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Re: [Xen-users] Problems with GPLPV network latency

To: <xen-users@xxxxxxxxxxxxxxxxxxx>, "Ian Tobin" <itobin@xxxxxxxxxxxxx>
Subject: Re: [Xen-users] Problems with GPLPV network latency
From: "Nick Couchman" <Nick.Couchman@xxxxxxxxx>
Date: Tue, 08 Jun 2010 09:20:21 -0600
Delivery-date: Tue, 08 Jun 2010 08:23:54 -0700
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I see some of the same behavior - pings from my Windows-based domUs with GPL PV 
drivers have seemingly random latency times from < 1 ms to more than 8000 ms.  
The funny thing is that I *know* this isn't the actual latency, since I would 
notice a ping taking 8 seconds to get back - it happens very, very rapidly.  
There must be something in the GPL PV network driver code that is supposed to 
(help) compute this that is malfunctioning.


>>> On 2010/06/08 at 02:31, "Ian Tobin" <itobin@xxxxxxxxxxxxx> wrote: 
> Hi,
> DomU is a Win2008 R2 64 
> When i install the GPLPV drivers the network latency goes from 15ms to
> random numbers up to 1200ms and eventually dies.  If you run a ping from
> the DomU to another host the network stays alive but the high latency is
> still there.
> Further more if i try and uninstall the network driver i am unable to
> use the old one (realtek) as it cannot detect the device.
> Also if I uninstall everything using the installer the DomU blue screens
> on reboot, im not sure how to get round that without a rebuild?
> Thanks
> Ian

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