[Xenomai-core] My work on Xenomai integration to LTTng / LTTV

[Jean-Olivier Villemure <jean-olivier.villemure@domain.hid>]

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Hello,

I'm currently working on the integration of Xenomai tracing in LTTng
(Linux Trace Toolkit Next Generation) and the event viewing in LTTV
(Linux Trace Toolkit Viewer).

At this moment, I 'm tracing events about task handling, period and
soon, mutex and semaphore synchronization.

Inserting traqcing points in Xenomai nucleus is not very difficult, my
main work is focus on the controlflow viewer module of LTTV. At this
moment, we can open a trace and view:
- Task state : init, started, running, suspended, overrunning (period
miss)
- Period timer tick for periodic task
- Textual information about the task (name, period, priority, birth)
- Mutex/semaphore owned by specific task
- Soon task waiting on mutex/semaphore

Look at the screenshot to have a better idea.

The next step will be to generate some statistics, for this step I will
need your help. As Xenomai users, which kind of stats would you want to
compute?

After that, I'll study the possibilities of simulating an execution
trace from an existing trace by modifying some parameters (period
length, ...)

Any ideas are welcome!

Jean-Olivier Villemure

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