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sched/walt: Improve the scheduler

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This change is for general scheduler improvement.

Change-Id: I616acbe5bfdb0e1bf88e923d98b4a3d54d26d942
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
This commit is contained in:
Pavankumar Kondeti 2020-12-08 14:29:21 +05:30
commit dfd45fa093
3 changed files with 6 additions and 2 deletions
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1
include/linux/sched.h
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@ -626,6 +626,7 @@ struct walt_task_struct {
struct list_head grp_list;
u64 cpu_cycles;
cpumask_t cpus_requested;
bool iowaited;
};
#else

1
kernel/sched/core.c
View file

@ -2828,6 +2828,7 @@ static void __sched_fork(unsigned long clone_flags, struct task_struct *p)
p->wts.boost_expires = 0;
p->wts.boost_period = 0;
p->wts.low_latency = 0;
p->wts.iowaited = false;
#endif
INIT_LIST_HEAD(&p->se.group_node);

6
kernel/sched/fair.c
View file

@ -6577,7 +6577,7 @@ static void walt_find_best_target(struct sched_domain *sd, cpumask_t *cpus,
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->in_iowait);
bool io_task_pack = (order_index > 0 && p->wts.iowaited);
/* Find start CPU based on boost value */
start_cpu = fbt_env->start_cpu;
@ -8153,9 +8153,11 @@ int can_migrate_task(struct task_struct *p, struct lb_env *env)
if (!can_migrate_boosted_task(p, env->src_cpu, env->dst_cpu))
return 0;
if (p->in_iowait && is_min_capacity_cpu(env->dst_cpu) &&
#ifdef CONFIG_SCHED_WALT
if (p->wts.iowaited && is_min_capacity_cpu(env->dst_cpu) &&
!is_min_capacity_cpu(env->src_cpu))
return 0;
#endif
if (!cpumask_test_cpu(env->dst_cpu, p->cpus_ptr)) {
int cpu;