linux-kernel - Re: question about periodic clocks

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Date:	Sat, 10 Mar 2007 08:37:42 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	tglx@...utronix.de
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: question about periodic clocks

Thomas Gleixner wrote:
> Uuurg. That's ugly. clockevents expect a per CPU timer especially for
> dynamic ticks. If you cannot provide a per cpu timer, then you probably
> need to use the broadcast trick.
>   

Ah, apologies, I'm wrong about this.  I misread the Xen code; the timers
are per-vcpu, but as an implementation detail within the hypervisor it
keeps track of which real cpu is managing that timer.  But logically the
timers are per-vcpu.

    J
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