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Date:      Mon, 30 Nov 1998 19:51:11 -0600
From:      "Matthew D. Fuller" <fullermd@futuresouth.com>
To:        Mike Smith <mike@smith.net.au>, geoffb@demon.net
Cc:        freebsd-current@FreeBSD.ORG
Subject:   Re: sio breakage
Message-ID:  <19981130195111.J4374@futuresouth.com>
In-Reply-To: <199811302314.PAA06193@dingo.cdrom.com>; from Mike Smith on Mon, Nov 30, 1998 at 03:14:30PM -0800
References:  <199811301627.QAA00766@gti.noc.demon.net> <199811302314.PAA06193@dingo.cdrom.com>

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[ big CC: scissors workout ]

On Mon, Nov 30, 1998 at 03:14:30PM -0800, Mike Smith woke me up to tell me:
> > > >> > Nov 25 23:10:11 zippy /kernel: sio0: 9 more tty-level buffer overflows (total 1260)
...
> > I was assuming the serial interface which is a fixed one breaking out of
> > the back of the Laptop had nothing to do with the PCMCIA, 
> 
> You're quite correct; it doesn't.  There's *something* holding up both 
> your interrupt handlers and the tty soft interrupt; maybe even possibly the 
> same thing that causes the "calcru: negative time for ..." messages.

How far does that extend?
I get sio overflows all the time on my laptop; it just has a hardwired
SLIP connection.  I've got it down to 19200 baud (cables worked just fine
at 57,6, couldn't tell at 115,2) and it still gets overflows every few
minutes when I'm doing anything that passed data across the serial line.
I assumed it was just the processor power (486 SLC/25) being slightly
less than up to the higher data rates.


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|       FreeBSD; the way computers were meant to be       |
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*    fullermd@futuresouth.com      :-}  MAtthew Fuller    *
|      http://keystone.westminster.edu/~fullermd          |
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