From: Vincent Guittot <vincent.guittot@linaro.org>
To: mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com,
dietmar.eggemann@arm.com, rostedt@goodmis.org,
bsegall@google.com, mgorman@suse.de, fweisbec@gmail.com,
tglx@linutronix.de, bristot@redhat.com,
linux-kernel@vger.kernel.org, joel@joelfernandes.org
Cc: qais.yousef@arm.com, Vincent Guittot <vincent.guittot@linaro.org>
Subject: [PATCH 0/6] move update blocked load outside newidle_balance
Date: Fri, 5 Feb 2021 12:48:24 +0100 [thread overview]
Message-ID: <20210205114830.781-1-vincent.guittot@linaro.org> (raw)
Joel reported long preempt and irq off sequence in newidle_balance because
of a large number of cgroups in used and having to be updated. This
patchset moves the update outside newidle_imblance in order to enable
early abort during the updates in case of pending irq as an example.
Instead of kicking a normal ILB that will wakes up CPU which is already
idle, patch 5 triggers the update of statistics in the idle thread of
the CPU before selecting and entering an idle state.
Vincent Guittot (6):
sched/fair: remove update of blocked load from newidle_balance
sched/fair: remove unused parameter of update_nohz_stats
sched/fair: merge for each idle cpu loop of ILB
sched/fair: reorder newidle_balance pulled_task test
sched/fair: trigger the update of blocked load on newly idle cpu
sched/fair: reduce the window for duplicated update
include/linux/sched/nohz.h | 2 +
kernel/sched/fair.c | 100 +++++++++++--------------------------
kernel/sched/idle.c | 6 +++
3 files changed, 38 insertions(+), 70 deletions(-)
--
2.17.1
next reply other threads:[~2021-02-05 11:58 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-05 11:48 Vincent Guittot [this message]
2021-02-05 11:48 ` [PATCH 1/6] sched/fair: remove update of blocked load from newidle_balance Vincent Guittot
2021-02-09 13:09 ` Valentin Schneider
2021-02-09 13:20 ` Vincent Guittot
2021-02-09 13:44 ` Dietmar Eggemann
2021-02-05 11:48 ` [PATCH 2/6] sched/fair: remove unused parameter of update_nohz_stats Vincent Guittot
2021-02-09 13:45 ` Dietmar Eggemann
2021-02-09 17:38 ` Vincent Guittot
2021-02-05 11:48 ` [PATCH 3/6] sched/fair: merge for each idle cpu loop of ILB Vincent Guittot
2021-02-09 13:09 ` Valentin Schneider
2021-02-05 11:48 ` [PATCH 4/6] sched/fair: reorder newidle_balance pulled_task test Vincent Guittot
2021-02-09 13:46 ` Dietmar Eggemann
2021-02-05 11:48 ` [RFC PATCH 5/6] sched/fair: trigger the update of blocked load on newly idle cpu Vincent Guittot
2021-02-09 13:09 ` Valentin Schneider
2021-02-09 13:57 ` Vincent Guittot
2021-02-09 17:25 ` Valentin Schneider
2021-02-09 13:47 ` Dietmar Eggemann
2021-02-09 14:22 ` Vincent Guittot
2021-02-05 11:48 ` [PATCH 6/6] sched/fair: reduce the window for duplicated update Vincent Guittot
2021-02-05 16:13 ` [PATCH 6/6 v2] " Vincent Guittot
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