From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (Postfix) with ESMTP id DA1D27F52 for ; Wed, 27 Mar 2013 20:38:44 -0500 (CDT) Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by relay2.corp.sgi.com (Postfix) with ESMTP id B315E30408C for ; Wed, 27 Mar 2013 18:38:44 -0700 (PDT) Received: from ipmail06.adl6.internode.on.net (ipmail06.adl6.internode.on.net [150.101.137.145]) by cuda.sgi.com with ESMTP id ahEq8Dpb3ihJVZdC for ; Wed, 27 Mar 2013 18:38:43 -0700 (PDT) Date: Thu, 28 Mar 2013 12:38:41 +1100 From: Dave Chinner Subject: Re: xfs_fsr, sunit, and swidth Message-ID: <20130328013841.GB6369@dastard> References: <514113C6.9090602@hardwarefreak.com> <514153ED.3000405@binghamton.edu> <5141C1FC.4060209@hardwarefreak.com> <5141C8C1.2080903@hardwarefreak.com> <5141E5CF.10101@binghamton.edu> <5142AE40.6040408@hardwarefreak.com> <20130315114538.GF6369@dastard> <5143F94C.1020708@hardwarefreak.com> <20130316072126.GG6369@dastard> <515082C3.2000006@binghamton.edu> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <515082C3.2000006@binghamton.edu> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: Dave Hall Cc: "xfs@oss.sgi.com" On Mon, Mar 25, 2013 at 01:00:51PM -0400, Dave Hall wrote: > > Dave Hall > Binghamton University > kdhall@binghamton.edu > 607-760-2328 (Cell) > 607-777-4641 (Office) > > > On 03/16/2013 03:21 AM, Dave Chinner wrote: > >Using perf to profile the kernel while the cp -al workload is > >running will tell use exactly where the CPU is being burnt. That > >will confirm the analysis, or point us at some other issue that is > >causing excessive CPU burn... > > > Dave, which perf command(s) would you like me to run. (I'm > familiar with the concept behind this kind of tool, but I haven't > worked with this one before). Just run 'perf top -U' for 10s while the problem is occurring and pastebin the output.... Cheers, Dave. -- Dave Chinner david@fromorbit.com _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs