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

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Message-ID: <CAHH2K0aRptCxJRxMVd=zHCHHc8nT4yj0OP0JDBM=HpTbg1R60A@mail.gmail.com>
Date:	Fri, 2 Nov 2012 20:36:58 -0700
From:	Greg Thelen <gthelen@...gle.com>
To:	Glauber Costa <glommer@...allels.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	KAMEZAWA Hiroyuki <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>,
	Ying Han <yinghan@...gle.com>
Subject: Re: [PATCH v6 00/29] kmem controller for memcg.

On Fri, Nov 2, 2012 at 12:41 AM, Glauber Costa <glommer@...allels.com> wrote:
> 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?

I should have some netperf numbers next week.  Sorry I've been distracted by
other projects recently.
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