Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!mcsun!sunic!tut!pl
From: pl@etana.tut.fi (Lehtinen Pertti)
Newsgroups: comp.arch
Subject: Re: *big iron*
Message-ID: <8833@etana.tut.fi>
Date: 27 Sep 89 09:21:04 GMT
References: <1989Sep26.163307.17238@utzoo.uucp>
Sender: News@tut.fi
Lines: 18

From article <1989Sep26.163307.17238@utzoo.uucp>, by henry@utzoo.uucp (Henry Spencer):
> In article <7997@cbmvax.UUCP> jesup@cbmvax.UUCP (Randell Jesup) writes:
>>... most Unix machines are handicapped by the "standard" unix fs/disk
>>cache.  This cache requires them to do single-block reads, while under AmigaDos
>>the filesystem can ask for large blocks and have it transfered by DMA directly
>>from disk to where the application's read goes to...
> 
> It's quite possible to do this under Unix as well, of course, if you've got
> kernel people who seriously care about I/O performance.

	Yes, and if your DMA-controller can manage user buffers spreading
	across several pages all over your memory.

--
pl@tut.fi				! All opinions expressed above are
Pertti Lehtinen				! purely offending and in subject
Tampere University of Technology	! to change without any further
Software Systems Laboratory		! notice