From owner-freebsd-arch Thu Jul 6 22:32:55 2000 Delivered-To: freebsd-arch@freebsd.org Received: from klapaucius.zer0.org (azazel.zer0.org [204.152.186.45]) by hub.freebsd.org (Postfix) with ESMTP id 85C3A37BBD6 for ; Thu, 6 Jul 2000 22:32:52 -0700 (PDT) (envelope-from gsutter@zer0.org) Received: (from gsutter@localhost) by klapaucius.zer0.org (8.9.3/8.9.3) id WAA25840; Thu, 6 Jul 2000 22:31:50 -0700 (PDT) (envelope-from gsutter@zer0.org) X-Authentication-Warning: klapaucius.zer0.org: gsutter set sender to gsutter@zer0.org using -f Date: Thu, 6 Jul 2000 22:31:50 -0700 From: Gregory Sutter To: Alfred Perlstein Cc: Matthew Dillon , Marius Bendiksen , freebsd-arch@FreeBSD.ORG Subject: Re: Alterations to vops Message-ID: <20000706223150.A24949@klapaucius.zer0.org> References: <200007070143.SAA96248@apollo.backplane.com> <20000706184859.C25571@fw.wintelcom.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2i In-Reply-To: <20000706184859.C25571@fw.wintelcom.net>; from bright@wintelcom.net on Thu, Jul 06, 2000 at 06:48:59PM -0700 Organization: Zer0 Sender: owner-freebsd-arch@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On 2000-07-06 18:48 -0700, Alfred Perlstein wrote: > * Matthew Dillon [000706 18:43] wrote: > >: > > I don't think it's that at all. Obviously find and cvsup eat a lot > > of *DISK* bandwidth -- all from seeking. The actual *I/O* bandwidth > > is very low (probably less then 1MByte/sec), but the disk is saturated. > > > > So I don't think we are blowing up any caches. > > > > What may be happening here is stalling in namei(). find and cvsup > > are very heavy on path lookups and that combined with seek latency > > on the drive could result in filesystem locks on directories being > > held for much longer periods of time then normal. Any other process > > trying to 'open' a file (verses reading or writing an already-open file) > > would start to stall. > > just a note: > sysctl -w vfs.vmiodirenable=1 > helps a _lot_. Could you explain what this does? Don't say "use the source"; I looked and still have no idea. :) Thanks. Greg -- Gregory S. Sutter Computing is a terminal addiction. mailto:gsutter@zer0.org http://www.zer0.org/~gsutter/ PGP DSS public key 0x40AE3052 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message