Major Performance differences between Windows and Linux

[benpicco]

Hi,
I've just compared the Windows and Linux Build of r4800, what was striking were the vast performance differences - while e.g. "Mario Kart - Double Dash" was barely playable with Linux at 640x480, I was able to play it smoothly at 1280x1024 with 8xAA enabled on Windows.
Other games I've tried (Super Mario Sunshine, Super Smash Bros. Melee, Meteroid Prime) showed the same results.
Especially the IL version brought great improvements after some minutes in game - is there an option to use that in Linux too?
In both cases I used the OpenGL Plugin and the latest nvidia 190 driver.
I used Ubuntu 9.10 and Windows 7 (both 64bit)
System: Intel Core 2 Duo E6400 (2.13GHz), 6GiB DDR2 Ram, Geforce 9800GT (512MB VRAM)
Options were the same (default options), Dual core mode on.

What may cause those major performance differences?

[CacoFFF]

I read something about dual-core mode being currently broken in linux, it might be your issue.

[benpicco]

Thank you, there is indeed a notable difference between dual core mode on and off (It's faster with Dual core disabled)
What I found a bit surprising was that there were two Dolphin processes running with dual core mode disabled and four with dual core mode enabled - is this normal?
I hope this bug gets fixed soon.
Something else: Is it possible to use JIT-IL mode with the Linux binary?

[boogerlad]

yes. Someone on googlecode.com said so.

[1080Wii]

I haven't got a Windows install to compare against, although my system specs are quite near what most people are using - and getting good results.

In spite that, the performance on Linux does appear to trail a fair bit behind the experience I feel people are getting on Windows.

Is there any chance of closing this gap?

[jigglywiggly]

I hope changes get made, it runs at like 10fps and some games don't even work. e3200 @ 3.3 ghz on that box.

[1080Wii]

I have Windows 7 Ultimate and the performance in Linux has piqued my interest. I'll shrink down my Linux drive and give it a shot at least to have a comparison on my own machine.

[Xtreme2damax]

Well Dolphin was originally coded for Windows and the Windows versions seem to get quite a bit of the attention, there are still fixes that benefit both/all versions or just the Linux or Mac version. I think a developer stated in the past why performance on the Linux and/or Mac version was lacking compared to Windows so you may want to wait for a developer to answer that question.