Commit e8450d43 authored Mar 02, 2017 by Saravana Kannan

cpufreq: schedutil: Ignore CPU load older than WALT window size



The old code used to ignore CPU load older than 1 tick. Since the WALT
window size can be more than 1 tick (and is configurable), this can cause
an incorrect frequency drop in the middle of a WALT window. Use WALT window
size to ignore CPU load instead.

Change-Id: If42420f595ba9722866174c2cda8b6c2fdf34f92
Signed-off-by: Saravana Kannan <skannan@codeaurora.org>

parent 05649863

kernel/sched/cpufreq_schedutil.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -253,7 +253,7 @@ static unsigned int sugov_next_freq_shared(struct sugov_cpu *sg_cpu,
		* idle now (and clear iowait_boost for it).
		*/
		delta_ns = last_freq_update_time - j_sg_cpu->last_update;
		if (delta_ns > TICK_NSEC) {
		if (delta_ns > sched_ravg_window) {
		j_sg_cpu->iowait_boost = 0;
		continue;
		}