From: Jamie Lokier <jamie@shareable.org>
To: Nick Piggin <nickpiggin@yahoo.com.au>,
"Eric D. Mudama" <edmudama@mail.bounceswoosh.org>,
Jeff Garzik <jgarzik@pobox.com>,
linux-ide@vger.kernel.org,
Linux Kernel <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>
Subject: Re: [PATCH] speed up SATA
Date: Mon, 29 Mar 2004 14:03:04 +0100 [thread overview]
Message-ID: <20040329130304.GE4984@mail.shareable.org> (raw)
In-Reply-To: <20040329052405.GG6405@bounceswoosh.org>
Eric D. Mudama wrote:
> On Mon, Mar 29 at 11:30, Nick Piggin wrote:
> >Well strictly, you send them one after the other. So unless you
> >have something similar to our anticipatory scheduler or plugging
> >mechanism, the drive should attack the first one first, shouldn't
> >it?
>
> If you send 32 commands to our disk at once (TCQ/NCQ) we send 'em all
> to our back-end disk engine as fast as possible.
Are they sent _at once_, or are they sent in sequence? If they're
sent in sequence, even if it's a very rapid sequence, than Nick's
point still stands. If you're not attacking the first request which
arrives, the instant the drive code sees it, you're doing something
similar to the anticipatory scheduler.
-- Jamie
next prev parent reply other threads:[~2004-03-29 13:07 UTC|newest]
Thread overview: 115+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-27 22:37 [PATCH] speed up SATA Jeff Garzik
2004-03-27 23:04 ` Stefan Smietanowski
2004-03-27 23:11 ` Jeff Garzik
2004-03-28 7:23 ` Stefan Smietanowski
2004-03-28 15:37 ` Bartlomiej Zolnierkiewicz
2004-03-27 23:32 ` Bartlomiej Zolnierkiewicz
2004-03-27 23:36 ` Jeff Garzik
2004-03-27 23:40 ` Jeff Garzik
2004-03-28 0:13 ` Bartlomiej Zolnierkiewicz
2004-03-28 0:08 ` Jeff Garzik
2004-03-29 11:42 ` Pavel Machek
2004-03-27 23:37 ` Nick Piggin
2004-03-27 23:44 ` Jeff Garzik
2004-03-27 23:47 ` Nick Piggin
2004-03-27 23:59 ` Jeff Garzik
2004-03-28 14:10 ` Jens Axboe
2004-03-28 17:31 ` Jeff Garzik
2004-03-28 17:35 ` Jens Axboe
2004-03-28 17:48 ` Jeff Garzik
2004-03-28 17:54 ` Jens Axboe
2004-03-28 18:08 ` Jamie Lokier
2004-03-28 18:15 ` Jens Axboe
2004-03-28 18:55 ` Jeff Garzik
2004-03-29 8:09 ` Jens Axboe
2004-03-29 12:41 ` Jamie Lokier
2004-03-29 12:44 ` Jens Axboe
2004-03-29 12:50 ` Jamie Lokier
2004-03-29 13:05 ` Arjan van de Ven
2004-03-29 13:08 ` Jens Axboe
2004-03-30 8:13 ` Kurt Garloff
2004-03-30 11:40 ` Jens Axboe
2004-03-29 17:19 ` Craig I. Hagan
2004-03-29 18:19 ` Jeff Garzik
2004-03-28 19:06 ` Jeff Garzik
2004-03-28 18:12 ` William Lee Irwin III
2004-03-28 18:17 ` Jens Axboe
2004-03-28 18:30 ` Bartlomiej Zolnierkiewicz
2004-03-28 18:30 ` Jens Axboe
2004-03-28 18:45 ` Bartlomiej Zolnierkiewicz
2004-03-28 18:59 ` Jeff Garzik
2004-03-28 20:32 ` Andrew Morton
2004-03-28 20:45 ` Jeff Garzik
2004-03-29 0:55 ` Andrea Arcangeli
2004-03-29 4:02 ` Jeff Garzik
2004-03-29 13:04 ` Andrea Arcangeli
2004-03-29 19:45 ` Jeff Garzik
2004-03-30 11:09 ` Jens Axboe
2004-03-30 15:54 ` Timothy Miller
2004-03-30 16:20 ` Jeff Garzik
2004-03-30 18:05 ` Timothy Miller
2004-03-30 17:50 ` Jeff Garzik
2004-03-30 18:19 ` Timothy Miller
2004-03-29 4:29 ` Wim Coekaerts
2004-03-29 7:32 ` Denis Vlasenko
2004-03-29 8:13 ` Jens Axboe
2004-03-29 13:05 ` Andrea Arcangeli
2004-03-29 4:31 ` William Lee Irwin III
2004-03-29 4:57 ` Jeff Garzik
2004-03-28 19:52 ` Nuno Silva
2004-03-28 20:02 ` Jeff Garzik
2004-03-28 0:06 ` Jeff Garzik
2004-03-28 0:15 ` Nick Piggin
2004-03-28 0:49 ` Jeff Garzik
2004-03-28 1:02 ` Andrew Morton
2004-03-28 1:09 ` Jeff Garzik
2004-03-28 13:59 ` Jens Axboe
2004-03-28 17:29 ` Jeff Garzik
2004-03-28 17:31 ` Jens Axboe
2004-03-28 13:51 ` Jamie Lokier
2004-03-28 17:24 ` Jeff Garzik
2004-03-28 17:36 ` Jamie Lokier
2004-03-28 17:54 ` Jeff Garzik
2004-03-28 20:50 ` Eric D. Mudama
2004-04-02 10:11 ` Jeremy Higdon
2004-04-02 16:11 ` Jamie Lokier
2004-04-03 10:48 ` Jeremy Higdon
2004-04-03 13:49 ` Jamie Lokier
2004-03-28 17:40 ` Jens Axboe
2004-03-28 17:49 ` Jeff Garzik
2004-03-28 17:55 ` Jens Axboe
2004-03-28 18:04 ` Jeff Garzik
2004-03-28 18:09 ` Jens Axboe
2004-03-28 20:12 ` Jeff Garzik
2004-03-28 20:54 ` Eric D. Mudama
2004-03-28 7:32 ` Stefan Smietanowski
2004-03-28 20:25 ` Jeff Garzik
2004-03-28 21:16 ` Stefan Smietanowski
2004-03-28 21:26 ` Jeff Garzik
2004-03-28 14:08 ` Jens Axboe
2004-03-28 17:38 ` Jeff Garzik
2004-03-28 17:45 ` Jens Axboe
2004-03-28 20:21 ` Jeff Garzik
2004-03-28 0:07 ` Andrew Morton
2004-03-28 0:21 ` Nick Piggin
2004-03-28 4:40 ` Eric D. Mudama
2004-03-28 6:56 ` Nick Piggin
2004-03-28 20:33 ` Eric D. Mudama
2004-03-28 20:59 ` Eric D. Mudama
2004-03-29 1:30 ` Nick Piggin
2004-03-29 5:24 ` Eric D. Mudama
2004-03-29 13:03 ` Jamie Lokier [this message]
2004-03-29 11:36 ` Pavel Machek
2004-03-29 18:46 ` David Lang
2004-03-29 20:13 ` Jeff Garzik
2004-03-30 5:55 ` Eric D. Mudama
2004-03-30 11:54 ` Marc Bevand
2004-03-30 13:07 ` Jens Axboe
2004-03-30 13:48 ` Marc Bevand
2004-03-30 13:49 ` Jens Axboe
2004-03-30 15:31 ` Jeff Garzik
2004-03-30 17:42 ` Jeff Garzik
2004-03-31 9:12 ` Marc Bevand
-- strict thread matches above, loose matches on Subject: below --
2004-03-31 5:47 Marcus Hartig
2004-03-31 6:56 ` Jeff Garzik
2004-03-31 16:07 ` Marcus Hartig
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