[Openchrome-users] XvMC on cle266 working jumpy/high load suddenly

[John Robinson]

On 03/07/2006 13:10, Mario Emmenlauer wrote:
> Thomas Hellstr?m wrote:
>>> Xavier Bachelot wrote:
>>>> Mario Emmenlauer wrote:
>>>>> I used to have XvMC-accelerated video on CLE266 w/ around 5%
>>>>> cpu using Xorg 7 with Gentoo's x11-drm, xine -V xxmc and
>>>>> video.device.unichrome_cpu_save:1.
>>>>>     
>>>> This xine option is usefull only in some situations.
>>>> It should be enabled only when you don't have "EnableAGPDMA" in your 
>>>> xorg conf, which is the prefered option. Actually, unichrome_cpu_save 
>>>> should only be used with K8M800, which doesn't support the xorg option, 
>>>> iirc.
>>>>   
>>> Also, it is worth noting that the xine cpu save option is a horrible
>>> hack that requires that the kernel timer tick frequency is 1000Hz or
>>> above. Some distributions ship their kernels with a lower tick frequency
>>> in which case the cpu save option will fail.
> 
> Really good to know, because so many manuals around the web advertise
> this option as 'the ultimate trick' :-/

It probably is, if you like that sort of thing, but I don't.

On my CLE266, I have EnableAGPDMA but no unichrome_cpu_save and xine 
plays DVD/mpeg2 very well, with pretty low CPU usage (~10%).

Cheers,

John.