Re: [PATCH -tip, final] perf, x86: Add hw_watchdog_set_attr() in asake of nmi-watchdog on P4

[Ingo Molnar]

* Cyrill Gorcunov <gorcunov@xxxxxxxxx> wrote:

> On Tue, Jul 05, 2011 at 12:59:59PM +0200, Ingo Molnar wrote:
> ...
> > 
> > are 'non-sleeping ticks' non-halted cycles - i.e. cycles that 
> > always count with CPU frequency and can thus be used for periodic 
> > frequencies?
> 
> Yes, I think so (btw, as far as I remember oprofile does the same 
> 'threshold' gaming for nmi-watchdog).

But the NMI watchdog does not need a constant frequency event - it 
can use unhalted cycles just fine. Why does it need unhalted cycles 
on P4?

Thanks,

	Ingo
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