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Re: AW: [Xen-devel] Clocksources and other mysteries


  • To: Carsten Schiers <carsten@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
  • Date: Mon, 12 Jan 2009 12:03:37 +0000
  • Cc:
  • Delivery-date: Mon, 12 Jan 2009 04:04:02 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: Acl0rcy+UymSpYwDPkCmYogPPUBNXg==
  • Thread-topic: AW: [Xen-devel] Clocksources and other mysteries

On 12/01/2009 11:48, "Carsten Schiers" <carsten@xxxxxxxxxx> wrote:

> It's everytime when cpufreq_ondemand or cpufreq-set changes the frequency,
> aprox. 3 messages per event.
> Is that occasional? I tend to say: no. Please see an excerpt below. And if
> it's not occasional, what
> could I do? And by the way: I found no code that TSC will get adjusted, so I
> think it will get worse
> over the time...

Yeah, those deltas are huge. Almost a second in some cases. Something up in
the AMD cpufreq management code.

 -- Keir



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