Messages in this thread | | | Subject | Re: CyrixInstead ? | From | Nicolai P Guba <> | Date | 03 Aug 1998 09:39:37 +0100 |
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"ADB" == Andrew Derrick Balsa <andrebalsa@altern.org> writes:
ADB> Hello Nicolai, Hi
>> Hmmm, I've gotten a Cyrix 6x86 (IBM actually) and compiled kernels as >> Pentium/6x86 and never got my CPU identified correctly (unknown).
ADB> On 2.1.112 you can compile your kernel as a 386, 486, 586 or 686 and ADB> you will still get correct identification of your Cyrix 6x86. >> Now I compiled (2.1.112) as 486 and voila,
ADB> Hmmm, you were probably using an older kernel previously. Note that the ADB> recommended setting for the 6x86 is to compile as a Pentium, PPro or as ADB> a last resort, as a 386. Compiling as a 486 diminishes kernel ADB> performance because of the extra padding needed on 486-class CPUs. I know that. But I had tried it to see whether the kernels detected the 6x86 cpu's if I compiled them as a lower spec. There was absolutely no chance getting the cpu detected when compiled as Pentium --which is why I send the message in the first place.
ADB> Looks OK to me. :-) That was the correct output. The other junst says unknown.
ADB> This is the desired behaviour and the 6x86 is a Pentium class ADB> processor. In fact at the same clock rate it provides roughly 10% ADB> better kernel performance than a Pentium. Your 133MHz 6x86 is roughly ADB> equivalent to a 150MHz Pentium, in terms of kernel performance. I believe that my output has confused you.
ADB> Please compile your 2.1.112 kernel as a Pentium processor and you will ADB> notice the CPU is (correctly) identified as above. There is no need to ADB> compile as a 486 (and it is not desirable either); the menuconfig and ADB> xconfig information is correct. Nope, I wasn't. That was precisely my point ;)
-- Nicolai P Guba, BSc(Hons) BT Networks and Systems Managerial Professional Grade Applied Research and Technology BT Research Laboratories Distributed Systems Group Martlesham Heath, Suffolk IP5 3RE pp B54/R73
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