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Date:      Wed, 07 Oct 1998 19:43:48 +0200
From:      sthaug@nethelp.no
To:        adrian@ubergeeks.com
Cc:        freebsd-smp@FreeBSD.ORG
Subject:   RE: hw platform Q - what's a good smp choice these days? 
Message-ID:  <23958.907782228@verdi.nethelp.no>
In-Reply-To: Your message of "Wed, 7 Oct 1998 09:51:19 -0400 (EDT)"
References:  <Pine.BSF.3.96.981007094419.4604A-100000@lorax.ubergeeks.com>

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> 	Well, IDE tends to use significantly more CPU for IO than SCSI. 
> Isn't that what does all the DMA work for IDE?

Not if you have a reasonably modern PCI chipset and set the correct
flags in your kernel config file.

>From my own (limited) measurements, there is no significant difference
in CPU usage between IDE and SCSI with the wd driver in 3.0.

Steinar Haug, Nethelp consulting, sthaug@nethelp.no

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