[1940] in linux-net channel archive
Re: missed interupt
daemon@ATHENA.MIT.EDU (Roman Dolejsi)
Sat Feb 17 12:57:06 1996
Date: Sat, 17 Feb 1996 02:36:01 +0100 (GMT+0100)
From: Roman Dolejsi <roman@sorry.vse.cz>
To: rich payne <rdp@top.monad.net>
Cc: linux-net@vger.rutgers.edu
In-Reply-To: <199602160335.WAA10675@top.monad.net>
On Thu, 15 Feb 1996, rich payne wrote:
>
> I recently upgraded our kernel from 1.2.13 to 1.3.62, needed some
> new features like quota etc..
> Now I get a message to the console,
>
> eth0:missed interupt status then 2011 status now 2011 Tx 00
> Rx 3dea
>
> when the network load increases. Never received any messages like
> this under 1.2.13.
>
> Machine is 486DX2-66 with 3com 3c509 network card.
This occurs when you have some card with small I/O buffers (the one like
3c509). Whenever i/o buffer is full, interrupt is generated and linux has
to serve it. When you have very loaded network (often TCP/IP together
with IPX and AppleTalk), you probably should have some net-card with
larger buffers (WD80x3 or SMC Elite Ultra will both do it ok, also newer
ne2000/jumperless). Interrupts will not be generated so often and you
then probably won't get this message anymore. Enough buffer size is about 32k.
Roman Dolejsi
administrator at PUE/Prague,CZE
