linux-kernel - Re: Kernel drops ethernet packets during disk writes

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Date:	Tue, 05 Sep 2006 18:15:12 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Tiemen Schut <tschut@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Kernel drops ethernet packets during disk writes

Ar Maw, 2006-09-05 am 18:06 +0200, ysgrifennodd Tiemen Schut:
> Summary: The linux kernel appears to drop raw ethernet packets if
> another process is writing to disk.

No suprise. 

1Gbit is a bit over 100Mbyte/second

Thats from the card over PCI to memory
Then over PCI from memory to the disk controller

We are up to 200Mbytes/second

Best case performance for a 32bit PCI bus is 133Mbytes/second and you
won't get close to that. Even if both devices are PCI 66Mhz you are
right on the bus limit.

And if its an earlyish PIV what is your main memory bandwidth ?

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