From owner-freebsd-current Tue Feb 4 15:59:10 2003 Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0529937B401; Tue, 4 Feb 2003 15:59:09 -0800 (PST) Received: from excalibur.skynet.be (excalibur.skynet.be [195.238.3.90]) by mx1.FreeBSD.org (Postfix) with ESMTP id D159343F43; Tue, 4 Feb 2003 15:59:07 -0800 (PST) (envelope-from brad.knowles@skynet.be) Received: from [146.106.12.76] (ip-26.shub-internet.org [194.78.144.26] (may be forged)) by excalibur.skynet.be (8.12.7/8.12.7/Skynet-OUT-2.21) with ESMTP id h14NwrtT019288; Wed, 5 Feb 2003 00:58:58 +0100 (MET) (envelope-from ) Mime-Version: 1.0 X-Sender: bs663385@pop.skynet.be Message-Id: In-Reply-To: <25779.1044395087@critter.freebsd.dk> References: <25779.1044395087@critter.freebsd.dk> Date: Wed, 5 Feb 2003 00:04:30 +0100 To: Poul-Henning Kamp From: Brad Knowles Subject: Re: Preview: GEOMs statistics code. Cc: current@freebsd.org Content-Type: text/plain; charset="us-ascii" ; format="flowed" Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG At 10:44 PM +0100 2003/02/04, Poul-Henning Kamp wrote: > In difference from the devstat framework which measures how big a > percentage of the time a drive has one or more outstanding requests, > I think that measuring the responstime is a much more useful metric. > (comments, input, references welcome) This is queue depth versus latency, right? I don't suppose a request to provide both would hold any weight with you, would it? -- Brad Knowles, "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." -Benjamin Franklin, Historical Review of Pennsylvania. GCS/IT d+(-) s:+(++)>: a C++(+++)$ UMBSHI++++$ P+>++ L+ !E-(---) W+++(--) N+ !w--- O- M++ V PS++(+++) PE- Y+(++) PGP>+++ t+(+++) 5++(+++) X++(+++) R+(+++) tv+(+++) b+(++++) DI+(++++) D+(++) G+(++++) e++>++++ h--- r---(+++)* z(+++) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message