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Date:      Sat, 1 Feb 2003 19:43:52 -0600
From:      David Syphers <dsyphers@uchicago.edu>
To:        Scott Long <scott_long@btc.adaptec.com>
Cc:        current@freebsd.org, kde@freebsd.org
Subject:   Re: trouble with ogle performance after going to 5.0-R
Message-ID:  <200302011943.41649.dsyphers@uchicago.edu>
In-Reply-To: <3E3C5B8E.30000@btc.adaptec.com>
References:  <200302011715.21531.dsyphers@uchicago.edu> <3E3C5B8E.30000@btc.adaptec.com>

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On Saturday 01 February 2003 05:43 pm, Scott Long wrote:
> Have you made
> sure that the DVD drive is using DMA?  'sysctl hw.ata.atapi_dma' will
> tell you, and can be set at boot from /boot/loader.conf.

This was the main problem. Turning on DMA makes everything run smoothly and 
drops the load averages significantly. I must have made this change to my 4.x 
system once about a year ago, and completely forgotten about it since. I 
should write an addition to the handbook about this... Thanks!

-David

-- 
"Whatever it is that the government does, sensible Americans
would prefer that the government does it to somebody else. 
This is the idea behind foreign policy."
-P. J. O'Rourke

Astronomy and Astrophysics Center
The University of Chicago

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