[ATrpms-users] high cpu usage... is MMX *really* enabled?

[Axel Thimm]

On Thu, Dec 28, 2006 at 01:36:13AM -0800, john sturgeon wrote:
> Hey all,
> 
> I've recently upgraded to an Athlon 4200+ CPU and have also upgraded
> to the latest rpm of mythtv (release: 148.fc5.at)
> 
> I'm experiencing *extremely* high CPU usage when playing back HDTV to
> the tune of 90-100% and getting frequent prebuffering pauses.
> 
> I've been trying to figure out what the problem is, and finally, I
> decided to disable MMX/SSE instructions using nvidia-settings.  The
> results is that playback is *the same* with it enabled, or disabled.

nvidia-settings can't disable mmx support in random other software,
all it does is disable it for the nvidia libs ...

> My question: is there any way to verify that mythtv-frontend is
> *indeed* using MMX?

If you don't take my word for it, then maybe some --version or similar
switch may reveal it. In doubt use that old 586 and see whether it
throws any mmx exceptions. :=)

The true reason behind low performance is usually a badly configured
nvidia setup. Have you been using anything else than atrpms' packages
for nvidia? Have you coinstalled more than one driver version?

Make sure you have nvidia-graphics and yum-plugin-kmdl installed and
use nvidia-graphics-switch to ensure you are using the proper driver.
-- 
Axel.Thimm at ATrpms.net
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: not available
Url : http://lists.atrpms.net/pipermail/atrpms-users/attachments/20061228/1d91f438/attachment.bin