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Date: Tue, 01 Feb 2011 14:23:23 +0600
From: Eugene Grosbein <egrosbein@rdtc.ru>
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Cc: freebsd-stable@freebsd.org
Subject: Re: em0: Watchdog timeout -- resetting
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On 01.02.2011 13:58, Lev Serebryakov wrote:
> Hello, Freebsd-stable.
> You wrote 1 февраля 2011 г., 10:24:16:
> 
>>   And all connections are reset. Before latest commits to driver
>> this system paniced in swi_clock. Now it works without panics, but
>> seems, that problem is not fixed completely.
>   I forgot to give one last pice of information: POLLING is in action.
> Without it single thread copy from this server via SMB eats one core
> of CPU completely.
> 

You could give a try to netisr parallelism of RELENG_8 instead of POLLING
(and tune interrupt throttling) if your box does not have lots of dynamic
interfaces like when using mpd.

In /etc/sysctl.conf:

net.isr.direct=0
net.isr.direct_force=0

Eugene Grosbein.