Re: [PATCH] Re: boot time, process start time, and NOW time

[Tim Schmielau]

On Tue, 30 Aug 2004, Albert Cahalan wrote:

> On Mon, 2004-08-30 at 19:38, john stultz wrote:
> 
> > This isn't going to happen instantly by any means. I'm trying to
> > get the time of day rework finished as soon as I can, but I've
> > got the day job to do as well. In the mean time, we can staple gun
> > any user visible exported HZ/jiffies values so they are accurate
> > (using ACTHZ or gettimeofday), and also look into changing HZ to a
> > less error-ful value.  HZ=1001 has been suggested and looks quite  
> > promising (although /net/schec/estimator.c wants a power of 4).
> 
> Well, pick something else. Here's a list of choices with
> error under 0.0025%, in the 240..1300 range, that can be
> evenly divided by four.

I don't think this is the main issue. We are not talking about slight 
rounding errors that might (and in many places are) be accounted for,
but with real inconsistencies that arise whenever the system clock is
adjusted. This e.g. was the source of the 15 minutes error that I saw in 
my recent testing.

Tim
-
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/