RE: [Xen-ia64-devel] Time for hybrid virtualization?

["Xu, Anthony" <anthony.xu@xxxxxxxxx>]

Hi Kayvan

Thanks for your work and sharing.

Can you repost the performance data for native/domU by using the same
format as this one?
That would be more clear.

Thanks,
Anthony




Kayvan Sylvan wrote:
> The overhead was calculated by taking the jobs/minute from the
> RE-AIM7 benchmark for the HVM guest and comparing it against the same
> measure when running on the native machine.  
> 
> Environment             Forks   Jobs/min
> --------------------------------
> native 2-cpu    31      4009.9
> xen HVM 2-cpu   31      3558.7
> 
> native 4-cpu    133     8009.4
> xen HVM 4-cpu   51      6854.3
> 
> native 8-cpu    81      15898.3
> xen HVM 8-cpu   81      12462.5
> 
> native 16-cpu   157     30840.2
> xen HVM 16-cpu  41      11308.0
> 
> If there is some better benchmark or measure that I can use, I would
> be happy to do it. 
> 
> I'm working on creating equivalent environments on a Montvale machine
> and on x86_64 for comparisons. 
> 
>                         ---Kayvan
> 
> -----Original Message-----
> From: Akio Takebe [mailto:takebe_akio@xxxxxxxxxxxxxx]
> Sent: Thursday, January 24, 2008 5:06 PM
> To: Kayvan Sylvan; Alex Williamson
> Cc: xen-ia64-devel
> Subject: RE: [Xen-ia64-devel] Time for hybrid virtualization?
> 
> Hi, Kayvan
> 
>> For the Montecito chip, running the RE-AIM7 compute workload, we
>> have the following preliminary summary:
>> 
>> Native vs. Xen performace
>> ----------------------------------
>> At 2-CPU, the overhead was 13%.
>> At 4-CPU, the overhead was 17%
>> At 8-cpu, overhead was 28%
>> At 16-cpu, the overhead was 173%
> Interesting. But what does "overhaed was 173%" mean?
> 
> Best Regards,
> 
> Akio Takebe
> 
> 
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