[Kamailio-Devel] Kamailio Timer Accuracy

[Jason Penton]

Hi Henning

yes a 1s interval timer registered through the timer API. I then count the
ticks corresponding to 5 mins (current ticks + (5*60)). At the end the
stopwatch (wallclock) reads 5min and 20 secs. My question is what the impact
on for example the Dailog module which relies on these timers for timeouts,
etc. A timeout on a dialog of for example 3600 will be horribly out.

Cheers
Jason

On Wed, Sep 24, 2008 at 11:22 AM, Henning Westerholt <
henning.westerholt at 1und1.de> wrote:

> On Tuesday 23 September 2008, Jason Penton wrote:
> > I was testing the Kamailio timer API today and noticed some inaccuracy
> and
> > wondered if this was known?
> >
> > If I register a 1 second interval timer and count the ticks I get a
> > discrepancy of almost 20s per 5 minutes inaccuracy. What is the feeling
> on
> > this?
>
> Hi Jason,
>
> do you mean if you register a 1 second interval timer, then after 5 minutes
> it
> goes 20 seconds wrong? Wrong to the wallclock, or wrong with regards to
> another timer(s)?
>
> 20 seconds inaccuracy on 5 minutes is too much. For comparision, we use a
> simple sleep based timer approach for some maintainance stuff in older
> code,
> here we get about 1 seconds inaccuracy per 2 hours with a 10 seconds
> interval.
>
> Cheers,
>
> Henning
>
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