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From: Lukasz Luba <lukasz.luba@arm.com>
To: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org
Cc: daniel.lezcano@linaro.org, amitk@kernel.org, rui.zhang@intel.com,
	lukasz.luba@arm.com, viresh.kumar@linaro.org, rafael@kernel.org,
	dietmar.eggemann@arm.com, nm@ti.com, sboyd@kernel.org,
	sudeep.holla@arm.com, cristian.marussi@arm.com,
	matthias.bgg@gmail.com, linux-mediatek@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 0/4] Energy Model power in micro-Watts and SCMI v3.1 alignment
Date: Thu,  7 Jul 2022 08:15:51 +0100	[thread overview]
Message-ID: <20220707071555.10085-1-lukasz.luba@arm.com> (raw)

Hi all,

This is a patch set which changes Energy Model power values scale to
micro-Watts. It also upgrades the SCMI performance layer + scmi-cpufreq
driver to leverage the SCMI v3.1 spec and process micro-Watts power values
coming from FW. The higher precision in EM power field solves an issue
of a rounding error, which then can be misinterpreted as 'inefficient OPP'.
An example rounding issue calculation is present in patch 1/4 description.

Changes:
v2
- simplified 32bit checks for max number of CPUs preventing energy
  estimation overflow
- added Reviewed-by and ACKs
v1 [1]

Regards,
Lukasz Luba

[1] https://lore.kernel.org/lkml/20220622145802.13032-1-lukasz.luba@arm.com/

Lukasz Luba (4):
  PM: EM: convert power field to micro-Watts precision and align drivers
  Documentation: EM: Switch to micro-Watts scale
  firmware: arm_scmi: Get detailed power scale from perf
  cpufreq: scmi: Support the power scale in micro-Watts in SCMI v3.1

 Documentation/power/energy-model.rst  | 14 +++----
 drivers/cpufreq/mediatek-cpufreq-hw.c |  7 ++--
 drivers/cpufreq/scmi-cpufreq.c        | 15 +++++++-
 drivers/firmware/arm_scmi/perf.c      | 18 +++++----
 drivers/opp/of.c                      | 15 ++++----
 drivers/powercap/dtpm_cpu.c           |  5 +--
 drivers/thermal/cpufreq_cooling.c     | 13 ++++++-
 drivers/thermal/devfreq_cooling.c     | 19 ++++++++--
 include/linux/energy_model.h          | 54 +++++++++++++++++++--------
 include/linux/scmi_protocol.h         |  8 +++-
 kernel/power/energy_model.c           | 24 ++++++++----
 11 files changed, 132 insertions(+), 60 deletions(-)

-- 
2.17.1


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             reply	other threads:[~2022-07-07  7:17 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-07  7:15 Lukasz Luba [this message]
2022-07-07  7:15 ` [PATCH v2 1/4] PM: EM: convert power field to micro-Watts precision and align drivers Lukasz Luba
2022-07-07  8:31   ` Daniel Lezcano
2022-07-07 10:44     ` Lukasz Luba
2022-07-07 10:53   ` Viresh Kumar
2022-07-07 10:53     ` Lukasz Luba
2022-07-07  7:15 ` [PATCH v2 2/4] Documentation: EM: Switch to micro-Watts scale Lukasz Luba
2022-07-07  7:15 ` [PATCH v2 3/4] firmware: arm_scmi: Get detailed power scale from perf Lukasz Luba
2022-07-07  7:15 ` [PATCH v2 4/4] cpufreq: scmi: Support the power scale in micro-Watts in SCMI v3.1 Lukasz Luba
2022-07-07 10:52   ` Viresh Kumar
2022-07-07 10:46 ` [PATCH v2 0/4] Energy Model power in micro-Watts and SCMI v3.1 alignment Lukasz Luba
2022-07-15  8:56   ` Lukasz Luba
2022-07-15 17:18     ` Rafael J. Wysocki

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