From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752475Ab3AATPm (ORCPT ); Tue, 1 Jan 2013 14:15:42 -0500 Received: from mail-pb0-f50.google.com ([209.85.160.50]:35105 "EHLO mail-pb0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752412Ab3AATPk (ORCPT ); Tue, 1 Jan 2013 14:15:40 -0500 Date: Tue, 1 Jan 2013 11:15:06 -0800 From: Kent Overstreet To: john.wensley@gmail.com Cc: fa.linux.kernel@googlegroups.com, linux-kernel@vger.kernel.org, linux-aio@kvack.org, Zach Brown , bcrl@kvack.org, jmoyer@redhat.com, axboe@kernel.dk, viro@zeniv.linux.org.uk, tytso@mit.edu Subject: Re: [PATCH 03/32] gadget: remove only user of aio retry Message-ID: <20130101191506.GE10411@moria.home.lan> References: <9d57e984-32bd-4d94-8137-6aeec4cf5986@googlegroups.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9d57e984-32bd-4d94-8137-6aeec4cf5986@googlegroups.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Dec 29, 2012 at 12:19:10AM -0800, john.wensley@gmail.com wrote: > On Thursday, December 27, 2012 4:08:46 AM UTC+2, Kent Overstreet wrote: > ... > > Great. Did you measure by how much your changes improve performance? This particular patch? No. As for the whole series, Jens has done the best actual benchmarks; mostly I've just been looking at profiles - I don't have any high end hardware with drivers suitable for that kind of benchmarking, myself. Also, my changes have been particularly aimed at improving the situation where an ioctx is shared between different threads; we don't have any actual benchmarks for how much that's improved as fio doesn't do that but the gains there are going to be much more significant, for applications where that's useful.