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From: rick@feenix.metronet.com (Rick Barton)
Newsgroups: comp.os.386bsd.questions
Subject: Re: What is a "silo overflow"?
Date: 6 Feb 1995 05:53:26 GMT
Organization: Texas Metronet, Inc 214/705-2901, login info
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Message-ID: <3h4dgm$86u@feenix.metronet.com>
References: <3fn18a$gej@sundog.tiac.net> <3gpec2$aik@awfulhak.demon.co.uk>
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Brian Somers (brian@awfulhak.demon.co.uk) wrote:
: Rob Landry (umar@tiac.net) wrote:
: : I'm running nn under NetBSD 1.0. Every once in a while I get a message
: : that says "silo overflow". There don't seem to be any measurable consqeuen-
: : ces of these messages.
: : What is a "silo overflow"? Should I be doing anything to prevent or elimi-
: : nate them?
: Have a look at 'man sio'. It means that you've got a slow machine (due to
: load?) and a high serial rate - the kernel isn't fetching info from it fast
: enough. Almost all comms software will do its own error control, asking
: for a re-transmission so you won't notice the difference except in speed
: degredation.
I started with NetBSD, and later tried and stuck with FreeBSD. I also had the silo
errors, and during a slip session at that. It would continue ok for a while, but
later, my slip session would get hung, and there was nothing I could do to free
it up short of reboot :-(
Now with FreeBSD, I don't get any (maybe on some rare occasion) silor errors and
I'm running at 57.6 :-) , also I switched out my _slow_ serial card and added
one with 16550As in it and that made a world of difference. Adding the card
did fix my NetBSD from hanging on the SLIP session and it did much better.
I do believe that FreeBSD serial I/O is better than NetBSD from my experience.
rick
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