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Date: Mon, 07 Feb 2011 08:02:59 -0500
From: Mike Tancsa <mike@sentex.net>
Organization: Sentex Communications
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To: Lev Serebryakov <lev@freebsd.org>
References: <787079038.20110207004023@serebryakov.spb.ru>
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Cc: freebsd-net@freebsd.org, freebsd-stable@freebsd.org, "Vogel,
	Jack" <jack.vogel@intel.com>
Subject: Re: em0 hangs without any messages like "Watchdog timeout", only
 down/up reset it.
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> 
> /boot/loader.conf:
> hw.em.rxd=4096
> hw.em.txd=4096
> net.link.ifqmaxlen=16384
> 
> /etc/sysctl.conf:
> dev.em.0.rx_int_delay=200
> dev.em.0.tx_int_delay=200
> dev.em.0.rx_abs_int_delay=4000
> dev.em.0.tx_abs_int_delay=4000
> dev.em.0.rx_processing_limit=4096
> 
> 
>    I'm trying to run with patch from "em driver, 82574L chip, and
>  possibly ASPM" thread now under heavy network load.
> 

Hi Lev,
	What if you try with just the defaults ?  Not sure the patch posted by
jack and sean will help as its meant for a specific type of em nic, but
the RELENG_8 version I am testing with is here

 http://www.tancsa.com/if_em-8.c.

There is a patch to jack's patch by Sean as well thats incorporated in
that version

	---Mike


-- 
-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike@sentex.net
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada   http://www.tancsa.com/