netdev - Re: Strange packet drops with heavy firewalling

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Message-ID: <1270819762.2623.97.camel@edumazet-laptop>
Date:	Fri, 09 Apr 2010 15:29:22 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Benny Amorsen <benny+usenet@...rsen.dk>
Cc:	netdev@...r.kernel.org
Subject: Re: Strange packet drops with heavy firewalling

Le vendredi 09 avril 2010 à 14:33 +0200, Benny Amorsen a écrit :

> Thank you very much for the help! I will report back whether it was the
> 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 kernel,
because RPS (Remote Packet Steering) is in.

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



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