Porting Fiasco+L4re to DaVinci DA850 - Linux time wrong

Peter Howard pjh at northern-ridge.com.au
Wed May 21 01:03:23 CEST 2014


On Wed, 2014-05-21 at 00:50 +0200, Adam Lackorzynski wrote:
> On Tue May 20, 2014 at 10:47:03 +1000, Peter Howard wrote:
> > I've now got L4Linux running on top of Fiasco+L4re on the DA850. However
> > there appears to be something wrong with the time.  Time seems to be
> > passing at a rate of 10-1 (i.e. 1 elapsed second == 10 reported seconds)
> > in Linux.  If I change the default Hz rating  the L4Linux config (from
> > 100Hz) in either direction L4Linux either hangs or slows down
> > dramatically.  If I change the period in the timer driver (in the Fiasco
> > bsp directory) things hang earlier.
> > 
> > For the Fiasco BSP I'm using:
> >       * timer_tick-single-vector for timer_tick_IMPL,
> >       * clock_generic for clock_IMPL,
> >       * a da850 timer driver for timer_IMPL.
> > 
> > Can someone enlighten me as to how it should work?
> 
> I wonder whether Fiasco's timer has the proper frequency. hello's "Hello
> World" should be displayed once a second. Is that the case or is it
> more/less often?
> 

It spits out "Hello World!" _way_ faster than once per second.
Something like 15-20 times a second.  So the problem is in Fiasco.

> 
> Adam

-- 
Peter Howard <pjh at northern-ridge.com.au>




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