[PATCH 4/6] cpuidle: teo: Increase minimum time to stop tick

[Christian Loehle]

Since stopping the tick isn't free, add at least some minor constant
(1ms) for the threshold to stop the tick.

Signed-off-by: Christian Loehle <christian.loehle@xxxxxxx>
---
 drivers/cpuidle/governors/teo.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/cpuidle/governors/teo.c b/drivers/cpuidle/governors/teo.c
index 216d34747e3b..ca9422bbd8db 100644
--- a/drivers/cpuidle/governors/teo.c
+++ b/drivers/cpuidle/governors/teo.c
@@ -622,10 +622,10 @@ static int teo_select(struct cpuidle_driver *drv, struct cpuidle_device *dev,
 	/*
 	 * Allow the tick to be stopped unless the selected state is a polling
 	 * one or the expected idle duration is shorter than the tick period
-	 * length.
+	 * length plus some constant (1ms) to account for stopping it.
 	 */
 	if ((!(drv->states[idx].flags & CPUIDLE_FLAG_POLLING) &&
-	    duration_ns >= TICK_NSEC) || tick_nohz_tick_stopped())
+	    duration_ns > NSEC_PER_MSEC + TICK_NSEC) || tick_nohz_tick_stopped())
 		return idx;
 
 out_tick_state:
-- 
2.34.1