From: Jakob Oestergaard <jakob@unthought.net>
To: Dan Williams <dan.j.williams@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>,
NeilBrown <neilb@suse.de>,
linux-raid@vger.kernel.org, akpm@osdl.org,
linux-kernel@vger.kernel.org, christopher.leech@intel.com
Subject: Re: [PATCH 00/19] Hardware Accelerated MD RAID5: Introduction
Date: Thu, 14 Sep 2006 09:42:48 +0200 [thread overview]
Message-ID: <20060914074248.GD23492@unthought.net> (raw)
In-Reply-To: <e9c3a7c20609131217q145fb234q36f70b23f1acf950@mail.gmail.com>
On Wed, Sep 13, 2006 at 12:17:55PM -0700, Dan Williams wrote:
...
> >Out of curiosity; how does accelerated compare to non-accelerated?
>
> One quick example:
> 4-disk SATA array rebuild on iop321 without acceleration - 'top'
> reports md0_resync and md0_raid5 dueling for the CPU each at ~50%
> utilization.
>
> With acceleration - 'top' reports md0_resync cpu utilization at ~90%
> with the rest split between md0_raid5 and md0_raid5_ops.
>
> The sync speed reported by /proc/mdstat is ~40% higher in the accelerated
> case.
Ok, nice :)
>
> That being said, array resync is a special case, so your mileage may
> vary with other applications.
Every-day usage I/O performance data would be nice indeed :)
> I will put together some data from bonnie++, iozone, maybe contest,
> and post it on SourceForge.
Great!
--
/ jakob
next prev parent reply other threads:[~2006-09-14 7:42 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-11 23:00 [PATCH 00/19] Hardware Accelerated MD RAID5: Introduction Dan Williams
2006-09-11 23:00 ` Dan Williams
2006-09-11 23:17 ` [PATCH 01/19] raid5: raid5_do_soft_block_ops Dan Williams
2006-09-11 23:34 ` Jeff Garzik
2006-09-11 23:17 ` [PATCH 02/19] raid5: move write operations to a workqueue Dan Williams
2006-09-11 23:36 ` Jeff Garzik
2006-09-11 23:17 ` [PATCH 03/19] raid5: move check parity " Dan Williams
2006-09-11 23:17 ` [PATCH 04/19] raid5: move compute block " Dan Williams
2006-09-11 23:18 ` [PATCH 05/19] raid5: move read completion copies " Dan Williams
2006-09-11 23:18 ` [PATCH 06/19] raid5: move the reconstruct write expansion operation " Dan Williams
2006-09-11 23:18 ` [PATCH 07/19] raid5: remove compute_block and compute_parity5 Dan Williams
2006-09-11 23:18 ` [PATCH 08/19] dmaengine: enable multiple clients and operations Dan Williams
2006-09-11 23:44 ` Jeff Garzik
2006-09-12 0:14 ` Dan Williams
2006-09-12 0:52 ` Roland Dreier
2006-09-12 6:18 ` Dan Williams
2006-09-12 9:15 ` Evgeniy Polyakov
2006-09-13 4:04 ` Jeff Garzik
2006-09-15 16:38 ` Olof Johansson
2006-09-15 19:44 ` [PATCH] dmaengine: clean up and abstract function types (was Re: [PATCH 08/19] dmaengine: enable multiple clients and operations) Olof Johansson
2006-09-15 20:02 ` [PATCH] [v2] " Olof Johansson
2006-09-18 22:56 ` [PATCH] " Dan Williams
2006-09-19 1:05 ` Olof Johansson
2006-09-19 11:20 ` Alan Cox
2006-09-19 16:32 ` Olof Johansson
2006-09-11 23:18 ` [PATCH 09/19] dmaengine: reduce backend address permutations Dan Williams
2006-09-15 14:46 ` Olof Johansson
2006-09-11 23:18 ` [PATCH 10/19] dmaengine: expose per channel dma mapping characteristics to clients Dan Williams
2006-09-11 23:18 ` [PATCH 11/19] dmaengine: add memset as an asynchronous dma operation Dan Williams
2006-09-11 23:50 ` Jeff Garzik
2006-09-11 23:18 ` [PATCH 12/19] dmaengine: dma_async_memcpy_err for DMA engines that do not support memcpy Dan Williams
2006-09-11 23:51 ` Jeff Garzik
2006-09-11 23:18 ` [PATCH 13/19] dmaengine: add support for dma xor zero sum operations Dan Williams
2006-09-11 23:18 ` [PATCH 14/19] dmaengine: add dma_sync_wait Dan Williams
2006-09-11 23:52 ` Jeff Garzik
2006-09-11 23:18 ` [PATCH 15/19] dmaengine: raid5 dma client Dan Williams
2006-09-11 23:54 ` Jeff Garzik
2006-09-11 23:19 ` [PATCH 16/19] dmaengine: Driver for the Intel IOP 32x, 33x, and 13xx RAID engines Dan Williams
2006-09-15 14:57 ` Olof Johansson
2006-09-11 23:19 ` [PATCH 17/19] iop3xx: define IOP3XX_REG_ADDR[32|16|8] and clean up DMA/AAU defs Dan Williams
2006-09-11 23:55 ` Jeff Garzik
2006-09-11 23:19 ` [PATCH 18/19] iop3xx: Give Linux control over PCI (ATU) initialization Dan Williams
2006-09-11 23:56 ` Jeff Garzik
2006-09-11 23:19 ` [PATCH 19/19] iop3xx: IOP 32x and 33x support for the iop-adma driver Dan Williams
2006-09-11 23:38 ` [PATCH 00/19] Hardware Accelerated MD RAID5: Introduction Jeff Garzik
2006-09-11 23:38 ` Jeff Garzik
2006-09-11 23:53 ` Dan Williams
2006-09-12 2:41 ` Jeff Garzik
2006-09-12 5:47 ` Dan Williams
2006-09-13 4:05 ` Jeff Garzik
2006-09-13 7:15 ` Jakob Oestergaard
2006-09-13 19:17 ` Dan Williams
2006-09-14 7:42 ` Jakob Oestergaard [this message]
2006-10-11 1:46 ` Dan Williams
2006-10-08 22:18 ` Neil Brown
2006-10-10 18:23 ` Dan Williams
2006-10-11 2:44 ` Neil Brown
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=20060914074248.GD23492@unthought.net \
--to=jakob@unthought.net \
--cc=akpm@osdl.org \
--cc=christopher.leech@intel.com \
--cc=dan.j.williams@gmail.com \
--cc=dan.j.williams@intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-raid@vger.kernel.org \
--cc=neilb@suse.de \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.