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Date: Thu, 2 Oct 1997 14:24:20 +0930
From: Greg Lehey <grog@lemis.com>
To: "Jonathan E. Lyons" <parrothd@midwest.net>
Cc: freebsd-questions@FreeBSD.ORG
Subject: Re: tty-level buffer overflows
References: <3.0.3.32.19971001225109.006e88f0@midwest.net>
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In-Reply-To: <3.0.3.32.19971001225109.006e88f0@midwest.net>; from Jonathan E. Lyons on Wed, Oct 01, 1997 at 10:51:09PM -0500
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On Wed, Oct 01, 1997 at 10:51:09PM -0500, Jonathan E. Lyons wrote:
> Is this anything to be concerned about? I've got an X2 modem, with the port
> speed set at 57600.....
>
>
> Sep 28 16:42:11 cplkagan /kernel: sio0: 660 more tty-level buffer overflows
> (total 660)
> Sep 29 13:52:41 cplkagan /kernel: pid 18534 (ping), uid 0: exited on signal 3
> Sep 30 21:05:02 cplkagan /kernel: sio0: 100 more tty-level buffer overflows
> (total 760)
> Sep 30 22:00:02 cplkagan /kernel: sio0: 198 more tty-level buffer overflows
> (total 958)
> Sep 30 22:05:01 cplkagan /kernel: sio0: 199 more tty-level buffer overflows
> (total 1157)
> Sep 30 22:05:02 cplkagan /kernel: sio0: 1076 more tty-level buffer
> overflows (total 2233)
> Oct  1 05:30:02 cplkagan /kernel: sio0: 940 more tty-level buffer overflows
> (total 3173)

Yes.  With PPP, each of these means a lost packet, which is expensive.
This shouldn't happen.  Is the machine slow or heavily loaded?
Otherwise you might be losing interrupts.

Greg