which cputype for Althon 64 X2 Dual Core
jeffrey at goldmark.org
Fri Dec 21 19:17:33 PST 2007
First of all, thank you very much for your response. I have some
follow up questions below.
On Dec 21, 2007, at 6:45 PM, Chuck Swiger wrote:
> On Dec 21, 2007, at 4:33 PM, Jeffrey Goldberg wrote:
>> What optimizations should I make in make.conf?
> A reasonable starting point is no special optimizations, and simply
> disable debug options like WITNESS, INVARIANTS, etc.
I didn't see mention of these in the example make.conf so I don't know
how to disable those if they are enabled in the first place.
> If you plan to go beyond that, you'll need to start by doing some
> benchmarks [...]
I'm after the "low hanging fruit" and I don't really have the
inclination to do such extensive tuning. I was just wondering if
there is anything obvious.
>> The example make.conf says
>> AMD64 architecture: opteron, athlon64, nocona, prescott, core2
>> But I don't know whether althon64 or core2 would be the safest and
>> most appropriate.
>> Also GENERIC for amd64 lists
>> cpu HAMMER
>> is that the best (only) choice?
> Yes, as far as AMD64 code goes. You could always switch down to
> running in 32-bit mode, though.
That answer the question for the kernel configuration. But what
should I put in make.conf as cputype? Right now, I've just left it
I started a make buildworld and was surprised to see that it is using
-O2 -fno-strict-aliasing -pipe
even though I didn't tell it to do so. -O2 sounds like an odd default
when it appears to be recommended against.
Where should I look for the defaults?
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