Xen users - Apr 2009 - Performance difference of running Linux in PV or FV mode?

Hey,

I have installed Ubuntu 8.10 with FV mode.

I use this server for web server (command line mode only, no X window)

So should I hack my current installation into a PV mode for production use?

In fact, any min. performanc gain suppose I should get? (Any bechmark?)

Thanks.

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That''s a really broad question. I think the best source of  
quantitative data would be to look for spec benchmarks run by vendors.

Subjectively, I have never used a FV VM that feels native. Also some  
of the early xen papers might measure this delta.


On Apr 12, 2009, at 6:44 AM, howard chen <howachen@gmail.com> wrote:
> Hey,
>
> I have installed Ubuntu 8.10 with FV mode.
>
> I use this server for web server (command line mode only, no X window)
>
> So should I hack my current installation into a PV mode for  
> production use?
>
> In fact, any min. performanc gain suppose I should get? (Any  
> bechmark?)
>
> Thanks.
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
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On Sun, Apr 12, 2009 at 5:44 PM, howard chen <howachen@gmail.com>
wrote:
> Hey,
>
> I have installed Ubuntu 8.10 with FV mode.
>
> I use this server for web server (command line mode only, no X window)
>
> So should I hack my current installation into a PV mode for production use?
Depends on what you need. In general PV guest would provide better performance.
If you absolutely need to use HVM (a.k.a Fully Virtualized) guest, be
sure to use PV drivers when possible.

You might also be interested in this
http://wiki.xensource.com/xenwiki/XenParavirtOps
>
> In fact, any min. performanc gain suppose I should get? (Any bechmark?)
>
I measured disk and network performance (with dd and iperf) comparing
Windows HVM guest (with and without GPLPV) and Linux PV guest on
opensolaris dom0. Not exactly the comparison you''re looking for, and
it might not reflect actual performance for real-life load, but it
should give a basic idea of the performance difference you''re going to
get.

https://opensolaris.org/jive/thread.jspa?messageID=355579

Regards,

Fajar

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