sched: Introduce HMP scheduling
Add a snapshot of all changes associated with the HMP scheduler
ported over to the latest kernel version. This will allow proper big
Little scheduling for targets that will use this kernel version.
The msm-4-4 snapshot is taken at commitcc60f0790f27 (sched: constrain
HMP scheduler tunable range with in better way).
Please note that this is not an exact snapshot; certain HMP related
code has been removed. This includes redundant code, useless CONFIG
options, rarely taken error code paths, runtime enable/disable support
for the HMP scheduler.
Change-Id: I923f35904008f1fb74ac9c1a39481810cdea5790
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
diff --git a/init/Kconfig b/init/Kconfig
index 34407f1..f595c26 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1165,6 +1165,23 @@
endif # CGROUPS
+config SCHED_HMP
+ bool "Scheduler support for heterogenous multi-processor systems"
+ depends on SMP && FAIR_GROUP_SCHED
+ help
+ This feature will let the scheduler optimize task placement on
+ systems made of heterogeneous cpus i.e cpus that differ either
+ in their instructions per-cycle capability or the maximum
+ frequency they can attain.
+
+config SCHED_HMP_CSTATE_AWARE
+ bool "CPU C-state aware scheduler"
+ depends on SCHED_HMP
+ help
+ This feature will let the HMP scheduler optimize task placement
+ with CPUs C-state. If this is enabled, scheduler places tasks
+ onto the shallowest C-state CPU among the most power efficient CPUs.
+
config CHECKPOINT_RESTORE
bool "Checkpoint/restore support" if EXPERT
select PROC_CHILDREN