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[Xen-devel] RE: About pit irq


  • To: 'Keir Fraser' <keir.fraser@xxxxxxxxxxxxx>, 'xen-devel' <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
  • Date: Wed, 19 Nov 2008 16:54:42 +0800
  • Accept-language: en-US
  • Acceptlanguage: en-US
  • Cc:
  • Delivery-date: Wed, 19 Nov 2008 00:55:39 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AclJ6rZmkfZkqKK6QNCPP6epkry8AQANMC+dAAAN6CAAAQqv4QAAF40Q
  • Thread-topic: About pit irq

>From: Keir Fraser [mailto:keir.fraser@xxxxxxxxxxxxx] 
>Sent: Wednesday, November 19, 2008 4:50 PM
>
>On 19/11/08 08:22, "Tian, Kevin" <kevin.tian@xxxxxxxxx> wrote:
>
>> I see. Yes, a slower tick is better since maximum overflow for
>> pit ch2 is about 54ms, and xen has already be a tickless
>> model.
>
>Most systems will have ACPI PM or HPET timer though, right? Does PIT
>platform timer inefficiency matter? Hacking on it more is a pain.
>
> -- Keir
>

Agree.

Thanks,
Kevin
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