From d494b074e8afd3aff7b65afc7b977496be06ccc9 Mon Sep 17 00:00:00 2001 From: Fernando Sahmkow Date: Tue, 10 Mar 2020 13:13:39 -0400 Subject: Kernel: Preempt Single core on redudant yields. --- src/core/hle/kernel/svc.cpp | 23 +++++++++++++++++------ 1 file changed, 17 insertions(+), 6 deletions(-) (limited to 'src/core/hle/kernel/svc.cpp') diff --git a/src/core/hle/kernel/svc.cpp b/src/core/hle/kernel/svc.cpp index aad2ac549..eca92b356 100644 --- a/src/core/hle/kernel/svc.cpp +++ b/src/core/hle/kernel/svc.cpp @@ -19,6 +19,7 @@ #include "core/core_manager.h" #include "core/core_timing.h" #include "core/core_timing_util.h" +#include "core/cpu_manager.h" #include "core/hle/kernel/address_arbiter.h" #include "core/hle/kernel/client_port.h" #include "core/hle/kernel/client_session.h" @@ -1509,21 +1510,31 @@ static void SleepThread(Core::System& system, s64 nanoseconds) { if (nanoseconds <= 0) { switch (static_cast(nanoseconds)) { - case SleepType::YieldWithoutLoadBalancing: - current_thread->YieldSimple(); + case SleepType::YieldWithoutLoadBalancing: { + auto pair = current_thread->YieldSimple(); + is_redundant = pair.second; break; - case SleepType::YieldWithLoadBalancing: - current_thread->YieldAndBalanceLoad(); + } + case SleepType::YieldWithLoadBalancing: { + auto pair = current_thread->YieldAndBalanceLoad(); + is_redundant = pair.second; break; - case SleepType::YieldAndWaitForLoadBalancing: - current_thread->YieldAndWaitForLoadBalancing(); + } + case SleepType::YieldAndWaitForLoadBalancing: { + auto pair = current_thread->YieldAndWaitForLoadBalancing(); + is_redundant = pair.second; break; + } default: UNREACHABLE_MSG("Unimplemented sleep yield type '{:016X}'!", nanoseconds); } } else { current_thread->Sleep(nanoseconds); } + + if (is_redundant && !system.Kernel().IsMulticore()) { + system.GetCpuManager().PreemptSingleCore(); + } } /// Wait process wide key atomic -- cgit v1.2.3