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sched/walt: Improve the scheduler

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This change is for general scheduler improvement.

Change-Id: Ieca864be1e26e39c56fd0be6be135d4085e5d8aa
Signed-off-by: Sai Harshini Nimmala <snimmala@codeaurora.org>
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
This commit is contained in:
Sai Harshini Nimmala 2021-04-08 00:47:13 -07:00 committed by Rishabh Bhatnagar
parent edad9aa298
commit d5046c9052
1 changed files with 18 additions and 0 deletions
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18
kernel/sched/walt/walt_cfs.c
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@ -213,6 +213,17 @@ enum fastpaths {
PREV_CPU_FASTPATH,
};
static inline bool is_complex_sibling_idle(int cpu)
{
if (is_min_capacity_cpu(cpu)) {
if (cpu % 2)
return available_idle_cpu(cpu - 1);
return available_idle_cpu(cpu + 1);
}
return false;
}
static void walt_find_best_target(struct sched_domain *sd,
cpumask_t *candidates,
struct task_struct *p,
@ -266,6 +277,8 @@ static void walt_find_best_target(struct sched_domain *sd,
for (cluster = 0; cluster < num_sched_clusters; cluster++) {
int best_idle_cpu_cluster = -1;
int target_cpu_cluster = -1;
int this_complex_idle = 0;
int best_complex_idle = 0;
target_max_spare_cap = 0;
min_exit_latency = INT_MAX;
@ -349,6 +362,10 @@ static void walt_find_best_target(struct sched_domain *sd,
if (available_idle_cpu(i)) {
idle_exit_latency = walt_get_idle_exit_latency(cpu_rq(i));
this_complex_idle = is_complex_sibling_idle(i) ? 1 : 0;
if (this_complex_idle < best_complex_idle)
continue;
/*
* Prefer shallowest over deeper idle state cpu,
* of same capacity cpus.
@ -366,6 +383,7 @@ static void walt_find_best_target(struct sched_domain *sd,
min_exit_latency = idle_exit_latency;
best_idle_cuml_util = new_util_cuml;
best_idle_cpu_cluster = i;
best_complex_idle = this_complex_idle;
continue;
}