Attaching CPU clusters as 'sched_group' to HMP domains. Each HMP domain
has two pointers to A15 and A7 scheduling groups(struct sched_group).
Signed-off-by: Tarek Dakhran <t.dakh...@samsung.com>
Signed-off-by: Sergey Dyasly <s.dya...@samsung.com>
Signed-off-by: Dmitriy Safonov <d.safo...@partner.samsung.com>
Signed-off-by: Arseniy Krasnov <a.kras...@samsung.com>
Signed-off-by: Ilya Maximets <i.maxim...@samsung.com>
---
include/linux/sched.h | 4 ++++
kernel/sched/core.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 53 insertions(+)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index eb084df..aa72125 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1057,6 +1057,10 @@ struct sched_domain {
u64 max_newidle_lb_cost;
unsigned long next_decay_max_lb_cost;
+#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];
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 16092e0..e3a632f 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -90,6 +90,16 @@
#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);
@@ -6971,6 +6981,45 @@ static int build_sched_domains(const struct cpumask
*cpu_map,
sd = *per_cpu_ptr(d.sd, i);
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();
ret = 0;
--
1.9.1
--
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