Messages in this thread | | | From | Lukasz Luba <> | 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 |
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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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