diff options
| author | Steve Muckle <smuckle@codeaurora.org> | 2014-05-06 18:05:50 -0700 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-23 19:59:29 -0700 |
| commit | f469bce8e2d2062568f753ca7e9099715f504df8 (patch) | |
| tree | 821999bd5edcf830dae9ab4094a04e8bc7c3fb5a /include/linux | |
| parent | e640249dbade56af7bc968fce2f5ede230602e6e (diff) | |
sched: add migration load change notifier for frequency guidance
When a task moves between CPUs in two different frequency domains
the cpufreq governor may wish to immediately modify the frequency
of both the source and destination CPUs of the migrating task.
A tunable is provided to establish what size task is considered
"significant" enough to warrant notifying cpufreq.
Also fix a bug that would cause load to not be accounted properly
during wakeup migrations.
Change-Id: Ie8f6b1cc4d43a602840dac18590b42a81327c95a
Signed-off-by: Steve Muckle <smuckle@codeaurora.org>
[rameezmustafa@codeaurora.org: Add double rq locking for set_task_cpu()]
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/sched.h | 2 | ||||
| -rw-r--r-- | include/linux/sched/sysctl.h | 5 |
2 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 763eb0312130..2d2a94575eaa 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -3171,6 +3171,8 @@ struct migration_notify_data { int load; }; +extern struct atomic_notifier_head load_alert_notifier_head; + extern long sched_setaffinity(pid_t pid, const struct cpumask *new_mask); extern long sched_getaffinity(pid_t pid, struct cpumask *mask); diff --git a/include/linux/sched/sysctl.h b/include/linux/sched/sysctl.h index 66a978ca7a65..b65ee06f80c9 100644 --- a/include/linux/sched/sysctl.h +++ b/include/linux/sched/sysctl.h @@ -47,6 +47,8 @@ extern unsigned int sysctl_sched_window_stats_policy; extern unsigned int sysctl_sched_init_task_load_pct; #endif +extern unsigned int sysctl_sched_task_migrate_notify_pct; + #ifdef CONFIG_SCHED_HMP extern unsigned int sysctl_sched_enable_hmp_task_placement; extern unsigned int sysctl_sched_mostly_idle_nr_run; @@ -87,6 +89,9 @@ int sched_proc_update_handler(struct ctl_table *table, int write, loff_t *ppos); #endif +extern int sched_migrate_notify_proc_handler(struct ctl_table *table, + int write, void __user *buffer, size_t *lenp, loff_t *ppos); + extern int sched_hmp_proc_update_handler(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos); |