Re: [Xenomai-help] clock problem

[Philip Ha <philwman@domain.hid>]

[-- Attachment #1: Type: text/plain, Size: 876 bytes --]


> The cpu frequency is obtained by the linux kernel calibration procedure.
> This same procedure returns the same imprecise results without xenomai.
> Now, something in the distro kernel must change the frequency to a nice
> round value (a good candidate would be the cpufreq module, except that
> the acpi_cpufreq module does not seem to load on my atom).
>
> As a workaround, xenomai proposes kernel parameters to adjust the idea
> of the machine clock/cpu frequency. Try adding the following argument on
> the kernel command line:
>
> xeno_hal.clockfreq=1600000000 xeno_hal.cpufreq=1600000000


Hi Gilles,

Thank you very much for your help and advice. I tried it out on
our PC, and it worked. The latency between messages stays constant
(only varies to a few microseconds) after each reboot. 

I really appreciate for your help and patience.

Best regards,

Philip Ha 



[-- Attachment #2: Type: text/html, Size: 1115 bytes --]