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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: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
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 23:53 ` 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
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