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Date: Mon,  9 May 2005 11:55:53 -0400
From: Kenneth Culver <culverk@sweetdreamsracing.biz>
To: Greg 'groggy' Lehey <grog@FreeBSD.org>
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cc: "M. Parsons" <mrparsons@gmail.com>
cc: freebsd-questions@freebsd.org
Subject: Re: Is this a high interrupt rate for nics?
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Quoting Greg 'groggy' Lehey <grog@FreeBSD.org>:

> On Sunday,  8 May 2005 at  9:02:08 -0400, M. Parsons wrote:
>> Freebsd-5.3 SMP Kernel. Polling enabled.
>>
>> bash-2.05b$ vmstat -i
>> interrupt                          total       rate
>> irq5: ep0                        2937064          1
>> irq11: ed0                     298318862        165
>> irq10: de0                     276544892        152
>>
>> Are those normal for ed0 and de0?  Compared to the ep0 nic of rate
>> of 1 (although the ep0 nic is not used as much as the other two nics
>> obviously).
>
> Depends on what you mean by "normal".  You'll get one interrupt per
> packet, and those rates are perfectly normal.  If you're not
> transferring anything, you shouldn't be getting any interrupts.
>

These are actually a bit low in my experience for full-speed 100 Mbit/sec
traffic... I'll go up to the 2000-3000 range at full 100 Mbit speeds.

Ken