From: William Lee Irwin III <wli@holomorphy.com>
To: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Andrew Morton <akpm@osdl.org>,
shaggy@us.ibm.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: 2.6.12-mm1 & 2K lun testing (JFS problem ?)
Date: Tue, 21 Jun 2005 18:41:21 -0700 [thread overview]
Message-ID: <20050622014121.GB10690@holomorphy.com> (raw)
In-Reply-To: <1119400494.4620.33.camel@dyn9047017102.beaverton.ibm.com>
On Tue, Jun 21, 2005 at 05:34:54PM -0700, Badari Pulavarty wrote:
> Hi Andrew & Shaggy,
> Here is the summary of 2K lun testing on 2.6.12-mm1.
> When I tune dirty ratios and CFQ queue depths, things
> seems to be running fine.
> echo 20 > /proc/sys/vm/dirty_ratio
> echo 20 > /proc/sys/vm/overcommit_ratio
> echo 4 > /sys/block/<device>/queue/nr_requests
> But, I am running into JFS problem. I can't kill my
> "dd" process. They all get stuck in:
> (I am going to try ext3).
If you could get unabridged profiling data for raw vs. fs (so it can
be properly sorted) I would be interested in that. Early indications
were large amounts of time spent in shrink_zone(), obtained by
re-sorting the truncated profile listings. It indicated the time spent
in shrink_zone() was 26.3 times as much time spent in default_idle().
Typically copying to and from userspace are enormous overheads, but
aren't observable in the truncated/mis-sorted profiles, which calls
them into question, barring unreported usage of O_DIRECT. There are
also no totals reported, which are helpful for interpreting realtime
behavior.
-- wli
next prev parent reply other threads:[~2005-06-22 1:41 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-15 17:36 2.6.12-rc6-mm1 & 2K lun testing Badari Pulavarty
2005-06-15 18:30 ` Nick Piggin
2005-06-15 18:30 ` Badari Pulavarty
2005-06-15 19:02 ` Nick Piggin
2005-06-15 20:56 ` Badari Pulavarty
2005-06-16 1:48 ` Nick Piggin
2005-06-15 23:23 ` Dave Chinner
2005-06-15 21:39 ` Chen, Kenneth W
2005-06-15 22:35 ` Badari Pulavarty
2005-06-16 7:24 ` Andrew Morton
2005-06-16 19:50 ` Badari Pulavarty
2005-06-16 20:37 ` Andrew Morton
2005-06-16 23:43 ` Badari Pulavarty
2005-06-17 0:51 ` Andrew Morton
2005-06-17 15:10 ` Badari Pulavarty
2005-06-17 21:13 ` Andrew Morton
2005-06-22 0:34 ` 2.6.12-mm1 & 2K lun testing (JFS problem ?) Badari Pulavarty
2005-06-22 1:41 ` William Lee Irwin III [this message]
2005-06-22 16:23 ` Badari Pulavarty
2005-06-22 13:50 ` Dave Kleikamp
2005-06-22 16:56 ` Badari Pulavarty
2005-06-22 21:02 ` Badari Pulavarty
2005-06-16 22:42 ` 2.6.12-rc6-mm1 & 2K lun testing William Lee Irwin III
2005-06-16 22:25 ` Badari Pulavarty
2005-06-16 22:58 ` William Lee Irwin III
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