Subject: Re: BigMac Ethernet out of rx descriptors
To: David Laight , Kevin Halverson <firstname.lastname@example.org>
From: Volker Borchert <email@example.com>
Date: 02/25/2003 19:12:49
In message <20030225172807.M27095@snowdrop.l8s.co.uk> you write:
|> From some (rather old) experience of 10M sbus cards I would agree that
|> the 60MHz cpu will not keep up with a saturated 100M ethernet.
|> However there isn't actually a requirement for that, all you need are
|> enough rx buffers to handle a window full of traffic on all your
|> active connections.
If I recall the original post correctly, the machine is doing tcpdump
on a highly loaded network, therefore the interface is in promiscuous
mode and the CPU gets to handle all of the traffic without any chance
to throttle a peer.