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 <egrosb...@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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