From owner-freebsd-fs@FreeBSD.ORG Mon Apr 3 19:04:24 2006 Return-Path: X-Original-To: freebsd-fs@freebsd.org Delivered-To: freebsd-fs@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B32A116A41F for ; Mon, 3 Apr 2006 19:04:24 +0000 (UTC) (envelope-from anderson@centtech.com) Received: from mh2.centtech.com (moat3.centtech.com [207.200.51.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8C88A43D60 for ; Mon, 3 Apr 2006 19:04:23 +0000 (GMT) (envelope-from anderson@centtech.com) Received: from [10.177.171.220] (neutrino.centtech.com [10.177.171.220]) by mh2.centtech.com (8.13.1/8.13.1) with ESMTP id k33J4MCP008871 for ; Mon, 3 Apr 2006 14:04:22 -0500 (CDT) (envelope-from anderson@centtech.com) Message-ID: <443171AB.3040400@centtech.com> Date: Mon, 03 Apr 2006 14:04:11 -0500 From: Eric Anderson User-Agent: Thunderbird 1.5 (X11/20060112) MIME-Version: 1.0 To: freebsd-fs@freebsd.org References: <200604030813.k338Dnne036145@lurza.secnetix.de> In-Reply-To: <200604030813.k338Dnne036145@lurza.secnetix.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV 0.87.1/1370/Mon Apr 3 12:31:59 2006 on mh2.centtech.com X-Virus-Status: Clean Subject: Re: Opinions on interesting VFS calls X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 03 Apr 2006 19:04:24 -0000 Oliver Fromme wrote: > Eric Anderson wrote: > > I'm still tinkering on a vfsstats tool in my spare time, and I've got a > > few questions for those interested: > > > > 1. What are the top ten most interesting vfs calls for statistics purposes? > > I'm not sure if this is an answer to your question, but I > would love to be able to get latency statistics from the > I/O system. For example the average latency for reading, > especially via NFS, but also local disks might be useful. > That is, min/max/average how long processes have to wait > for the NFS server (or for a local disk), in milliseconds > or whatever. As far as I know, there is currently no way > to get such statistics. Not an answer at all, but a great idea no less! Thanks! I'll think about that, and how I might toss that in too. Eric -- ------------------------------------------------------------------------ Eric Anderson Sr. Systems Administrator Centaur Technology Anything that works is better than anything that doesn't. ------------------------------------------------------------------------