I've just copied the set_latency_target() of cyclcitest.c to my code
but I got the same behaviour.
Le jeu. 30 sept. 2021 à 15:23, Sebastian Andrzej Siewior
<bigeasy@xxxxxxxxxxxxx> a écrit :
>
> On 2021-09-30 09:13:25 [+0900], Punit Agrawal wrote:
> > With hackbench, the system is sufficiently busy to avoid the going into
> > idle.
>
> Not just that. cyclictest's usage of /dev/cpu_dma_latency has the side
> effect that it may disable some of the PM stuff in the system.
> So your system appears good but then when cyclictest is gone, the
> numbers go up.
>
> Maybe we should drop that so we observe a system without altering its
> behaviour?
>
> Sebastian
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