Problems with netgraph

[Oleksandr Samoylyk]

Julian Elischer wrote:
> Oleksandr Samoylyk wrote:
>> David DeSimone wrote:
>>> Julian Elischer <julian at elischer.org> wrote:
>>>> unfortunatly I've been totally  ignoring this thread because it said
>>>> "trouble with em" in the topic..
>>>> If you'd said "trouble with mpd" then maybe I'd have looked earlier..
>>>
>>> In the poster's defense, the only symptom that started this was this
>>> info from ps:
>>>
>>>   PID USERNAME  THR PRI NICE   SIZE    RES STATE  C   TIME   WCPU 
>>> COMMAND
>>>    29 root        1 -68    -     0K    16K CPU5   5 196:41 100.00% 
>>> em0 taskq
>>>
>>> So tracking it down to mpd has been a process of elimination in figuring
>>> out why packets absorb so much CPU.
>>>
>>
>> Here is a result of profiling:
>>
>> http://lists.freebsd.org/pipermail/freebsd-net/2008-May/017901.html
>>
> 
> 
>                  0.00        0.00      16/1643247     igmp_input [833]
>                  0.03        0.01     614/1643247     icmp_input [272]
>                 93.07       17.27 1642617/1643247     encap4_input [9]
> [10]    49.8   93.10       17.27 1643247         rip_input [10]
>                 14.26        0.88  600796/749987      _mtx_lock_sleep [21]
>                  0.16        1.70 1643863/1643863     raw_append [93]
>                  0.00        0.24   36345/176995      _mtx_unlock_sleep
> [114]
>                  0.01        0.00 1643863/5117962     jailed [278]
>                  0.00        0.00    1292/1843        m_copym [666]
>                  0.00        0.00     676/8214484     m_freem [34]
> 
> 
> 
> 50% of time in rip_input???
> 
> that's unexpected.. what is the traffic?


more than 20k pps

# netstat -I em0 -w 1
             input          (em0)           output
    packets  errs      bytes    packets  errs      bytes colls
      22247     0   10767499      21079     0   13741924     0
      21356     0   10535580      20288     0   13014669     0
      21871     0   10565622      20586     0   13165147     0
      21894     0   10495771      20964     0   13806336     0
      21303     0   10496544      19682     0   12659588     0
      21643     0   10561207      20140     0   12692946     0
      21534     0   10304466      20289     0   13460444     0
^C

> also:
> 
> I see no netgraph  in the profile at all.
> did you statically compile it all in at compile time? (you should if you 
> want to see it)
> 

Tried both variants. Now not statically.

-- 
  Oleksandr Samoylyk
  OVS-RIPE