From owner-freebsd-net@FreeBSD.ORG  Fri Jul 21 19:30:38 2006
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Date: Fri, 21 Jul 2006 22:29:54 +0300 (EEST)
From: Dmitry Pryanishnikov <dmitry@atlantis.dp.ua>
To: Jack Vogel <jfvogel@gmail.com>
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Cc: Mikhail Teterin <mi+mx@aldan.algebra.com>, net@freebsd.org,
	Julian Elischer <julian@elischer.org>,
	"David G. Lawrence" <dg@dglawrence.com>
Subject: Re: complement to sendfile()?
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Hello!

On Fri, 21 Jul 2006, Jack Vogel wrote:
>>   Sure there is an interest, spare CPU cycles are never superfluous
>> in production environment! What hardware (NICs/chipsets) supports this
>> I/OAT DMA engine?
> Its part of the Intel Blackford chipset, so for instance Supermicro has a
> motherboard and servers with it.
>
> Oh, and there is nothing changed in the NIC and its driver, this is just
> stack changes together with the chipset dma driver I wrote, so any
> NIC on a system will benefit.

   Aha, so DMA engine is in the main motherboard chipset, not in NIC? Well,
I see, Blackford is the codename for Intel 5000P / 5000V, isn't it? These
chipsets are rather new, so I suspect that testing audience for this new
feature will not be wide enough for now, but the feature itself is definitely 
useful, so future FreeBSD users will greatly appreciate it's support IMHO.

Sincerely, Dmitry
-- 
Atlantis ISP, System Administrator
e-mail:  dmitry@atlantis.dp.ua
nic-hdl: LYNX-RIPE