From: Andi Kleen <ak@suse.de>
To: "David S. Miller" <davem@redhat.com>
Cc: grundler@parisc-linux.org, alan@lxorguk.ukuu.org.uk,
James.Bottomley@SteelEye.com, axboe@suse.de, suparna@in.ibm.com,
linux-kernel@vger.kernel.org, alex_williamson@hp.com,
bjorn_helgaas@hp.com
Subject: Re: [RFC] block layer support for DMA IOMMU bypass mode II
Date: Wed, 9 Jul 2003 20:55:15 +0200 [thread overview]
Message-ID: <20030709205515.716a2f3a.ak@suse.de> (raw)
In-Reply-To: <20030708.152314.115928676.davem@redhat.com>
On Tue, 08 Jul 2003 15:23:14 -0700 (PDT)
"David S. Miller" <davem@redhat.com> wrote:
> From: Grant Grundler <grundler@parisc-linux.org>
> Date: Tue, 8 Jul 2003 16:25:45 -0600
>
> On Tue, Jul 08, 2003 at 03:04:33PM -0700, David S. Miller wrote:
> > Do you know a common PCI block device that would benefit from this
> > (performs significantly better with short sg lists)? It would be
> > interesting to test.
> >
> > %10 to %15 on sym53c8xx devices found on sparc64 boxes.
>
> Which workload?
>
> dbench type stuff, but that's a hard thing to test these days with
> the block I/O schedulers changing so much. Try to keep that part
> constant in the with/vs/without VIO_VMERGE!=0 testing :)
With MPT-Fusion and reaim "new dbase" load it seems to be slightly faster
with forced IOMMU merging on Opteron, but the differences are quite small (~4%) and could
be measurement errors.
-Andi
next prev parent reply other threads:[~2003-07-09 18:40 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-01 16:46 [RFC] block layer support for DMA IOMMU bypass mode James Bottomley
2003-07-01 17:09 ` Andi Kleen
2003-07-01 17:28 ` James Bottomley
2003-07-01 17:42 ` Andi Kleen
2003-07-01 19:22 ` Grant Grundler
2003-07-01 19:56 ` James Bottomley
2003-07-01 17:54 ` H. Peter Anvin
2003-07-01 19:19 ` Grant Grundler
2003-07-01 19:59 ` Alex Williamson
2003-07-01 20:11 ` James Bottomley
2003-07-01 20:03 ` James Bottomley
2003-07-01 23:01 ` Grant Grundler
2003-07-02 15:52 ` James Bottomley
2003-07-01 22:51 ` David S. Miller
2003-07-01 23:57 ` [RFC] block layer support for DMA IOMMU bypass mode II Andi Kleen
2003-07-02 0:03 ` David S. Miller
2003-07-02 0:22 ` Andi Kleen
2003-07-02 0:21 ` David S. Miller
2003-07-02 16:53 ` Grant Grundler
2003-07-02 17:19 ` Andi Kleen
2003-07-02 16:55 ` Grant Grundler
2003-07-02 17:20 ` Andi Kleen
2003-07-02 17:37 ` Grant Grundler
2003-07-02 21:16 ` Alan Cox
2003-07-02 23:56 ` Andi Kleen
2003-07-03 20:26 ` Alan Cox
2003-07-03 21:24 ` Andi Kleen
2003-07-03 22:19 ` Grant Grundler
2003-07-08 2:14 ` David S. Miller
2003-07-08 19:34 ` Andi Kleen
2003-07-08 19:47 ` Jeff Garzik
2003-07-08 20:10 ` Andi Kleen
2003-07-08 20:11 ` Grant Grundler
2003-07-08 22:04 ` David S. Miller
2003-07-08 22:25 ` Grant Grundler
2003-07-08 22:23 ` David S. Miller
2003-07-09 18:55 ` Andi Kleen [this message]
2003-07-23 11:40 ` Grant Grundler
2003-07-28 11:15 ` Andi Kleen
2003-07-28 14:59 ` Grant Grundler
2003-07-30 2:31 ` Grant Grundler
2003-08-01 21:51 ` Cliff White
2003-08-01 23:18 ` reaim now available as osdl-aim-7 - " Cliff White
2003-07-30 4:42 ` Grant Grundler
2003-07-30 4:51 ` David S. Miller
2003-07-30 13:06 ` Grant Grundler
2003-07-30 16:02 ` Grant Grundler
2003-07-30 16:36 ` Andi Kleen
2003-07-30 17:18 ` James Bottomley
2003-07-30 14:20 ` James Bottomley
2003-07-23 13:20 ` Grant Grundler
2003-07-23 15:30 ` Jens Axboe
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