tree a813e30d6a97f47cec97bbdcdec5fecadc23fb01
parent db00ec15cbbaba8a6ea10a0ff6bd05bd8d61b362
author Valentin Schneider <valentin.schneider@arm.com> 1488541383 +0000
committer Andres Oportus <andresoportus@google.com> 1501799433 -0700

ANDROID: sched/fair: discount task contribution to find CPU with lowest utilization

In some cases, the new_util of a task can be the same on several
CPUs. This causes an issue because the target_util is only updated
if the current new_util is strictly smaller than target_util.

To fix that, the cpu_util_wake() return value is used alongside the
new_util value. If two CPUs compute the same new_util value,
we'll now also look at their cpu_util_wake() return value. In this
case, the CPU that last ran the task will be chosen in priority.

Change-Id: Ia1ea2c4b3ec39621372c2f748862317d5b497723
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Quentin Perret <quentin.perret@arm.com>