Date: Wed, 16 Feb 2000 19:23:36 -0800 From: Alfred Perlstein <bright@wintelcom.net> To: Greg Lehey <grog@lemis.com> Cc: Joao Pedras <jpedras@webvolution.net>, freebsd-current@FreeBSD.ORG Subject: Re: Very slow disk transfers (was: freezing) Message-ID: <20000216192336.L3509@fw.wintelcom.net> In-Reply-To: <20000217131618.G20710@freebie.lemis.com>; from grog@lemis.com on Thu, Feb 17, 2000 at 01:16:19PM %2B1030 References: <XFMail.000217012045.jpedras@webvolution.net> <20000216175242.J3509@fw.wintelcom.net> <20000217131618.G20710@freebie.lemis.com>
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* Greg Lehey <grog@lemis.com> [000216 19:14] wrote: > On Wednesday, 16 February 2000 at 17:52:42 -0800, Alfred Perlstein wrote: > > * Joao Pedras <jpedras@webvolution.net> [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
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