AMD64- Solutions

[Steve Kargl]

On Fri, Dec 03, 2004 at 09:14:08AM +0800, James wrote:
> ?z?b <conljc$1pep$1 at FreeBSD.csie.NCTU.edu.tw> ??????????:
> > FreeBSD/amd64 works well on a dual opteron Tyan K8S Pro system
> > with less than 8 GB of memory.  It does not boot if you have
> > more than 8 GB.  See the FreeBSD-amd64 list over the last week or
> > 2 for detailed emails continaing the panic messages.
> 
> I use Tyan K8S Pro (BIOS v2.03, factory default) with 16G RAM.
> It works well on heavy memory load and CPU load. (mysql and others)
> (Even the BIOS option SRAT on/off both works.)

What type of memory are you using?  Can you send me (off the
mailing list) a verbose boot message?  I flashed the BIOS
from v2.02 to v2.03 with no improvements.

> 5.3-STABLE amd64 improves a lot on performance than 5.2.1.
> 
> Maybe you can tell us what type of your jobs.

I can't boot with the full 16 GB.  I need to set
hw.physmem="8G" to boot.   The 16 GB is on the 
motherboard and is detected during POST.  FreeBSD
simply panics if I try setting hw.physmem to anything
above 8 GB.  My memory is Cosair PC2700 recommended 
by Tyan for this motherboard.

As far as my jobs, I run numerical simulations of heat
transfer in biological tissues and nonlinear acoustics.
The numerical techniques are standard and hybrid finite
difference solutions to coupled PDEs.  I can easily 
consume the 16 GB if not more memory as I add more
realistic physics to the problem.

-- 
Steve