Re: [PATCH v2 4/4] sched/cpufreq_schedutil: use util_est for OPP selection

2017-12-18 Thread Patrick Bellasi
Hi Rafael, On 16-Dec 03:35, Rafael J. Wysocki wrote: > On Tuesday, December 5, 2017 6:10:18 PM CET Patrick Bellasi wrote: [...] > > diff --git a/kernel/sched/cpufreq_schedutil.c > > b/kernel/sched/cpufreq_schedutil.c > > index 2f52ec0f1539..465430d99440 100644 > > --- a/kernel/sched/cpufreq_sche

Re: [PATCH v2 4/4] sched/cpufreq_schedutil: use util_est for OPP selection

2017-12-15 Thread Rafael J. Wysocki
On Tuesday, December 5, 2017 6:10:18 PM CET Patrick Bellasi wrote: > When schedutil looks at the CPU utilization, the current PELT value for > that CPU is returned straight away. In certain scenarios this can have > undesired side effects and delays on frequency selection. > > For example, since t

[PATCH v2 4/4] sched/cpufreq_schedutil: use util_est for OPP selection

2017-12-05 Thread Patrick Bellasi
When schedutil looks at the CPU utilization, the current PELT value for that CPU is returned straight away. In certain scenarios this can have undesired side effects and delays on frequency selection. For example, since the task utilization is decayed at wakeup time, a long sleeping big task newly