Re: CFS review

From: Arjan van de Ven
Date: Wed Aug 01 2007 - 10:05:29 EST



> but that's nothing new. CFS cannot conjure up time measurement methods
> that do not exist. If you have a low-res clock and if you create an app
> that syncs precisely to the tick of that clock via timers that run off
> that exact tick then there's nothing the scheduler can do about it. It
> is false to charachterise this as 'sleeper starvation' or 'rounding
> error' like you did. No amount of rounding logic can create a
> high-resolution clock out of thin air.


CFS is only as fair as your clock is good.


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/