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Re: [Qemu-devel] Re: Qemu 2D performance plunges below acceptable levels


From: Stefano Stabellini
Subject: Re: [Qemu-devel] Re: Qemu 2D performance plunges below acceptable levels
Date: Wed, 18 Feb 2009 10:48:20 +0000
User-agent: Thunderbird 2.0.0.14 (X11/20080505)

malc wrote:

> On Wed, 18 Feb 2009, Alexey Eremenko wrote:
> 
>> On Tue, Feb 17, 2009 at 7:00 PM, Stefano Stabellini
>> <address@hidden> wrote:
>>> Avi Kivity wrote:
>>>
>>>> Stefano Stabellini wrote:
>>>>> Do you see the problem only on X11 remote?
>>>>> How bad is on vnc?
>>>>>
>>>> vnc regresses in exactly the same way.
>>>>
>> Well, in my experience both local X11 and VNC are fast in KVM-84.
>>
>> But remote X11/SDL performance plunged below usable levels.
> 
> FWIW same thing happened to Mac OS X + SDL.
> 


Are you talking about SDL local?
If so, is your host a big endian machine and the guest a little endian?
What is the color depth and bpp of the guest (I assume that the host is
32bpp)?
As usual two good tests are to check the vnc case and a guest in 32bpp too.

I tried to repeat the "tree C:\" test on qemu i386 but I couldn't see
any significant difference.





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