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Merge pull request #1665 from Sonicadvance1/yielding_the_dual_core_world

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Idle loop in GPU loop on dual core systems.
This commit is contained in:
Ryan Houdek
2014-12-09 02:22:27 -06:00
parent 1ce3696e8b d58bba2160
commit 0578ec92c0
1 changed files with 7 additions and 3 deletions
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10
Source/Core/VideoCommon/Fifo.cpp
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@ -4,6 +4,7 @@
#include "Common/Atomic.h" #include "Common/Atomic.h"
#include "Common/ChunkFile.h" #include "Common/ChunkFile.h"
#include "Common/CPUDetect.h"
#include "Common/FPURoundMode.h" #include "Common/FPURoundMode.h"
#include "Common/MemoryUtil.h" #include "Common/MemoryUtil.h"
#include "Common/Thread.h" #include "Common/Thread.h"
@ -276,6 +277,10 @@ void RunGpuLoop()
SCPFifoStruct &fifo = CommandProcessor::fifo; SCPFifoStruct &fifo = CommandProcessor::fifo;
u32 cyclesExecuted = 0; u32 cyclesExecuted = 0;
// If the host CPU has only two cores, idle loop instead of busy loop
// This allows a system that we are maxing out in dual core mode to do other things
bool yield_cpu = cpu_info.num_cores <= 2;
while (GpuRunningState) while (GpuRunningState)
{ {
g_video_backend->PeekMessages(); g_video_backend->PeekMessages();
@ -354,9 +359,8 @@ void RunGpuLoop()
// NOTE(jsd): Calling SwitchToThread() on Windows 7 x64 is a hot spot, according to profiler. // NOTE(jsd): Calling SwitchToThread() on Windows 7 x64 is a hot spot, according to profiler.
// See https://docs.google.com/spreadsheet/ccc?key=0Ah4nh0yGtjrgdFpDeF9pS3V6RUotRVE3S3J4TGM1NlE#gid=0 // See https://docs.google.com/spreadsheet/ccc?key=0Ah4nh0yGtjrgdFpDeF9pS3V6RUotRVE3S3J4TGM1NlE#gid=0
// for benchmark details. // for benchmark details.
#if 0 if (yield_cpu)
Common::YieldCPU(); Common::YieldCPU();
#endif
} }
else else
{ {