diff options
| author | Joel Fernandes <joelaf@google.com> | 2017-09-11 17:10:37 -0700 |
|---|---|---|
| committer | Joel Fernandes <joelaf@google.com> | 2018-02-01 11:19:48 -0800 |
| commit | a81d32264721fcb29e54d981fe17519cef600d78 (patch) | |
| tree | fe5cef4df8d34572f68ede0d7ad73c4fead84cae /kernel/sched/core.c | |
| parent | fe09418d6f88b55920c576166b6e6a5ad456920f (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
Note:
Fixed build breakage due to schedfreq dependency which isn't used
for RT anymore.
Bug: 30210506
Change-Id: I428a2695cac06cc3458cdde0dea72315e4e66c00
Signed-off-by: Joel Fernandes <joelaf@google.com>
Diffstat (limited to 'kernel/sched/core.c')
| -rw-r--r-- | kernel/sched/core.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index fcb7887dacea..6c9213a6fa9f 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2200,6 +2200,7 @@ static void __sched_fork(unsigned long clone_flags, struct task_struct *p) init_dl_task_timer(&p->dl); __dl_clear_params(p); + init_rt_schedtune_timer(&p->rt); INIT_LIST_HEAD(&p->rt.run_list); #ifdef CONFIG_PREEMPT_NOTIFIERS |