From 03dd4cb26d967f9588437b0fc9cc0e8353322bb7 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Fri, 25 Mar 2016 03:53:42 -0300 Subject: Linux-libre 4.5-gnu --- drivers/cpuidle/governors/menu.c | 27 ++++++++++++++++----------- 1 file changed, 16 insertions(+), 11 deletions(-) (limited to 'drivers/cpuidle/governors/menu.c') diff --git a/drivers/cpuidle/governors/menu.c b/drivers/cpuidle/governors/menu.c index 22e4463d1..0742b3296 100644 --- a/drivers/cpuidle/governors/menu.c +++ b/drivers/cpuidle/governors/menu.c @@ -294,8 +294,6 @@ static int menu_select(struct cpuidle_driver *drv, struct cpuidle_device *dev) data->needs_update = 0; } - data->last_state_idx = CPUIDLE_DRIVER_STATE_START - 1; - /* Special case when user has set very strict latency requirement */ if (unlikely(latency_req == 0)) return 0; @@ -326,20 +324,25 @@ static int menu_select(struct cpuidle_driver *drv, struct cpuidle_device *dev) if (latency_req > interactivity_req) latency_req = interactivity_req; - /* - * We want to default to C1 (hlt), not to busy polling - * unless the timer is happening really really soon. - */ - if (data->next_timer_us > 5 && - !drv->states[CPUIDLE_DRIVER_STATE_START].disabled && - dev->states_usage[CPUIDLE_DRIVER_STATE_START].disable == 0) + if (CPUIDLE_DRIVER_STATE_START > 0) { + data->last_state_idx = CPUIDLE_DRIVER_STATE_START - 1; + /* + * We want to default to C1 (hlt), not to busy polling + * unless the timer is happening really really soon. + */ + if (interactivity_req > 20 && + !drv->states[CPUIDLE_DRIVER_STATE_START].disabled && + dev->states_usage[CPUIDLE_DRIVER_STATE_START].disable == 0) + data->last_state_idx = CPUIDLE_DRIVER_STATE_START; + } else { data->last_state_idx = CPUIDLE_DRIVER_STATE_START; + } /* * Find the idle state with the lowest power while satisfying * our constraints. */ - for (i = CPUIDLE_DRIVER_STATE_START; i < drv->state_count; i++) { + for (i = data->last_state_idx + 1; i < drv->state_count; i++) { struct cpuidle_state *s = &drv->states[i]; struct cpuidle_state_usage *su = &dev->states_usage[i]; @@ -404,8 +407,10 @@ static void menu_update(struct cpuidle_driver *drv, struct cpuidle_device *dev) measured_us = cpuidle_get_last_residency(dev); /* Deduct exit latency */ - if (measured_us > target->exit_latency) + if (measured_us > 2 * target->exit_latency) measured_us -= target->exit_latency; + else + measured_us /= 2; /* Make sure our coefficients do not exceed unity */ if (measured_us > data->next_timer_us) -- cgit v1.2.3-54-g00ecf