RE: [Xen-users] Slow windows network with gplpv driver.

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

> 
> James,
> Is there anything in Server 2008 like PATCHTPR that needs to be
enabled,
> or does Server 2008 already work okay?  How about Server 2003, as its
> pretty much the same code base as XP?

Server 2003 sp2 (or was it sp1?) removed the TPR instructions from the
kernel and did things a slightly different way so it's not necessary
there.

> Also, I still have to disable checksum offloading and large send
> offloading in the GPLPV drivers to get decent performance - leaving
> these enabled yields very, very slow network performance on my Xen
> boxes, and disabling them shows a drastic improvement in network
> transfer rates.  not sure if this is a Xen version issue, but I've
seen
> it in Xen versions from 3.2.3 (SLES10) to 4.0.1 (OpenSuSE).  My
physical
> network cards have these features enabled, which really, really helps,
> but I seem to need to disable them in the domUs.
> 

Slow performance to where? DomU<->Dom0, DomU<->DomU, or DomU<->physical
network, or all of them?

James

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