From: Aaron Carroll <aaronc@cse.unsw.edu.au>
To: Paolo Valente <paolo.valente@unimore.it>
Cc: Jens Axboe <jens.axboe@oracle.com>, Pavel Machek <pavel@ucw.cz>,
linux-kernel@vger.kernel.org
Subject: Re: [RESEND][RFC] BFQ I/O Scheduler
Date: Thu, 17 Apr 2008 20:24:09 +1000 [thread overview]
Message-ID: <48072549.7040104@cse.unsw.edu.au> (raw)
In-Reply-To: <480709A2.7040606@unimore.it>
Paolo Valente wrote:
> In my opinion, the time-slice approach of cfq is definitely better
> suited than the (sector) budget approach for this type of workloads. On
> the opposite end, the price of time-slices is unfairness towards, e.g.,
> threads doing sequential accesses. In bfq we were mainly thinking about
How do you figure that? This is a situation where time-slices work nicely,
because they implicitly account for the performance penalty of poor access
patterns. The sequential-accessing processes (and the system overall) ends
up with higher throughput.
-- Aaron
next prev parent reply other threads:[~2008-04-17 10:29 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-01 15:29 Fabio Checconi
2008-04-15 8:22 ` Jens Axboe
2008-04-15 9:11 ` Fabio Checconi
2008-04-15 12:42 ` Jens Axboe
2008-04-15 18:08 ` Fabio Checconi
2008-04-16 6:48 ` Paolo Valente
2008-04-18 1:26 ` Aaron Carroll
2008-04-16 18:44 ` Pavel Machek
2008-04-17 6:14 ` Paolo Valente
2008-04-17 7:10 ` Jens Axboe
2008-04-17 8:26 ` Paolo Valente
2008-04-17 8:30 ` Jens Axboe
2008-04-17 9:24 ` Paolo Valente
2008-04-17 9:27 ` Jens Axboe
2008-04-17 10:19 ` Aaron Carroll
2008-04-17 10:21 ` Jens Axboe
2008-04-17 11:30 ` Fabio Checconi
2008-04-17 15:19 ` Avi Kivity
2008-04-17 15:47 ` Paolo Valente
2008-04-17 15:51 ` Avi Kivity
2008-04-17 18:12 ` Paolo Valente
2008-04-17 23:44 ` Aaron Carroll
2008-04-17 10:24 ` Aaron Carroll [this message]
2008-04-17 11:14 ` Fabio Checconi
2008-04-17 12:14 ` Aaron Carroll
2008-04-17 13:54 ` Jens Axboe
2008-04-17 15:18 ` Paolo Valente
2008-04-17 8:48 ` Pavel Machek
2008-04-17 8:57 ` Jens Axboe
2008-04-17 9:14 ` Fabio Checconi
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=48072549.7040104@cse.unsw.edu.au \
--to=aaronc@cse.unsw.edu.au \
--cc=jens.axboe@oracle.com \
--cc=linux-kernel@vger.kernel.org \
--cc=paolo.valente@unimore.it \
--cc=pavel@ucw.cz \
/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
all inboxes | Powered by JetHome®