Re: [PATCH v4] cpufreq: schedutil: rate limits for SCHED_DEADLINE

2018-03-14 Thread Rafael J. Wysocki
On Wednesday, March 14, 2018 2:27:53 AM CET Joel Fernandes wrote: > On Tue, Mar 13, 2018 at 4:15 AM, Viresh Kumar wrote: > > On 13-03-18, 11:35, Claudio Scordino wrote: > >> When the SCHED_DEADLINE scheduling class increases the CPU utilization, > >> we should not wait for the rate limit, otherwis

Re: [PATCH v4] cpufreq: schedutil: rate limits for SCHED_DEADLINE

2018-03-13 Thread Joel Fernandes
On Tue, Mar 13, 2018 at 4:15 AM, Viresh Kumar wrote: > On 13-03-18, 11:35, 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 wit

Re: [PATCH v4] cpufreq: schedutil: rate limits for SCHED_DEADLINE

2018-03-13 Thread Viresh Kumar
On 13-03-18, 11:35, 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 with up to 10 SCHED_DEADLINE tasks have > shown reductions of e

[PATCH v4] cpufreq: schedutil: rate limits for SCHED_DEADLINE

2018-03-13 Thread Claudio Scordino
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