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From: "Ravinandan Arakali" <ravinandan.arakali@neterion.com>
To: "'Chris Leech'" <christopher.leech@intel.com>,
	<linux-kernel@vger.kernel.org>, <netdev@vger.kernel.org>
Subject: I/OAT configuration ?
Date: Thu, 17 Aug 2006 17:05:27 -0700	[thread overview]
Message-ID: <003701c6c25a$034b0090$4010100a@pc.s2io.com> (raw)
In-Reply-To: <20060816005343.8634.21805.stgit@gitlost.site>

Hi,
I am trying to use I/OAT on one of the newer woodcrest boxes.
But not sure if things are configured properly since there
seems to be no change in performance with I/OAT enabled
or disabled.
Following are the steps followed.
1. MSI (CONFIG_PCI_MSI) is enabled in kernel(2.6.16.21).
2. In kernel DMA configuration, following are enabled.
     Support for DMA Engines
     Network: TCP receive copy offload
     Test DMA Client
     Intel I/OAT DMA support
3. I manually load the ioatdma driver (modprobe ioatdma)

As per some documentation I read, when step #3 is performed
successfully, directories dma0chanX is supposed to be created
under /sys/class/dma but in my case, this directory stays
empty. I don't see any messages in /var/log/messages.
Any idea what is missing ?

Thanks,
Ravi



  reply	other threads:[~2006-08-18  0:06 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-08-16  0:53 [PATCH 1/7] [I/OAT] Push pending transactions to hardware more frequently Chris Leech
2006-08-16  0:53 ` [PATCH 2/7] [I/OAT] Only offload copies for TCP when there will be a context switch Chris Leech
2006-08-16  0:53 ` [PATCH 3/7] [I/OAT] Don't offload copies for loopback traffic Chris Leech
2006-08-18 18:17   ` Andi Kleen
2006-08-18 21:23     ` David Miller
2006-08-16  0:53 ` [PATCH 4/7] [I/OAT] Remove the wrappers around read(bwl)/write(bwl) in ioatdma Chris Leech
2006-08-18  0:05   ` Ravinandan Arakali [this message]
2006-08-16  0:53 ` [PATCH 5/7] [I/OAT] Remove the use of writeq from the ioatdma driver Chris Leech
2006-08-16  0:53 ` [PATCH 6/7] [I/OAT] Add documentation for the tcp_dma_copybreak sysctl Chris Leech
2006-08-16  0:53 ` [PATCH 7/7] [I/OAT] Add entries to MAINTAINERS for the DMA memcpy subsystem and ioatdma Chris Leech
2006-08-16  4:52   ` Randy.Dunlap
2006-08-16 16:57     ` [PATCH 7/7 v2] " Chris Leech
2006-08-18  7:11 ` [PATCH 1/7] [I/OAT] Push pending transactions to hardware more frequently Pavel Machek
2006-08-18 15:11   ` Chris Leech
  -- strict thread matches above, loose matches on Subject: below --
2006-08-18 16:55 I/OAT configuration ? Leech, Christopher

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