Date: Wed, 30 Jan 2013 10:56:01 -0500 From: Brett Wynkoop <wynkoop@wynn.com> To: Erich Dollansky <erichsfreebsdlist@alogt.com> Cc: freebsd-arm@freebsd.org, Ronald Klop <ronald-freebsd8@klop.yi.org> Subject: Re: disk wait mystery Message-ID: <20130130105601.3413fd92@ivory.lan> In-Reply-To: <20130130175236.402435ce@X220.ovitrap.com> References: <20130130001849.7669e033@ivory.lan> <op.wrpw4bjv8527sy@ronaldradial.versatec.local> <20130130053729.0c9e018f@ivory.lan> <20130130175236.402435ce@X220.ovitrap.com>
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On Wed, 30 Jan 2013 17:52:36 +0700 Erich Dollansky <erichsfreebsdlist@alogt.com> wrote: > how I understand the system, I would say that these tasks are all > swapped out to disk. > > Erich Probably not swapped out: wynkoop@beaglebone:~ % pstat -s Device 1K-blocks Used Avail Capacity /dev/md0 788480 184 788296 0% wynkoop@beaglebone:~ % I think Oliver must have hit upon the right answer, as I do see similar results on my other FreeBSD boxes. I just never really paid attention to it as my other boxes are running many more things and are swapping. Thanks Oliver. Too bad kernel threads that are busy show up as disk wait when no disk i/o is involved. Well in that fantasy land where I am a kernel hacker (LOL) I guess I can code in a different code for non-disk based waits! -Brett -- wynkoop@wynn.com http://prd4.wynn.com/wynkoop/pgp-keys.txt 917-642-6925 718-717-5435 "The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government" - Thomas Jefferson.
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