TRUE realtime priority

[Unga]

--- On Tue, 10/7/08, Wojciech Puchar <wojtek at wojtek.tensor.gdynia.pl> wrote:

Hello Wojciech

> is it possible on FreeBSD
> 
Its soft RT. Try to use the latest ULE scheduler. 

> i run asterisk with realtime priority. it works perfectly
> no matter how 
> much CPU is loaded by other non-telephony tasks.
> 
> but with lots of VM pressure it starts to so... like like
> tha..that...
> 
> what causes it to behave like that and how to fix it.
> 
VM (interrupt priority) runs higher priority than RT in FreeBSD. The interrupt priority preempts RT.

To fix it, don't have any VM activity. Increase your RAM.

> for example when lots of spam comes to server and lots of
> resource hungry 
> spamassassin processes are spawned our calls starts to be
> crappy.
> 
> CPU load for asterisk rarely exceed few percent!
> 
> i think having separate computer just for this is stupid, i
> would do this 
> having no other choice, but can it be done without this.
> 
When a postman deliver mail, do you check whether are they to you before accept or just blindly accept all and check later? :)

Best regards
Unga