Questions about DSPLLE plugin

[Nameless Mofo]

I guess these questions are mostly directed to the devs, but anyway:

- I've read either here or on the googlecode pages that in 32-bit builds, LLE JIT falls back heavily to the LLE interpreter, presumably causing performance loss. Supposedly this had to do with several of the emulated DSP registers being 40-bits wide (which obviously does not fit into a 32-bit x86 register). However, I've tried both 32-bit and 64-bit builds of the same SVN rev from the same compiler (mamario) and performance has been the same. Is this to be expected?

- Using LLE, every game has noticeable audio lag, about 1/2 second or so. Is this some kind of buffer depth issue or something? Can this be fixed/worked around?

- For recent dolphin revs, DSPLLE on thread better to be ON or OFF? Assuming i5 dual core CPU.

[skid]

The DSP uses the 40bit registers for arithmetic. Arithmetic is kinda the primary purpose for the DSP, but if a game doesn't make much use of it, then the difference between the 64bit and 32bit LLE Recompiler will be smaller.

I don't notice any lag here. Try changing the Audio back-end and/or the 32000/48000hz switch.

On a dual core cpu, disable the LLE thread. On a quad core CPU, always enable the LLE thread unless it prevents the game from booting, in which case disable it. There is no possibility where LLE on thread will be slower than without on a quad core.

[Nameless Mofo]

Hi Skidau, I was hoping you'd comment here. Yes those were the regs I was talking about. I'll try your suggestions on switching the backend and 32k/48k switch to get rid of the lag. Currently I use Directsound at 48khz.

So about the LLE on thread, does your comment mean that LLE is able (or close) to use a 3rd core? That would be awesome.

[skid]

Yes, LLE on thread uses the third core.