Re: [Xen-users] Where is my CPU going?

[Ken Cobler <kcobler@xxxxxxxxxxxxxx>]

Quoting Enzo Lombardi <enzinol@xxxxxxxxx>:

> Hi all,
> I am trying to diagnose a lagging issue on one of my domains.
> Right now I have 3 DomU running + Dom0 and lagging is really bad. Even Dom0
> responsiveness is really low (sometimes it takes minutes to authenticate
> over SSH).
> I fiddled with sched-credit without success:
>                                          ID    Weight
> Domain-0                             0   6000    0
> dom1                                 12    256    0
> dom2                                11    256    0
> dom3                                   2    256    0
>
>
> The bad side is that dom1 is Windows and lagging is causing the
> kernel/drivers to crash.
> The machine is a single Xeon 1260L (4 Cores, 8 threads) with 20GB of RAM.
> Any hints?
> Thanks
> -e
SSH lags are not only caused by Xen time managment, but, by poorly  
constructed (or non-existent) DNS for the server and the guest OS.
Which version of Windows? I had a Windows 2008 system that was not  
responsive enough for the users (even though I knew the hardware was  
working well). It turns out a hotfix from Microsoft was required to  
clear up the non-responsive Windows 2008 server.
Ken Cobler


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