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Re: cpuinfo cache size


Corinna Vinschen <corinna-cygwin <at> cygwin.com> writes:
> Cygwin is lacking the code to fetch L3 caches and afaics, it's not
> overly simple.  At least calling cpuid as for L1 and L2 caches is not
> sufficient, apparently.

If you can use the Windows API, then this
https://msdn.microsoft.com/en-us/library/ms683194.aspx

> > Should be possible to have both info available ?
> > Any idea how to obtain the other cache infos ?
> 
> Not completely.  You have to use different cpuid codes for AMD and Intel
> CPUs, and you have to call cpuid multiple times to get the full info
> for all L3 caches of the system's CPUs, but I'm fuzzy on the details.

I have no patches, but another difference to Linux is that the CPU frequency
reported is the maximum (non-turbo) frequency instead of the actual one
(which could be larger or lower depending on the frequency scaling in
effect).  That seems to require more infrastructure, though.


Regards,
Achim.



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