How to determine the L2 cache size on non-AMD CPUs (automatic
page queue color tuning)?
jdp at polstra.com
Wed Jun 16 16:36:06 GMT 2004
On 16-Jun-2004 Radek Kozlowski wrote:
> On 2004.06.16 18:11, John Polstra wrote:
>> Check out the "misc/cpuid" port. Here's some sample output from a
>> PIII system. Cache information is at the end.
> 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.
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:
More information about the freebsd-current