device polling and weird timer interrupt count from vmstat

[Nikos Vassiliadis]

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