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hperf_hmp: add sched domains initialization.

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has two pointers to A15 and A7 scheduling groups(struct sched_group).

Signed-off-by: Tarek Dakhran <t.dakhran <at> samsung.com>
Signed-off-by: Sergey Dyasly <s.dyasly <at> samsung.com>
Signed-off-by: Dmitriy Safonov <d.safonov <at> partner.samsung.com>
Signed-off-by: Arseniy Krasnov <a.krasnov <at> samsung.com>
Signed-off-by: Ilya Maximets <i.maximets <at> samsung.com>
Signed-off-by: memeka <mihailescu2m@gmail.com>
This commit is contained in:
Arseniy Krasnov
2015-11-06 12:02:37 +00:00
committed by Mauro (mdrjr) Ribeiro
parent b8ac462153
commit 29894de8f1
2 changed files with 53 additions and 0 deletions
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4
include/linux/sched.h
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@@ -1111,6 +1111,10 @@ struct sched_domain {
u64 avg_scan_cost; /* select_idle_sibling */
#ifdef CONFIG_HPERF_HMP
struct sched_group *a15_group;
struct sched_group *a7_group;
#endif
#ifdef CONFIG_SCHEDSTATS
/* load_balance() stats */
unsigned int lb_count[CPU_MAX_IDLE_TYPES];

49
kernel/sched/core.c
View File

@@ -91,6 +91,16 @@
#define CREATE_TRACE_POINTS
#include <trace/events/sched.h>
#ifdef CONFIG_HPERF_HMP
/* cpumask for A15 cpus */
static DECLARE_BITMAP(cpu_fastest_bits, CONFIG_NR_CPUS);
struct cpumask *cpu_fastest_mask = to_cpumask(cpu_fastest_bits);
/* cpumask for A7 cpus */
static DECLARE_BITMAP(cpu_slowest_bits, CONFIG_NR_CPUS);
struct cpumask *cpu_slowest_mask = to_cpumask(cpu_slowest_bits);
#endif
DEFINE_MUTEX(sched_domains_mutex);
DEFINE_PER_CPU_SHARED_ALIGNED(struct rq, runqueues);
@@ -7064,6 +7074,45 @@ static int build_sched_domains(const struct cpumask *cpu_map,
cpu_attach_domain(sd, d.rd, i);
}
#ifdef CONFIG_HPERF_HMP
for (i = nr_cpumask_bits - 1; i >= 0; i--) {
if (!cpumask_test_cpu(i, cpu_map))
continue;
for (sd = *per_cpu_ptr(d.sd, i); sd; sd = sd->parent) {
struct sched_group *sg;
sd->a7_group = NULL;
sd->a15_group = NULL;
/* Process only HMP domains */
if (!(sd->flags & SD_HMP_BALANCE))
continue;
/*
* Process sched groups of this domain.
* Attach sg to hmp domains.
*/
sg = sd->groups;
do {
if (!sg->sgc)
goto next_sg;
#ifdef CONFIG_SCHED_DEBUG
printk(KERN_EMERG "Attaching CPUs 0x%08lX to domain %s\n",
sched_group_cpus(sg)->bits[0], sd->name);
#endif
if (cpumask_intersects(sched_group_cpus(sg),
cpu_fastest_mask))
sd->a15_group = sg;
else
sd->a7_group = sg;
next_sg:
sg = sg->next;
} while (sg != sd->groups);
}
}
#endif /* CONFIG_HPERF_HMP */
rcu_read_unlock();
if (rq && sched_debug_enabled) {