From: Jens Axboe <jens.axboe@oracle.com>
To: Alan.Brunelle@pobox.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH 5/15] cfq-iosched: speed up rbtree handling
Date: Wed, 25 Apr 2007 19:15:40 +0200 [thread overview]
Message-ID: <20070425171539.GE4730@kernel.dk> (raw)
In-Reply-To: <462F7AD9.8020300@hp.com>
On Wed, Apr 25 2007, Alan D. Brunelle wrote:
> Hi Jens -
>
> The attached patch speeds it up even more - I'm finding a >9% reduction
> in %system with no loss in IO performance. This just sets the cached
> element when the first is looked for.
Interesting, good thinking. It should not change the IO pattern, as the
end result should be the same. Thanks Alan, will commit!
I'll give elevator.c the same treatment, should be even more beneficial.
Stay tuned for a test patch.
--
Jens Axboe
next prev parent reply other threads:[~2007-04-25 17:19 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-24 8:15 [PATCH 0/15] CFQ IO scheduler patch series Jens Axboe
2007-04-24 8:15 ` [PATCH 1/15] cfq-iosched: improve preemption for cooperating tasks Jens Axboe
2007-04-24 8:15 ` [PATCH 2/15] cfq-iosched: development update Jens Axboe
2007-04-24 8:15 ` [PATCH 3/15] cfq-iosched: minor updates Jens Axboe
2007-04-24 8:15 ` [PATCH 4/15] cfq-iosched: rework the whole round-robin list concept Jens Axboe
2007-04-24 8:15 ` [PATCH 5/15] cfq-iosched: speed up rbtree handling Jens Axboe
2007-04-25 15:59 ` Alan D. Brunelle
2007-04-25 17:15 ` Jens Axboe [this message]
2007-04-25 17:50 ` Jens Axboe
2007-04-25 18:08 ` Jens Axboe
2007-04-26 14:28 ` Alan D. Brunelle
2007-04-26 15:46 ` Jens Axboe
2007-04-24 8:15 ` [PATCH 6/15] cfq-iosched: sort RT queues into the rbtree Jens Axboe
2007-04-24 8:15 ` [PATCH 7/15] cfq-iosched: sort IDLE " Jens Axboe
2007-04-24 8:15 ` [PATCH 8/15] cfq-iosched: style cleanups and comments Jens Axboe
2007-04-24 8:15 ` [PATCH 9/15] cfq-iosched: slice offset should take ioprio into account Jens Axboe
2007-04-24 8:15 ` [PATCH 10/15] cfq-iosched: get rid of ->cur_rr and ->cfq_list Jens Axboe
2007-04-24 8:15 ` [PATCH 11/15] cfq-iosched: don't pass unused preemption variable around Jens Axboe
2007-04-24 8:15 ` [PATCH 12/15] cfq-iosched: get rid of ->dispatch_slice Jens Axboe
2007-04-24 8:15 ` [PATCH 13/15] cfq-iosched: never allow an async queue idling Jens Axboe
2007-04-24 8:15 ` [PATCH 14/15] cfq-iosched: improve sync vs async workloads Jens Axboe
2007-04-24 8:15 ` [PATCH 15/15] cfq-iosched: tighten queue request overlap condition Jens Axboe
2007-04-25 14:42 ` [PATCH 0/15] CFQ IO scheduler patch series Alan D. Brunelle
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20070425171539.GE4730@kernel.dk \
--to=jens.axboe@oracle.com \
--cc=Alan.Brunelle@pobox.com \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox