Subject: Re: Interrupt frequency
To: John Hayward <John.C.Hayward@wheaton.edu>
From: Matthew Jacob <mjacob@feral.com>
List: port-alpha
Date: 03/01/2001 19:24:21
On Thu, 1 Mar 2001, John Hayward wrote:
> Dear Alpha People,
> On my Multia I'm seeing over 1,000 interrupts reported via vmstat:
> ====
> % vmstat -c 10
> procs memory page disks faults cpu
> r b w avm fre flt re pi po fr sr f0 s0 m0 in sy cs us sy id
> 0 0 0 58592 2856 7 0 0 0 1 1 0 3 0 1033 22 6 5 1 94
> 0 0 0 58592 2856 2 0 0 0 0 0 0 0 0 1033 18 6 0 1 99
> 0 0 0 58592 2856 2 0 0 0 0 0 0 0 0 1030 18 6 0 0 100
> 0 0 0 58592 2856 2 0 0 0 0 0 0 0 0 1030 18 6 0 0 100
> 0 0 0 58592 2856 2 0 0 0 0 0 0 0 0 1030 18 6 0 0 100
> 0 0 0 58592 2856 2 0 0 0 0 0 0 0 0 1030 22 7 0 1 99
> 0 0 0 58592 2856 2 0 0 0 0 0 0 0 0 1030 18 6 0 0 100
> 0 0 0 58592 2856 2 0 0 0 0 0 0 0 0 1030 18 6 0 0 100
> 0 0 0 58592 2856 2 0 0 0 0 0 0 0 0 1030 18 7 0 0 100
> 0 0 0 58592 2856 2 0 0 0 0 0 0 0 0 1030 18 6 0 0 100
> ===
> On an i386 machine I see between 100 and 138.
>
> Is this normal to see an order of magnitude difference?
1024 HZ clock.