From: Dietmar Eggemann <dietmar.eggemann@arm.com>
To: Ingo Molnar <mingo@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Juri Lelli <juri.lelli@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Steven Rostedt <rostedt@goodmis.org>
Cc: Daniel Bristot de Oliveira <bristot@redhat.com>,
Valentin Schneider <vschneid@redhat.com>,
Mel Gorman <mgorman@suse.de>, Ben Segall <bsegall@google.com>,
Luca Abeni <luca.abeni@santannapisa.it>,
linux-kernel@vger.kernel.org
Subject: [PATCH 0/3] DL capacity-aware fixes
Date: Wed, 29 Jun 2022 14:20:50 +0200 [thread overview]
Message-ID: <20220629122053.287165-1-dietmar.eggemann@arm.com> (raw)
While testing cpusets on asymmetric CPU capacity systems I realized that
the admission control, which kicks in when the cpumask of a cpuset is
about to be changed, is not capacity-aware. [PATCH 2/3] addresses this
issue.
Overview:
[PATCH 1/3] - Not part of the DL related changes but here for
convenience : Inline helper function around
static_branch_unlikely(&sched_asym_cpucapacity)
[PATCH 2/3] - Make dl_cpuset_cpumask_can_shrink() capacity-aware.
[PATCH 3/3] - Save a multiplication in dl_task_fits_capacity() by using
already maintained dl_density.
Dietmar Eggemann (3):
sched: Introduce sched_asym_cpucap_active()
sched/deadline: Make dl_cpuset_cpumask_can_shrink() capacity-aware
sched/deadline: Use sched_dl_entity's dl_density in
dl_task_fits_capacity()
kernel/sched/cpudeadline.c | 2 +-
kernel/sched/deadline.c | 28 +++++++++++++---------------
kernel/sched/fair.c | 8 ++++----
kernel/sched/rt.c | 4 ++--
kernel/sched/sched.h | 13 +++++++++----
5 files changed, 29 insertions(+), 26 deletions(-)
--
2.25.1
next reply other threads:[~2022-06-29 12:21 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-29 12:20 Dietmar Eggemann [this message]
2022-06-29 12:20 ` [PATCH 1/3] sched: Introduce sched_asym_cpucap_active() Dietmar Eggemann
2022-06-29 12:20 ` [PATCH 2/3] sched/deadline: Make dl_cpuset_cpumask_can_shrink() capacity-aware Dietmar Eggemann
2022-06-29 12:20 ` [PATCH 3/3] sched/deadline: Use sched_dl_entity's dl_density in dl_task_fits_capacity() Dietmar Eggemann
2022-07-06 10:47 ` Vincent Guittot
2022-07-08 12:34 ` Dietmar Eggemann
2022-07-08 13:36 ` [PATCH 0/3] DL capacity-aware fixes Juri Lelli
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