From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753800AbaETOLT (ORCPT ); Tue, 20 May 2014 10:11:19 -0400 Received: from service87.mimecast.com ([91.220.42.44]:36208 "EHLO service87.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752128AbaETOLS (ORCPT ); Tue, 20 May 2014 10:11:18 -0400 From: Javi Merino To: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Punit.Agrawal@arm.com, Javi Merino Subject: [RFC PATCH v2 0/7] The power allocator thermal governor Date: Tue, 20 May 2014 15:10:50 +0100 Message-Id: <1400595057-8585-1-git-send-email-javi.merino@arm.com> X-Mailer: git-send-email 1.7.9.5 X-OriginalArrivalTime: 20 May 2014 14:11:16.0599 (UTC) FILETIME=[5D648070:01CF7435] X-MC-Unique: 114052015111512201 Content-Type: text/plain; charset=WINDOWS-1252 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mail.home.local id s4KEBRUI012762 Hi linux-pm, This is v2 of the RFC we sent in [1]. The power allocator governor allocates device power to control temperature. This requires transforming performance requests into requested power, which we do with the aid of power models. Patch 5 (thermal: add a basic cpu power actor) implements a simple power model for cpus. The division of power between the actors ensures that power is allocated where it is needed the most, based on the current workload. [1] http://thread.gmane.org/gmane.linux.power-management.general/45000 Patches 1 and 2 are not proper parts of these series and can be merged separately. Patch 1 (tracing: Add __bitmask() macro to trace events to cpumasks and other bitmasks) is already in for-next. Patch 2 (thermal: document struct thermal_zone_device and thermal_governor) has already been submitted to linux-pm[2] and is generic. [2] http://article.gmane.org/gmane.linux.power-management.general/45434 Changes since v1: - Fixed finding cpufreq cooling devices in cpufreq_frequency_change() - Replaced the reworked cooling device interface with a separate power actor API - Addressed most of Eduardo's comments - Incorporated ftrace support for bitmask to trace cpumasks Todo: - Add static power to the cpu power model - Change the PI controller into a PID controller - Turn power actors into a device - Let platforms override the power allocator governor parameters - Add more tracing and provide scripts to evaluate the proposal. - Tune it to achieve the temperature stability we are aiming for Cheers, Javi & Punit Javi Merino (6): thermal: document struct thermal_zone_device and thermal_governor thermal: let governors have private data for each thermal zone thermal: introduce the Power Actor API thermal: add a basic cpu power actor thermal: introduce the Power Allocator governor thermal: add trace events to the power allocator governor Steven Rostedt (Red Hat) (1): tracing: Add __bitmask() macro to trace events to cpumasks and other bitmasks Documentation/thermal/power_actor.txt | 75 +++++ Documentation/thermal/power_allocator.txt | 42 +++ drivers/thermal/Kconfig | 23 ++ drivers/thermal/Makefile | 3 + drivers/thermal/power_actor/Kconfig | 9 + drivers/thermal/power_actor/Makefile | 7 + drivers/thermal/power_actor/cpu_actor.c | 424 +++++++++++++++++++++++++++ drivers/thermal/power_actor/power_actor.c | 66 +++++ drivers/thermal/power_actor/power_actor.h | 86 ++++++ drivers/thermal/power_allocator.c | 452 +++++++++++++++++++++++++++++ drivers/thermal/thermal_core.c | 90 +++++- drivers/thermal/thermal_core.h | 8 + include/linux/ftrace_event.h | 3 + include/linux/thermal.h | 58 +++- include/linux/trace_seq.h | 10 + include/trace/events/thermal.h | 38 +++ include/trace/events/thermal_governor.h | 35 +++ include/trace/ftrace.h | 57 +++- kernel/trace/trace_output.c | 41 +++ 19 files changed, 1515 insertions(+), 12 deletions(-) create mode 100644 Documentation/thermal/power_actor.txt create mode 100644 Documentation/thermal/power_allocator.txt create mode 100644 drivers/thermal/power_actor/Kconfig create mode 100644 drivers/thermal/power_actor/Makefile create mode 100644 drivers/thermal/power_actor/cpu_actor.c create mode 100644 drivers/thermal/power_actor/power_actor.c create mode 100644 drivers/thermal/power_actor/power_actor.h create mode 100644 drivers/thermal/power_allocator.c create mode 100644 include/trace/events/thermal.h create mode 100644 include/trace/events/thermal_governor.h -- 1.7.9.5