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Date: Tue, 6 Oct 2009 12:21:53 +0800
From: Eugene Grosbein <eugen@kuzbass.ru>
To: rihad <rihad@mail.ru>
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Cc: freebsd-net@freebsd.org, Luigi Rizzo <rizzo@iet.unipi.it>
Subject: Re: dummynet dropping too many packets
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On Mon, Oct 05, 2009 at 07:30:15PM +0500, rihad wrote:

> >>How do I investigate and fix this burstiness issue?
> >
> >Please also show:
> >
> >sysctl net.isr
> >sysctl net.inet.ip.intr_queue_maxlen
> 
> net.isr.swi_count: 65461359
> net.isr.drop: 0
> net.isr.queued: 32843752
> net.isr.deferred: 0
> net.isr.directed: -723075002
> net.isr.count: -723074001
> net.isr.direct: 1
> 
> net.inet.ip.intr_queue_maxlen: 50

Try to increase net.inet.ip.intr_queue_maxlen uptio 4096.

Eugene