Re: [Xenomai-core] Timer optimisations, continued

2006-07-27 Thread Philippe Gerum
On Tue, 2006-07-25 at 20:26 +0200, Jan Kiszka wrote: massive snippage To summarise these lengthy results: o ns-based xntimers are nice on first sight, but not on second. Most use-cases (except 5) require less conversions when we keep the abstraction as it is. The current

Re: [Xenomai-core] Timer optimisations, continued

2006-07-27 Thread Philippe Gerum
On Thu, 2006-07-27 at 14:42 +0200, Gilles Chanteperdrix wrote: Philippe Gerum wrote: o A further improvement should be achievable for scenarios 4 and 5 by introducing absolute xntimers (more precisely: a flag to differentiate between the mode on xntimer_start). I have an

Re: [Xenomai-core] Timer optimisations, continued

2006-07-27 Thread Philippe Gerum
On Thu, 2006-07-27 at 15:54 +0200, Jan Kiszka wrote: Philippe Gerum wrote: On Thu, 2006-07-27 at 14:42 +0200, Gilles Chanteperdrix wrote: Philippe Gerum wrote: o A further improvement should be achievable for scenarios 4 and 5 by introducing absolute xntimers (more precisely: a

[Xenomai-core] Timer optimisations, continued

2006-07-25 Thread Jan Kiszka
Hi all, to continue the discussion about improving the timer subsystem, specifically with respect to unit conversion overhead, I'm posting here a (fairly long) report of my findings and consideration. First of all I did some benchmarking of the various optimised conversion routines that popped

[Xenomai-core] timer optimisations

2006-05-22 Thread Jan Kiszka
Hi, while I originally only wanted to add timer abstraction to RTDM, I now have patch series for xntimer pending on my box pushing this layer closer to hrtimer. But before posting it for discussion (needs further testing anyway), I have two questions regarding some minor though not totally