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From: Ben Gamari <bgamari.foss@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: tytso@mit.edu, npiggin@suse.de, mingo@elte.hu,
	Ruald Andreae <ruald.a@gmail.com>,
	Jens Axboe <jens.axboe@oracle.com>, Olly Betts <olly@survex.com>,
	martin f krafft <madduck@madduck.net>
Subject: Re: Poor interactive performance with I/O loads with fsync()ing
Date: Sat, 27 Mar 2010 18:20:37 -0700 (PDT)	[thread overview]
Message-ID: <4baeaee5.c5c2f10a.7187.2688@mx.google.com> (raw)
In-Reply-To: <4b9fa440.12135e0a.7fc8.ffffe745@mx.google.com>

Hey all,

I have posted another profile[1] from an incident yesterday. As you can see,
both swapper and init (strange?) show up prominently in the profile. Moreover,
most processes seem to be in blk_peek_request a disturbingly large percentage
of the time. Both of these profiles were taken with 2.6.34-rc kernels.

Anyone have any ideas on how to proceed? Is more profile data necessary? Are
the existing profiles at all useful? Thanks,

- Ben

  parent reply	other threads:[~2010-03-28  1:20 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-03-16 15:31 Poor interactive performance with I/O loads with fsync()ing Ben Gamari
2010-03-17  1:24 ` tytso
2010-03-17  3:18   ` Ben Gamari
2010-03-17  3:30     ` tytso
2010-03-17  4:31       ` Ben Gamari
2010-03-26  3:16         ` Ben Gamari
2010-03-17  4:53 ` Nick Piggin
2010-03-17  9:37   ` Ingo Molnar
2010-03-26  3:31     ` Ben Gamari
2010-04-09 15:21     ` Ben Gamari
2010-03-26  3:28   ` Ben Gamari
2010-03-23 19:51 ` Jesper Krogh
2010-03-26  3:13 ` Ben Gamari
2010-03-28  1:20 ` Ben Gamari [this message]
2010-03-28  1:29   ` Ben Gamari
2010-03-28  3:42   ` Arjan van de Ven
2010-03-28 14:06     ` Ben Gamari
2010-03-28 22:08       ` Andi Kleen
2010-04-09 14:56         ` Ben Gamari
2010-04-11 15:03           ` Avi Kivity
2010-04-11 16:35             ` Ben Gamari
2010-04-11 17:20               ` Andi Kleen
2010-04-11 18:16             ` Thomas Gleixner
2010-04-11 18:42               ` Andi Kleen
2010-04-11 21:54                 ` Thomas Gleixner
2010-04-11 23:43                   ` Hans-Peter Jansen
2010-04-12  0:22               ` Dave Chinner
2010-04-14 18:40                 ` Ric Wheeler
  -- strict thread matches above, loose matches on Subject: below --
2010-03-23 11:28 Pawel S
2010-03-23 13:27 ` Jens Axboe
2010-03-26  3:35   ` Ben Gamari
2010-03-30 10:46   ` Pawel S

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