Messages in this thread | | | From | Karl Vogel <> | Subject | Re: [patch] voluntary-preempt-2.6.8.1-P6 -- False positive?! | Date | Sat, 21 Aug 2004 19:09:56 +0200 |
| |
I'm not sure if the following is a false positive or not:
preemption latency trace v1.0.1 ------------------------------- latency: 3022 us, entries: 15 (15) ----------------- | task: swapper/0, uid:0 nice:0 policy:0 rt_prio:0 ----------------- => started at: do_IRQ+0x27/0x230 => ended at: do_IRQ+0x1a3/0x230 =======> 00010000 0.000ms (+0.000ms): do_IRQ (common_interrupt) 00010000 0.000ms (+0.000ms): do_IRQ (acpi_processor_idle) 00010001 0.000ms (+0.000ms): ack_edge_ioapic_irq (do_IRQ) 00010001 0.000ms (+0.000ms): generic_redirect_hardirq (do_IRQ) 00010001 2.953ms (+2.952ms): wake_up_process (generic_redirect_hardirq) 00010001 2.953ms (+0.000ms): try_to_wake_up (wake_up_process) 00010001 2.953ms (+0.000ms): task_rq_lock (try_to_wake_up) 00010002 2.953ms (+0.000ms): activate_task (try_to_wake_up) 00010002 2.953ms (+0.000ms): sched_clock (activate_task) 00010002 2.953ms (+0.000ms): recalc_task_prio (activate_task) 00010002 2.953ms (+0.000ms): effective_prio (recalc_task_prio) 00010002 2.953ms (+0.000ms): enqueue_task (activate_task) 00010001 2.954ms (+0.000ms): preempt_schedule (try_to_wake_up) 00010000 2.954ms (+0.000ms): preempt_schedule (do_IRQ) 00000001 2.954ms (+0.000ms): sub_preempt_count (do_IRQ)
The following looks similar:
latency: 517 us, entries: 29 (29) ----------------- | task: swapper/0, uid:0 nice:0 policy:0 rt_prio:0 ----------------- => started at: do_IRQ+0x27/0x230 => ended at: do_IRQ+0x1a3/0x230 =======> 00010000 0.000ms (+0.000ms): do_IRQ (common_interrupt) 00010000 0.000ms (+0.000ms): do_IRQ (acpi_processor_idle) 00010001 0.000ms (+0.000ms): ack_edge_ioapic_irq (do_IRQ) 00010001 0.000ms (+0.000ms): generic_redirect_hardirq (do_IRQ) 00010000 0.000ms (+0.000ms): generic_handle_IRQ_event (do_IRQ) 00010000 0.000ms (+0.000ms): timer_interrupt (generic_handle_IRQ_event) 00010001 0.000ms (+0.000ms): mark_offset_tsc (timer_interrupt) 00010001 0.009ms (+0.008ms): do_timer (timer_interrupt) 00010001 0.503ms (+0.493ms): update_process_times (do_timer) 00010001 0.503ms (+0.000ms): update_one_process (update_process_times) 00010001 0.503ms (+0.000ms): run_local_timers (update_process_times) 00010001 0.503ms (+0.000ms): raise_softirq (update_process_times) 00010001 0.503ms (+0.000ms): scheduler_tick (update_process_times) 00010001 0.504ms (+0.000ms): sched_clock (scheduler_tick) 00010001 0.504ms (+0.000ms): update_wall_time (do_timer) 00010001 0.504ms (+0.000ms): update_wall_time_one_tick (update_wall_time) 00010001 0.504ms (+0.000ms): generic_note_interrupt (do_IRQ) 00010001 0.504ms (+0.000ms): end_edge_ioapic_irq (do_IRQ) 00000001 0.504ms (+0.000ms): do_softirq (do_IRQ) 00000100 0.505ms (+0.000ms): __do_softirq (do_softirq) 00000100 0.505ms (+0.000ms): wake_up_process (do_softirq) 00000100 0.505ms (+0.000ms): try_to_wake_up (wake_up_process) 00000100 0.505ms (+0.000ms): task_rq_lock (try_to_wake_up) 00000101 0.505ms (+0.000ms): activate_task (try_to_wake_up) 00000101 0.505ms (+0.000ms): sched_clock (activate_task) 00000101 0.505ms (+0.000ms): recalc_task_prio (activate_task) 00000101 0.505ms (+0.000ms): effective_prio (recalc_task_prio) 00000101 0.505ms (+0.000ms): enqueue_task (activate_task) 00000001 0.506ms (+0.000ms): sub_preempt_count (do_IRQ)
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |