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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
