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sched/walt: Improve the scheduler

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This change is for general scheduler improvement.

Change-Id: I9cd7715f390d52163b7280ebb6e9f04bdfc38d4c
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
Signed-off-by: Shaleen Agrawal <shalagra@codeaurora.org>
This commit is contained in:
Abhijeet Dharmapurikar 2021-09-22 11:19:38 -07:00 committed by Rishabh Bhatnagar
parent e2d43d820a
commit e611070ee2
1 changed files with 22 additions and 9 deletions
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31
kernel/sched/walt/walt_cfs.c
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@ -693,23 +693,36 @@ static inline int wake_to_idle(struct task_struct *p)
/* return true if cpu should be chosen over best_energy_cpu */
static inline bool select_cpu_same_energy(int cpu, int best_cpu, int prev_cpu)
{
bool new_cpu_is_idle = available_idle_cpu(cpu);
bool best_cpu_is_idle = available_idle_cpu(best_cpu);
if (capacity_orig_of(best_cpu) < capacity_orig_of(cpu))
return false;
if (capacity_orig_of(cpu) < capacity_orig_of(best_cpu))
return true;
if (best_cpu_is_idle && walt_get_idle_exit_latency(cpu_rq(best_cpu)) <= 1)
return false;
if (new_cpu_is_idle && walt_get_idle_exit_latency(cpu_rq(cpu)) <= 1)
return true;
if (best_cpu_is_idle && !new_cpu_is_idle)
return false;
if (new_cpu_is_idle && !best_cpu_is_idle)
return true;
if (best_cpu == prev_cpu)
return false;
if (cpu == prev_cpu)
return true;
if (available_idle_cpu(best_cpu) && walt_get_idle_exit_latency(cpu_rq(best_cpu)) <= 1)
return false; /* best_cpu is idle wfi or shallower */
if (best_cpu_is_idle && new_cpu_is_idle)
return false;
if (available_idle_cpu(cpu) && walt_get_idle_exit_latency(cpu_rq(cpu)) <= 1)
return true; /* new cpu is idle wfi or shallower */
if (cpu_util(best_cpu) <= cpu_util(cpu))
return false;
/*
* If we are this far this must be a tie between a busy and deep idle,
* pick the busy.
*/
return available_idle_cpu(best_cpu);
return true;
}
static inline unsigned int capacity_spare_of(int cpu)