From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751372AbWCaOt6 (ORCPT ); Fri, 31 Mar 2006 09:49:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751373AbWCaOt5 (ORCPT ); Fri, 31 Mar 2006 09:49:57 -0500 Received: from 209-166-240-202.cust.walrus.com ([209.166.240.202]:32173 "EHLO mail1.telemetry-investments.com") by vger.kernel.org with ESMTP id S1751372AbWCaOt5 (ORCPT ); Fri, 31 Mar 2006 09:49:57 -0500 Date: Fri, 31 Mar 2006 09:49:51 -0500 From: "Bill Rugolsky Jr." To: Jakob Oestergaard , Trond Myklebust , linux-kernel@vger.kernel.org Subject: Re: NFS client (10x) performance regression 2.6.14.7 -> 2.6.15 Message-ID: <20060331144951.GA9207@ti64.telemetry-investments.com> Reply-To: "Bill Rugolsky Jr." Mail-Followup-To: "Bill Rugolsky Jr." , Jakob Oestergaard , Trond Myklebust , linux-kernel@vger.kernel.org References: <20060331094850.GF9811@unthought.net> <1143807770.8096.4.camel@lade.trondhjem.org> <20060331124518.GH9811@unthought.net> <1143810392.8096.11.camel@lade.trondhjem.org> <20060331132131.GI9811@unthought.net> <1143812658.8096.18.camel@lade.trondhjem.org> <20060331140816.GJ9811@unthought.net> <1143814889.8096.22.camel@lade.trondhjem.org> <20060331143500.GK9811@unthought.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060331143500.GK9811@unthought.net> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Mar 31, 2006 at 04:35:00PM +0200, Jakob Oestergaard wrote: > I'm wondering... Can anyone else reproduce this problem? > > Just to explain quickly: > Running nfsbench (on the NFS client) once with LEADING_EMPTY_SPACE set > to 0 and then once with the option set to 1. If there's a big change > in wall-clock execution time, this indicates that the problem exists. > > I'd be really interested in knowing whether I'm the only one who sees > this problem. Jakob, Your NFS setup is specific to your system. Have you considered trying this over loopback to narrow down the variables? If you see similar getattr/write behavior over loopback, it will make it easy for everyone else to test. -Bill