From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756343AbbBCXTl (ORCPT ); Tue, 3 Feb 2015 18:19:41 -0500 Received: from mx1.redhat.com ([209.132.183.28]:47573 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751807AbbBCXTg (ORCPT ); Tue, 3 Feb 2015 18:19:36 -0500 Date: Wed, 4 Feb 2015 00:19:22 +0100 From: Jesper Dangaard Brouer To: Christoph Lameter Cc: Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, penberg@kernel.org, brouer@redhat.com, "netdev@vger.kernel.org" , Joonsoo Kim Subject: Re: [RFC 0/3] Slab allocator array operations Message-ID: <20150204001922.5650ca4b@redhat.com> In-Reply-To: References: <20150123213727.142554068@linux.com> <20150123145734.aa3c6c6e7432bc3534f2c4cc@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 23 Jan 2015 18:28:00 -0600 (CST) Christoph Lameter wrote: > On Fri, 23 Jan 2015, Andrew Morton wrote: > > > On Fri, 23 Jan 2015 15:37:27 -0600 Christoph Lameter wrote: > > > > > Attached a series of 3 patches to implement functionality to allocate > > > arrays of pointers to slab objects. This can be used by the slab > > > allocators to offer more optimized allocation and free paths. > > > > What's the driver for this? The networking people, I think? If so, > > some discussion about that would be useful: who is involved, why they > > have this need, who are the people we need to bug to get it tested, > > whether this implementation is found adequate, etc. Yes, networking people like me ;-) I promised Christoph that I will performance benchmark this. I'll start by writing/performing some micro benchmarks, but it first starts to get really interesting once we plug it into e.g. the networking stack, as effects as instruction-cache misses due to code size starts to play a role. > > Jesper and I gave a talk at LCA about this. LWN has an article on it. LWN: Improving Linux networking performance - http://lwn.net/Articles/629155/ - YouTube: https://www.youtube.com/watch?v=3XG9-X777Jo LWN: Toward a more efficient slab allocator - http://lwn.net/Articles/629152/ - YouTube: https://www.youtube.com/watch?v=s0lZzP1jOzI -- Best regards, Jesper Dangaard Brouer MSc.CS, Sr. Network Kernel Developer at Red Hat Author of http://www.iptv-analyzer.org LinkedIn: http://www.linkedin.com/in/brouer