rlm_ippool slowness

[Chris Hellberg]

Alan,




----- Original Message ----
> From: Alan DeKok <aland at deployingradius.com>
> To: FreeRadius developers mailing list <freeradius-devel at lists.freeradius.org>
> Sent: Thu, 3 March, 2011 16:57:08
> Subject: Re: rlm_ippool slowness
> 
> Chris Hellberg wrote:
> > I modified rlm_ippool.c to create a hash key  against Calling-Station-Id, 
>which 
>
> > is unique across my  NAS.
> 
>   Why?
> 
>     key = %{md5:  %{Calling-Station-Id}}
> 

I've done this because the default behavior in freeradius of using Nas-Port and 
Nas-IP-Address will not generate a unique hash or rather will generate too 
duplicate hashes.

> > However, I find radiusd goes up to 97% CPU  when I use this IP allocation 
>method. 
>
> > If I don't use any server-side IP  allocation, I get CPU use hovering around 
>4%. 
>
> > I can't use an integer  like Nas-Id to hash against because it's not a unique 
>
> > value on my NAS,  hence I had to modify rlm_ipool.c. So I can't easily check 

> > whether the  problem is in the rest of rlm_ippool.c or in the change of the 
> > hashing  method that I've done.
> 
>   If the problem isn't in the default code,  then it's difficult for us
> to help.
> 

I've changed one line - the line that creates the hash key. What would you need 
me to provide/do to help find the source of the delay?

/Chris