On 2/5/07, Philip Walden <pwaldenlinux@xxxxxxxxxxx> wrote:
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.
OK
> > $ 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).
So, based on the above, and your description, I guess I should echo "base=0xd8000000 size=0x8000000 type=write-combining" >| /proc/mtrr
If Xorg is using only 0.3% cpu when doing intensive graphics/video (ie mplayer, xine) then I think your MTRR is just fine.
Well, no, not when under stress. It can easily go up to 50% when mplayer is running. The OP wrote | I have top running in a terminal window and there are two processes | running, Xorg and top. Xorg is using 18% of the cpu. so I assumed this thread was about Xorg cpu utilization when X is idle. Andras
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