Messages in this thread | | | Subject | Re: [PATCH -v2 13/18] sched/fair: Propagate an effective runnable_load_avg | From | Dietmar Eggemann <> | Date | Tue, 3 Oct 2017 10:29:26 +0100 |
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On 03/10/17 09:50, Peter Zijlstra wrote: > On Mon, Oct 02, 2017 at 06:46:32PM +0100, Dietmar Eggemann wrote: > >>> +/* >>> + * Recomputes the group entity based on the current state of its group >>> + * runqueue. >>> + */ >>> +static void update_cfs_group(struct sched_entity *se) >> >> update_cfs_share(s)() is still mentioned in the function header of >> update_tg_load_avg() and update_cfs_rq_load_avg(). >> >> Should we rename those comments with this patch? >> >> IMHO, the comment for update_tg_load_avg() is still true whereas the one >> for update_cfs_rq_load_avg() mentions cfs_rq->avg as >> cfs_rq->avg.load_avg (or cfs_rq_load_avg()) and update_cfs_group() >> doesn't use it anymore. It's now used in calc_group_runnable() and >> calc_group_shares() instead. >> >> [...] > > Right, so something like the below? Thinking that update_cfs_group() > immediately leads to calc_group_*() so no need to spell those out.
Looks good to me, agreed.
> > > diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c > index 350dbec01523..fee2e34812da 100644 > --- a/kernel/sched/fair.c > +++ b/kernel/sched/fair.c > @@ -3333,7 +3333,7 @@ __update_load_avg_cfs_rq(u64 now, int cpu, struct cfs_rq *cfs_rq) > * differential update where we store the last value we propagated. This in > * turn allows skipping updates if the differential is 'small'. > * > - * Updating tg's load_avg is necessary before update_cfs_share(). > + * Updating tg's load_avg is necessary before update_cfs_group(). > */ > static inline void update_tg_load_avg(struct cfs_rq *cfs_rq, int force) > { > @@ -3601,7 +3601,7 @@ static inline void add_tg_cfs_propagate(struct cfs_rq *cfs_rq, long runnable_sum > * avg. The immediate corollary is that all (fair) tasks must be attached, see > * post_init_entity_util_avg(). > * > - * cfs_rq->avg is used for task_h_load() and update_cfs_share() for example. > + * cfs_rq->avg is used for task_h_load() and update_cfs_group() for example. > * > * Returns true if the load decayed or we removed load. > * >
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