Re: [slub p2 0/4] SLUB: [RFC] Per cpu partial lists V2

From: Andi Kleen
Date: Mon Jun 20 2011 - 15:42:43 EST

On Mon, Jun 20, 2011 at 10:32:44AM -0500, Christoph Lameter wrote:
> The following patchset applied on top of the lockless patchset V7. It
> introduces per cpu partial lists which allow a performance increase of
> around ~15 during contention for the nodelock (can be tested using
> hackbench).

What size system did you test it on?
> These lists help to avoid per nodelocking overhead. Allocator latency
> could be further reduced by making these operations work without
> disabling interrupts (like the fastpath and the free slowpath) as well as
> implementing better ways of handling ther cpu array with partial pages.

I think we really need better batching for the transfers.

ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
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