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List:       e1000-devel
Subject:    Re: [E1000-devel] guest with igbvf on 82576 can't talk to host
From:       "Rose, Gregory V" <gregory.v.rose () intel ! com>
Date:       2010-05-28 19:40:54
Message-ID: 43F901BD926A4E43B106BF17856F0755A7AD48EE () orsmsx508 ! amr ! corp ! intel ! com
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> -----Original Message-----
> From: Gerd v. Egidy [mailto:lists@egidy.de]
> Sent: Friday, May 28, 2010 12:05 PM
> To: Rose, Gregory V
> Cc: e1000-devel@lists.sourceforge.net
> Subject: Re: [E1000-devel] guest with igbvf on 82576 can't talk to host
> 
> Hi Greg,
> 
> > watch -n 2 'ethtool -S <ethx> | grep packets'
> > 
> > Then watch the tx queue packet stats.  We're thinking that when the
> problem
> > occurs that the VF is not able to communicate with the PF you will see
> > packets from the PF to the VF going out on tx queue 1.  When it works
> > you'll see packets going out on tx queue 0.
> 
> I just did 6 reboots of the host until I got each of the 3 cases of my
> last
> mail at least once.
> 
> It is as you describe:
> 
> when the packets are not received by the vm, the tx queue 1 counter
> increases
> when the packets are received, the tx queue 0 counter increases.
> 
> when I have a case where arp is received and other traffic not, arp
> increases tx
> queue 0 and the other traffice queue 1.

OK, thanks for the confirmation.  We'll be looking at a solution on our end and hope \
to get back to you soon.

Regards,

- Greg



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