[Xen-users] HVM domU Windows gets blocked for extended time

[Ken Cobler <kcobler@xxxxxxxxxxxxxx>]

OpenSuse 10.3 dom0 running Xen 3.0.  Have Windows XP and Windows 2003 
domU guests.
Sporadically, the Windows guest is blocked (no mouse movement, keyboard 
response) sometimes for 30-45 seconds.  Then, the domU comes alive and 
catches up with keystrokes that were in the buffer.
The client workstations are thinstation (linux based terminals that run 
rdesktop to Windows 2003).
Since the server is a 8G RAM, Quad-core Intel, I tried pinning  dom0 to 
CPU0, domU Windows 2003 to CPU1 and CPU2, and domU Windows XP to CPU3.  
No real change in outcome.
I have also tried using the sched-credit adjustments for weight on the 
domU guests.
Currently, these guests are using the qemu driver for hard drive.

Any suggestions on how to resolve this problem?   Would going to the 
SEDF scheduler be more appropriate?  Could this be a network issue ?
Xen has worked great for this environment except for the sporadic blocking.

Ken Cobler



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