Re: Linux in a binary world... a doomsday scenario

Helge Hafting
2005-12-13T08:06:53Z

Nix wrote:
[...]

>FWIW when glxgears is running, X consumes about 2% more CPU time
>than normal: it's almost impossible to detect.
>
>
Sure - the load is low - and so is performance. As if the machine
isn't really trying - perhaps the driver is waiting when there is
no need to wait.

>It sounds to me almost like direct rendering is disabled, which will of
>course have catastropic effects on performance. What does glxinfo say?
>
>
No. While it is bad, it is not as bad as sw rendering. Tuxracer
with sw rendering is unbearable - 2 seconds per frame or so!

>> Most people don't seem to have performance problems,
>>with their radeons, so perhaps my card is a bit different and
>>don't fit the driver.
>>
>>
>
>The X startup log can also be useful here. I've noticed that if you
>get the AGPMode wrong in either direction, the results can be
>catastrophic: if it's too low the card is terribly slow and if it's
>too high you soon get the X server hanging as it waits forever for
>the card to respond to something it hasn't had time to receive (or
>something like that, anyway).
>
>
Well, there is no AGPmode for a PCI card, is there?

Helge Hafting