On Friday, February 9, 2018 9:02:34 AM CET Claudio Scordino wrote: > Hi Viresh, > > Il 09/02/2018 04:51, Viresh Kumar ha scritto: > > On 08-02-18, 18:01, Claudio Scordino wrote: > >> 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 have shown reductions of about 10% of > >> deadline > >> misses for tasks with low RT periods. > >> > >> The patch applies on top of the one recently proposed by Peter to drop the > >> SCHED_CPUFREQ_* flags. > >>
[cut] > > > > > Is it possible to (somehow) check here if the DL tasks will miss > > deadline if we continue to run at current frequency? And only ignore > > rate-limit if that is the case ? > > I need to think further about it. That would be my approach FWIW. Increasing the frequency beyond what is necessary means wasting energy in any case. Thanks, Rafael
