Re: Problems with cyclictest and ps

[Florian Boelstler <euphoria@arcor.de>]

Hi,

Phil K. wrote:
> I tried cyclictest under Debian Lenny with Kernel-2.6.23.8-hrt3 and
> Kernel-2.6.22 as user root. As decribed on the cyclictest-wikipage all
> cyclictest-tasks run with the scheduler class SCHED_FIFO. I controlled
> the scheduler class with "ps -ce" and ps showed me SCHED_OTHER for the
> cyclictest-task.

I had the same problem using 2.6.23.9-rt12 on Debian Etch
(schedutils-1.5.0-1) today. When checking the current state of
cyclictest with chrt (chrt -p <pid of cyclictest), it always reported
SCHED_OTHER and priority 0.
When I tried to change the scheduling policy and/or priority with chrt
it seemed to fail as well (not sure whether it tells the truth though).
On the other hand starting cyclictest via chrt did the trick:
"chrt -f 80 cyclictest..."

I can provide further details, when I am closer to the machine in
question tomorrow.

Cheers,

  Florian