Re: [Xen-devel] Interrupt levels

[Kurt Garloff <kurt@xxxxxxxxxx>]

Hi Nicholas,

On Tue, Mar 08, 2005 at 07:52:26PM +1300, Nicholas Lee wrote:
> However on the dom0 instance (which doesn't run any of the above
> services, just the bridge) is seems very high:
> 
> nic@stateless:~$ vmstat 3
> procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
>  r  b   swpd   free   buff  cache   si   so    bi    bo   in    cs us sy id wa
>  0  0     12  10640     40  31168    0    0    17    25   94    19  0  1 99  0
>  0  0     12  10576     40  31168    0    0     0    17 170616    16  0  0 
> 100  0
>  0  0     12  10616     40  31168    0    0     0     0 171948    10  0  0 
> 100  0
>  0  0     12  10680     40  31168    0    0     0     0 171134    10  0  0 
> 100  0
>  0  0     12  10680     40  31168    0    0     0     3 169175    11  0  0 
> 100  0
>  0  0     12  10680     40  31168    0    0     0    15 173097    20  0  0 
> 100  0
> 
> 
> Is this level of interrupts reasonable? 

No. An up-to-date x86 machine can do something like ~200000 interrupts
per sec at 100% CPU load.

Regards,
-- 
Kurt Garloff                   <kurt@xxxxxxxxxx>             [Koeln, DE]
Physics:Plasma modeling <garloff@xxxxxxxxxxxxxxxxxxx> [TU Eindhoven, NL]
Linux: SUSE Labs (Director)    <garloff@xxxxxxx>            [Novell Inc]

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