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

[Kreved <krevedinho@xxxxxxxxx>]

Hello!

> My RDP connections continue uninterrupted.

So do mine. It just freezes for a second when a pop-up window appears.

> Does it behave the same without the PV drivers installed?

No. The only two ways to workaround this problem are either to boot with 
"NOGPLPV" or to use VNC.

Also I've migrated the VM to older kernel(2.6.31.12-0.1-xen) with no success.

Here's the vm config, maybe I missed something:

name = 'win-seven'
memory  = '768'
bootloader = "hvmloader"
disk = [
    'file:/data/win-seven.img,hda,w',
]
vif = [
        'mac=10:78:c0:a8:69:69',
#       'model=e1000',
]
vfb = ['type=vnc,vnclisten=0.0.0.0,vncdisplay=491']
builder='hvm'
acpi=1
apic=1
boot='dc'
usbdevice='tablet'
timer_mode=1

09.02.2012, 02:10, "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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