Re: Cyrix 6x86MX and Centaur C6 CPUs in 2.1.102

Riley Williams (
Tue, 26 May 1998 10:11:28 +0100 (BST)

Hi there.

>>> Yes, but for all the chips produced up to now it is equal, and
>>> for later chips we may decide based on the chip revision /
>>> manufacturer and if needed apply a TSC per sec / CPU clocks per
>>> sec ratio for the respective chip to get the correct CPU frequency.

>> Do we need to have such ugliness in the kernel? I know no reason
>> for calculating CPU clock rate in the kernel as apposed to the TSC
>> frequency which is really needed when you want to use the TSC for
>> measuring real time.

> Actually, I don't find it that ugly. And, it's true that we don't
> need it, however many users might find it useful to see what
> frequency their CPU is running on, since many BIOSes don't either
> report it, or report wrong values.

> And since there are not any processors for which TSC speed is
> different from their clock, and I doubt there will be, and since we
> need to measure the TSC speed anyway, I think its worth it to
> append it to the CPU string in the bootup messages and put it into
> /proc/cpu.

Perhaps this could be added as a set of configuration options based on
the processor selected?

Best wishes from Riley.

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