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gsdx-queue: add a comment for the future

This commit is contained in:
Gregory Hainaut 2015-03-27 18:58:34 +01:00
parent fa243afbab
commit e605ed1d09
1 changed files with 5 additions and 0 deletions
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5
plugins/GSdx/GSThread_CXX11.h
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@ -201,6 +201,11 @@ public:
// This queue reserves 'only' RENDERING threads mostly the same performance as a no reservation queue if the CPU is fast enough // This queue reserves 'only' RENDERING threads mostly the same performance as a no reservation queue if the CPU is fast enough
// pros: nearly best fps by thread // pros: nearly best fps by thread
// cons: requires (1 + eThreads) cores for GS emulation only ! Reserved to 6/8 cores CPU. // cons: requires (1 + eThreads) cores for GS emulation only ! Reserved to 6/8 cores CPU.
// Note: I'm not sure of the source of the speedup
// 1/ It could be related to less MT logic (lock, cond var)
// 2/ But I highly suspect that waking up thread is rather slow. My guess
// is that low power feature (like C state) increases latency. In this case
// gain will be smaller if PCSX2 is running or in limited core CPU (<=4)
template<class T> class GSJobQueueSpin : public IGSJobQueue<T> template<class T> class GSJobQueueSpin : public IGSJobQueue<T>
{ {
protected: protected: