Re: [Xenomai-help] Latency calculation and test

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

Philippe Gerum wrote:
> Sidenote: It obviously makes no sense to stuff gigantic values
> into /proc/xenomai/latency; large core latencies are likely the sign of
> 1) a bug in the arch-dep section (probably Adeos), 2) inadequation of
> the hw for real-time usage (e.g. some ARM platforms with MMU, mmm...
> issues).

Here I disagree: if a platform run ten times slower than another, why
not having a latency ten times bigger ?


> Said differently, I had no clue, so I'm expecting users to have some.

Additionnaly, the latency depends on the kind of load put on the system
during the test. A user is expected to calibrate the nucleus latency of
his system under the particular load which is expected on his system.

We should add a page on the wiki about the latency calibration.

-- 
                                                 Gilles Chanteperdrix