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RE: [Xen-devel] [RFC] Remove the x86 Periodic 100HZ PIT TimerInterrupt

  • To: "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Yu, Ke" <ke.yu@xxxxxxxxx>
  • Date: Thu, 10 Apr 2008 16:38:51 +0800
  • Delivery-date: Thu, 10 Apr 2008 01:39:25 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AciYkFQNYmyqI0NSRKuabH1qVznbFQABlbckAB8ySAAADBThegBoLeBg
  • Thread-topic: [Xen-devel] [RFC] Remove the x86 Periodic 100HZ PIT TimerInterrupt

Hi Keir,

The attached are patches for this RFC. It has been tested again
changeset 17427. Please feel free to change the PIT handling logic.

Best Regards

Keir Fraser wrote:
> On 8/4/08 02:29, "Yu, Ke" <ke.yu@xxxxxxxxx> wrote:
>> The logic in my mind is as follow, just want to make sure it leave
>> enough space for you to refine PIT handling logic.
>> 1. when xen is booting, setup PIT timer interrupt
>> 2. if Cyclone/HPET/ACPI PM timer is clock source, setup AC timer for
>> the overflow handling 
>> 3. if not using PIT and CPU has APIC, then disable PIT timer
>> interrupt. 
> This is close enough for me to tweak, so I'll be happy if you could
> make a patch for this.
>  Thanks,
>  Keir

Attachment: 2_remove_timer_interrupt.patch
Description: 2_remove_timer_interrupt.patch

Attachment: 1_remove_jiffies.patch
Description: 1_remove_jiffies.patch

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