Dolphin, the GameCube and Wii emulator - Forums

Full Version: Intermittent stuttering - time for a new GPU?
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Quote:EDIT: Also, I personally believe the problem is with this card. I think I would be getting much better performance with a comparable ATI card.

Not true at all. The symptoms you're describing are clearly a core issue not a graphics issue. Try using a build with the fifo busy patch: http://forums.dolphin-emu.org/showthread.php?tid=13314

Make sure you have the option check in game properties.
Having flip-flopped back and forth I am fairly sure now that it's NOT a graphics issue.

But why do you insist it's a core issue? I'm not the only person with this CPU, other people with this CPU don't seem to be having the same problems. I'm not disagreeing with you, I just want to understand what's wrong, and why people with similar systems aren't experiencing the same problems.

Last night I went so far as to install Windows to an HDD (versus an SSD) and test, same lag in the same places. So you could very well be right. But I linked to videos where the guy was also running a Core i7 920 and he had no lag (I even tried his build).

Could it somehow be related to my motherboard in tandem with my CPU? I have an ASUS P6T Deluxe.

When I look at the archived builds I see many notes re: "FIFO", don't know which build I should be trying.
Quote:But why do you insist it's a core issue? I'm not the only person with this CPU, other people with this CPU don't seem to be having the same problems.

You misunderstand me. A core issue in this case has nothing to do with how powerful your cpu is. It's simply either a timing issue (everything has to stay in sync) or a fifo issue. In case you are new to dolphin let me explain something to you. Everyone once and awhile the developers decide to do something ambitious/difficult. When this happens they usually break a lot of stuff or cause some type of issue that takes awhile for them to fix/sort out. But eventually everything gets back to normal. Recently they did one such event when they made some major changed to the fifo system which ahs likely resulted in the stuttering you are seeing. Give them some time to sort everything out and all will be well. Remember that you are essentially using beta code, that's what the svn is for.
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SINCE OBVIOUSLY NONE OF YOU READ MY POST HERE IT IS AGAIN:

Dude I can confirm that this is a Dolphin problem, NOT a hardware problem. When I play RE:UC on r6496 I get the exact same stutters at the exact same times as you did in your youtube vid.
After fiddling around with the settings, which didn't do anything, I tried an earlier build: r6337. And voila, no stuttering @ the first headturn, some minor stuttering @ approaching the door. But that's about it.

So It's definately not your hardware, just how dolphin is built, and how every revision is different. I hope this is a relief Wink

PS: in both revisions I have redone the exact same thing (start new game, choose the dude, play until thru the first door at least) multiple times, with every time (per revision) the same result. So I'd say it's properly tested.

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Vidar

Hey you're right, the stuttering is gone Big Grin!
Does anyone know which revision brought these horrible stutterings? I'll search :o

EDIT: I think i found it. Could anyone test 6417 and 6416? 6416 isn't perfect but most of the stuttering is gone
If you are certain of the above, mention it to the devs at google code that the FramebufferManager code merging into VideoCommonat r6417 caused extreme slowdowns at various games using (which dx plugin you use), even at the second run. Personally i tried earlier versions than that and they didn't seem to have such an issue, especially in the second run. Now if it is that specific version responsible i can't say for sure, if you tested it though it is not bad to mention it by writing an issue. Something might have been overlooked that is easily fixable, you never know.
I told rodolfo about this a few days ago, he emailed me 2 days ago saying he had fixed it so it should be gone now. He said he knew about it but it took him awhile to fix it.

@slaQ

We have been saying that the whole time. Eleo is the only person who is not convinced of this.
Is my disbelief all that absurd?

slaQ mentions build 6337, claiming there is no stuttering at the first turn, but this contradicts my experiences. I just tried that build and experienced plenty of stuttering "@ the first headturn", whereas he claims there was none at all. I'm not over here fretting over a slight dip; it's pretty bad stuttering; audio skips numerous times and controls become unresponsive for about a couple of seconds. I even played through the area twice (I was unaware until now that games run better the second time [counter-intuitive, but I'm not complaining, just confused]) and there was no improvement.

Being told that build XXXX works fine or is an improvement, or seeing YouTube videos where the guy gets perfect or nearly-perfect performance using a certain build (with hardware highly similar to mine) and then going and using that build specifically with no success, makes me less inclined to believe that it's a Dolphin problem, or at least solely a Dolphin problem.

I'm not trying to be hard-headed and disregard everyone's advice in favor of my own, but it's hard to go with what someone is telling me when that advice doesn't jibe with what's happening right in front of my eyes.

I've got like ten different builds unpacked all with the folders renamed to the build number. I've been struggling with this for days and days trying to figure this out. So it's a Dolphin issue, OK, but I've seen video "proof" of the game running just fine, so I figure in theory I should be able to get the same results with the right approach, but so far have not been able to. There's nothing more frustrating and discouraging than seeing people get full speed in the game and then not be able to duplicate that success no matter what I try. It's one thing if it doesn't work for anybody, or if I'm trying to get 100% speed with low-end hardware, but that's not even the case. Can you see where I'm coming from?

Vidar's mentioned build 6416 is the only one where what he said is in line what my results. Indeed the stuttering is very much improved over any of my past results -- at least on the second run, so that gives me hope.

Thanks for everyone's help above all. It's not like I'm just ignoring everyone's suggestions. Make no mistake: I've read and considered every post in this thread in some cases multiple times.
What build does the person say he;s using (the youtube video)?
Hmm, I can't find the video I thought I had watched where the guy plays through the first part with no stuttering, maybe that video doesn't even exist and I'm retarded, or maybe it wasn't actually a Dolphin video. In this one http://www.youtube.com/watch?v=jUP1zEOuV78 he uses 5063 and it seems pretty smooth. At about 1:25 I generally got really bad stuttering, but I haven't tested that section with 6416 yet so I can't comment. I'll try 5063 again maybe; I didn't know that running the game more than once gave better performance, and may not have even tried that or even played that far.

I think I'm better off now that I understand the problem better and the nuances of using SVN builds Smile In 6416 it's a lot better and not so distracting, I might just stick with that. You guys have helped enough, I won't bug you anymore, lol.

I look forward to the day when all of these games run silky-smooth. Wish I had the ability to contribute to the project somehow.

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