linux-kernel - [PATCH 0/8] schedutil enhancements

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Message-Id: <1457932932-28444-1-git-send-email-mturquette+renesas@baylibre.com>
Date:	Sun, 13 Mar 2016 22:22:04 -0700
From:	Michael Turquette <mturquette@...libre.com>
To:	peterz@...radead.org, rjw@...ysocki.net
Cc:	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	Juri.Lelli@....com, steve.muckle@...aro.org,
	morten.rasmussen@....com, dietmar.eggemann@....com,
	vincent.guittot@...aro.org,
	Michael Turquette <mturquette+renesas@...libre.com>
Subject: [PATCH 0/8] schedutil enhancements

I'm happy that scheduler-driven cpu frequency selection is getting some
attention. Rafael's recent schedutil governor is a step in the right direction.
This series builds on top of Rafael's schedutil governor, bringing it to parity
with some of the features in the schedfreq series posted by Steve[0], as well
as adding a couple of new things.

Patch 1 removes cpufreq_trigger_update()

Patches 2-4 move the cfs capacity margin out of the governor and into
cfs. This value is made tunable by a sysfs control in schedutil.

Patches 5-6 make cpufreq_update_util() aware of multiple scheduler
classes (cfs, rt & dl), and add storage & summation of these per-class
utilization values into schedutil.

Patches 7-8 introduces Dietmar's generic cpufreq implementation[1] of the
frequency invariance hook and changes the preprocessor magic in sched.h to
favor the cpufreq implementation over arch- or platform-specific ones.

If accepted, this series makes it trivial to port Steve and Juri's fine-grained
frequency selection in cfs and Vincent's rt utilization patch to the schedutil
governor.[2-6]

[0] lkml.kernel.org/r/1456190570-4475-1-git-send-email-smuckle@...aro.org
[1] https://git.linaro.org/people/steve.muckle/kernel.git/commit/1b7e57f89f14f7600e75e6fde42bf22d72927b3d
[2] lkml.kernel.org/r/1456190570-4475-5-git-send-email-smuckle@...aro.org
[3] lkml.kernel.org/r/1456190570-4475-6-git-send-email-smuckle@...aro.org
[4] lkml.kernel.org/r/1456190570-4475-7-git-send-email-smuckle@...aro.org
[5] lkml.kernel.org/r/1456190570-4475-8-git-send-email-smuckle@...aro.org
[6] lkml.kernel.org/r/1456190570-4475-11-git-send-email-smuckle@...aro.org

Dietmar Eggemann (1):
  cpufreq: Frequency invariant scheduler load-tracking support

Michael Turquette (7):
  sched/cpufreq: remove cpufreq_trigger_update()
  sched/fair: add margin to utilization update
  sched/cpufreq: new cfs capacity margin helpers
  cpufreq/schedutil: sysfs capacity margin tunable
  sched/cpufreq: pass sched class into cpufreq_update_util
  cpufreq/schedutil: sum per-sched class utilization
  sched: prefer cpufreq_scale_freq_capacity

 drivers/cpufreq/cpufreq.c           | 29 ++++++++++++
 drivers/cpufreq/cpufreq_governor.c  |  5 +-
 drivers/cpufreq/cpufreq_schedutil.c | 70 ++++++++++++++++++++++++----
 drivers/cpufreq/intel_pstate.c      |  5 +-
 include/linux/cpufreq.h             |  3 ++
 include/linux/sched.h               | 19 ++++++--
 kernel/sched/cpufreq.c              | 92 +++++++++++++++++++++++++------------
 kernel/sched/deadline.c             |  2 +-
 kernel/sched/fair.c                 | 18 +++++++-
 kernel/sched/rt.c                   |  2 +-
 kernel/sched/sched.h                | 29 +++++++++---
 11 files changed, 219 insertions(+), 55 deletions(-)

-- 
2.1.4