From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: Strange packet drops with heavy firewalling
Date: Fri, 09 Apr 2010 15:29:22 +0200
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To: Benny Amorsen <benny+usenet@amorsen.dk>
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Le vendredi 09 avril 2010 =C3=A0 14:33 +0200, Benny Amorsen a =C3=A9cri=
t :

> Thank you very much for the help! I will report back whether it was t=
he
> hash buckets.

OK

You could try :

ethtool -C eth0 tx-usecs 200 tx-frames 100 tx-frames-irq 100
ethtool -C eth1 tx-usecs 200 tx-frames 100 tx-frames-irq 100

(to reduce tx completion irqs)


Before buying multiqueue devices, you also could try net-next-2.6 kerne=
l,
because RPS (Remote Packet Steering) is in.

In your setup, this might help a bit, distribute the packets to all cpu=
s,
with appropriate cache handling.