/hle/svc.cpp +++ b/src/core/hle/svc.cpp @@ -849,6 +849,11 @@ static ResultCode CancelTimer(Kernel::Handle handle) { static void SleepThread(s64 nanoseconds) { LOG_TRACE(Kernel_SVC, "called nanoseconds=%lld", nanoseconds); + // Don't attempt to yield execution if there are no available threads to run, + // this way we avoid a useless reschedule to the idle thread. + if (nanoseconds == 0 && !Kernel::HaveReadyThreads()) + return; + // Sleep current thread and check for next thread to schedule Kernel::WaitCurrentThread_Sleep(); -- cgit v1.2.3