Re: [PATCH] slob: reduce list scanning

[Nick Piggin <nickpiggin@yahoo.com.au>]

Pekka Enberg wrote:
> On 7/16/07, Nick Piggin <nickpiggin@yahoo.com.au> wrote:
>
> > Actually SLOB potentially has some fundamental CPU cache hotness
> > advantages over the other allocators, for the same reasons as
> > its space advantages.
>
> Because consecutive allocations hit the same cache-hot page regardless
> of requested size where as SLUB by definition distributes allocations
> to different pages (some of which may not be hot)?
Yeah, that, and also a newly freed slab object is quite likely to be
hot, and that memory can be used by another subsequent allocation --
not always, because the allocation heuristics may not place it there,
but there is potential that is impossible with slab allocators.

--
SUSE Labs, Novell Inc.
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