diff options
| author | Peter Zijlstra | 2017-05-06 15:59:54 +0200 |
|---|---|---|
| committer | Ingo Molnar | 2017-09-29 19:35:15 +0200 |
| commit | 1ea6c46a23f1213d1972bfae220db5c165e27bba (patch) | |
| tree | 434a578058f52ae1f26b22b7f61183d0ba6131b2 /kernel/sched/sched.h | |
| parent | 0e2d2aaaae52c247c047d14999b93486bdbd3431 (diff) | |
sched/fair: Propagate an effective runnable_load_avg
The load balancer uses runnable_load_avg as load indicator. For
!cgroup this is:
runnable_load_avg = \Sum se->avg.load_avg ; where se->on_rq
That is, a direct sum of all runnable tasks on that runqueue. As
opposed to load_avg, which is a sum of all tasks on the runqueue,
which includes a blocked component.
However, in the cgroup case, this comes apart since the group entities
are always runnable, even if most of their constituent entities are
blocked.
Therefore introduce a runnable_weight which for task entities is the
same as the regular weight, but for group entities is a fraction of
the entity weight and represents the runnable part of the group
runqueue.
Then propagate this load through the PELT hierarchy to arrive at an
effective runnable load avgerage -- which we should not confuse with
the canonical runnable load average.
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/sched.h')
| -rw-r--r-- | kernel/sched/sched.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 5bcb86eb026b..e83d1b8be611 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -418,6 +418,7 @@ struct cfs_bandwidth { }; /* CFS-related fields in a runqueue */ struct cfs_rq { struct load_weight load; + unsigned long runnable_weight; unsigned int nr_running, h_nr_running; u64 exec_clock; @@ -443,8 +444,6 @@ struct cfs_rq { * CFS load tracking */ struct sched_avg avg; - u64 runnable_load_sum; - unsigned long runnable_load_avg; #ifndef CONFIG_64BIT u64 load_last_update_time_copy; #endif |