From: Dave Chinner <david@fromorbit.com>
To: Dave Hall <kdhall@binghamton.edu>
Cc: "xfs@oss.sgi.com" <xfs@oss.sgi.com>
Subject: Re: xfs_fsr, sunit, and swidth
Date: Thu, 28 Mar 2013 12:38:41 +1100 [thread overview]
Message-ID: <20130328013841.GB6369@dastard> (raw)
In-Reply-To: <515082C3.2000006@binghamton.edu>
On Mon, Mar 25, 2013 at 01:00:51PM -0400, Dave Hall wrote:
>
> Dave Hall
> Binghamton University
> kdhall@binghamton.edu
> 607-760-2328 (Cell)
> 607-777-4641 (Office)
>
>
> On 03/16/2013 03:21 AM, Dave Chinner wrote:
> >Using perf to profile the kernel while the cp -al workload is
> >running will tell use exactly where the CPU is being burnt. That
> >will confirm the analysis, or point us at some other issue that is
> >causing excessive CPU burn...
> >
> Dave, which perf command(s) would you like me to run. (I'm
> familiar with the concept behind this kind of tool, but I haven't
> worked with this one before).
Just run 'perf top -U' for 10s while the problem is occurring and
pastebin the output....
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
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prev parent reply other threads:[~2013-03-28 1:38 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-13 18:11 xfs_fsr, sunit, and swidth Dave Hall
2013-03-13 23:57 ` Dave Chinner
2013-03-14 0:03 ` Stan Hoeppner
[not found] ` <514153ED.3000405@binghamton.edu>
2013-03-14 12:26 ` Stan Hoeppner
2013-03-14 12:55 ` Stan Hoeppner
2013-03-14 14:59 ` Dave Hall
2013-03-14 18:07 ` Stefan Ring
2013-03-15 5:14 ` Stan Hoeppner
2013-03-15 11:45 ` Dave Chinner
2013-03-16 4:47 ` Stan Hoeppner
2013-03-16 7:21 ` Dave Chinner
2013-03-16 11:45 ` Stan Hoeppner
2013-03-25 17:00 ` Dave Hall
2013-03-27 21:16 ` Stan Hoeppner
2013-03-29 19:59 ` Dave Hall
2013-03-31 1:22 ` Dave Chinner
2013-04-02 10:34 ` Hans-Peter Jansen
2013-04-03 14:25 ` Dave Hall
2013-04-12 17:25 ` Dave Hall
2013-04-13 0:45 ` Dave Chinner
2013-04-13 0:51 ` Stan Hoeppner
2013-04-15 20:35 ` Dave Hall
2013-04-16 1:45 ` Stan Hoeppner
2013-04-16 16:18 ` Dave Chinner
2015-02-22 23:35 ` XFS/LVM/Multipath on a single RAID volume Dave Hall
2015-02-23 11:18 ` Emmanuel Florac
2015-02-24 22:04 ` Dave Hall
2015-02-24 22:33 ` Dave Chinner
[not found] ` <54ED01BC.6080302@binghamton.edu>
2015-02-24 23:33 ` Dave Chinner
2015-02-25 11:49 ` Emmanuel Florac
2015-02-25 11:21 ` Emmanuel Florac
2013-03-28 1:38 ` Dave Chinner [this message]
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