Re: [PATCH] Convert alpha to use arch_gettimeoffset()

[Richard Henderson]

john stultz wrote:
> On Fri, 2009-06-12 at 00:03 -0700, Richard Henderson wrote:
>   
> > john stultz wrote:
> >     
> > > I suspect the alpha arch could even be further improved to provide and
> > > rpcc() based clocksource, but not having the hardware, I don't feel
> > > comfortable attempting the more complicated conversion (but I'd be glad
> > > to help if anyone else is interested).
> > >       
> > Unfortunately this isn't possible.  The rpcc value is only 32-bits wide,
> > and so rolls over in approx 3 to 4 seconds.  Thus all the contortions to
> > try and use the truncated value for sub 1 second adjustments.
> >     
>
> That's actually ok. The ACPI PM clocksource on x86 is only 24 bits wide
> and wraps every 5 seconds. The generic timekeeping code handles the
> wrapping and accumulation for you.
>   
Interesting.
> Might you create a patch that does this conversion and apply it on top
> of mine? 
Unfortunately I don't have working hardware anymore.  Perhaps Ivan will 
be able to help here.


r~
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