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Quentin Perret 8e9d3d0740 ANDROID: sched/fair: Cap transient util in stune 
boosted_cpu_util() sums the CFS and RT util signals before they are used
for frequency selection. While the util_avg signals are in sync,
util_est prevents cpu_util_cfs() from decreasing when a CFS task is
preempted by RT.

This util_est behaviour is beneficial in many scenarios, but it can
cause the sum of rt_util and cfs_util to go above SCHED_CAPACITY_SCALE.
Although benign, this transient value appears in the stune tracepoints,
and can cause confusion.

Work around the problem by capping the util sum to SCHED_CAPACITY_SCALE.

Bug: 120440300
Change-Id: I2be6eb157af86024e52ae11715f5637c77b201a3
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
2019-08-16 14:46:14 +01:00
..
autogroup.c ANDROID: sched/autogroup: Define autogroup_path() for !CONFIG_SCHED_DEBUG 2018-10-26 12:44:03 +01:00
autogroup.h sched/headers: Simplify and clean up header usage in the scheduler 2018-03-04 12:39:29 +01:00
clock.c sched/clock: Disable interrupts when calling generic_sched_clock_init() 2018-07-30 19:33:35 +02:00
completion.c sched/Documentation: Update wake_up() & co. memory-barrier guarantees 2018-07-17 09:30:34 +02:00
core.c This is the 4.19.61 stable release 2019-07-26 10:31:53 +02:00
cpuacct.c sched/headers: Simplify and clean up header usage in the scheduler 2018-03-04 12:39:29 +01:00
cpudeadline.c sched/headers: Simplify and clean up header usage in the scheduler 2018-03-04 12:39:29 +01:00
cpudeadline.h sched/headers: Simplify and clean up header usage in the scheduler 2018-03-04 12:39:29 +01:00
cpufreq.c sched/headers: Simplify and clean up header usage in the scheduler 2018-03-04 12:39:29 +01:00
cpufreq_schedutil.c This is the 4.19.46 stable release 2019-05-25 19:09:59 +02:00
cpupri.c sched/headers: Simplify and clean up header usage in the scheduler 2018-03-04 12:39:29 +01:00
cpupri.h sched/headers: Simplify and clean up header usage in the scheduler 2018-03-04 12:39:29 +01:00
cputime.c ANDROID: cpufreq: track per-task time in state 2019-03-06 15:57:25 +00:00
deadline.c This is the 4.19.38 stable release 2019-05-02 10:13:34 +02:00
debug.c jump_label: move 'asm goto' support test to Kconfig 2019-06-04 08:02:34 +02:00
fair.c ANDROID: sched/fair: Cap transient util in stune 2019-08-16 14:46:14 +01:00
features.h ANDROID: sched: Disable find_best_target() by default 2019-03-27 15:58:02 +00:00
idle.c FROMLIST: sched/fair: Use wake_q length as a hint for wake_wide 2018-10-26 12:15:52 +01:00
isolation.c sched/headers: Simplify and clean up header usage in the scheduler 2018-03-04 12:39:29 +01:00
loadavg.c UPSTREAM: sched: loadavg: make calc_load_n() public 2019-03-21 16:25:27 -07:00
Makefile UPSTREAM: psi: pressure stall information for CPU, memory, and IO 2019-03-21 16:25:27 -07:00
membarrier.c sched/headers: Simplify and clean up header usage in the scheduler 2018-03-04 12:39:29 +01:00
pelt.c UPSTREAM: sched/fair: Update scale invariance of PELT 2019-03-26 14:22:50 +00:00
pelt.h UPSTREAM: sched/fair: Update scale invariance of PELT 2019-03-26 14:22:50 +00:00
psi.c FROMLIST: psi: introduce psi monitor 2019-03-22 23:07:14 +00:00
rt.c This is the 4.19.47 stable release 2019-05-31 08:14:29 -07:00
sched-pelt.h sched/fair: Fix "runnable_avg_yN_inv" not used warnings 2019-07-26 09:14:08 +02:00
sched.h This is the 4.19.48 stable release 2019-06-04 08:27:48 +02:00
stats.c proc: introduce proc_create_seq{,_data} 2018-05-16 07:23:35 +02:00
stats.h UPSTREAM: psi: make disabling/enabling easier for vendor kernels 2019-03-21 16:25:27 -07:00
stop_task.c FROMLIST: sched/fair: Use wake_q length as a hint for wake_wide 2018-10-26 12:15:52 +01:00
swait.c sched/swait: Rename to exclusive 2018-06-20 11:35:56 +02:00
topology.c This is the 4.19.34 stable release 2019-04-05 22:43:09 +02:00
tune.c ANDROID: Add hold functionality to schedtune CPU boost 2018-10-26 12:44:06 +01:00
tune.h ANDROID: sched/rt: Add schedtune accounting to rt task enqueue/dequeue 2018-10-26 12:44:06 +01:00
wait.c sched/wait: assert the wait_queue_head lock is held in __wake_up_common 2018-08-22 10:52:47 -07:00
wait_bit.c sched/wait: Improve __var_waitqueue() code generation 2018-03-20 08:23:25 +01:00