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From: chris@mddc.UUCP (Chris Maloney)
Newsgroups: net.unix-wizards
Subject: Re: 4.2BSD DMF32 DMA driver experience, anyone?
Message-ID: <336@mddc.UUCP>
Date: Fri, 29-Jun-84 14:05:53 EDT
Article-I.D.: mddc.336
Posted: Fri Jun 29 14:05:53 1984
Date-Received: Sun, 1-Jul-84 07:03:48 EDT
References: <7554@rochester.UUCP>, <1317@sun.uucp>
Organization: MDDC, Cincinnati, Ohio
Lines: 17

Reply to Bill Shannon:

I recently did a lot of work on your DMF32 driver so
that it would decide on SILO or DMA mode dynamically.
At least on the CS11/F1 from EMULEX (a dmf32 emulator)
this cut the CPU time by about 10%.  My driver basically
works like the DEC driver deciding on DMA when there are
a lot of chars. and using SILO for a small number of chars.

Chris Maloney
Management Decisions Development Corp.
7209 Dixie Highway
Fairfield, Ohio   45014
(513)874-6464

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