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sched: walt: Account rt scale to cpu_capacity

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While updating cpu_rq->cpu_capacity, we are ignoring rt pressure, and
using same as cpu_capacity_orig, which might lead to unfair scheduler
decisions.

Fix it by accouting rt scale to cpu_capacity.

Change-Id: Icead0af0d8a309cc5f93438a4d4d7e7e7c93653c
Signed-off-by: Lingutla Chandrasekhar <clingutla@codeaurora.org>
This commit is contained in:
Lingutla Chandrasekhar 2021-08-24 14:00:06 +05:30 committed by Rishabh Bhatnagar
parent 7d1e74f709
commit 0e90c114dd
1 changed files with 2 additions and 1 deletions
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3
kernel/sched/walt/walt.c
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@ -3717,6 +3717,7 @@ static void android_rvh_update_cpu_capacity(void *unused, int cpu, unsigned long
unsigned long thermal_pressure = arch_scale_thermal_pressure(cpu);
unsigned long thermal_cap;
struct walt_sched_cluster *cluster;
unsigned long rt_pressure = max_capacity - *capacity;
if (unlikely(walt_disabled))
return;
@ -3736,7 +3737,7 @@ static void android_rvh_update_cpu_capacity(void *unused, int cpu, unsigned long
cluster->max_possible_freq);
cpu_rq(cpu)->cpu_capacity_orig = min(max_capacity, thermal_cap);
*capacity = cpu_rq(cpu)->cpu_capacity_orig;
*capacity = cpu_rq(cpu)->cpu_capacity_orig - rt_pressure;
}
static void android_rvh_sched_cpu_starting(void *unused, int cpu)