From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with ESMTP id 65C3F6B02A3 for ; Wed, 14 Jul 2010 16:22:25 -0400 (EDT) Received: from hpaq2.eem.corp.google.com (hpaq2.eem.corp.google.com [172.25.149.2]) by smtp-out.google.com with ESMTP id o6EKMNNt005457 for ; Wed, 14 Jul 2010 13:22:23 -0700 Received: from pwi10 (pwi10.prod.google.com [10.241.219.10]) by hpaq2.eem.corp.google.com with ESMTP id o6EKMLnR007190 for ; Wed, 14 Jul 2010 13:22:22 -0700 Received: by pwi10 with SMTP id 10so8055pwi.6 for ; Wed, 14 Jul 2010 13:22:21 -0700 (PDT) Date: Wed, 14 Jul 2010 13:22:15 -0700 (PDT) From: David Rientjes 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> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org To: Christoph Lameter Cc: Heinz Diehl , Tejun Heo , Pekka Enberg , linux-mm@kvack.org, Nick Piggin , linux-kernel@vger.kernel.org List-ID: 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, 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