diff options
| author | Joonwoo Park <joonwoop@codeaurora.org> | 2016-12-08 16:12:12 -0800 |
|---|---|---|
| committer | Joonwoo Park <joonwoop@codeaurora.org> | 2017-09-01 17:20:59 -0700 |
| commit | ee4cebd75ed7b77132c39c0093923f9ff1bcafaa (patch) | |
| tree | fde67cb9845a167a6d30dc87ca10517ce46405f0 /kernel/sched/sched.h | |
| parent | 48f67ea85de468a9b3e47e723e7681cf7771dea6 (diff) | |
sched: EAS/WALT: use cr_avg instead of prev_runnable_sum
WALT accounts two major statistics; CPU load and cumulative tasks
demand.
The CPU load which is account of accumulated each CPU's absolute
execution time is for CPU frequency guidance. Whereas cumulative
tasks demand which is each CPU's instantaneous load to reflect
CPU's load at given time is for task placement decision.
Use cumulative tasks demand for cpu_util() for task placement and
introduce cpu_util_freq() for frequency guidance.
Change-Id: Id928f01dbc8cb2a617cdadc584c1f658022565c5
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
Diffstat (limited to 'kernel/sched/sched.h')
| -rw-r--r-- | kernel/sched/sched.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 029cf2bbeda2..73077f535e95 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -1592,7 +1592,7 @@ static inline unsigned long __cpu_util(int cpu, int delta) #ifdef CONFIG_SCHED_WALT if (!walt_disabled && sysctl_sched_use_walt_cpu_util) { - util = cpu_rq(cpu)->prev_runnable_sum << SCHED_LOAD_SHIFT; + util = cpu_rq(cpu)->cumulative_runnable_avg << SCHED_LOAD_SHIFT; do_div(util, walt_ravg_window); } #endif @@ -1608,6 +1608,20 @@ static inline unsigned long cpu_util(int cpu) return __cpu_util(cpu, 0); } +static inline unsigned long cpu_util_freq(int cpu) +{ + unsigned long util = cpu_rq(cpu)->cfs.avg.util_avg; + unsigned long capacity = capacity_orig_of(cpu); + +#ifdef CONFIG_SCHED_WALT + if (!walt_disabled && sysctl_sched_use_walt_cpu_util) { + util = cpu_rq(cpu)->prev_runnable_sum << SCHED_LOAD_SHIFT; + do_div(util, walt_ravg_window); + } +#endif + return (util >= capacity) ? capacity : util; +} + #endif #ifdef CONFIG_CPU_FREQ_GOV_SCHED |