Re: Intel EM64T Processor Platform

From: David O'Brien (obrien_at_freebsd.org)
Date: 05/31/05

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    Date: Tue, 31 May 2005 07:42:40 -0700
To: Andre Guibert de Bruet <andy@siliconlandmark.com>

    On Tue, May 31, 2005 at 12:00:44AM -0400, Andre Guibert de Bruet wrote:
    > On Sun, 29 May 2005, Roland Smith wrote:
    > >On Sun, May 29, 2005 at 12:00:29AM -0800, Jack L. wrote:
    > >>
    > >>What cpu type should I use for make.conf and the kernel if I want to
    > >>use the AMD64 platform?
    > >
    > >You do not need to have anything special in make.conf, and the GENERIC
    > >kernel for amd64 contains the necessary 'machine' and 'cpu' paramaters.
    >
    > This is not entirely correct. Sure, your system will run without anything
    > special in make.conf; But if you want decent performance, you probably
    > want to set CPUTYPE to "nocona" in order to get a build that is tailored
    > to your cpu (SSE3, etc). More information on what that CPUTYPE enables is
    > available in /usr/share/mk/bsd.cpu.mk.

    You're saying that one doesn't get decent performance on a Nocona with
    stock GCC code generation? While one may get noticeably better
    performance with CPUTYPE=nocona, I doubt it is a huge difference. What
    I'm saying is, I sure one will have decent performance with a stock
    FreeBSD/amd64 install. 

    -- 
-- David  (obrien@FreeBSD.org)
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