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Date:      Thu, 27 Oct 2011 10:50:51 +0400
From:      Emil Muratov <gpm@hotplug.ru>
To:        Adrian Chadd <adrian@freebsd.org>
Cc:        freebsd-net@freebsd.org, Hooman Fazaeli <fazaeli@sepehrs.com>, Jason, Wolfe <nitroboost@gmail.com>, Mike Tancsa <mike@sentex.net>
Subject:   Re: Intel 82574L interface wedging on em 7.1.9/7.2.3 when MSIX	enabled
Message-ID:  <4EA8FF4B.3070704@hotplug.ru>
In-Reply-To: <CAJ-Vmo=%2B6NcDQXeoabWtewfDvnhMNaZcnGE5WzncT9WBk18H3w@mail.gmail.com>
References:  <CAAAm0r0RXEJo4UiKS=Ui0e5OQTg6sg-xcYf3mYB5%2Bvk8i8557w@mail.gmail.com>	<4E8F157A.40702@sentex.net>	<CAAAm0r2JH43Rct7UxQK2duH1p43Nepnj5mpb6bXo==DPayhJLg@mail.gmail.com>	<4E8F51D4.1060509@sentex.net>	<CACqU3MVwLaepFymZJkaVk6p=SpykGhqs=VYFjLh9fP9S=AxDhg@mail.gmail.com>	<CAAAm0r1DKvoL9=Ket9up=4%2B5xiCzTTZJK99FhF9jcCA28B0M%2BA@mail.gmail.com>	<CAAAm0r3XdsMHZh%2BP_NF-txZasdExzwZ8ymmGQgGhJQds0fOiBQ@mail.gmail.com>	<CAAAm0r1iS3z-7CBJ=xYDf%2BJOA1Q2nU0O54Twbyb7FjvgWHjKVw@mail.gmail.com>	<4EA7E203.3020306@sepehrs.com>	<CAAAm0r3Nr2t8cCetPkFnLQ-3KwqHw_0SpqbtvYPRUkSP=9n8CA@mail.gmail.com>	<4EA80818.3030504@sentex.net> <4EA80F88.4000400@hotplug.ru> <CAJ-Vmo=%2B6NcDQXeoabWtewfDvnhMNaZcnGE5WzncT9WBk18H3w@mail.gmail.com>

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>> Hi All,
>> I've got almost the same problem with intel 82574L based nic. My platform is
>> nvidia ion running Atom 1.6 and nic is an external PCI-express adapter.
>> Unlike Jason's case mine is always stuck in receiving traffic, it's Ierrs
>> increasing while Ipkts not. Thanks to Jason's script I can see those locks
>> and interface flapping every several hours. My system is not a heavy loaded
>> server but just a home nas/router, usually routing at 100 mbps or less.
>> Nither disabling MSIX nor tuning txd rxd doesn't help me.
>>
> Hi,
>
> When this occurs, does this completely lock up with RX traffic? Ie,
> _no_ valid RX traffic occurs?
> If so, does the error count increase 1:1 with what traffic you're
> trying to send to it?
>
Hi Adrian
Yes, it's completely locked - ping packet loss to the interface is 100%, 
I also managed to run tcpdump -ni em0 and there were only outgoing 
packets from the interface but no packets arrived to the interface. As 
for the error counter ratio - I'm not sure about it, don't know how 
check this besides comparing counters on the switch with interface, but 
it's a little bit complicated to catch in time.






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