Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261793AbVDKNrK (ORCPT ); Mon, 11 Apr 2005 09:47:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261794AbVDKNrK (ORCPT ); Mon, 11 Apr 2005 09:47:10 -0400 Received: from unthought.net ([212.97.129.88]:42927 "EHLO unthought.net") by vger.kernel.org with ESMTP id S261793AbVDKNrE (ORCPT ); Mon, 11 Apr 2005 09:47:04 -0400 Date: Mon, 11 Apr 2005 15:47:03 +0200 From: Jakob Oestergaard To: Trond Myklebust Cc: Greg Banks , linux-kernel@vger.kernel.org Subject: Re: bdflush/rpciod high CPU utilization, profile does not make sense Message-ID: <20050411134703.GC13369@unthought.net> Mail-Followup-To: Jakob Oestergaard , Trond Myklebust , Greg Banks , linux-kernel@vger.kernel.org References: <20050406160123.GH347@unthought.net> <20050406231906.GA4473@sgi.com> <20050407153848.GN347@unthought.net> <1112890671.10366.44.camel@lade.trondhjem.org> <20050409213549.GW347@unthought.net> <1113083552.11982.17.camel@lade.trondhjem.org> <20050411074806.GX347@unthought.net> <1113222939.14281.17.camel@lade.trondhjem.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1113222939.14281.17.camel@lade.trondhjem.org> User-Agent: Mutt/1.3.28i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1268 Lines: 40 On Mon, Apr 11, 2005 at 08:35:39AM -0400, Trond Myklebust wrote: ... > That certainly shouldn't be the case (and isn't on any of my setups). Is > the behaviour identical same on both the PIII and the Opteron systems? The dual opteron is the nfs server The dual athlon is the 2.4 nfs client The dual PIII is the 2.6 nfs client > As for the WRITE rates, could you send me a short tcpdump from the > "sequential write" section of the above test? Just use "tcpdump -s 90000 > -w binary.dmp" just for a couple of seconds. I'd like to check the > latencies, and just check that you are indeed sending unstable writes > with not too many commit or getattr calls. Certainly; http://unthought.net/binary.dmp.bz2 I got an 'invalid snaplen' with the 90000 you suggested, the above dump is done with 9000 - if you need another snaplen please just let me know. A little explanation for the IPs you see; sparrow/10.0.1.20 - nfs server raven/10.0.1.7 - 2.6 nfs client osprey/10.0.1.13 - NIS/DNS server Thanks, -- / jakob - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/