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sched: Improve the scheduler

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This change is for general scheduler improvemnts.

Change-Id: I8e6d7afe12387d86f3721c6fd880812ba86d885e
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Lingutla Chandrasekhar <clingutla@codeaurora.org>
This commit is contained in:
Pavankumar Kondeti 2020-10-09 12:02:18 +05:30 • committed by Lingutla Chandrasekhar
commit e3a0b52bb2
1 changed files with 17 additions and 2 deletions
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19
kernel/sched/rt.c
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@ -1830,6 +1830,7 @@ static int rt_energy_aware_wake_cpu(struct task_struct *task)
int best_cpu_idle_idx = INT_MAX;
int cpu_idle_idx = -1;
bool boost_on_big = rt_boost_on_big();
bool best_cpu_lt = true;
rcu_read_lock();
@ -1856,6 +1857,7 @@ retry:
}
for_each_cpu_and(cpu, lowest_mask, sched_group_span(sg)) {
bool lt;
trace_sched_cpu_util(cpu);
@ -1870,8 +1872,20 @@ retry:
util = cpu_util(cpu);
/* Find the least loaded CPU */
if (util > best_cpu_util)
lt = (walt_low_latency_task(cpu_rq(cpu)->curr) ||
walt_nr_rtg_high_prio(cpu));
/*
* When the best is suitable and the current is not,
* skip it
*/
if (lt && !best_cpu_lt)
continue;
/*
* Either both are sutilable or unsuitable, load takes
* precedence.
*/
if (!(best_cpu_lt ^ lt) && (util > best_cpu_util))
continue;
/*
@ -1905,6 +1919,7 @@ retry:
best_cpu_util = util;
best_cpu = cpu;
best_capacity = capacity_orig;
best_cpu_lt = lt;
}
} while (sg = sg->next, sg != sd->groups);