Xorg Uses at least 18% of the cpu

[Philip Walden]

Andras Simon wrote:
>
> Hmm. I'm using Xorg's nv driver,  not the Nvidia binary driver, and my
> Nvidia card is pretty old, so this may be totally irrelevant, but
> anyway:

The driver should not matter. The MTRR gives the driver efficient access 
to the AGP card.
>
> $ cat /proc/mtrr
> reg00: base=0x00000000 (   0MB), size= 512MB: write-back, count=1
> reg01: base=0xe0000000 (3584MB), size=  64MB: write-combining, count=1

This *looks* like a decent MTRR setting although it would appear 
incorrect for the lspci listing below

reg01: base=0xd8000000 (?????MB), size=  128MB: write-combining, count=1
>
> $ /sbin/lspci -v
> ...
> VGA compatible controller: nVidia Corporation NV11 [GeForce2 MX/MX 400]
> (rev b2) (prog-if 00 [VGA])
>        Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 11
>        Memory at e4000000 (32-bit, non-prefetchable) [size=16M]
>        Memory at d8000000 (32-bit, prefetchable) [size=128M]
>
> Unless I misunderstood your explanation, this means that the mtrr
> settings are not correct. Still, Xorg's cpu utilization is 0.3% (all
> this on a PIII, FC5, with regularly updated Xorg server).
If Xorg is using only 0.3% cpu when doing intensive graphics/video (ie 
mplayer, xine) then I think your MTRR is just fine.