Latency spikes on FreeBSD 8.2 with kernel scan function.

[Ondrej Zajicek]

On Wed, Nov 23, 2011 at 07:25:18PM +0400, Alexander V. Chernikov wrote:
>> On BSD, kernel scan is implemented by requesting a big buffer and
>> copying several tens of MB of route data from kernel to BIRD.
>> I am not an expert on BSD, but perhaps there may be some kernel problem
>> on some BSD version?
> This looks much more like some shaper configuration problem. There are  
> no global locks in kernel for entire routing table. And no consumer can  
> hold lock that can be acquired by ISR for such a long time.

You think that BSD kernel applies shaping on sysctl() calls?
(which is how the table scan is implemented in krt_sysctl_scan() ).

-- 
Elen sila lumenn' omentielvo

Ondrej 'SanTiago' Zajicek (email: santiago at crfreenet.org)
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
"To err is human -- to blame it on a computer is even more so."
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