preemption latency trace v1.0.2 ------------------------------- latency: 114 us, entries: 245 (245) ----------------- | task: screen/2855, uid:0 nice:0 policy:0 rt_prio:0 ----------------- => started at: unmap_vmas+0x15b/0x1f0 => ended at: unmap_vmas+0x15b/0x1f0 =======> 00000001 0.000ms (+0.000ms): touch_preempt_timing (unmap_vmas) 00000001 0.000ms (+0.000ms): unmap_page_range (unmap_vmas) 00000001 0.000ms (+0.000ms): zap_pmd_range (unmap_page_range) 00000001 0.001ms (+0.000ms): zap_pte_range (zap_pmd_range) 00000001 0.001ms (+0.000ms): page_address (zap_pte_range) 00000001 0.001ms (+0.000ms): set_page_dirty (zap_pte_range) 00000001 0.002ms (+0.000ms): __set_page_dirty_nobuffers (set_page_dirty) 00000002 0.002ms (+0.000ms): radix_tree_tag_set (__set_page_dirty_nobuffers) 00000001 0.003ms (+0.000ms): page_remove_rmap (zap_pte_range) 00000001 0.003ms (+0.000ms): free_page_and_swap_cache (zap_pte_range) 00000001 0.004ms (+0.000ms): remove_exclusive_swap_page (free_page_and_swap_cache) 00000001 0.004ms (+0.000ms): swap_info_get (remove_exclusive_swap_page) 00000004 0.004ms (+0.000ms): __delete_from_swap_cache (remove_exclusive_swap_page) 00000004 0.005ms (+0.000ms): radix_tree_delete (__delete_from_swap_cache) 00000003 0.006ms (+0.000ms): swap_info_put (remove_exclusive_swap_page) 00000001 0.006ms (+0.000ms): swap_free (remove_exclusive_swap_page) 00000001 0.006ms (+0.000ms): swap_info_get (swap_free) 00000003 0.007ms (+0.000ms): swap_entry_free (swap_free) 00000003 0.007ms (+0.000ms): swap_info_put (remove_exclusive_swap_page) 00000001 0.007ms (+0.000ms): unlock_page (free_page_and_swap_cache) 00000001 0.008ms (+0.000ms): wake_up_page (unlock_page) 00000001 0.008ms (+0.000ms): page_waitqueue (wake_up_page) 00000001 0.008ms (+0.000ms): __page_cache_release (zap_pte_range) 00000001 0.009ms (+0.000ms): free_hot_page (zap_pte_range) 00000001 0.009ms (+0.000ms): free_hot_cold_page (zap_pte_range) 00000001 0.010ms (+0.000ms): set_page_dirty (zap_pte_range) 00000001 0.010ms (+0.000ms): __set_page_dirty_nobuffers (set_page_dirty) 00000002 0.010ms (+0.000ms): radix_tree_tag_set (__set_page_dirty_nobuffers) 00000001 0.011ms (+0.000ms): page_remove_rmap (zap_pte_range) 00000001 0.012ms (+0.000ms): free_page_and_swap_cache (zap_pte_range) 00000001 0.012ms (+0.000ms): remove_exclusive_swap_page (free_page_and_swap_cache) 00000001 0.012ms (+0.000ms): swap_info_get (remove_exclusive_swap_page) 00000004 0.013ms (+0.000ms): __delete_from_swap_cache (remove_exclusive_swap_page) 00000004 0.013ms (+0.000ms): radix_tree_delete (__delete_from_swap_cache) 00000003 0.014ms (+0.000ms): swap_info_put (remove_exclusive_swap_page) 00000001 0.014ms (+0.000ms): swap_free (remove_exclusive_swap_page) 00000001 0.014ms (+0.000ms): swap_info_get (swap_free) 00000003 0.015ms (+0.000ms): swap_entry_free (swap_free) 00000003 0.015ms (+0.000ms): swap_info_put (remove_exclusive_swap_page) 00000001 0.015ms (+0.000ms): unlock_page (free_page_and_swap_cache) 00000001 0.016ms (+0.000ms): wake_up_page (unlock_page) 00000001 0.016ms (+0.000ms): page_waitqueue (wake_up_page) 00000001 0.016ms (+0.000ms): __page_cache_release (zap_pte_range) 00000001 0.017ms (+0.000ms): free_hot_page (zap_pte_range) 00000001 0.017ms (+0.000ms): free_hot_cold_page (zap_pte_range) 00000001 0.018ms (+0.000ms): set_page_dirty (zap_pte_range) 00000001 0.018ms (+0.000ms): __set_page_dirty_nobuffers (set_page_dirty) 00000002 0.019ms (+0.000ms): radix_tree_tag_set (__set_page_dirty_nobuffers) 00000001 0.019ms (+0.000ms): page_remove_rmap (zap_pte_range) 00000001 0.020ms (+0.000ms): free_page_and_swap_cache (zap_pte_range) 00000001 0.020ms (+0.000ms): remove_exclusive_swap_page (free_page_and_swap_cache) 00000001 0.020ms (+0.000ms): swap_info_get (remove_exclusive_swap_page) 00000004 0.021ms (+0.000ms): __delete_from_swap_cache (remove_exclusive_swap_page) 00000004 0.021ms (+0.000ms): radix_tree_delete (__delete_from_swap_cache) 00000003 0.022ms (+0.000ms): swap_info_put (remove_exclusive_swap_page) 00000001 0.022ms (+0.000ms): swap_free (remove_exclusive_swap_page) 00000001 0.022ms (+0.000ms): swap_info_get (swap_free) 00000003 0.023ms (+0.000ms): swap_entry_free (swap_free) 00000003 0.023ms (+0.000ms): swap_info_put (remove_exclusive_swap_page) 00000001 0.023ms (+0.000ms): unlock_page (free_page_and_swap_cache) 00010001 0.025ms (+0.001ms): do_IRQ (mcount) 00010002 0.025ms (+0.000ms): mask_and_ack_8259A (do_IRQ) 00010002 0.028ms (+0.002ms): generic_redirect_hardirq (do_IRQ) 00010001 0.028ms (+0.000ms): generic_handle_IRQ_event (do_IRQ) 00010001 0.029ms (+0.000ms): timer_interrupt (generic_handle_IRQ_event) 00010002 0.029ms (+0.000ms): mark_offset_tsc (timer_interrupt) 00010002 0.036ms (+0.007ms): do_timer (timer_interrupt) 00010002 0.037ms (+0.000ms): update_process_times (do_timer) 00010002 0.037ms (+0.000ms): update_one_process (update_process_times) 00010002 0.038ms (+0.000ms): run_local_timers (update_process_times) 00010002 0.039ms (+0.000ms): raise_softirq (update_process_times) 00010002 0.039ms (+0.000ms): scheduler_tick (update_process_times) 00010002 0.039ms (+0.000ms): sched_clock (scheduler_tick) 00010003 0.041ms (+0.001ms): task_timeslice (scheduler_tick) 00010002 0.043ms (+0.001ms): update_wall_time (do_timer) 00010002 0.043ms (+0.000ms): update_wall_time_one_tick (update_wall_time) 00010002 0.043ms (+0.000ms): profile_hook (timer_interrupt) 00010003 0.044ms (+0.000ms): notifier_call_chain (profile_hook) 00010002 0.045ms (+0.001ms): generic_note_interrupt (do_IRQ) 00010002 0.045ms (+0.000ms): end_8259A_irq (do_IRQ) 00010002 0.046ms (+0.000ms): enable_8259A_irq (do_IRQ) 00000002 0.047ms (+0.001ms): do_softirq (do_IRQ) 00000002 0.048ms (+0.000ms): __do_softirq (do_softirq) 00000002 0.048ms (+0.000ms): wake_up_process (do_softirq) 00000002 0.048ms (+0.000ms): try_to_wake_up (wake_up_process) 00000002 0.049ms (+0.000ms): task_rq_lock (try_to_wake_up) 00000003 0.049ms (+0.000ms): activate_task (try_to_wake_up) 00000003 0.050ms (+0.000ms): sched_clock (activate_task) 00000003 0.050ms (+0.000ms): recalc_task_prio (activate_task) 00000003 0.051ms (+0.000ms): effective_prio (recalc_task_prio) 00000003 0.051ms (+0.000ms): enqueue_task (activate_task) 00000002 0.052ms (+0.000ms): preempt_schedule (try_to_wake_up) 00000001 0.053ms (+0.001ms): wake_up_page (unlock_page) 00000001 0.054ms (+0.000ms): page_waitqueue (wake_up_page) 00000001 0.054ms (+0.000ms): __page_cache_release (zap_pte_range) 00000001 0.055ms (+0.000ms): preempt_schedule (__page_cache_release) 00000001 0.055ms (+0.000ms): free_hot_page (zap_pte_range) 00000001 0.055ms (+0.000ms): free_hot_cold_page (zap_pte_range) 00000001 0.056ms (+0.000ms): preempt_schedule (zap_pte_range) 00000001 0.056ms (+0.000ms): set_page_dirty (zap_pte_range) 00000001 0.057ms (+0.000ms): __set_page_dirty_nobuffers (set_page_dirty) 00000002 0.057ms (+0.000ms): radix_tree_tag_set (__set_page_dirty_nobuffers) 00000001 0.058ms (+0.000ms): preempt_schedule (__set_page_dirty_nobuffers) 00000001 0.058ms (+0.000ms): page_remove_rmap (zap_pte_range) 00000001 0.059ms (+0.000ms): preempt_schedule (zap_pte_range) 00000001 0.059ms (+0.000ms): free_page_and_swap_cache (zap_pte_range) 00000001 0.059ms (+0.000ms): remove_exclusive_swap_page (free_page_and_swap_cache) 00000001 0.060ms (+0.000ms): swap_info_get (remove_exclusive_swap_page) 00000004 0.060ms (+0.000ms): __delete_from_swap_cache (remove_exclusive_swap_page) 00000004 0.061ms (+0.000ms): radix_tree_delete (__delete_from_swap_cache) 00000003 0.062ms (+0.001ms): preempt_schedule (remove_exclusive_swap_page) 00000003 0.062ms (+0.000ms): swap_info_put (remove_exclusive_swap_page) 00000002 0.062ms (+0.000ms): preempt_schedule (swap_info_put) 00000001 0.063ms (+0.000ms): preempt_schedule (remove_exclusive_swap_page) 00000001 0.063ms (+0.000ms): swap_free (remove_exclusive_swap_page) 00000001 0.063ms (+0.000ms): swap_info_get (swap_free) 00000003 0.064ms (+0.000ms): swap_entry_free (swap_free) 00000003 0.064ms (+0.000ms): swap_info_put (remove_exclusive_swap_page) 00000002 0.064ms (+0.000ms): preempt_schedule (swap_info_put) 00000001 0.065ms (+0.000ms): preempt_schedule (remove_exclusive_swap_page) 00000001 0.065ms (+0.000ms): unlock_page (free_page_and_swap_cache) 00000001 0.065ms (+0.000ms): wake_up_page (unlock_page) 00000001 0.066ms (+0.000ms): page_waitqueue (wake_up_page) 00000001 0.066ms (+0.000ms): __page_cache_release (zap_pte_range) 00000001 0.066ms (+0.000ms): preempt_schedule (__page_cache_release) 00000001 0.067ms (+0.000ms): free_hot_page (zap_pte_range) 00000001 0.067ms (+0.000ms): free_hot_cold_page (zap_pte_range) 00000001 0.068ms (+0.000ms): preempt_schedule (zap_pte_range) 00000001 0.068ms (+0.000ms): set_page_dirty (zap_pte_range) 00000001 0.068ms (+0.000ms): __set_page_dirty_nobuffers (set_page_dirty) 00000002 0.069ms (+0.000ms): radix_tree_tag_set (__set_page_dirty_nobuffers) 00000001 0.069ms (+0.000ms): preempt_schedule (__set_page_dirty_nobuffers) 00000001 0.070ms (+0.000ms): page_remove_rmap (zap_pte_range) 00000001 0.070ms (+0.000ms): preempt_schedule (zap_pte_range) 00000001 0.070ms (+0.000ms): free_page_and_swap_cache (zap_pte_range) 00000001 0.071ms (+0.000ms): remove_exclusive_swap_page (free_page_and_swap_cache) 00000001 0.071ms (+0.000ms): swap_info_get (remove_exclusive_swap_page) 00000004 0.071ms (+0.000ms): __delete_from_swap_cache (remove_exclusive_swap_page) 00000004 0.072ms (+0.000ms): radix_tree_delete (__delete_from_swap_cache) 00000003 0.072ms (+0.000ms): preempt_schedule (remove_exclusive_swap_page) 00000003 0.073ms (+0.000ms): swap_info_put (remove_exclusive_swap_page) 00000002 0.073ms (+0.000ms): preempt_schedule (swap_info_put) 00000001 0.073ms (+0.000ms): preempt_schedule (remove_exclusive_swap_page) 00000001 0.074ms (+0.000ms): swap_free (remove_exclusive_swap_page) 00000001 0.074ms (+0.000ms): swap_info_get (swap_free) 00000003 0.074ms (+0.000ms): swap_entry_free (swap_free) 00000003 0.075ms (+0.000ms): swap_info_put (remove_exclusive_swap_page) 00000002 0.075ms (+0.000ms): preempt_schedule (swap_info_put) 00000001 0.075ms (+0.000ms): preempt_schedule (remove_exclusive_swap_page) 00000001 0.076ms (+0.000ms): unlock_page (free_page_and_swap_cache) 00000001 0.076ms (+0.000ms): wake_up_page (unlock_page) 00000001 0.076ms (+0.000ms): page_waitqueue (wake_up_page) 00000001 0.076ms (+0.000ms): __page_cache_release (zap_pte_range) 00000001 0.077ms (+0.000ms): preempt_schedule (__page_cache_release) 00000001 0.077ms (+0.000ms): free_hot_page (zap_pte_range) 00000001 0.077ms (+0.000ms): free_hot_cold_page (zap_pte_range) 00000001 0.078ms (+0.000ms): preempt_schedule (zap_pte_range) 00000001 0.078ms (+0.000ms): set_page_dirty (zap_pte_range) 00000001 0.079ms (+0.000ms): __set_page_dirty_nobuffers (set_page_dirty) 00000002 0.079ms (+0.000ms): radix_tree_tag_set (__set_page_dirty_nobuffers) 00000001 0.080ms (+0.000ms): preempt_schedule (__set_page_dirty_nobuffers) 00000001 0.080ms (+0.000ms): page_remove_rmap (zap_pte_range) 00000001 0.081ms (+0.000ms): preempt_schedule (zap_pte_range) 00000001 0.081ms (+0.000ms): free_page_and_swap_cache (zap_pte_range) 00000001 0.081ms (+0.000ms): remove_exclusive_swap_page (free_page_and_swap_cache) 00000001 0.081ms (+0.000ms): swap_info_get (remove_exclusive_swap_page) 00000004 0.082ms (+0.000ms): __delete_from_swap_cache (remove_exclusive_swap_page) 00000004 0.082ms (+0.000ms): radix_tree_delete (__delete_from_swap_cache) 00000003 0.083ms (+0.000ms): preempt_schedule (remove_exclusive_swap_page) 00000003 0.083ms (+0.000ms): swap_info_put (remove_exclusive_swap_page) 00000002 0.084ms (+0.000ms): preempt_schedule (swap_info_put) 00000001 0.084ms (+0.000ms): preempt_schedule (remove_exclusive_swap_page) 00000001 0.084ms (+0.000ms): swap_free (remove_exclusive_swap_page) 00000001 0.084ms (+0.000ms): swap_info_get (swap_free) 00000003 0.085ms (+0.000ms): swap_entry_free (swap_free) 00000003 0.085ms (+0.000ms): swap_info_put (remove_exclusive_swap_page) 00000002 0.085ms (+0.000ms): preempt_schedule (swap_info_put) 00000001 0.086ms (+0.000ms): preempt_schedule (remove_exclusive_swap_page) 00000001 0.086ms (+0.000ms): unlock_page (free_page_and_swap_cache) 00000001 0.086ms (+0.000ms): wake_up_page (unlock_page) 00000001 0.087ms (+0.000ms): page_waitqueue (wake_up_page) 00000001 0.087ms (+0.000ms): __page_cache_release (zap_pte_range) 00000001 0.087ms (+0.000ms): preempt_schedule (__page_cache_release) 00000001 0.088ms (+0.000ms): free_hot_page (zap_pte_range) 00000001 0.088ms (+0.000ms): free_hot_cold_page (zap_pte_range) 00000001 0.089ms (+0.000ms): preempt_schedule (zap_pte_range) 00000001 0.089ms (+0.000ms): set_page_dirty (zap_pte_range) 00000001 0.089ms (+0.000ms): __set_page_dirty_nobuffers (set_page_dirty) 00000002 0.090ms (+0.000ms): radix_tree_tag_set (__set_page_dirty_nobuffers) 00000001 0.090ms (+0.000ms): preempt_schedule (__set_page_dirty_nobuffers) 00000001 0.091ms (+0.000ms): page_remove_rmap (zap_pte_range) 00000001 0.091ms (+0.000ms): preempt_schedule (zap_pte_range) 00000001 0.091ms (+0.000ms): free_page_and_swap_cache (zap_pte_range) 00000001 0.092ms (+0.000ms): remove_exclusive_swap_page (free_page_and_swap_cache) 00000001 0.092ms (+0.000ms): swap_info_get (remove_exclusive_swap_page) 00000004 0.092ms (+0.000ms): __delete_from_swap_cache (remove_exclusive_swap_page) 00000004 0.093ms (+0.000ms): radix_tree_delete (__delete_from_swap_cache) 00000003 0.093ms (+0.000ms): preempt_schedule (remove_exclusive_swap_page) 00000003 0.094ms (+0.000ms): swap_info_put (remove_exclusive_swap_page) 00000002 0.094ms (+0.000ms): preempt_schedule (swap_info_put) 00000001 0.094ms (+0.000ms): preempt_schedule (remove_exclusive_swap_page) 00000001 0.095ms (+0.000ms): swap_free (remove_exclusive_swap_page) 00000001 0.095ms (+0.000ms): swap_info_get (swap_free) 00000003 0.095ms (+0.000ms): swap_entry_free (swap_free) 00000003 0.096ms (+0.000ms): swap_info_put (remove_exclusive_swap_page) 00000002 0.096ms (+0.000ms): preempt_schedule (swap_info_put) 00000001 0.096ms (+0.000ms): preempt_schedule (remove_exclusive_swap_page) 00000001 0.097ms (+0.000ms): unlock_page (free_page_and_swap_cache) 00000001 0.097ms (+0.000ms): wake_up_page (unlock_page) 00000001 0.097ms (+0.000ms): page_waitqueue (wake_up_page) 00000001 0.097ms (+0.000ms): __page_cache_release (zap_pte_range) 00000001 0.098ms (+0.000ms): preempt_schedule (__page_cache_release) 00000001 0.098ms (+0.000ms): free_hot_page (zap_pte_range) 00000001 0.098ms (+0.000ms): free_hot_cold_page (zap_pte_range) 00000001 0.099ms (+0.000ms): preempt_schedule (zap_pte_range) 00000001 0.099ms (+0.000ms): set_page_dirty (zap_pte_range) 00000001 0.100ms (+0.000ms): __set_page_dirty_nobuffers (set_page_dirty) 00000002 0.100ms (+0.000ms): radix_tree_tag_set (__set_page_dirty_nobuffers) 00000001 0.101ms (+0.000ms): preempt_schedule (__set_page_dirty_nobuffers) 00000001 0.101ms (+0.000ms): page_remove_rmap (zap_pte_range) 00000001 0.102ms (+0.000ms): preempt_schedule (zap_pte_range) 00000001 0.102ms (+0.000ms): free_page_and_swap_cache (zap_pte_range) 00000001 0.102ms (+0.000ms): remove_exclusive_swap_page (free_page_and_swap_cache) 00000001 0.102ms (+0.000ms): swap_info_get (remove_exclusive_swap_page) 00000004 0.103ms (+0.000ms): __delete_from_swap_cache (remove_exclusive_swap_page) 00000004 0.103ms (+0.000ms): radix_tree_delete (__delete_from_swap_cache) 00000003 0.104ms (+0.000ms): preempt_schedule (remove_exclusive_swap_page) 00000003 0.104ms (+0.000ms): swap_info_put (remove_exclusive_swap_page) 00000002 0.105ms (+0.000ms): preempt_schedule (swap_info_put) 00000001 0.105ms (+0.000ms): preempt_schedule (remove_exclusive_swap_page) 00000001 0.105ms (+0.000ms): swap_free (remove_exclusive_swap_page) 00000001 0.106ms (+0.000ms): swap_info_get (swap_free) 00000003 0.106ms (+0.000ms): swap_entry_free (swap_free) 00000003 0.106ms (+0.000ms): swap_info_put (remove_exclusive_swap_page) 00000002 0.107ms (+0.000ms): preempt_schedule (swap_info_put) 00000001 0.107ms (+0.000ms): preempt_schedule (remove_exclusive_swap_page) 00000001 0.107ms (+0.000ms): unlock_page (free_page_and_swap_cache) 00000001 0.107ms (+0.000ms): wake_up_page (unlock_page) 00000001 0.108ms (+0.000ms): page_waitqueue (wake_up_page) 00000001 0.108ms (+0.000ms): __page_cache_release (zap_pte_range) 00000001 0.109ms (+0.000ms): preempt_schedule (__page_cache_release) 00000001 0.109ms (+0.000ms): free_hot_page (zap_pte_range) 00000001 0.109ms (+0.000ms): free_hot_cold_page (zap_pte_range) 00000001 0.110ms (+0.000ms): preempt_schedule (zap_pte_range) 00000001 0.111ms (+0.001ms): touch_preempt_timing (unmap_vmas)