From: Andi Kleen <andi@firstfloor.org>
To: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>,
David Rientjes <rientjes@google.com>,
Andi Kleen <andi@firstfloor.org>,
tj@kernel.org, Metathronius Galabant <m.galabant@googlemail.com>,
Matt Mackall <mpm@selenic.com>,
Eric Dumazet <eric.dumazet@gmail.com>,
Adrian Drzewiecki <z@drze.net>,
linux-kernel@vger.kernel.org
Subject: Re: [slub p2 0/4] SLUB: [RFC] Per cpu partial lists V2
Date: Mon, 20 Jun 2011 21:42:36 +0200 [thread overview]
Message-ID: <20110620194236.GA32765@one.firstfloor.org> (raw)
In-Reply-To: <20110620153244.214038140@linux.com>
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.
-andi
--
ak@linux.intel.com -- Speaking for myself only.
next prev parent reply other threads:[~2011-06-20 19:42 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-20 15:32 [slub p2 0/4] SLUB: [RFC] Per cpu partial lists V2 Christoph Lameter
2011-06-20 15:32 ` [slub p2 1/4] slub: Prepare inuse field in new_slab() Christoph Lameter
2011-06-20 15:32 ` [slub p2 2/4] slub: pass kmem_cache_cpu pointer to get_partial() Christoph Lameter
2011-06-20 15:32 ` [slub p2 3/4] slub: return object pointer from get_partial() / new_slab() Christoph Lameter
2011-06-20 15:32 ` [slub p2 4/4] slub: [RFC] per cpu cache for partial pages Christoph Lameter
2011-06-20 19:42 ` Andi Kleen [this message]
2011-06-20 20:01 ` [slub p2 0/4] SLUB: [RFC] Per cpu partial lists V2 Christoph Lameter
2011-07-07 19:05 ` Pekka Enberg
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