Re: HZ, preferably as small as possible

From: Daniel Phillips (phillips@arcor.de)
Date: Wed Jul 17 2002 - 16:16:25 EST


On Wednesday 17 July 2002 23:02, Linus Torvalds wrote:
> On Wed, 17 Jul 2002, Richard B. Johnson wrote:
> >
> > It is hardly novel and I can't imagine how Bresenham or whomever
> > could make such a claim to the obvious. Even the DOS writer(s) used
> > this technique to get one-second time intervals from the 18.206
> > ticks/per second.
>
> Ehh.. Look at _existing_ linux code to do exactly the same.
>
> See update_wall_time_one_tick() and second_overflow() (which does a lot
> more besides, but it does largely boil down to this "average fractions
> using basic integer math" thing.

I see lots of stuff in there all right, but I don't see anything that
implements the numerator/denominator error analysis technique I
described above. Maybe I just didn't look hard enough.

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



This archive was generated by hypermail 2b29 : Tue Jul 23 2002 - 22:00:24 EST