linux-kernel - Re: [PATCH] slub Discard slab page only when node partials

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Date:	Thu, 15 Sep 2011 08:40:13 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	"Alex,Shi" <alex.shi@...el.com>
Cc:	"Li, Shaohua" <shaohua.li@...el.com>,
	Christoph Lameter <cl@...ux.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Huang, Ying" <ying.huang@...el.com>,
	"Chen, Tim C" <tim.c.chen@...el.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [PATCH] slub Discard slab page only when node partials > minimum setting

On Thu, Sep 8, 2011 at 5:24 AM, Alex,Shi <alex.shi@...el.com> wrote:
>> > BTW, some testing results for your PCP SLUB:
>> >
>> > for hackbench process testing:
>> > on WSM-EP, inc ~60%, NHM-EP inc ~25%
>> > on NHM-EX, inc ~200%, core2-EP, inc ~250%.
>> > on Tigerton-EX, inc 1900%, :)
>> >
>> > for hackbench thread testing:
>> > on WSM-EP, no clear inc, NHM-EP no clear inc
>> > on NHM-EX, inc 10%, core2-EP, inc ~20%.
>> > on Tigertion-EX, inc 100%,
>> >
>> > for  netperf loopback testing, no clear performance change.
>> did you add my patch to add page to partial list tail in the test?
>> Without it the per-cpu partial list can have more significant impact to
>> reduce lock contention, so the result isn't precise.
>>
>
> No, the penberg tree did include your patch on slub/partial head.
> Actually PCP won't take that path, so, there is no need for your patch.
> I daft a patch to remove some unused code in __slab_free, that related
> this, and will send it out later.

Which patch is that? Please send me it to penberg@...helsinki.fi as
@kernel.org email forward isn't working.
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