Date: Thu, 30 Aug 2012 23:54:49 -0700 From: Adrian Chadd <adrian@freebsd.org> To: Eugene Grosbein <egrosbein@rdtc.ru> Cc: pyunyh@gmail.com, freebsd-net@freebsd.org, Lev Serebryakov <lev@freebsd.org>, Ian Smith <smithi@nimnet.asn.au> Subject: Re: Bad routing performance on 500Mhz Geode LX with CURRENT, ipfw and mpd5 Message-ID: <CAJ-VmomzY1TFjwPdZWGStb9wBZ1RZrk3QZnJMGkxvftWGKPCHQ@mail.gmail.com> In-Reply-To: <5040508D.9080107@rdtc.ru> References: <1865271844.20120829131610@serebryakov.spb.ru> <CAHu1Y70MynCMQTrJUMwTZ0%2BLrM1JiZFt_B77028XHfoiRgzmaA@mail.gmail.com> <1807373989.20120829223125@serebryakov.spb.ru> <20120830152726.A33776@sola.nimnet.asn.au> <534292400.20120830131158@serebryakov.spb.ru> <20120831180721.GB3208@michelle.cdnetworks.com> <50404957.302@rdtc.ru> <5040508D.9080107@rdtc.ru>
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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@rdtc.ru> wrote:
> 31.08.2012 12:19, Eugene Grosbein =D0=C9=DB=C5=D4:
>
>> 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+00:14:2=
1 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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