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Date:      Fri, 31 Aug 2007 18:43:23 -0700
From:      "David O'Brien" <obrien@freebsd.org>
To:        JoaoBR <joao@matik.com.br>
Cc:        Roman Divacky <rdivacky@freebsd.org>, freebsd-current@freebsd.org, pluknet <pluknet@gmail.com>, =?unknown-8bit?Q?Bj=F6rn_K=F6nig?= <bkoenig@cs.tu-berlin.de>
Subject:   Re: Adding k9 and k10 to bsd.cpu.mk
Message-ID:  <20070901014323.GA41683@dragon.NUXI.org>
In-Reply-To: <200708312120.31912.joao@matik.com.br>
References:  <-3502020561049594852@unknownmsgid> <200708312032.21574.joao@matik.com.br> <20070901000710.GA12223@dragon.NUXI.org> <200708312120.31912.joao@matik.com.br>

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On Fri, Aug 31, 2007 at 09:20:30PM -0300, JoaoBR wrote:
> On Friday 31 August 2007 21:07:10 David O'Brien wrote:
> > > opterons are not easy but it is already kind of advanced cpu so
> > > could be
> >
> > Why are Opteron's any harder?
> 
> because all of them are 64bit but some older ones are not SSE3 capable, < 250 
> I guess now but 252 is but not 100% sure

It's not Opteron model # specific - but silicon revision specific.
There are rev C0 model 250's, along with rev CG, and rev E.

Same for athlon64 - older ones don't support SSE3, newer ones do.


> people 'kind of familiarly' with reading manuals and specs are already
> having difficulties here so imagin an average user (unkndefspec) who
> likes to optimize his kernel (his cpu's kernel of course :) )
>
> so as far as there are a cpu options for a freebsd kernel they should
> be understandable so it might be worse thinking well before doing
> (=less support = less questions = less problemas)

BTW, the AMD offically sanctioned spelling for GCC 'march' is "amdfam10"
 
-- 
-- David  (obrien@FreeBSD.org)
Q: Because it reverses the logical flow of conversation.
A: Why is top-posting (putting a reply at the top of the message) frowned upon?
Let's not play "Jeopardy-style quoting"



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