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Re: [Xen-devel] [Patch] Fix the slow wall clock time issue in x64 SMP Vista

To: "Cui, Dexuan" <dexuan.cui@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
From: Keir Fraser <keir@xxxxxxxxxxxxx>
Date: Wed, 10 Jan 2007 11:36:51 +0000
Cc: Keir Fraser <keir@xxxxxxxxxxxxx>
Delivery-date: Wed, 10 Jan 2007 03:36:35 -0800
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
Thread-index: Acc0qpECUWE/uVerTTS+WkRpZ1GU0QAAQ2zN
Thread-topic: [Xen-devel] [Patch] Fix the slow wall clock time issue in x64 SMP Vista

On 10/1/07 11:29, "Cui, Dexuan" <dexuan.cui@xxxxxxxxx> wrote:

> In x64 SMP Vista HVM guest (vcpus=2 in the configuration file), the wall
> clock time is 50% slower than that in the real world. The attached patch
> fixes the issue.

Looks like this code will inject fewer HPET interrupts. How does that make
time go *faster*?

Also, looking at hpet_timer_fn() is vcpu_kick() actually required? The PIC
logic invoked from hpet_route_interrupt() should do any required kicking.

 -- Keir

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