linux-kernel - Re: [PATCH v6 00/29] kmem controller for memcg.

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Message-ID: <50937918.7080302@parallels.com>
Date:	Fri, 2 Nov 2012 11:41:12 +0400
From:	Glauber Costa <glommer@...allels.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	<linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
	<kamezawa.hiroyu@...fujitsu.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Tejun Heo <tj@...nel.org>, Michal Hocko <mhocko@...e.cz>,
	Christoph Lameter <cl@...ux.com>,
	Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Greg Thelen <gthelen@...gle.com>
Subject: Re: [PATCH v6 00/29] kmem controller for memcg.

On 11/02/2012 04:04 AM, Andrew Morton wrote:
> On Thu,  1 Nov 2012 16:07:16 +0400
> Glauber Costa <glommer@...allels.com> wrote:
> 
>> Hi,
>>
>> This work introduces the kernel memory controller for memcg. Unlike previous
>> submissions, this includes the whole controller, comprised of slab and stack
>> memory.
> 
> I'm in the middle of (re)reading all this.  Meanwhile I'll push it all
> out to http://ozlabs.org/~akpm/mmots/ for the crazier testers.
> 
> One thing:
> 
>> Numbers can be found at https://lkml.org/lkml/2012/9/13/239
> 
> You claim in the above that the fork worload is 'slab intensive".  Or
> at least, you seem to - it's a bit fuzzy.
> 
> But how slab intensive is it, really?
> 
> What is extremely slab intensive is networking.  The networking guys
> are very sensitive to slab performance.  If this hasn't already been
> done, could you please determine what impact this has upon networking? 
> I expect Eric Dumazet, Dave Miller and Tom Herbert could suggest
> testing approaches.
> 

I can test it, but unfortunately I am unlikely to get to prepare a good
environment before Barcelona.

I know, however, that Greg Thelen was testing netperf in his setup.
Greg, do you have any publishable numbers you could share?
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