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

To: Akio Takebe <takebe_akio@xxxxxxxxxxxxxx>, Alex Williamson <alex.williamson@xxxxxx>
Subject: RE: [Xen-ia64-devel] Time for hybrid virtualization?
From: Kayvan Sylvan <kayvan@xxxxxxxxx>
Date: Thu, 24 Jan 2008 17:16:32 -0800
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Thread-topic: [Xen-ia64-devel] Time for hybrid virtualization?
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.


-----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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