Date: Mon, 26 Aug 1996 09:15:14 -0500 From: Hal Snyder <hal@post.vale.com> To: "'Michael L. VanLoon'" <michaelv@MindBender.serv.net> Cc: "'freebsd-hackers@freebsd.org'" <freebsd-hackers@freebsd.org> Subject: Multiple swaps slow down system? Message-ID: <01BB932F.47934380@jaguar>
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Michael L. VanLoon wrote:
> I don't know why that happens, but I wouldn't expect it to give you
> much of a performance boost, since IDE doesn't do asynchronous I/O (at
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> least under *BSD anyway). If you have a very busy system, I would
> expect it to give you a performance drop, in fact.
I'm not sure what you mean here by "asynchronous". Can you explain?
The last time I looked at hd device drivers, SCSI had it all over IDE just
because of DMA support - the old ST506 interface still used by IDE forced the
CPU to handle all I/O going to/from the hard drive. Has this changed?
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