From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx200.postini.com [74.125.245.200]) by kanga.kvack.org (Postfix) with SMTP id 661656B004D for ; Fri, 2 Nov 2012 04:30:08 -0400 (EDT) Received: by mail-ee0-f41.google.com with SMTP id c4so2141652eek.14 for ; Fri, 02 Nov 2012 01:30:06 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20121101170454.b7713bce.akpm@linux-foundation.org> References: <1351771665-11076-1-git-send-email-glommer@parallels.com> <20121101170454.b7713bce.akpm@linux-foundation.org> Date: Fri, 2 Nov 2012 10:30:06 +0200 Message-ID: Subject: Re: [PATCH v6 00/29] kmem controller for memcg. From: Pekka Enberg Content-Type: text/plain; charset=ISO-8859-1 Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: Glauber Costa , linux-mm@kvack.org, linux-kernel@vger.kernel.org, kamezawa.hiroyu@jp.fujitsu.com, Johannes Weiner , Tejun Heo , Michal Hocko , Christoph Lameter , David Rientjes On Fri, Nov 2, 2012 at 2:04 AM, Andrew Morton wrote: > 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. IIRC, networking guys have reduced their dependency on slab performance recently. Few simple benchmarks to run are hackbench, netperf, and Christoph's famous microbenchmarks. The sad reality is that you usually have to wait for few release cycles before people notice that you've destroyed performance of their favourite workload. :-/ -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org