diff options
| author | Vikram Mulukutla <markivx@codeaurora.org> | 2017-08-10 17:26:20 -0700 |
|---|---|---|
| committer | Joel Fernandes <joelaf@google.com> | 2017-10-27 11:58:48 -0700 |
| commit | e79f447a9762f68d6ecf8371bcf3e970bceb662a (patch) | |
| tree | 24bf123315e9152f2bea602138d913d98d8b08a5 /kernel/sched/sched.h | |
| parent | 38ddcff85af052ad99e4f3f0b6e9659b0ca10dcf (diff) | |
sched: walt: Correct WALT window size initialization
It is preferable that WALT window rollover occurs just
before a tick, since the tick is an opportune moment
to record a complete window's statistics, as well as report
those stats to the cpu frequency governor. When CONFIG_HZ
results in a TICK_NSEC that isn't a integral number, this
requirement may be violated. Account for this by reducing
the WALT window size to the nearest multiple of TICK_NSEC.
Commit d368c6faa19b ("sched: walt: fix window misalignment
when HZ=300") attempted to do this but WALT isn't using
MIN_SCHED_RAVG_WINDOW as the window size and the patch was
doing nothing.
Also, change the type of 'walt_disabled' to bool and warn
if an invalid window size causes WALT to be disabled.
Change-Id: Ie3dcfc21a3df4408254ca1165a355bbe391ed5c7
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>
Diffstat (limited to 'kernel/sched/sched.h')
| -rw-r--r-- | kernel/sched/sched.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index a2d5de8415e1..dd86072eaf4e 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -1560,7 +1560,7 @@ static inline unsigned long capacity_orig_of(int cpu) extern unsigned int sysctl_sched_use_walt_cpu_util; extern unsigned int walt_ravg_window; -extern unsigned int walt_disabled; +extern bool walt_disabled; /* * cpu_util returns the amount of capacity of a CPU that is used by CFS |