How to determine the L2 cache size on non-AMD CPUs (automatic
page queue color tuning)?
Alexander at Leidinger.net
Wed Jun 16 16:56:56 GMT 2004
On Wed, 16 Jun 2004 09:35:40 -0700 (PDT)
John Polstra <jdp at polstra.com> wrote:
> On 16-Jun-2004 Radek Kozlowski wrote:
> > The latest version of cpuid is from 2002 and at least for my Athlon XP-M
> > processor it doesn't read the information about L2 cache correctly.
> > IIRC, for my L2 size it only takes one byte from the beginning of ecx
> > register, whereas in my case it is stored in two, a.s.o. So I wouldn't
> > rely on cpuid when it comes to newer CPUs.
If bootverbose prints the cache size correctly (at least on -current), I
already have code which does the right thing for your AMD CPU.
> Yes, but it gives working code that generally shows how to get the
> information. Here's a link to an Intel document "Intel(R) Processor
> Idientification and the CPUID Instruction" that covers the newer CPUs:
I will have a look at both (the cpuid port and the PDF).
I'm available to get hired (preferred in .lu).
http://www.Leidinger.net Alexander @ Leidinger.net
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