Re: [Xen-users] GPLPV, RDP and network latency

[James Harper <james.harper@xxxxxxxxxxxxxxxx>]

> 
> Hello!
> 
> Has anybody experienced network latency problems with combination of
> Windows 7, GPLPV drivers and RDP connection?
> Any Windows pop-up message(such as "command not found" error message
> in "Run command:" dialog, or dividing by zero in windows calc) causes a short
> freeze of RDP session and looks like that from dom0:
> 
> PING 192.168.44.65 (192.168.44.65) 56(84) bytes of data.
> 64 bytes from 192.168.44.65: icmp_seq=1 ttl=128 time=0.649 ms
> 64 bytes from 192.168.44.65: icmp_seq=2 ttl=128 time=0.232 ms
> 64 bytes from 192.168.44.65: icmp_seq=3 ttl=128 time=0.273 ms
> 64 bytes from 192.168.44.65: icmp_seq=4 ttl=128 time=501 ms
> 64 bytes from 192.168.44.65: icmp_seq=5 ttl=128 time=0.205 ms
> 64 bytes from 192.168.44.65: icmp_seq=6 ttl=128 time=0.463 ms
> 64 bytes from 192.168.44.65: icmp_seq=7 ttl=128 time=0.206 ms
> 
> where 192.168.44.65 is domU address. The latency may vary from 500 to
> 10000 ms.
> 
> The very same actions taken via VNC connection to VM work fine without
> any problem.
> We have tried different Windows 7 distros, 32- and 64-bit editions, Windows
> and Linux RDP clients, with the same result.
> 
> Software used:
> Xen version 4.1.2_05-1.1.1 (abuild@) (gcc version 4.6.2 (SUSE Linux) ) Sun Oct
> 30 03:25:04 UTC 2011
> gplpv_Vista2008x32_signed_0.11.0.308
> Windows 7 SP1
> 
> timer_mode is set to 1, offload settings are:
> Offload parameters for vif2.0:
> rx-checksumming: off
> tx-checksumming: off
> scatter-gather: off
> tcp-segmentation-offload: off
> udp-fragmentation-offload: off
> generic-segmentation-offload: off
> generic-receive-offload: off
> large-receive-offload: off
> rx-vlan-offload: off
> tx-vlan-offload: off
> ntuple-filters: off
> receive-hashing: off
> 
> Thanks in advance!
> 

I can't reproduce this. My RDP connections continue uninterrupted.

Does it behave the same without the PV drivers installed?

James

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