diff options
| author | bsegall@google.com <bsegall@google.com> | 2019-06-06 20:21:01 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-06-17 13:16:01 +0300 |
| commit | 66567fcbaecac455caa1b13643155d686b51ce63 (patch) | |
| tree | 8abd2701725d26e700bbd1c00dee312a3158769a /kernel/sched/sched.h | |
| parent | aacedf26fb7601222f2452cf0a54cab4fee160c5 (diff) | |
| download | linux-66567fcbaecac455caa1b13643155d686b51ce63.tar.xz | |
sched/fair: Don't push cfs_bandwith slack timers forward
When a cfs_rq sleeps and returns its quota, we delay for 5ms before
waking any throttled cfs_rqs to coalesce with other cfs_rqs going to
sleep, as this has to be done outside of the rq lock we hold.
The current code waits for 5ms without any sleeps, instead of waiting
for 5ms from the first sleep, which can delay the unthrottle more than
we want. Switch this around so that we can't push this forward forever.
This requires an extra flag rather than using hrtimer_active, since we
need to start a new timer if the current one is in the process of
finishing.
Signed-off-by: Ben Segall <bsegall@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Xunlei Pang <xlpang@linux.alibaba.com>
Acked-by: Phil Auld <pauld@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/xm26a7euy6iq.fsf_-_@bsegall-linux.svl.corp.google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/sched.h')
| -rw-r--r-- | kernel/sched/sched.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 607859a18b2a..b08dee29ef5e 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -338,8 +338,10 @@ struct cfs_bandwidth { u64 runtime_expires; int expires_seq; - short idle; - short period_active; + u8 idle; + u8 period_active; + u8 distribute_running; + u8 slack_started; struct hrtimer period_timer; struct hrtimer slack_timer; struct list_head throttled_cfs_rq; @@ -348,8 +350,6 @@ struct cfs_bandwidth { int nr_periods; int nr_throttled; u64 throttled_time; - - bool distribute_running; #endif }; |