[Xenomai-help] Xenomai User Space: Using 100% CPU power

["M. Koehrer" <mathias_koehrer@domain.hid>]

Hi everybody,

I have an application where I need extreme precise timing (about 1µs) for a couple of seconds
using a standard PC (to access a I/O PCI board).
For this, I want to write an application that initializes normally and 
whenever the software is in a certain state, I want to enter a  "high-precision-timing mode".
In this high-precision-timing mode, I want to disable all interrupts and poll permanently on a PCI I/O board.
The timing itself can be directly taken from the CPU's TSC using rdtsc.
Within this mode, the time measurement of register changes on the PCI I/O board is very important.
After a couple of seconds, when all relevant data is taken, I want to leave this
"high-precision-mode" and come back to the normal mode.
Then the measurement results are interpreted in detail.
All this should happen in user mode, not in kernel mode.

My questions are now: 
Is this possible using Xenomai?
How can I enter a mode that disables all interrupts (including timer) for a while?

Thanks for any help on this!

Regards

Mathias




-- 
Mathias Koehrer
mathias_koehrer@domain.hid


Viel oder wenig? Schnell oder langsam? Unbegrenzt surfen + telefonieren
ohne Zeit- und Volumenbegrenzung? DAS TOP ANGEBOT JETZT bei Arcor: günstig
und schnell mit DSL - das All-Inclusive-Paket für clevere Doppel-Sparer,
nur  44,85 €  inkl. DSL- und ISDN-Grundgebühr!
http://www.arcor.de/rd/emf-dsl-2