From: Linus Torvalds <torvalds@linux-foundation.org>
To: Bart Van Assche <bart.vanassche@gmail.com>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>,
FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>,
Vladislav Bolkhovitin <vst@vlnb.net>,
Vu Pham <vuhuong@mellanox.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-scsi@vger.kernel.org, scst-devel@lists.sourceforge.net,
linux-kernel@vger.kernel.org,
"Nicholas A. Bellinger" <nab@linux-iscsi.org>
Subject: Re: Integration of SCST in the mainstream Linux kernel
Date: Tue, 5 Feb 2008 10:18:11 -0800 (PST) [thread overview]
Message-ID: <alpine.LFD.1.00.0802051016240.9374@woody.linux-foundation.org> (raw)
In-Reply-To: <e2e108260802050825u68ef2ee9m6e085acb6b474fe@mail.gmail.com>
On Tue, 5 Feb 2008, Bart Van Assche wrote:
>
> Results that I did not expect:
> * A block transfer size of 1 MB is not enough to measure the maximal
> throughput. The maximal throughput is only reached at much higher
> block sizes (about 10 MB for SCST + SRP and about 100 MB for STGT +
> iSER).
Block transfer sizes over about 64kB are totally irrelevant for 99% of all
people.
Don't even bother testing anything more. Yes, bigger transfers happen, but
a lot of common loads have *smaller* transfers than 64kB.
So benchmarks that try to find "theoretical throughput" by just making big
transfers should just be banned. They give numbers, yes, but the numbers
are pointless.
Linus
next prev parent reply other threads:[~2008-02-05 18:19 UTC|newest]
Thread overview: 147+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-23 14:22 Bart Van Assche
2008-01-23 17:11 ` Vladislav Bolkhovitin
2008-01-29 20:42 ` James Bottomley
2008-01-29 21:31 ` Roland Dreier
2008-01-29 23:32 ` FUJITA Tomonori
2008-01-30 1:15 ` [Scst-devel] " Vu Pham
2008-01-30 8:38 ` Bart Van Assche
2008-01-30 10:56 ` FUJITA Tomonori
2008-01-30 11:40 ` Vladislav Bolkhovitin
2008-01-30 13:10 ` Bart Van Assche
2008-01-30 13:54 ` FUJITA Tomonori
2008-01-31 7:48 ` Bart Van Assche
2008-01-31 13:25 ` Nicholas A. Bellinger
2008-01-31 14:34 ` Bart Van Assche
2008-01-31 14:44 ` Nicholas A. Bellinger
2008-01-31 15:50 ` Vladislav Bolkhovitin
2008-01-31 16:25 ` [Scst-devel] " Joe Landman
2008-01-31 17:08 ` Bart Van Assche
2008-01-31 17:13 ` Joe Landman
2008-01-31 18:12 ` David Dillow
2008-02-01 11:50 ` Vladislav Bolkhovitin
2008-02-01 11:50 ` Vladislav Bolkhovitin
2008-02-01 12:25 ` Vladislav Bolkhovitin
2008-01-31 17:14 ` Nicholas A. Bellinger
2008-01-31 17:40 ` Bart Van Assche
2008-01-31 18:15 ` Nicholas A. Bellinger
2008-02-01 9:08 ` Bart Van Assche
2008-02-01 8:11 ` Bart Van Assche
2008-02-01 10:39 ` Nicholas A. Bellinger
2008-02-01 11:04 ` Bart Van Assche
2008-02-01 12:05 ` Nicholas A. Bellinger
2008-02-01 13:25 ` Bart Van Assche
2008-02-01 14:36 ` Nicholas A. Bellinger
2008-01-30 16:34 ` James Bottomley
2008-01-30 16:50 ` Bart Van Assche
2008-02-02 15:32 ` Pete Wyckoff
2008-02-05 17:01 ` Erez Zilber
2008-02-06 12:16 ` Bart Van Assche
2008-02-06 16:45 ` Benny Halevy
2008-02-06 17:06 ` Roland Dreier
2008-02-18 9:43 ` Erez Zilber
2008-02-18 11:01 ` Bart Van Assche
2008-02-20 7:34 ` Erez Zilber
2008-02-20 8:41 ` Bart Van Assche
2008-01-30 11:18 ` Vladislav Bolkhovitin
2008-01-30 8:29 ` Bart Van Assche
2008-01-30 16:22 ` James Bottomley
2008-01-30 17:03 ` Bart Van Assche
2008-02-05 7:14 ` [Scst-devel] " Tomasz Chmielewski
2008-02-05 13:38 ` FUJITA Tomonori
2008-02-05 16:07 ` Tomasz Chmielewski
2008-02-05 16:21 ` Ming Zhang
2008-02-05 16:43 ` FUJITA Tomonori
2008-02-05 17:09 ` Matteo Tescione
2008-02-06 1:29 ` FUJITA Tomonori
2008-02-06 2:01 ` Nicholas A. Bellinger
2008-01-30 11:17 ` Vladislav Bolkhovitin
2008-02-04 12:27 ` Vladislav Bolkhovitin
2008-02-04 13:53 ` Bart Van Assche
2008-02-04 17:00 ` David Dillow
2008-02-04 17:08 ` Vladislav Bolkhovitin
2008-02-05 16:25 ` Bart Van Assche
2008-02-05 18:18 ` Linus Torvalds [this message]
2008-02-04 15:30 ` James Bottomley
2008-02-04 16:25 ` Vladislav Bolkhovitin
2008-02-04 17:06 ` James Bottomley
2008-02-04 17:16 ` Vladislav Bolkhovitin
2008-02-04 17:25 ` James Bottomley
2008-02-04 17:56 ` Vladislav Bolkhovitin
2008-02-04 18:22 ` James Bottomley
2008-02-04 18:38 ` Vladislav Bolkhovitin
2008-02-04 18:54 ` James Bottomley
2008-02-05 18:59 ` Vladislav Bolkhovitin
2008-02-05 19:13 ` James Bottomley
2008-02-06 18:07 ` Vladislav Bolkhovitin
2008-02-07 13:13 ` [Scst-devel] " Bart Van Assche
2008-02-07 13:45 ` Vladislav Bolkhovitin
2008-02-07 22:51 ` david
2008-02-08 10:37 ` Vladislav Bolkhovitin
2008-02-09 7:40 ` david
2008-02-08 11:33 ` Nicholas A. Bellinger
2008-02-08 14:36 ` Vladislav Bolkhovitin
2008-02-08 23:53 ` Nicholas A. Bellinger
2008-02-15 15:02 ` Bart Van Assche
2008-02-07 15:38 ` [Scst-devel] " Nicholas A. Bellinger
2008-02-07 20:37 ` Luben Tuikov
2008-02-08 10:32 ` Vladislav Bolkhovitin
2008-02-09 7:32 ` Luben Tuikov
2008-02-11 10:02 ` Vladislav Bolkhovitin
2008-02-08 11:53 ` [Scst-devel] " Nicholas A. Bellinger
2008-02-08 14:42 ` Vladislav Bolkhovitin
2008-02-09 0:00 ` Nicholas A. Bellinger
2008-02-04 18:29 ` Linus Torvalds
2008-02-04 18:49 ` James Bottomley
2008-02-04 19:06 ` Nicholas A. Bellinger
2008-02-04 19:19 ` Nicholas A. Bellinger
2008-02-04 19:44 ` Linus Torvalds
2008-02-04 20:06 ` [Scst-devel] " 4news
2008-02-04 20:24 ` Nicholas A. Bellinger
2008-02-04 21:01 ` J. Bruce Fields
2008-02-04 21:24 ` Linus Torvalds
2008-02-04 22:00 ` Nicholas A. Bellinger
2008-02-04 22:57 ` Jeff Garzik
2008-02-04 23:45 ` Linus Torvalds
2008-02-05 0:08 ` Jeff Garzik
2008-02-05 1:20 ` Linus Torvalds
2008-02-05 8:38 ` Bart Van Assche
2008-02-05 17:50 ` Jeff Garzik
2008-02-06 10:22 ` Bart Van Assche
2008-02-06 14:21 ` Jeff Garzik
2008-02-05 13:05 ` Olivier Galibert
2008-02-05 18:08 ` Jeff Garzik
2008-02-05 19:01 ` Vladislav Bolkhovitin
2008-02-04 22:43 ` Alan Cox
2008-02-04 17:30 ` Douglas Gilbert
2008-02-05 2:07 ` [Scst-devel] " Chris Weiss
2008-02-05 14:19 ` FUJITA Tomonori
2008-02-04 22:59 ` Nicholas A. Bellinger
2008-02-04 23:00 ` James Bottomley
2008-02-04 23:12 ` Nicholas A. Bellinger
2008-02-04 23:16 ` Nicholas A. Bellinger
2008-02-05 18:37 ` James Bottomley
2008-02-04 23:04 ` Jeff Garzik
2008-02-04 23:27 ` Linus Torvalds
2008-02-05 19:01 ` Vladislav Bolkhovitin
2008-02-05 19:12 ` Jeff Garzik
2008-02-05 19:21 ` Vladislav Bolkhovitin
2008-02-06 0:11 ` Nicholas A. Bellinger
2008-02-06 1:43 ` Nicholas A. Bellinger
2008-02-12 16:05 ` [Scst-devel] " Bart Van Assche
2008-02-13 3:44 ` Nicholas A. Bellinger
2008-02-13 6:18 ` CONFIG_SLUB and reproducable general protection faults on 2.6.2x Nicholas A. Bellinger
2008-02-13 16:37 ` Nicholas A. Bellinger
2008-02-06 0:17 ` Integration of SCST in the mainstream Linux kernel Nicholas A. Bellinger
2008-02-06 0:48 ` Nicholas A. Bellinger
2008-02-06 0:51 ` Nicholas A. Bellinger
2008-02-05 0:07 ` Matt Mackall
2008-02-05 0:24 ` Linus Torvalds
2008-02-05 0:42 ` Jeff Garzik
2008-02-05 0:45 ` Matt Mackall
2008-02-05 4:43 ` [Scst-devel] " Matteo Tescione
2008-02-05 5:07 ` James Bottomley
2008-02-05 13:38 ` FUJITA Tomonori
2008-02-05 19:00 ` Vladislav Bolkhovitin
2008-02-05 17:10 ` Erez Zilber
2008-02-05 19:02 ` Bart Van Assche
2008-02-05 19:02 ` Vladislav Bolkhovitin
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=alpine.LFD.1.00.0802051016240.9374@woody.linux-foundation.org \
--to=torvalds@linux-foundation.org \
--cc=James.Bottomley@hansenpartnership.com \
--cc=akpm@linux-foundation.org \
--cc=bart.vanassche@gmail.com \
--cc=fujita.tomonori@lab.ntt.co.jp \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=nab@linux-iscsi.org \
--cc=scst-devel@lists.sourceforge.net \
--cc=vst@vlnb.net \
--cc=vuhuong@mellanox.com \
/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®