linux-kernel - [PATCH v7 0/8] CPUs capacity information for heterogeneous systems

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Date:   Mon,  5 Sep 2016 15:22:44 +0100
From:   Juri Lelli <juri.lelli@....com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-pm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org, peterz@...radead.org,
        vincent.guittot@...aro.org, robh+dt@...nel.org,
        mark.rutland@....com, linux@....linux.org.uk, sudeep.holla@....com,
        lorenzo.pieralisi@....com, catalin.marinas@....com,
        will.deacon@....com, morten.rasmussen@....com,
        dietmar.eggemann@....com, juri.lelli@....com, broonie@...nel.org
Subject: [PATCH v7 0/8] CPUs capacity information for heterogeneous systems

Hi all,

version 7 of "CPUs capacity information for heterogeneous systems" patchset [1]
(please refer to previous postings to get some context).

A few changes from v6:

 - rebase on top of mainline (4.8-rc5)
 - some ACKs collected
 - changelogs fixes
 - use cpuinfo.max_freq
 - add delayed work to unregister notifier

Patches high level description:

 o 01/08 introduces documentation for the new optional DT binding
 o [02-06]/08 add cpu-capacity attribute to TC2, Juno and Juno r2 DTs and
   provide parsing of such information at boot time
 o [07-08]/08 introduce sysfs attribute

In case you would like to test this out, I pushed a branch here:

 git://linux-arm.org/linux-jl.git upstream/default_caps_v7

This branch contains additional patches, useful to better understand how CPU
capacity information is actually used by the scheduler.

These patches also form the basis for Morten/Dietmar's "Clean-ups and
asymmetric cpu capacity support" series [2] (and the EAS stack in general).

Best,

- Juri

[1] v1 - https://lkml.org/lkml/2015/11/23/391
    v2 - https://lkml.org/lkml/2016/1/8/417
    v3 - https://lkml.org/lkml/2016/2/3/405
    v4 - https://lkml.org/lkml/2016/3/18/350
    v5 - https://lkml.org/lkml/2016/6/15/291
    v6 - https://lkml.org/lkml/2016/7/19/419
[2] https://lkml.org/lkml/2016/8/31/292 


Juri Lelli (8):
  Documentation: arm: define DT cpu capacity-dmips-mhz bindings
  arm: parse cpu capacity-dmips-mhz from DT
  arm, dts: add TC2 cpu capacity-dmips-mhz information
  arm64: parse cpu capacity-dmips-mhz from DT
  arm64, dts: add Juno cpu capacity-dmips-mhz information
  arm64, dts: add Juno r2 cpu capacity-dmips-mhz information
  arm: add sysfs cpu_capacity attribute
  arm64: add sysfs cpu_capacity attribute

 .../devicetree/bindings/arm/cpu-capacity.txt       | 236 +++++++++++++++++++++
 Documentation/devicetree/bindings/arm/cpus.txt     |  10 +
 arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts         |   5 +
 arch/arm/kernel/topology.c                         | 228 +++++++++++++++++++-
 arch/arm64/boot/dts/arm/juno-r2.dts                |   6 +
 arch/arm64/boot/dts/arm/juno.dts                   |   6 +
 arch/arm64/kernel/topology.c                       | 232 +++++++++++++++++++-
 7 files changed, 721 insertions(+), 2 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/cpu-capacity.txt

-- 
2.7.0