On 4 July 2012 16:09, Amit Kucheria <amit.kucheria@linaro.org> wrote:

Hi all,

Git Location: http://git.linaro.org/gitweb?p=arm/big.LITTLE/mp.git;a=summary
Branch: big-LITTLE-MP-v1

We're announcing a kernel tree to track the various topics of the
big.LITTLE MP project. The aim of this tree is to help consolidate the
various topic patchsets that improve the behaviour of Linux on
asymmetric cores (e.g. big.LITTLE) and make smarter scheduling
decisions possible in order to save power. I'd like to think of it as
a linux-next tree focused on asymmetric support enablement.

Viresh will recreate this tree when new versions of the topic
patchsets are available. IOW, as the patches are reviewed on the lists
and go through iterations, we'll pull each topic patchset into a topic
branch (e.g. per-task-load-average-v2, arm-asymmetric-support-v3).
Then a merge tree will be created (e.g. big-LITTLE-MP-v1) as needed
based on the latest versions of these topics. This should allow users
to track individual topics or leave out some topics if they so desire.
More topics will be added to this tree as the work becomes available.

Linaro platform team will take the merge branch (big-LITTLE-MP-v1,
-v2, etc.) and use it for platform enablement work and testing on real
hardware and models.

Problems should be reported on LKML/LAKML as usual if they are related
to the individual topic trees. If they're related to a bad merge or
config enablement please report on linaro-dev@lists.linaro.org.

Hi Andrey,

big-LITTLE-MP-v2 is ready to be pulled in. Following is a pull request for it:

--------------8<--------------------->8-------------------

The following changes since commit bd0a521e88aa7a06ae7aabaed7ae196ed4ad867a:

Linux 3.5-rc6 (2012-07-07 17:23:56 -0700)

are available in the git repository at:

git://git.linaro.org/arm/big.LITTLE/mp.git big-LITTLE-MP-v2

for you to fetch changes up to ca789c61deb0219cd3fefdb26090bbc9701deada:

Merge branches 'arm-asymmetric-support-v3', 'cpuidle-next-v4', 'per-cpu-thread-hotplug-v2', 'task-placement-v1' and 'config-fragments' into big-LITTLE-MP-v3 (2012-07-11 10:51:29 +0100)

----------------------------------------------------------------

Ben Segall (1):

sched: maintain per-rq runnable averages

Colin Cross (4):

cpuidle: refactor out cpuidle_enter_state

cpuidle: fix error handling in __cpuidle_register_device

cpuidle: add support for states that affect multiple cpus

cpuidle: coupled: add parallel barrier function

Morten Rasmussen (5):

sched: Add ftrace events for entity load-tracking

sched: entity load-tracking load_avg_ratio

sched: load-tracking driven wakeup migration for HMP platforms

sched: Forced migration of high load task on HMP platforms

sched: Add HMP forced task migration ftrace event

Paul E. McKenney (1):

rcu: Use smp_hotplug_thread facility for RCUs per-CPU kthread

Paul Turner (15):

sched: track the runnable average on a per-task entitiy basis

sched: aggregate load contributed by task entities on parenting cfs_rq

sched: maintain the load contribution of blocked entities

sched: add an rq migration call-back to sched_class

sched: account for blocked load waking back up

sched: aggregate total task_group load

sched: compute load contribution by a group entity

sched: normalize tg load contributions against runnable time

sched: maintain runnable averages across throttled periods

sched: replace update_shares weight distribution with per-entity computation

sched: refactor update_shares_cpu() -> update_blocked_avgs()

sched: update_cfs_shares at period edge

sched: make __update_entity_runnable_avg() fast

sched: implement usage tracking

sched: introduce temporary FAIR_GROUP_SCHED dependency for load-tracking

Peter Zijlstra (1):

sched, x86: Remove broken power estimation

Thomas Gleixner (6):

rcu: Yield simpler

kthread: Implement park/unpark facility

smpboot: Provide infrastructure for percpu hotplug threads

softirq: Use hotplug thread infrastructure

watchdog: Use hotplug thread infrastructure

infiniband: ehca: Use hotplug thread infrastructure

Vincent Guittot (4):

ARM: topology: Add arch_scale_freq_power function

ARM: topology: factorize the update of sibling masks

ARM: topology: Update cpu_power according to DT information

sched: cpu_power: enable ARCH_POWER

Viresh Kumar (3):

configs: Add config fragments for big LITTLE MP

linaro/configs: Update big LITTLE MP fragment for task placement work

Merge branches 'arm-asymmetric-support-v3', 'cpuidle-next-v4', 'per-cpu-thread-hotplug-v2', 'task-placement-v1' and 'config-fragments' into big-LITTLE-MP-v3

arch/arm/Kconfig | 29 +

arch/arm/kernel/topology.c | 209 +++-

arch/x86/kernel/cpu/Makefile | 2 +-

arch/x86/kernel/cpu/sched.c | 55 -

drivers/cpuidle/Kconfig | 3 +

drivers/cpuidle/Makefile | 1 +

drivers/cpuidle/coupled.c | 715 +++++++++++

drivers/cpuidle/cpuidle.c | 68 +-

drivers/cpuidle/cpuidle.h | 32 +

drivers/infiniband/hw/ehca/ehca_irq.c | 240 ++--

drivers/infiniband/hw/ehca/ehca_irq.h | 5 +-

include/linux/cpuidle.h | 11 +

include/linux/kthread.h | 11 +-

include/linux/sched.h | 19 +

include/linux/smpboot.h | 40 +

include/trace/events/sched.h | 151 +++

kernel/cpu.c | 10 +-

kernel/kthread.c | 184 ++-

kernel/rcutree.c | 12 +-

kernel/rcutree.h | 15 +-

kernel/rcutree_plugin.h | 375 +-----

kernel/rcutree_trace.c | 3 +-

kernel/sched/core.c | 5 +

kernel/sched/debug.c | 39 +-

kernel/sched/fair.c | 1105 ++++++++++++++---

kernel/sched/features.h | 2 +-

kernel/sched/sched.h | 60 +-

kernel/smpboot.c | 206 ++++

kernel/smpboot.h | 4 +

kernel/softirq.c | 84 +-

kernel/watchdog.c | 231 ++--

linaro/configs/android.conf | 30 +

linaro/configs/big-LITTLE-MP.conf | 9 +

linaro/configs/linaro-base.conf | 84 ++

linaro/configs/ubuntu-minimal.conf | 24 +

linaro/configs/ubuntu.conf | 2133 +++++++++++++++++++++++++++++++++

36 files changed, 5174 insertions(+), 1032 deletions(-)

delete mode 100644 arch/x86/kernel/cpu/sched.c

create mode 100644 drivers/cpuidle/coupled.c

create mode 100644 include/linux/smpboot.h

create mode 100644 linaro/configs/android.conf

create mode 100644 linaro/configs/big-LITTLE-MP.conf

create mode 100644 linaro/configs/linaro-base.conf

create mode 100644 linaro/configs/ubuntu-minimal.conf

create mode 100644 linaro/configs/ubuntu.conf