Re: [PATCH] raise tsc clocksource rating

H. Peter Anvin
2007-10-30T00:18:39Z

Glauber de Oliveira Costa wrote:
> From: Glauber de Oliveira Costa <glauber@t60.localdomain>
>
> tsc is very good time source (when it does not have drifts, does not
> change it's frequency, i.e. when it works), so it should have its rating
> raised to a value greater than, or equal 400.
>
> Since it's being a tendency among paravirt clocksources to use values
> around 400, we should declare tsc as even better: So we use 500.
>
> This patch also touches the comments on clocksource.h, which suggests
> that 499 would be a limit on the rating values.
>
> Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>

Are you sure these paravirt sources don't intentionally trump the TSC?

-hpa