[LITMUS^RT] CPU usage of real-time tasks

[Youcef Amine Benabbas]

Hi everyone,

Is there a way to precisely know the cpu usage of a real-time task. For
instance, rtspin (from liblitmus) receives as arguments a wcet and
period; however the utilization of an rtspin task measured by the "time"
command is different from wcet/period.

Since the time command will not run in the presence of real-time tasks,
I would like to know if there exists an alternative to precisely know
the cpu utilization of a real-time task (this may be needed if the
performance of a real-time scheduling algorithm  has to be conducted
based on the total utilization of a given task-set).

Kind regards,
Youcef