@@ -361,6 +361,7 @@ static int teo_select(struct cpuidle_dri
unsigned int recent_sum = 0;
unsigned int idx_hit_sum = 0;
unsigned int hit_sum = 0;
+ unsigned int thresh_sum = 0;
int constraint_idx = 0;
int idx0 = 0, idx = -1;
bool alt_intercepts, alt_recent;
@@ -376,6 +377,8 @@ static int teo_select(struct cpuidle_dri
duration_ns = tick_ns = tick_get_sleep_length(false);
+ thresh_sum = 2 * cpu_data->total / 3; /* 66% */
+
/*
* Find the deepest idle state whose target residency does not exceed
* the current sleep length and the deepest idle state not deeper than
@@ -406,6 +409,9 @@ static int teo_select(struct cpuidle_dri
if (s->target_residency_ns > duration_ns)
break;
+ if (intercept_sum + hit_sum > thresh_sum)
+ break;
+
if (s->target_residency_ns == SHORT_TICK_NSEC) {
/*
* We hit the tick state, see if it makes sense to
When selecting a state, stop when history tells us 66% of recent idles were at or below our current state. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> --- drivers/cpuidle/governors/teo.c | 6 ++++++ 1 file changed, 6 insertions(+)