From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760096Ab1LPEZN (ORCPT ); Thu, 15 Dec 2011 23:25:13 -0500 Received: from ipmail06.adl2.internode.on.net ([150.101.137.129]:49745 "EHLO ipmail06.adl2.internode.on.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751826Ab1LPEZL (ORCPT ); Thu, 15 Dec 2011 23:25:11 -0500 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Av0EAGHG6k55LOCn/2dsb2JhbABEq02BBoFyAQEEATocIwULCAMYLhQlAyETh3q5EhOLDmMElHWSQA Date: Fri, 16 Dec 2011 15:25:08 +1100 From: Dave Chinner To: Wu Fengguang Cc: "linux-fsdevel@vger.kernel.org" , LKML , Christoph Hellwig Subject: Re: XFS/btrfs performance after IO-less dirty throttling Message-ID: <20111216042508.GE23662@dastard> References: <20111214143156.GA22511@localhost> <20111215133137.GA14562@localhost> <20111216003157.GA23662@dastard> <20111216015311.GA15996@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20111216015311.GA15996@localhost> 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 Fri, Dec 16, 2011 at 09:53:11AM +0800, Wu Fengguang wrote: > I'm indeed happy that you don't care that much on that regression > introduced by me ;-) Heh. BTW, do these tests run to ENOSPC? > 10829.00 +4.3% 11296.00 TOTAL xfs:xfs_delalloc_enospc This implies that it does. If so, I'm not sure how much we can really trust these overall results because allocation and writeback speeds at ENOSPC is anything but deterministic. It will certainly have an effect (detrimental) on throughput as the filesystem gets close to full.... Cheers, Dave. -- Dave Chinner david@fromorbit.com