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From: Nikos Vassiliadis <nvass@teledomenet.gr>
To: "Artem Kuchin" <matrix@itlegion.ru>
Date: Tue, 25 Sep 2007 12:49:10 +0300
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Cc: freebsd-stable@freebsd.org
Subject: Re: device polling and weird timer interrupt count from vmstat
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On Tuesday 25 September 2007 12:13, Artem Kuchin wrote:
> I have dual CPU with HT. If i turn on HT (and it does help in my case)
> it shoud 2000 int x4 = 8000 ints per second. SO, i have saved 200
> int/second from NIC and got myself 8000 ints/second from timer. 

This kind of load(200intrs/s) earns nothing from polling.

> Did i 
> really win anything? I wish there were some good explanation on this.

It would make a difference for let's say 8000 - 10000 interrupts/sec.
You should read polling(4). It explains a lot:)

HTH

Nikos