From: Jeff Garzik <jgarzik@pobox.com>
To: Marc Bevand <bevand_m@epita.fr>
Cc: Andrew Morton <akpm@osdl.org>,
Linux Kernel <linux-kernel@vger.kernel.org>,
Greg KH <greg@kroah.com>
Subject: Re: [PATCH] speed up SATA
Date: Tue, 30 Mar 2004 12:42:07 -0500 [thread overview]
Message-ID: <4069B16F.7020306@pobox.com> (raw)
In-Reply-To: <40695FF6.3020401@epita.fr>
Marc Bevand wrote:
> I think I am reaching the physical limit of the PCI bus (theoretically it
> would be 133 MB/s or 133000 blocks/s). When setting the PCI latency
> timer of
> the SiI3114 controller to 240 (was 64), I am able to reach 100000 blocks/s.
That's interesting.
I wonder if we should look at making pci_set_master()'s latency timer
setting code be a bit smarter.
It (pcibios_set_master in arch/i386/pci/i386.c) current checks the
latency timer value programmed by the BIOS. If the BIOS did not
initialize the value, then it is set to 64. Otherwise, it is clamped to
the maximum 255.
I wonder if your BIOS shouldn't increase that latency timer value...?
Jeff
next prev parent reply other threads:[~2004-03-30 17:43 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
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 [this message]
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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