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Re: [Xen-users] Questions about 1000HZ Kernel

from [Pasi Kärkkäinen]

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To:	Christian Maile <cmaile@xxxxxxxx>
Subject:	Re: [Xen-users] Questions about 1000HZ Kernel
From:	Pasi Kärkkäinen <pasik@xxxxxx>
Date:	Tue, 21 Sep 2010 14:38:53 +0300
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On Tue, Sep 21, 2010 at 11:51:02AM +0200, Christian Maile wrote:
> Hello,
> 
> The XEN kernel in "XEN RELEASE-4.0.1" is shipped with the following
> config parameters:
> 
> CONFIG_HZ_1000=y
> CONFIG_HZ=1000
> 
> At many blogs and forums there is a discussion that the CONFIG_HZ
> parameter should be changed to 250 HZ or 300 HZ.
> 
> We will operate a DomU and the Dom0 with the same 1000HZ Kernel. Is this
> setup possible and recommended. How high is the performance cut-off?
> 

There's no need to use the same kernel in dom0 and domUs.

> Which option is more suitable for Xen systems?
> 

Depends on what you need :)

-- Pasi


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