Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757516Ab0GNUW1 (ORCPT ); Wed, 14 Jul 2010 16:22:27 -0400 Received: from smtp-out.google.com ([216.239.44.51]:28051 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755809Ab0GNUWZ (ORCPT ); Wed, 14 Jul 2010 16:22:25 -0400 DomainKey-Signature: a=rsa-sha1; s=beta; d=google.com; c=nofws; q=dns; h=date:from:x-x-sender:to:cc:subject:in-reply-to:message-id: references:user-agent:mime-version:content-type:x-system-of-record; b=qdFW6VWTa2vCg+qx7LHfEz6xyB2IVznC6b7ZnpuvYt7iQWw/8WtceNiXQKdWLioZd DwsjJ6rc/aBbJv7WJ82wA== Date: Wed, 14 Jul 2010 13:22:15 -0700 (PDT) From: David Rientjes X-X-Sender: rientjes@chino.kir.corp.google.com To: Christoph Lameter cc: Heinz Diehl , Tejun Heo , Pekka Enberg , linux-mm@kvack.org, Nick Piggin , linux-kernel@vger.kernel.org Subject: Re: [S+Q2 00/19] SLUB with queueing (V2) beats SLAB netperf TCP_RR In-Reply-To: Message-ID: References: <20100709190706.938177313@quilx.com> <20100710195621.GA13720@fancy-poultry.org> <20100712163900.GA8513@fancy-poultry.org> <20100713135650.GA6444@fancy-poultry.org> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-System-Of-Record: true Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 992 Lines: 22 On Tue, 13 Jul 2010, Christoph Lameter wrote: > > > Can you get us the config file. What is the value of > > > PERCPU_DYMAMIC_EARLY_SIZE? > > > > My .config file is attached. I don't know how to find out what value > > PERCPU_DYNAMIC_EARLY_SIZE is actually on, how could I do that? There's > > no such thing in my .config. > > I dont see anything in there at first glance that would cause slub to > increase its percpu usage. This is straight upstream? > The problem is that he has CONFIG_NODES_SHIFT=10 and struct kmem_cache has an array of struct kmem_cache_node pointers with MAX_NUMNODES entries which blows its size up to over 8K. That's probably overkill for his quad-core 8GB AMD, so I'd recommend lowering CONFIG_NODES_SHIFT to 6. -- 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/