diff options
Diffstat (limited to 'drivers/cpuidle')
| -rw-r--r-- | drivers/cpuidle/governors/menu.c | 10 | ||||
| -rw-r--r-- | drivers/cpuidle/poll_state.c | 6 |
2 files changed, 15 insertions, 1 deletions
diff --git a/drivers/cpuidle/governors/menu.c b/drivers/cpuidle/governors/menu.c index b6684fd89085..8b3f9c7bf221 100644 --- a/drivers/cpuidle/governors/menu.c +++ b/drivers/cpuidle/governors/menu.c @@ -511,6 +511,16 @@ static void menu_update(struct cpuidle_driver *drv, struct cpuidle_device *dev) * duration predictor do a better job next time. */ measured_us = 9 * MAX_INTERESTING / 10; + } else if ((drv->states[last_idx].flags & CPUIDLE_FLAG_POLLING) && + dev->poll_time_limit) { + /* + * The CPU exited the "polling" state due to a time limit, so + * the idle duration prediction leading to the selection of that + * state was inaccurate. If a better prediction had been made, + * the CPU might have been woken up from idle by the next timer. + * Assume that to be the case. + */ + measured_us = data->next_timer_us; } else { /* measured value */ measured_us = dev->last_residency; diff --git a/drivers/cpuidle/poll_state.c b/drivers/cpuidle/poll_state.c index 3f86d23c592e..36ff5a1d9422 100644 --- a/drivers/cpuidle/poll_state.c +++ b/drivers/cpuidle/poll_state.c @@ -17,6 +17,8 @@ static int __cpuidle poll_idle(struct cpuidle_device *dev, { u64 time_start = local_clock(); + dev->poll_time_limit = false; + local_irq_enable(); if (!current_set_polling_and_test()) { unsigned int loop_count = 0; @@ -27,8 +29,10 @@ static int __cpuidle poll_idle(struct cpuidle_device *dev, continue; loop_count = 0; - if (local_clock() - time_start > POLL_IDLE_TIME_LIMIT) + if (local_clock() - time_start > POLL_IDLE_TIME_LIMIT) { + dev->poll_time_limit = true; break; + } } } current_clr_polling(); |