Date: Thu, 06 Nov 1997 00:08:53 +0000 From: Brian Somers <brian@awfulhak.org> To: Evan Champion <evanc@synapse.net> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: sio buffer overflows Message-ID: <199711060008.AAA03991@awfulhak.demon.co.uk> In-Reply-To: Your message of "Wed, 05 Nov 1997 10:35:38 EST." <Pine.BSF.3.96.971105103154.13193A-100000@cello.synapse.net>
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> I'm on an unladen (just running X) Pentium Pro 200 with a 16650. I am
What's a 16650 (is this the thing w/ the 256 byte FIFO) ?
> doing iijppp over multilink PPP on this port. The port speed is set to
ppp doesn't support multilink PPP yet.
> 57600 (230.4K effective). The port is detected as a 16650. I am running
> a very recent -current.
If the port speed is set to 57600, then that's the maximum data rate
(although you may get more if you're using PREDICTOR1 and/or VJ
compression).
If your modem is running at 14400, you shouldn't see the overflows
unless there's a problem with your UART.
If your modem is running at 28.8 or 33.6, you ought to up your DTR to
115200. If you still get the overflows, I'd start looking at the
UART......
> One would think that such a system would have no problems keeping up with
> the load, but I'm seeing these sort of things in my logs:
>
> sio3: 2 more silo overflows (total 2)
> sio3: 1 more silo overflow (total 3)
> sio3: 321 more tty-level buffer overflows (total 321)
>
> While installing -current over PPP I was getting hundreds of overflows.
>
> There aren't any IRQ conflicts so I'm at a loss to explain these. Is
> there something I cna do to reduce the overflows?
>
> Thanks.
>
> Evan
>
--
Brian <brian@Awfulhak.org>, <brian@FreeBSD.org>, <bri@OpenBSD.org>
<http://www.Awfulhak.org>;
Don't _EVER_ lose your sense of humour....
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