Re: Kernel tweaks for AMD 64

["Bryan J. Smith" <b.j.smith@ieee.org>]

NZG <ngustavson@emacinc.com> wrote:
> I went ahead and modified my kernel (I needed to anyway
> because I moved from a via to a SiS chipset)

You shouldn't have to do that.

> to optimize for the K8 architecture

If you run a Linux/x86-64 kernel/distro, you should have that
already.

> and rebuild the whole thing with gcc 4. 

What distro is this?

> Works great, in fact it has noticeably better performance
> playing WoW, no more slowdowns even when I enter the great
> forge.
> So now, I'm happy, but I'm wondering...
> Are there any other optimizations I should be turning on in
> the kernel?
> What about this 64 bit AGP bus option? ( I use AGP 8x).

There is _no_ 64-bit AGP bus option.  Now there is the I/O
MMU of the A64/Opteron, but that'a nother story.

> Is there anything I need to turn on to correctly use the
> new hypertransport technology?
> Or is that transparent to the OS?

On a single socket, it's transparent to the OS.
If you go multi-socket, then processor affinity starts
becoming an issue for both program and I/O.

> Any suggestions or tweaks you would recommend?
> Do you recommend moving up to the 64 bit nvidia drivers or
> sticking with the old 32 bit stuff?

If you're running a Linux/x86-64 kernel, you _have_to_ run
the nVidia x86-64 (AMD64/EM64T) drivers.

If you're running a Linux/x86 kernel, you _have_to_ run the
nVidia x86 drivers.

I think you just did some K7/K8 kernel optimizations on a
Linux/i386 distro and kernel, and didn't actually switch to a
Linux/x86-64 distro/kernel.


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Bryan J. Smith                | Sent from Yahoo Mail
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