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sched/walt: Improve the scheduler

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This change is for general scheduler improvement.

Change-Id: I30b3899e191d880e741f922323d0826b5c292498
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
This commit is contained in:
Pavankumar Kondeti 2020-12-08 20:19:40 +05:30
commit 5a24ce9de8
1 changed files with 15 additions and 4 deletions
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19
kernel/sched/fair.c
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@ -6573,16 +6573,25 @@ static void walt_find_best_target(struct sched_domain *sd, cpumask_t *cpus,
int prev_cpu = task_cpu(p);
int unisolated_candidate = -1;
int order_index = fbt_env->order_index, end_index = fbt_env->end_index;
int stop_index = INT_MAX;
int cluster;
unsigned int target_nr_rtg_high_prio = UINT_MAX;
bool rtg_high_prio_task = task_rtg_high_prio(p);
cpumask_t visit_cpus;
bool io_task_pack = (order_index > 0 && p->wts.iowaited);
/* Find start CPU based on boost value */
start_cpu = fbt_env->start_cpu;
if (fbt_env->strict_max || io_task_pack)
/*
* For higher capacity worth I/O tasks, stop the search
* at the end of higher capacity cluster(s).
*/
if (order_index > 0 && p->wts.iowaited) {
stop_index = num_sched_clusters - 2;
most_spare_wake_cap = LONG_MIN;
}
if (fbt_env->strict_max)
target_max_spare_cap = LONG_MIN;
if (p->state == TASK_RUNNING)
@ -6668,8 +6677,7 @@ static void walt_find_best_target(struct sched_domain *sd, cpumask_t *cpus,
* than the one required to boost the task.
*/
new_util = max(min_util, new_util);
if (!(fbt_env->strict_max || io_task_pack) &&
new_util > capacity_orig)
if (!fbt_env->strict_max && new_util > capacity_orig)
continue;
/*
@ -6760,6 +6768,9 @@ static void walt_find_best_target(struct sched_domain *sd, cpumask_t *cpus,
if ((cluster >= end_index) && (target_cpu != -1) &&
walt_target_ok(target_cpu, order_index))
break;
if (most_spare_cap_cpu != -1 && cluster >= stop_index)
break;
}
walt_adjust_cpus_for_packing(p, &target_cpu, &best_idle_cpu,