RE: [Xen-users] GPL PV drivers for Windows 0.9.11-pre12

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

> While these numbers seem to be true for the RX/TX tests between domU
<->
> dom0, they don't apply to the domU <-> other physical node on lan. The
> RX is fine, on my 100mbit lan I get about 94 / 95mbit. But the TX is
> very poor: only 18-20mbit. This has been since all versions I've
tested
> before, but of course hoped this one would make the difference. I've
> compared the results with a Linux domU PV, which does perform as
> expected (94-95mbit for both RX/TX).
> 

Thanks for the feedback. I wonder if Large Send Offload is causing
problems somewhere... Can you try turning off Large Send Offload and
report the results?

I am looking at why RX performance is about 1/3 the speed of TX, but am
surprised that TX is so poor when sending to a physical network...

Maybe wait about 20 minutes before testing as I'll upload a -pre13, as
-pre12 would sometimes (always?) crash when changing those network
settings.

In the meantime, can you please send me the output of a xenstore-ls
/local/domain/<id>/device/vif? Mine looks like this:

0 = ""
 state = "4"
 backend-id = "0"
 backend = "/local/domain/0/backend/vif/94/0"
 tx-ring-ref = "16093"
 rx-ring-ref = "16092"
 event-channel = "10"
 feature-no-csum-offload = "0"
 feature-sg = "1"
 feature-gso-tcpv4 = "1"
 request-rx-copy = "1"
 feature-rx-notify = "1"

Note the 'backend =' line above? Also send me the output of a
xenstore-ls of that, eg in my case 'xenstore-ls
/local/domain/0/backend/vif/94/0'

Thanks

James


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