[Gllug] tweaking memory/optimisation of AMD64

salsaman salsaman at xs4all.nl
Wed Apr 5 01:15:25 UTC 2006

Hi all,
I am setting up a 4 cpu AMD machine with 64 bit Linux, however my 
clients are a little disappointed with the performance, in particular 
with displaying high definition mpeg4 video (1080i) which can be viewed 
under windows 64 at full frame rate (29.93fps). Under Linux most 
applications are only giving about 10 fps. The machine has 16GB ram, but 
it seems only about 2GB is being used. Is it possible to get the system 
to use more memory for swap, etc ? Are there any other recommended 
tweaks for AMD64 ? I have recompiled the kernel for AMD64, SMP. The 
machine also has 2 NVIDIA graphics cards each with 2 heads which I set 
up in a 4 xinerama mode using NVIDIA binary drivers.

Any tips appreciated.


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