Date: Wed, 30 Jan 2013 05:37:29 -0500 From: Brett Wynkoop <wynkoop@wynn.com> To: "Ronald Klop" <ronald-freebsd8@klop.yi.org> Cc: freebsd-arm@freebsd.org Subject: Re: disk wait mystery Message-ID: <20130130053729.0c9e018f@ivory.lan> In-Reply-To: <op.wrpw4bjv8527sy@ronaldradial.versatec.local> References: <20130130001849.7669e033@ivory.lan> <op.wrpw4bjv8527sy@ronaldradial.versatec.local>
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On Wed, 30 Jan 2013 10:39:37 +0100
"Ronald Klop" <ronald-freebsd8@klop.yi.org> wrote:
> On Wed, 30 Jan 2013 06:18:49 +0100, Brett Wynkoop <wynkoop@wynn.com>
> wrote:
>
> > Greeting-
> >
> > Can anyone figure out why a mainly idle bone with only 2 user
> > shells via ssh running would have so much in disk wait?
> >
> > wynkoop@beaglebone:~ % !ps
> > ps ax
> > PID TT STAT TIME COMMAND
> > 0 - DLs 0:00.02 [kernel]
> > 1 - ILs 0:00.20 /sbin/init --
> > 2 - DL 0:00.00 [xpt_thrd]
> > 3 - DL 0:01.92 [task: mmc/sd card]
> > 4 - DL 0:00.01 [pagedaemon]
> > 5 - DL 0:00.00 [vmdaemon]
> > 6 - DL 0:00.00 [pagezero]
> > 7 - DL 0:00.02 [bufdaemon]
> > 8 - DL 0:00.02 [vnlru]
> > 9 - DL 0:00.10 [syncer]
> > 10 - RL 17:15.90 [idle]
> > 11 - WL 0:07.91 [intr]
> > 12 - DL 0:00.17 [geom]
> > 13 - DL 0:00.21 [yarrow]
> > 14 - DL 0:00.06 [softdepflush]
> > 15 - DL 0:00.15 [schedcpu]
> > 106 - DL 0:00.00 [md0]
> > 410 - Is 0:00.06 dhclient: cpsw0 [priv] (dhclient)
> > 448 - Is 0:00.07 dhclient: cpsw0 (dhclient)
> > 449 - Is 0:00.01 /sbin/devd
> > 634 - Is 0:00.04 /usr/sbin/sshd
> > 638 - Is 0:00.55 /usr/sbin/cron -s
> > 682 - Is 0:00.64 sshd: wynkoop [priv] (sshd)
> > 685 - S 0:00.29 sshd: wynkoop@pts/0 (sshd)
> > 678 u0 Is+ 0:00.19 /usr/libexec/getty std.9600 ttyu0
> > 686 0 Ss 0:00.74 -csh (csh)
> > 831 0 R+ 0:00.16 ps ax
> > wynkoop@beaglebone:~ %
> >
> > -Brett
> >
>
> Hi,
>
> Maybe I missed a previous email, but you don't provide much
> information for people to think about.
> As a start you might show the 'disk wait' output.
>
> Ronald.
>
Ronald-
From the ps man page:
D Marks a process in disk (or other short term,
uninterruptible) wait.
Note all the D entries in the above ps output.
-Brett
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