Re: How to determine what portion of memory is cached?

Mike A. Harris (mharris@meteng.on.ca)
Wed, 10 Nov 1999 19:18:17 -0500 (EST)

On Wed, 10 Nov 1999, Alan Cox wrote:

>> Is there a way in the kernel startup code (or anywhere in kernel
>> for that matter) to determine what portions of physical system
>> RAM are cached?
>
>The extended memory queries from the BIOS (E820) do actually provide this
>information if I remember rightly

Hmm.. I just checked Ralf Brown's out and E820 doesn't appear to
give cache info, or if it does, then the returned data would be
"reserved" according to the INT list.

Does anyone have more comprehensive (if that is possible) info on
the E820 BIOS calls?

Is it possible to read this info from the chipset itself?
Granted, it would be chipset specific likely, but that is ok...

;o)

Thanks for the hint Alan.
TTYL

--
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