Re: [PATCH] Move some variables into the "most_readonly" section??

[Christoph Lameter]

On Wed, 15 Jun 2005, Andi Kleen wrote:

> > If these maps would start in the middle of a cacheline then additional 
> > cacheline fetches may become necessary to scan an array etc.
> 
> But the CPUs do prefetching anyways for that. Do you have numbers
> that this is actually worth it? 

Its not only for scanning an array. A struct may contains a lot of 
related information like for example boot_cpu_data. Aligning 
increases locality and the likelyhood that no additional cachelines have 
to be fetched.


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/