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authorMorten Rasmussen <Morten.Rasmussen@arm.com>2012-09-14 14:38:16 +0100
committerViresh Kumar <viresh.kumar@linaro.org>2013-03-12 14:54:40 +0530
commite08f2c8fc885bcfbd476f5df53833e71c7eedaf5 (patch)
tree5917de5ff8299c8084f166c6fae92b742a85275b /kernel
parent34504af6e20c12ce4db26a26417a360e7e149888 (diff)
downloadvexpress-lsk-e08f2c8fc885bcfbd476f5df53833e71c7eedaf5.tar.gz
sched: Add HMP task migration ftrace event
Adds ftrace event for tracing task migrations using HMP optimized scheduling. Signed-off-by: Morten Rasmussen <Morten.Rasmussen@arm.com>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sched/fair.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index b9a659cee8c..fe661dbf729 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -3548,10 +3548,16 @@ unlock:
rcu_read_unlock();
#ifdef CONFIG_SCHED_HMP
- if (hmp_up_migration(prev_cpu, &p->se))
- return hmp_select_faster_cpu(p, prev_cpu);
- if (hmp_down_migration(prev_cpu, &p->se))
- return hmp_select_slower_cpu(p, prev_cpu);
+ if (hmp_up_migration(prev_cpu, &p->se)) {
+ new_cpu = hmp_select_faster_cpu(p, prev_cpu);
+ trace_sched_hmp_migrate(p, new_cpu, 0);
+ return new_cpu;
+ }
+ if (hmp_down_migration(prev_cpu, &p->se)) {
+ new_cpu = hmp_select_slower_cpu(p, prev_cpu);
+ trace_sched_hmp_migrate(p, new_cpu, 0);
+ return new_cpu;
+ }
/* Make sure that the task stays in its previous hmp domain */
if (!cpumask_test_cpu(new_cpu, &hmp_cpu_domain(prev_cpu)->cpus))
return prev_cpu;
@@ -6042,6 +6048,7 @@ static void hmp_force_up_migration(int this_cpu)
target->push_cpu = hmp_select_faster_cpu(p, cpu);
target->migrate_task = p;
force = 1;
+ trace_sched_hmp_migrate(p, target->push_cpu, 1);
}
}
raw_spin_unlock_irqrestore(&target->lock, flags);