diff options
| author | Srivatsa Vaddagiri <vatsa@codeaurora.org> | 2014-09-01 13:26:53 +0530 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-23 20:00:50 -0700 |
| commit | 3a67b4ce87bf96312d4c5728047d830a66258854 (patch) | |
| tree | bd392503fe5c0f2da5231f1865cc86fd8b7b0672 /include/linux/sched | |
| parent | 977dc392f77522559697cbedfb2d48ad7be96aec (diff) | |
sched: window-stats: Enhance cpu busy time accounting
rq->curr/prev_runnable_sum counters represent cpu demand from various
tasks that have run on a cpu. Any task that runs on a cpu will have a
representation in rq->curr_runnable_sum. Their partial_demand value
will be included in rq->curr_runnable_sum. Since partial_demand is
derived from historical load samples for a task, rq->curr_runnable_sum
could represent "inflated/un-realistic" cpu usage. As an example, lets
say that task with partial_demand of 10ms runs for only 1ms on a cpu.
What is included in rq->curr_runnable_sum is 10ms (and not the actual
execution time of 1ms). This leads to cpu busy time being reported on
the upside causing frequency to stay higher than necessary.
This patch fixes cpu busy accounting scheme to strictly represent
actual usage. It also provides for conditional fixup of busy time upon
migration and upon heavy-task wakeup.
CRs-Fixed: 691443
Change-Id: Ic4092627668053934049af4dfef65d9b6b901e6b
Signed-off-by: Srivatsa Vaddagiri <vatsa@codeaurora.org>
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
[joonwoop@codeaurora.org: fixed conflict in init_task_load(),
se.avg.decay_count has deprecated.]
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
Diffstat (limited to 'include/linux/sched')
| -rw-r--r-- | include/linux/sched/sysctl.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/sched/sysctl.h b/include/linux/sched/sysctl.h index 411812931a26..a87dec5a4e10 100644 --- a/include/linux/sched/sysctl.h +++ b/include/linux/sched/sysctl.h @@ -44,8 +44,10 @@ 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; -extern unsigned int sysctl_sched_freq_legacy_mode; extern unsigned int sysctl_sched_gov_response_time; +extern unsigned int sysctl_sched_freq_account_wait_time; +extern unsigned int sysctl_sched_migration_fixup; +extern unsigned int sysctl_sched_heavy_task_pct; #if defined(CONFIG_SCHED_FREQ_INPUT) || defined(CONFIG_SCHED_HMP) extern unsigned int sysctl_sched_init_task_load_pct; |