[mythtv-users] XvMC with Nvidia 7676 no change in CPU usage?

[Tom Lichti]

Kevin Kuphal wrote:
> Tom Lichti wrote:
>   
>> Kevin Kuphal wrote:
>>   
>>     
>>> Steven Adeff wrote:
>>>   
>>>     
>>>       
>>>> I'm playing around with XvMC on my desktop/server since it has a
>>>> FX5200 and I'm thinking of using it as a frontend for my bedroom. I've
>>>> got Myth and mplayer compiled with XvMC support and both look like
>>>> they're using xvmc when I enable them to, but what I don't see is any
>>>> reduction in CPU usage with either.
>>>> I'm running X as root to make sure I have full privileges as I test.
>>>> I'm testing mostly with HD content since SD content uses so little CPU
>>>> on my machine to begin with.
>>>>   
>>>>     
>>>>       
>>>>         
>>> If you have a greyscale OSD, then you are using XvMC.  If your OSD is 
>>> color, you're not.  XvMC is selected in the playback settings for TV 
>>> where you pick your MPEG decoder (Standard, libmpeg2, XvMC, etc.). 
>>>
>>> Kevin
>>>   
>>>     
>>>       
>> So why is it when I have XvMC enabled (greyscale OSD) my CPU usage is 
>> about 90%, and when it's not enabled my CPU usage is around 50%? Seems 
>> kind of bass-ackwards.
>>   
>>     
> Sure does.  Have you played with the OpenGL Vsync settings?  I've only 
> used XvMC on my MX440 system and it allows me to playback 1080i HD 
> content perfectly so I'm not sure what may be causing your problem.
>   
Hmmm. I just turned off Open GL Vsync in myth and it drops to about 60%. 
Not great, but better. Should I stop loading GLX, etc. in XFree86?

Thanks
Tom