Re: Is v2.1.x CPU bug detection accurate?
H. Peter Anvin (hpa@transmeta.com)
21 Aug 1998 02:01:39 GMT
Followup to: <199808202214.AA27975@hoover.gilbarco.com>
By author: steve_snyder@gilbarco.com (Steve Snyder)
In newsgroup: linux.dev.kernel
>
> Running kernel v2.1.117 on a RedHat 5.1 system, a display of /proc/cpuinfo shows
> me this:
>
> processor : 0
> cpu family : 5
> model : Pentium 60/66
> vendor_id : GenuineIntel
> stepping : 7
> fdiv_bug : no
> hlt_bug : no
> sep_bug : no
> f00f_bug : yes
> fpu : yes
> fpu_exception : yes
> cpuid level : 1
> wp : yes
> flags : fpu vme de pse tsc msr mce cx8
> bogomips : 23.96
>
> Note all the bugs I supposedly do *not* have. As shown above, my processor is a
> Pentium/60. This ancient Gateway box was one of the first Pentium machines on
> the market. This being the case, is it really possible that I don't have the
> fdiv bug? (This is the bug that caused a very public uproar 7 years ago.) I
> would think that this early version of the Pentium, even if it is stepping #7,
> would have most of the bugs found in the Pentium architecture.
>
Stepping 7 of the P5C (the 60/66 MHz Pentium) didn't have the FDIV
bug. Steppings 5 and below did (afaik there was no externally
released stepping 6.)
-hpa
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