Re: [Xen-users] ping in hvm domain not working correctly

[Stephan Seitz <s.seitz@xxxxxxxxxxxx>]

If you encounter this problem only by using more than one VCPUs,
you might try to pin the HVM domU to cores located at one particular
CPU.  (e.g. cpu='2,3')
This is just a guess, but it might solve time shift problems.

Greetings

Stephan



Martin Goldstone schrieb:
> I'm guessing your using more than 1 VCPU in your HVM domains?  I
> encountered the same problem.  I'm not entirely sure what causes the
> problem (it may have something to do with timing figures from different
> VCPUs), but I'm not experiencing any problems caused by this, just the
> inconvenience of an odd time.  The ICMP packets are still being
> delivered properly.  Sadly, I've not been able to find a solution, aside
> from using only 1 VCPU.
> 
> Of course if you are using only 1 VCPU, then this may not be the cause
> of your problem.  You could try pinning the VCPU to one physical CPU.
> I'm not sure it'll have an effect, but it's worth a try.
> 
> Mart
> 
> Artur Linhart - Linux communication wrote:
>> Hello,
> 
> 
> 
>>             I have found a strange behavior if pinging from the HVM domain
>> (windows). I reproduced this behavior on different physical machines once in
>> DomU Windows 2003 Server Enterprise x64 R2 and once in Windows 2000 advanced
>> server (both with latest patches). 
> 
>> On both machines the ping response times seem to be generated randomly if
>> running the OS instance as DomU (also negative response times are generated
>> or received within the ICMP) - this could mean the ICMP packets are not
>> delivered correctly by xen to DomU?

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