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Re: [Xen-devel] Re: [Xen-users] ntpd under Xen Dom0 exhibits extremely

To: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Re: [Xen-users] ntpd under Xen Dom0 exhibits extremely high jitter/noise? runs stable/quiet under non-xen kernel.
From: mail ignored <0.bugs.only.0@xxxxxxxxx>
Date: Tue, 19 Jan 2010 10:24:27 -0800
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On Tue, Jan 19, 2010 at 10:04 AM, Keir Fraser <keir.fraser@xxxxxxxxxxxxx> wrote:
> On 19/01/2010 17:58, "mail ignored" <0.bugs.only.0@xxxxxxxxx> wrote:
>
>>> If this does
>>> turn out to be a hardware issue, then yes that is just the kind of case
>>> where you might expect to have to tweak things on the Xen command line.
>>
>> the 'common' hardware is, of course, the AMD Phenom II X4 cpu ...
>
> The particular hardware that really matters is the chipset, as that is where
> the HPET resides. Is that common across all the systems?
>

no, not identical,

(1)(2) ASUS M4A78T-E
  North Bridge          AMD 790GX
  South Bridge  AMD SB750

(3)    MSI 790FX-GD70
  North Bridge  AMD 790FX
  South Bridge  AMD SB750

(4)(5) GIGABYTE GA-MA770T-UD3P
  North Bridge  AMD 770
  South Bridge  AMD SB710

but, perhaps, related enough?

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