Bad routing performance on 500Mhz Geode LX with CURRENT, ipfw and mpd5

[Adrian Chadd]

Just as a data point - disable preemption and try again?

And run 4BSD + no preemption, try again?


Adrian

On 30 August 2012 22:50, Eugene Grosbein <egrosbein at rdtc.ru> wrote:
> 31.08.2012 12:19, Eugene Grosbein пишет:
>
>> With HEAD driver, for same test LA pikes to 8 and higher and it takes up to 10 seconds
>> for userland applications like shell or screen(1) to respond to physical console events:
>>
>> last pid:  1335;  load averages:  8.27,  4.05,  2.04        up 0+00:14:21  23:31:18
>> 97 processes:  2 running, 83 sleeping, 12 waiting
>> CPU:  0.1% user,  0.0% nice, 55.7% system, 43.6% interrupt,  0.6% idle
>> Mem: 40M Active, 21M Inact, 175M Wired, 2512K Cache, 109M Buf, 749M Free
>> Swap:
>>
>>   PID USERNAME     PRI NICE   SIZE    RES STATE    TIME   WCPU COMMAND
>>    12 root         -16    -     0K     8K sleep    1:12 44.87% ng_queue
>>    11 root         -28    -     0K    96K WAIT     1:45 35.60% intr{swi5: +}
>>    11 root         -44    -     0K    96K WAIT     1:03 18.80% intr{swi1: netisr 0}
>>    10 root         171 ki31     0K     8K RUN      6:34  0.39% idle
>>    13 root         -16    -     0K     8K -        0:07  0.10% yarrow
>
> Not very representative screenshot; in fact, interrupt rate is at 90-100% level
> most of time for both of old and new vr(4) drivers during test and
> that's the reason of spiking Load Average.
>
> Eugene Grosbein
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