Emulator

Do you still have this problem with revision 7669 (the revision of dolphin-emu-trunk currently in my PPA)? If so, what is your processor/gpu combination? What settings do you have in dolphin?

Definitely. My FPS is between 19 and 29 at all times. Full speed with 3.0. I have a Phenom II Triple Core at 3.x ghz and a radeon hd 4600 @ 800 Mhz, 1024 mb. 3gb ram.

Ok, I did some more thorough testing, and 3.0 isn't full speed, but between 45 and 62, mostly hovering around 55 which is definitely playable. r7669 definitely NOT playable. Also, on my Windows 7 x64 Ultimate partition I have to limit the FPS and then get pretty solid FPS regardless. So performance is definitely degraded as of the last few revisions, and definitely behind Windows Dx9 as of forever.

I get about the same performance from the OpenGL backend in both windows and linux. Although in order to achieve that I had to tweak the ondemand cpu frequency governor. You may try that. See http://brainwreckedtech.wordpress.com/2009/05/29/ubuntu-9-04-bug-ondemand-doesnt-scale-cpu-speed/. I use a cpu threshold of 40 to get the best results. Of course the Dx9 plugin on windows is still faster, but that is not a new issue.

That tweak to the init.d file did in fact give me a small boost. I'm pretty close to 60fps the whole time, only dipping below when a lot of objects show up on screen. (In 3.0). I also got 2-3fps from turning off compiz for metacity. This is all at 1080p, btw. I'm sure I'd be absolute full speed at lower res, but then I'm only using a portion of my screen. For whatever reason a lower res doesn't scale to full screen. Probably an ATI driver issue.

I should point out that I have always had to use that tweak to get decent speed from emulation in dolphin. I get very little speed difference between the 3.0 release and the current svn revision. Although, I did see a decrease in speed with the first few revisions after the texture cache rewrite merge. I have a Phenom II dual core with the other two cores unlocked, so the processor is similar to yours. Our big difference is in the graphics chips. I have an NVidia GeForce 9500 GT.

So this issue with the trunk build is definitely ATI.

Find out what revision caused the performance regression. It apparently is between 3.0 (start with r7615) and r7661. Without further info, this report is invalid.

Riiiiight. No information means magically fixed? Lol

No, no information upon request means invalid.

(Not like we accepted performance issues anyway, thus I said to find a particular commit which caused slowdown. However, you'd likely have ended up with a commit which was supposed to sacrifice performance for accuracy)

Well, I for one don't do as much testing since the google code has
switched to hexidecimal releases. It just seems less coherent. Not that I
have much time anymore anyway.