cpuid - eax = 0x2

[DruG5t0r3]

I'm trying to find documentation as to the "function" number 2 of cpuid which gives information such as l2 cache size and etc. Looks like the web page on Intel's site is gone. Any help is appreciated.

[Brendan]

Hi,

I'm trying to find documentation as to the "function" number 2 of cpuid which gives information such as l2 cache size and etc. Looks like the web page on Intel's site is gone. Any help is appreciated.

Try this link (see page 17): http://bochs.sourceforge.net/techspec/24161821.pdf

Please note that other CPU manufacturers do it a different way...


Cheers,

Brendan

[DruG5t0r3]

thanks, thats like exactly what I needed. Only question is, why isn't that doc available on Intel's site?...

[smiddy]

You can also try http://sandpile.org/ia32/cpuid.htm which contains a wealth of technical information, but now description on your own algorithm development and pitfalls to watch out for.

[Brendan]

Hi,

You can also try http://sandpile.org/ia32/cpuid.htm which contains a wealth of technical information, but now description on your own algorithm development and pitfalls to watch out for.

I can probably make this easier for everyone - my OS has CPU cache detection code that it uses for determining page colours for the memory managers.

I've attached this code - no copyright and no warranties (if you use it you own it).


Cheers,

Brendan