From owner-freebsd-net@FreeBSD.ORG  Wed Aug 17 12:53:35 2011
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Date: Wed, 17 Aug 2011 08:53:32 -0400
From: Gary Palmer <gpalmer@freebsd.org>
To: Andrew Stevenson <andrew@ugh.net.au>
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Cc: pyunyh@gmail.com, embedded@freebsd.org,
	Ask Bj?rn Hansen <ask@develooper.com>, net@freebsd.org
Subject: Re: system locks up with vr driver on alix board
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On Wed, Aug 17, 2011 at 09:15:34AM +0100, Andrew Stevenson wrote:
> 
> On 17 Aug 2011, at 02:39, Ask Bj?rn Hansen wrote:
> 
> >> How many PPS or interrupts do you see from vr interface under high
> >> network load?
> > 
> > Honestly I'm not sure.  I only know how to see the interrupt busy percentage from top ?    Is there a cheap way to get those numbers?    If so then I'll log them every second or two and see if it catches anything.
> 
> "systat -vmstat" shows interrupts per second per device. Some use of awk or sed may be required.

"vmstat -i" is probably closer to what the OP is looking for

Regards,

Gary