diff options
| author | Joel Fernandes <joelaf@google.com> | 2017-09-11 17:10:37 -0700 |
|---|---|---|
| committer | Todd Kjos <tkjos@google.com> | 2017-11-07 23:47:42 +0000 |
| commit | d194ba5d712f051ff6c025f3484bb72f219764e3 (patch) | |
| tree | 39ac44cd00a5c8afc64aaa5ff58b3e926558b8e9 /include/linux/sched.h | |
| parent | cd04e987d1da0eadc25c2186bd6bd93f22c3e851 (diff) | |
ANDROID: sched/rt: schedtune: Add boost retention to RT
Boosted RT tasks can be deboosted quickly, this makes boost usless
for RT tasks and causes lots of glitching. Use timers to prevent
de-boost too soon and wait for long enough such that next enqueue
happens after a threshold.
While this can be solved in the governor, there are following
advantages:
- The approach used is governor-independent
- Reduces boost group lock contention for frequently sleepers/wakers
- Works with schedfreq without any other schedfreq hacks.
Bug: 30210506
Change-Id: I41788b235586988be446505deb7c0529758a9898
Signed-off-by: Joel Fernandes <joelaf@google.com>
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 60af9d2fa922..6197d9c8e5a0 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1433,6 +1433,10 @@ struct sched_rt_entity { unsigned long watchdog_stamp; unsigned int time_slice; + /* Accesses for these must be guarded by rq->lock of the task's rq */ + bool schedtune_enqueued; + struct hrtimer schedtune_timer; + struct sched_rt_entity *back; #ifdef CONFIG_RT_GROUP_SCHED struct sched_rt_entity *parent; |