Re: Discrepancies between /proc/cpuinfo and Dave J's x86info
H. Peter Anvin (hpa@zytor.com)
10 Jul 2001 21:44:42 -0700
Followup to: <p05100358b771879535bc@[207.213.214.37]>
By author: Jonathan Lundell <jlundell@pobox.com>
In newsgroup: linux.dev.kernel
>
> At 9:27 PM -0700 2001-07-10, H. Peter Anvin wrote:
> > > According to Dave J's utility the cpu's appear to be exactly the same
> >> just as the Intel boxes said when I bought them. What might be causing
> >> these values to be different. And if the BIOS is setting things up
> >> incorrectly then why does Dave J's utility show the correct values?
> >> Thanks for any help.
> >>
> >
> >/proc/cpuinfo shows "cooked" values which may be modified by the
> >kernel, depending on what it knows about CPU errata or kernel
> >capabilities.
>
> Max cpuid level doesn't get cooked by the kernel, though (at least
> not in 2.4.6).
>
> Level 3 is the Intel's CPU serial number "feature". Didn't Intel back
> off on that? Maybe that has something to do with it, and perhaps the
> utility is doing the cooking.
>
Actually, the kernel kills it if it detects it.
-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
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