From: Rik van Riel <riel@surriel.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com, pjt@google.com,
dietmar.eggemann@arm.com, mingo@redhat.com,
morten.rasmussen@arm.com, tglx@linutronix.de,
mgorman@techsingularity.net, vincent.guittot@linaro.org
Subject: Re: [PATCH 03/14] sched,fair: redefine runnable_load_avg as the sum of task_h_load
Date: Mon, 29 Jul 2019 17:13:50 -0400 [thread overview]
Message-ID: <97675ac29db1339ff683bf7eacf97540b00bd2a1.camel@surriel.com> (raw)
In-Reply-To: <20190729200557.GR31398@hirez.programming.kicks-ass.net>
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On Mon, 2019-07-29 at 22:05 +0200, Peter Zijlstra wrote:
> On Mon, Jul 22, 2019 at 01:33:37PM -0400, Rik van Riel wrote:
> > @@ -3012,25 +2983,24 @@ static inline int
> > throttled_hierarchy(struct cfs_rq *cfs_rq);
> > static void update_cfs_group(struct sched_entity *se)
> > {
> > struct cfs_rq *gcfs_rq = group_cfs_rq(se);
> > - long shares, runnable;
> > + long shares;
> >
> > - if (!gcfs_rq)
> > + if (!gcfs_rq) {
> > + update_runnable_load_avg(se);
> > return;
> > + }
> >
> > if (throttled_hierarchy(gcfs_rq))
> > return;
> >
> > #ifndef CONFIG_SMP
> > - runnable = shares = READ_ONCE(gcfs_rq->tg->shares);
> > -
> > if (likely(se->load.weight == shares))
>
> I'm thinking this uses @shares uninitialized...
Oops indeed. Let me put the shares = assignment
back for the !SMP case, and edit that comment.
> > return;
> > #else
> > shares = calc_group_shares(gcfs_rq);
> > - runnable = calc_group_runnable(gcfs_rq, shares);
> > #endif
> >
> > - reweight_entity(cfs_rq_of(se), se, shares, runnable);
> > + reweight_entity(cfs_rq_of(se), se, shares);
> > }
--
All Rights Reversed.
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next prev parent reply other threads:[~2019-07-29 21:14 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-22 17:33 [PATCH RFC v3 0/14] sched,fair: flatten CPU controller runqueues Rik van Riel
2019-07-22 17:33 ` [PATCH 01/14] sched: introduce task_se_h_load helper Rik van Riel
2019-08-12 17:40 ` Dietmar Eggemann
2019-07-22 17:33 ` [PATCH 02/14] sched: change /proc/sched_debug fields Rik van Riel
2019-07-22 17:33 ` [PATCH 03/14] sched,fair: redefine runnable_load_avg as the sum of task_h_load Rik van Riel
2019-07-29 20:05 ` Peter Zijlstra
2019-07-29 21:13 ` Rik van Riel [this message]
2019-07-29 20:11 ` Peter Zijlstra
2019-07-29 20:26 ` Peter Zijlstra
2019-07-22 17:33 ` [PATCH 04/14] sched,fair: move runnable_load_avg to cfs_rq Rik van Riel
2019-07-30 8:55 ` Peter Zijlstra
2019-07-22 17:33 ` [PATCH 06/14] sched,cfs: use explicit cfs_rq of parent se helper Rik van Riel
2019-07-22 17:33 ` [PATCH 07/14] sched,cfs: fix zero length timeslice calculation Rik van Riel
2019-07-22 17:33 ` [PATCH 08/14] sched,fair: simplify timeslice length code Rik van Riel
2019-07-22 17:33 ` [PATCH 09/14] sched,fair: refactor enqueue/dequeue_entity Rik van Riel
2019-07-30 9:36 ` Peter Zijlstra
2019-07-30 12:58 ` Rik van Riel
2019-07-31 9:35 ` Peter Zijlstra
2019-07-31 15:03 ` Rik van Riel
2019-07-31 15:30 ` Peter Zijlstra
2019-07-22 17:33 ` [PATCH 10/14] sched,fair: add helper functions for flattened runqueue Rik van Riel
2019-07-22 17:33 ` [PATCH 11/14] sched,fair: flatten hierarchical runqueues Rik van Riel
2019-07-22 17:33 ` [PATCH 12/14] sched,fair: track cfs_rq->max_h_load for more legitimate h_weight Rik van Riel
2019-07-22 17:33 ` [PATCH 13/14] sched,fair: flatten update_curr functionality Rik van Riel
2019-07-22 17:33 ` [PATCH 14/14] sched,fair: propagate sum_exec_runtime up the hierarchy Rik van Riel
2019-07-30 16:29 ` [PATCH RFC v3 0/14] sched,fair: flatten CPU controller runqueues Peter Zijlstra
2019-07-30 18:27 ` Rik van Riel
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