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Re: [Xen-devel] HZ=1000 with Xen?

from [Kurt Garloff]

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To:	Diwaker Gupta <diwakergupta@xxxxxxxxx>
Subject:	Re: [Xen-devel] HZ=1000 with Xen?
From:	Kurt Garloff <kurt@xxxxxxxxxx>
Date:	Fri, 11 Mar 2005 14:47:44 +0100
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Hi,

On Thu, Mar 10, 2005 at 11:24:49AM -0800, Diwaker Gupta wrote:
> AFAIK, right now both the Xen hypervisor and the guests run with a HZ
> value of 100. Is there any fundamental problem running them at 1000
> instead? (well I am trying it now, so I'll know if it even runs at
> all, but I just wanted to know if there were any deeper issues)

1000 timer interrupts per second sent to every domain would be 
detrimental to performance if you think of many domains.

Regards,
-- 
Kurt Garloff                   <kurt@xxxxxxxxxx>             [Koeln, DE]
Physics:Plasma modeling <garloff@xxxxxxxxxxxxxxxxxxx> [TU Eindhoven, NL]
Linux: SUSE Labs (Director)    <garloff@xxxxxxx>            [Novell Inc]

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