Troubles with em on FreeBSD 7

[Oleksandr Samoylyk]

Oleksandr Samoylyk wrote:
> Jack Vogel wrote:
>> Oh, I just had a thought, increase the RX processing limit,
>> that only allows you to process 100 packets in one pass.
>>
>> First change it to 250 and see what it does, you might
>> also set it to -1 which will allow you to process til you
>> drain the ring, the risk is that you cause other problems
>> by doing that, but heck at this point anything is worth
>> trying, right?
>>
> 
> Nothing has helped. :(
> 
> I need to unplug and plug in again patch cords each time when my CPUs 
> with emX go 100% in order to keep my server alive with a descent pings.
> 
> I mentioned that "100%: emX taskq" occurs only on that interfaces where 
> GRE packets are being processed.
> 
> External interface to Internet feels great. Pings are <0ms and load is
> 9.57%  with 14kpps (input/output).
> 
> Maybe interesting:
> According to kgmon:
>   %   cumulative   self              self     total
>  time   seconds   seconds    calls  ms/call  ms/call  name
>  39.9      93.10    93.10  1643247     0.06     0.07  rip_input [10]
> 
> Is it em related or mpd related or something else?
> 
> Back to releng_6? Not sure though. :(
> 

Now I'm on 6.3-STABLE:

last pid: 31566;  load averages:  7.61,  7.25,  7.07 
                         up 0+01:34:00  22:30:05
82 processes:  10 running, 58 sleeping, 14 waiting
CPU states:  0.2% user,  0.0% nice, 52.1% system, 47.8% interrupt,  0.0% 
idle
Mem: 63M Active, 10M Inact, 152M Wired, 8K Cache, 35M Buf, 1752M Free
Swap: 4011M Total, 4011M Free

   PID USERNAME  THR PRI NICE   SIZE    RES STATE  C   TIME   WCPU COMMAND
    12 root        1 -44 -163     0K     8K WAIT   0  42:43 93.60% swi1: net
    24 root        1  43    0     0K     8K CPU0   0  29:50 48.34% 
em0_rx_kthread_1
    23 root        1  43    0     0K     8K RUN    0  29:50 46.78% 
em0_rx_kthread_0
    28 root        1  43    0     0K     8K RORDER 1   3:30  2.25% 
em1_rx_kthread_0
    29 root        1  43    0     0K     8K RUN    0   3:30  2.15% 
em1_rx_kthread_1
    10 root        1 171   52     0K     8K RUN    1  11:22  0.00% idle: 
cpu1
    11 root        1 171   52     0K     8K RUN    0   9:01  0.00% idle: 
cpu0

The results aren't good as well.

-- 
  Oleksandr Samoylyk
  OVS-RIPE