diff options
| author | Olav Haugan <ohaugan@codeaurora.org> | 2014-08-07 18:24:21 -0700 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-23 20:00:19 -0700 |
| commit | 8eede4a8d50a1d4e7203a4bbaa3209ddf346c985 (patch) | |
| tree | 89ab46834e4014d61a28f2d75efebc5e435563a4 /include | |
| parent | 778ce1a13c3f199fc44c53078fc2419075b9a0b8 (diff) | |
sched: Make RAVG_HIST_SIZE tunable
Make RAVG_HIST_SIZE available from /proc/sys/kernel/sched_ravg_hist_size
to allow tuning of the size of the history that is used in computation
of task demand.
CRs-fixed: 706138
Change-Id: Id54c1e4b6e974a62d787070a0af1b4e8ce3b4be6
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
[joonwoop@codeaurora.org: fixed minor conflict in sysctl.h]
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/sched.h | 9 | ||||
| -rw-r--r-- | include/linux/sched/sysctl.h | 4 | ||||
| -rw-r--r-- | include/trace/events/sched.h | 4 |
3 files changed, 11 insertions, 6 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 67b849a7df2c..f582c99d624f 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1253,7 +1253,7 @@ struct sched_statistics { }; #endif -#define RAVG_HIST_SIZE 5 +#define RAVG_HIST_SIZE_MAX 5 /* ravg represents frequency scaled cpu-demand of tasks */ struct ravg { @@ -1269,8 +1269,9 @@ struct ravg { * RAVG_HIST_SIZE windows. Windows where task was entirely sleeping are * ignored. * - * 'demand' represents maximum sum seen over previous RAVG_HIST_SIZE - * windows. 'demand' could drive frequency demand for tasks. + * 'demand' represents maximum sum seen over previous + * sysctl_sched_ravg_hist_size windows. 'demand' could drive frequency + * demand for tasks. * * 'prev_window' is the history in the most recent window. This value * may be zero if there was no task activity in that window - that is @@ -1282,7 +1283,7 @@ struct ravg { */ u64 mark_start; u32 sum, demand, prev_window, partial_demand, flags; - u32 sum_history[RAVG_HIST_SIZE]; + u32 sum_history[RAVG_HIST_SIZE_MAX]; }; struct sched_entity { diff --git a/include/linux/sched/sysctl.h b/include/linux/sched/sysctl.h index 47dd5253fd94..de111f548637 100644 --- a/include/linux/sched/sysctl.h +++ b/include/linux/sched/sysctl.h @@ -43,6 +43,7 @@ extern unsigned int sysctl_sched_wake_to_idle; extern unsigned int sysctl_sched_wakeup_load_threshold; extern unsigned int sysctl_sched_window_stats_policy; extern unsigned int sysctl_sched_account_wait_time; +extern unsigned int sysctl_sched_ravg_hist_size; #if defined(CONFIG_SCHED_FREQ_INPUT) || defined(CONFIG_SCHED_HMP) extern unsigned int sysctl_sched_init_task_load_pct; @@ -110,6 +111,9 @@ extern int sched_acct_wait_time_update_handler(struct ctl_table *table, extern int sched_window_stats_policy_update_handler(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos); +extern int sched_ravg_hist_size_update_handler(struct ctl_table *table, + int write, void __user *buffer, size_t *lenp, loff_t *ppos); + /* * control realtime throttling: * diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index d7d5cc5088f7..dc89c38010ae 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h @@ -286,7 +286,7 @@ TRACE_EVENT(sched_update_history, __field(enum task_event, evt ) __field(unsigned int, partial_demand ) __field(unsigned int, demand ) - __array( u32, hist, RAVG_HIST_SIZE ) + __array( u32, hist, RAVG_HIST_SIZE_MAX) __field(unsigned int, nr_big_tasks ) __field(unsigned int, nr_small_tasks ) __field( int, cpu ) @@ -303,7 +303,7 @@ TRACE_EVENT(sched_update_history, __entry->partial_demand = p->ravg.partial_demand; __entry->demand = p->ravg.demand; memcpy(__entry->hist, p->ravg.sum_history, - RAVG_HIST_SIZE*sizeof(u32)); + RAVG_HIST_SIZE_MAX * sizeof(u32)); #ifdef CONFIG_SCHED_HMP __entry->nr_big_tasks = rq->nr_big_tasks; __entry->nr_small_tasks = rq->nr_small_tasks; |