From: Morten Rasmussen <morten.rasmus...@arm.com>
This patch adds load_avg_ratio to each task. The load_avg_ratio is a
variant of load_avg_contrib which is not scaled by the task priority. It
is calculated like this:
runnable_avg_sum * NICE_0_LOAD / (runnable_avg_period + 1).
Signed-off-by: Morten Rasmussen <morten.rasmus...@arm.com>
---
include/linux/sched.h | 1 +
kernel/sched/fair.c | 3 +++
2 files changed, 4 insertions(+)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 4dc4990..81e4e82 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1151,6 +1151,7 @@ struct sched_avg {
u64 last_runnable_update;
s64 decay_count;
unsigned long load_avg_contrib;
+ unsigned long load_avg_ratio;
u32 usage_avg_sum;
};
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 095d86c..3e17dd5 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -1192,6 +1192,9 @@ static inline void __update_task_entity_contrib(struct
sched_entity *se)
contrib = se->avg.runnable_avg_sum * scale_load_down(se->load.weight);
contrib /= (se->avg.runnable_avg_period + 1);
se->avg.load_avg_contrib = scale_load(contrib);
+ contrib = se->avg.runnable_avg_sum * scale_load_down(NICE_0_LOAD);
+ contrib /= (se->avg.runnable_avg_period + 1);
+ se->avg.load_avg_ratio = scale_load(contrib);
}
/* Compute the current contribution to load_avg by se, return any delta */
--
1.7.9.5
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