Date: Wed, 9 Jan 2008 23:58:19 -0500 From: "J.R. Oldroyd" <fbsd@opal.com> To: freebsd-stable@freebsd.org Subject: Re: 7.0BETA4 desktop system also periodically freezes Message-ID: <20080109235819.7707133d@linwhf.opal.com> In-Reply-To: <478522B5.5030101@FreeBSD.org> References: <1199812249.96494.133.camel@predator-ii.buffyverse> <4783C8A8.2090705@raad.tartu.ee> <4783D41B.3000204@FreeBSD.org> <4783D748.1050401@raad.tartu.ee> <4783D824.1050502@FreeBSD.org> <4783DB72.6030605@raad.tartu.ee> <4783DCAA.1080108@FreeBSD.org> <4783EA7E.1050008@raad.tartu.ee> <4783ED15.1060606@FreeBSD.org> <20080109141859.74d08743@linwhf.opal.com> <478522B5.5030101@FreeBSD.org>
next in thread | previous in thread | raw e-mail | index | archive | help
--Sig_/ZGucuonwIA8tTvzQEIRs+A4 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Wed, 09 Jan 2008 20:38:29 +0100, Kris Kennaway <kris@freebsd.org> wrote: > >=20 > OK, same requests as to the others then. >=20 I presume you mean hwpmc... In setting that up, I may have stumbled upon a possible cause. I ran pmcstat for a while and ended up with a very large output file. Having not noticed any freezes during that time, I decided to start over with the output to a different filesystem with more free space. When I removed that first output file, the resulting disk i/o for the block deallocation caused a very similar freeze for a few seconds. And when it came back, the load average graph peaked up, just as before. This appears to be repeatable: 1. create a very large file, say 1Gb or so 2. remove it 3. observe freeze during file dealloc i/o activity This on an ata drive, ufs filesystem with softupdates. Folk complaining of jerky mouse syndrome (e.g., during compilations) may be seeing the same - the compiler creates and removes lots of files. I'm not sure how this would explain those longer freezes (30s or several minutes) though. =20 -jr --Sig_/ZGucuonwIA8tTvzQEIRs+A4 Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) iD8DBQFHhaXsls33urr0k4kRAriqAJ47lN9qONP4RAIlJ+4fBlkS6VIoYQCfScZN ES0m/uSjr+DrzxDx1i4iiGw= =ZxiG -----END PGP SIGNATURE----- --Sig_/ZGucuonwIA8tTvzQEIRs+A4--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20080109235819.7707133d>