Date: Fri, 01 Jul 2005 08:20:58 +0300 From: Maxim Sobolev <sobomax@portaone.com> To: NAKATA Maho <chat95@mac.com> Cc: ports@FreeBSD.ORG Subject: Re: ATLAS, Prescott(P4E) and CPU detection by sysctl hw.model Message-ID: <42C4D2BA.2030103@portaone.com> In-Reply-To: <20050701.115651.74756158.chat95@mac.com> References: <20050701.115651.74756158.chat95@mac.com>
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You can do it by writing small assembler routine which uses cpuid instruction. This instruction is not privileged, so that you should not have any problems with using it from the user-level program. Refer to Intel documentation regarding how to use it properly. Also you can check /sys/i386/i386/identcpu.c to see how to use it from the C code. -Maxim NAKATA Maho wrote: > Dear all, > I'm a maintainer of math/atlas, and math/atlas-devel. > this ports automatically detects what CPU you use. > > I would like to ask you: > if we use Prescott type CPU, how can we know it is a prescott? > currently i use sysctl hw.model > > unfortunately I don't own one. > thanks in advance, > -- NAKATA, Maho (maho@FreeBSD.org) > > _______________________________________________ > freebsd-ports@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-ports > To unsubscribe, send any mail to "freebsd-ports-unsubscribe@freebsd.org" > >
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