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To: "Markie" <mark.cullen@dsl.pipex.com>
From: Ian FREISLICH <if@hetzner.co.za>
In-Reply-To: Message from "Markie" <mark.cullen@dsl.pipex.com> 
   of "Sat, 12 Jun 2004 22:50:25 +0100." <002101c450c7$46a578e0$f700000a@ape> 
Date: Mon, 14 Jun 2004 10:13:40 +0200
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cc: current@FreeBSD.org
Subject: Re: Interrupt storm detection 
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"Markie" wrote:
> | On Fri, 2004-Jun-11 16:01:59 +0200, Ian FREISLICH wrote:
> |
> | >> On Fri, 11 Jun 2004, Ian FREISLICH wrote:
> | >>
> | >> > I have a problem printing.  The data rate through my parallel
> | >> > port to my printer makes the kernel think that lpt0 is storming
> | >> > at between 40k-49k irqs per second.  Is there a way to tell the
> | >> > kernel to
> | >
> | >Does a PII-266 constitute a slightly slower machine?
> |
> | I'm amazed you can get to >40K irqs/sec on a PII-266.
> |
> | Have you tried using lptcontrol(8) polling or extended mode?
> |
> | Your other option is to offload the interrupts - either get a
> | network interface module for your printer or dedicate an old clunker
> | as a print server.
>
> I had this same problem, by the sounds of it, on my "print server" on
> -CURRENT a while back (a little 500MHz machine). I updated it about
> a week after it happened and it went away... haven't updated since
> though.  Maybe this is your problem?

This kernel was built from fresh sources the day before the problem
was encountered.

--
Ian Freislich