[Asterisk-Dev] Re: ztdummy accuracy improvements on kernel 2.6

Rich Adamson radamson at routers.com
Mon May 16 08:21:35 MST 2005


> > On May 16, 2005 08:59 am, Tony Mountifield wrote:
> > > I think what is happening is that the zaptel processing invoked by 
> > > ztdummy is not happening quite often enough due to missed jiffies. 
> > > Consequently I suspect the incoming IAX channels are not being 
> > > serviced often enough, and are building up a backlog.
> > 
> > If ztdummy's hitting it 1024 times a second instead of 1000 
> > wouldn't that indicate that it was servicing it too often?
> > 
> > -A.
> 
> >From the original email:
> 
> which is to set the rtc irq to 1024Hz (it must be a power of 2), and
> then skip 3 out of every 128 irqs (evenly spaced) to give 1000 zaptel
> interrupts each second.

I might be way off base here, but wasn't it determined that interrupt
requirements really were 1024 per second (not 1000/sec)? (I'm not the
OP.)





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