Dear Rafael, dear Viresh,
Il 28/02/2018 12:06, Claudio Scordino ha scritto:
When the SCHED_DEADLINE scheduling class increases the CPU utilization,
we should not wait for the rate limit, otherwise we may miss some
deadline.
Tests using rt-app on Exynos5422 with up to 10 SCHED_DEADLINE tasks have
shown reductions of even 10% of deadline misses with a negligible
increase of energy consumption (measured through Baylibre Cape).
As a follow up of the previous thread, I've put some figures here:
https://gist.github.com/claudioscordino/d4a10e8b3ceac419fb0c8b552db19806
In some cases, I've noticed the patch to even reduce the energy consumption
(due to a mix of factors plus DL tasks entering the inactive state sooner).
I've also tried to create the "ramp-up" scenario by allocating 10 DL tasks on
the same core, but it didn't produce any significant increase of consumption.
IMHO, the overall behavior looks better.
Best regards,
Claudio
