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Re: [Xen-devel] recurring boot time scalability issues affecting time ma

To: "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] recurring boot time scalability issues affecting time management
From: "Jan Beulich" <JBeulich@xxxxxxxxxx>
Date: Tue, 11 May 2010 09:51:28 +0100
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>>> Keir Fraser <keir.fraser@xxxxxxxxxxxxx> 11.05.10 09:57 >>>
>On 11/05/2010 07:59, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote:
>> I wonder whether the time handling code in Xen itself shouldn't/can't
>> therefore be made more robust, or at least reliably detect this sort of
>> issue (from past analysis of similar problems, the platform timer is
>> rolling over due to there not being frequent enough invocations of
>> plt_overflow()) to make analysis of the problem easier.
>Something like the attached?

Yes, except that you probably mean __builtin_llabs() rather than

Thanks! Jan

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