From owner-freebsd-current Wed Feb 16 18:55:40 2000 Delivered-To: freebsd-current@freebsd.org Received: from builder.freebsd.org (builder.FreeBSD.ORG [204.216.27.24]) by hub.freebsd.org (Postfix) with ESMTP id 13D5337B5E4 for ; Wed, 16 Feb 2000 18:55:36 -0800 (PST) (envelope-from bright@fw.wintelcom.net) Received: from fw.wintelcom.net (ns1.wintelcom.net [209.1.153.20]) by builder.freebsd.org (Postfix) with ESMTP id BE257132D6 for ; Wed, 16 Feb 2000 18:54:56 -0800 (PST) Received: (from bright@localhost) by fw.wintelcom.net (8.9.3/8.9.3) id TAA20763; Wed, 16 Feb 2000 19:23:36 -0800 (PST) Date: Wed, 16 Feb 2000 19:23:36 -0800 From: Alfred Perlstein To: Greg Lehey Cc: Joao Pedras , freebsd-current@FreeBSD.ORG Subject: Re: Very slow disk transfers (was: freezing) Message-ID: <20000216192336.L3509@fw.wintelcom.net> References: <20000216175242.J3509@fw.wintelcom.net> <20000217131618.G20710@freebie.lemis.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0.1i In-Reply-To: <20000217131618.G20710@freebie.lemis.com>; from grog@lemis.com on Thu, Feb 17, 2000 at 01:16:19PM +1030 Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG * Greg Lehey [000216 19:14] wrote: > On Wednesday, 16 February 2000 at 17:52:42 -0800, Alfred Perlstein wrote: > > * Joao Pedras [000216 17:50] wrote: > >> Hello all > >> > >> While making -j 4 buildworld and moving a netscape window, everything frozen. > >> Happens often if do other things while cpu and disk are very active. > >> > >> Happens quite often. > >> > >> Anyone else has noticed this ? > > > > Do you mean dead frozen, as in needs a reboot? or frozen for a second or > > so? > > > > The first one I haven't seen recently, the second I have noticed. > > I'm seeing the second situation. I've been following it up and find > that I have a number of requests which take an inordinate amount of > time in the driver strategy routine: > > Feb 17 12:50:00 freebie /kernel: Request took 10.373469 seconds, dev 3.31, block 5468256, length 16384 > > The time here is between entering adstrategy (in this case) and > biodone. It happens on SCSI drives too, so it doesn't appear to be a > problem with a specific driver. If anybody has a suggestion what I > should look for next, I'd be grateful. Could you put up a patchset against -current up someplace that includes these diagnostics? I'd like to see if that's what's nailing me. thanks, -Alfred To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message