Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756463Ab2KBIaK (ORCPT ); Fri, 2 Nov 2012 04:30:10 -0400 Received: from mail-ee0-f46.google.com ([74.125.83.46]:54888 "EHLO mail-ee0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754296Ab2KBIaI (ORCPT ); Fri, 2 Nov 2012 04:30:08 -0400 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 X-Google-Sender-Auth: tpDiSxVo2gZFizqZP63-q8VZthk Message-ID: Subject: Re: [PATCH v6 00/29] kmem controller for memcg. From: Pekka Enberg 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 Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1207 Lines: 28 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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/