Re: Is there a way to obtain a machine's cache line size?

[Paul Koning <paul_koning%dell.com@localhost>]

On Jan 20, 2011, at 2:47 PM, der Mouse wrote:

>> I see there is a compile time constant CACHE_LINE_SIZE in
>> <sys/param.h> which currently seems to be always be set to 64, but
>> I'm pretty certain that is not necessarily a correct value.
> 
> You are correct; to cite the one example I currently have swapped into
> my brain, the Super-H used in the Dreamcast has 32-byte cache lines
> (true of the I-cache and D-cache both).

I'm curious why non-kernel components would care.

The question also gets amusing when the cache line size varies among the 
caches.  That's not all that common, but it certainly happens.

        paul