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Message-ID: <4658A4F4.1080204@rncbc.org> Date: Sat, 26 May 2007 22:21:56 +0100 From: Rui Nuno Capela <rncbc@...bc.org> To: Thomas Gleixner <tglx@...utronix.de> CC: Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org Subject: Re: 2.6.21-rt2..8 troubles Thomas Gleixner wrote: > On Fri, 2007-05-25 at 21:58 +0100, Rui Nuno Capela wrote: >> Is there anything I can do better to help myself figuring out this >> issue? As this is a modern laptop such things like a serial console are >> unavailable, but it would be nice to track things up over netconsole >> perhaps? >> >> I just need some bright and nice directions now ;) Hope someone finds >> this worth of attention too. Meanwhile, I'll be happy with 2.6.21-rt1 :) > > Can you boot with "hpet=disable" on the command line ? > Nope. It doesn't seem to have significant effect. Same time-bomb behavior: after an indeterminate period of uptime, the systems stops responding and cannot spawn new processes (current running ones still live on, strange). > If that does not help, please provide the output of /proc/timer_list. > This is with my latest iteration: http://www.rncbc.org/datahub/config-2.6.21.1-rt8.0 Normal boot on which it behaves as badly as reported: http://www.rncbc.org/datahub/dmesg-2.6.21.1-rt8.0 # cat /proc/timer_list Timer List Version: v0.3 HRTIMER_MAX_CLOCK_BASES: 2 now at 131736771907 nsecs cpu: 0 clock 0: .index: 0 .resolution: 1 nsecs .get_time: ktime_get_real .offset: 1180213690448299114 nsecs active timers: clock 1: .index: 1 .resolution: 1 nsecs .get_time: ktime_get .offset: 0 nsecs active timers: #0: <ed7c4ef4>, tick_sched_timer, S:01 # expires at 131737000000 nsecs [in 228093 nsecs] #1: <ed7c4ef4>, it_real_fn, S:01 # expires at 131751277843 nsecs [in 14505936 nsecs] #2: <ed7c4ef4>, hrtimer_wakeup, S:01 # expires at 131802703679 nsecs [in 65931772 nsecs] #3: <ed7c4ef4>, hrtimer_wakeup, S:01 # expires at 131802705006 nsecs [in 65933099 nsecs] #4: <ed7c4ef4>, hrtimer_wakeup, S:01 # expires at 132412838830 nsecs [in 676066923 nsecs] #5: <ed7c4ef4>, it_real_fn, S:01 # expires at 137026607454 nsecs [in 5289835547 nsecs] #6: <ed7c4ef4>, hrtimer_wakeup, S:01 # expires at 141381493725 nsecs [in 9644721818 nsecs] #7: <ed7c4ef4>, hrtimer_wakeup, S:01 # expires at 170796028701 nsecs [in 39059256794 nsecs] .expires_next : 131737000000 nsecs .hres_active : 1 .nr_events : 40634 .nohz_mode : 2 .idle_tick : 131724000000 nsecs .tick_stopped : 0 .idle_jiffies : 4294799020 .idle_calls : 178848 .idle_sleeps : 133212 .idle_entrytime : 131736069830 nsecs .idle_sleeptime : 100895567465 nsecs .last_jiffies : 4294799033 .next_jiffies : 4294799039 .idle_expires : 131736000000 nsecs jiffies: 4294799033 cpu: 1 clock 0: .index: 0 .resolution: 1 nsecs .get_time: ktime_get_real .offset: 1180213690448299114 nsecs active timers: clock 1: .index: 1 .resolution: 1 nsecs .get_time: ktime_get .offset: 0 nsecs active timers: #0: <ed7c4ef4>, hrtimer_wakeup, S:01 # expires at 131737067173 nsecs [in 295266 nsecs] #1: <ed7c4ef4>, tick_sched_timer, S:01 # expires at 131737250000 nsecs [in 478093 nsecs] #2: <ed7c4ef4>, hrtimer_wakeup, S:01 # expires at 139151071745 nsecs [in 7414299838 nsecs] #3: <ed7c4ef4>, hrtimer_wakeup, S:01 # expires at 139151133755 nsecs [in 7414361848 nsecs] #4: <ed7c4ef4>, hrtimer_wakeup, S:01 # expires at 139151154005 nsecs [in 7414382098 nsecs] .expires_next : 131737067173 nsecs .hres_active : 1 .nr_events : 31510 .nohz_mode : 2 .idle_tick : 131734250000 nsecs .tick_stopped : 0 .idle_jiffies : 4294799030 .idle_calls : 151213 .idle_sleeps : 107018 .idle_entrytime : 131735193036 nsecs .idle_sleeptime : 108256832194 nsecs .last_jiffies : 4294799032 .next_jiffies : 4294799040 .idle_expires : 131743000000 nsecs jiffies: 4294799033 Tick Device: mode: 1 Clock Event Device: hpet max_delta_ns: 2147483647 min_delta_ns: 3352 mult: 61496110 shift: 32 mode: 3 next_event: 131737000000 nsecs set_next_event: hpet_legacy_next_event set_mode: hpet_legacy_set_mode event_handler: tick_handle_oneshot_broadcast tick_broadcast_mask: 00000003 tick_broadcast_oneshot_mask: 00000001 Tick Device: mode: 1 Clock Event Device: lapic max_delta_ns: 806914928 min_delta_ns: 1442 mult: 44650051 shift: 32 mode: 1 next_event: 131737000000 nsecs set_next_event: lapic_next_event set_mode: lapic_timer_setup event_handler: hrtimer_interrupt Tick Device: mode: 1 Clock Event Device: lapic max_delta_ns: 806914928 min_delta_ns: 1442 mult: 44650051 shift: 32 mode: 3 next_event: 131737067173 nsecs set_next_event: lapic_next_event set_mode: lapic_timer_setup event_handler: hrtimer_interrupt -- Alternate boot with hpet=disabled as suggested, but no better results: http://www.rncbc.org/datahub/dmesg-2.6.21.1-rt8.0-hpet_disabled # cat /proc/timer_list Timer List Version: v0.3 HRTIMER_MAX_CLOCK_BASES: 2 now at 269529706096 nsecs cpu: 0 clock 0: .index: 0 .resolution: 1 nsecs .get_time: ktime_get_real .offset: 1180214106093436428 nsecs active timers: clock 1: .index: 1 .resolution: 1 nsecs .get_time: ktime_get .offset: 0 nsecs active timers: #0: <ed2a2ef4>, tick_sched_timer, S:01 # expires at 269530000000 nsecs [in 293904 nsecs] #1: <ed2a2ef4>, hrtimer_wakeup, S:01 # expires at 269554568320 nsecs [in 24862224 nsecs] #2: <ed2a2ef4>, hrtimer_wakeup, S:01 # expires at 269585566924 nsecs [in 55860828 nsecs] #3: <ed2a2ef4>, hrtimer_wakeup, S:01 # expires at 269822782823 nsecs [in 293076727 nsecs] #4: <ed2a2ef4>, hrtimer_wakeup, S:01 # expires at 272726158017 nsecs [in 3196451921 nsecs] #5: <ed2a2ef4>, it_real_fn, S:01 # expires at 278007767018 nsecs [in 8478060922 nsecs] #6: <ed2a2ef4>, hrtimer_wakeup, S:01 # expires at 283716431029 nsecs [in 14186724933 nsecs] #7: <ed2a2ef4>, hrtimer_wakeup, S:01 # expires at 283716456168 nsecs [in 14186750072 nsecs] #8: <ed2a2ef4>, hrtimer_wakeup, S:01 # expires at 295789281627 nsecs [in 26259575531 nsecs] .expires_next : 269530000000 nsecs .hres_active : 1 .nr_events : 63228 .nohz_mode : 2 .idle_tick : 269527000000 nsecs .tick_stopped : 0 .idle_jiffies : 4294936823 .idle_calls : 217590 .idle_sleeps : 168323 .idle_entrytime : 269528785728 nsecs .idle_sleeptime : 230915526366 nsecs .last_jiffies : 4294936825 .next_jiffies : 4294936840 .idle_expires : 269543000000 nsecs jiffies: 4294936826 cpu: 1 clock 0: .index: 0 .resolution: 1 nsecs .get_time: ktime_get_real .offset: 1180214106093436428 nsecs active timers: clock 1: .index: 1 .resolution: 1 nsecs .get_time: ktime_get .offset: 0 nsecs active timers: #0: <ed2a2ef4>, tick_sched_timer, S:01 # expires at 269530250000 nsecs [in 543904 nsecs] #1: <ed2a2ef4>, it_real_fn, S:01 # expires at 269546379364 nsecs [in 16673268 nsecs] #2: <ed2a2ef4>, hrtimer_wakeup, S:01 # expires at 283723356553 nsecs [in 14193650457 nsecs] .expires_next : 269530250000 nsecs .hres_active : 1 .nr_events : 64947 .nohz_mode : 2 .idle_tick : 269527250000 nsecs .tick_stopped : 0 .idle_jiffies : 4294936824 .idle_calls : 172684 .idle_sleeps : 111081 .idle_entrytime : 269529298565 nsecs .idle_sleeptime : 234502295072 nsecs .last_jiffies : 4294936826 .next_jiffies : 4294936833 .idle_expires : 269536000000 nsecs jiffies: 4294936826 Tick Device: mode: 1 Clock Event Device: pit max_delta_ns: 27461866 min_delta_ns: 12571 mult: 5124677 shift: 32 mode: 3 next_event: 269530250000 nsecs set_next_event: pit_next_event set_mode: init_pit_timer event_handler: tick_handle_oneshot_broadcast tick_broadcast_mask: 00000003 tick_broadcast_oneshot_mask: 00000002 Tick Device: mode: 1 Clock Event Device: lapic max_delta_ns: 807031401 min_delta_ns: 1443 mult: 44643607 shift: 32 mode: 3 next_event: 269530000000 nsecs set_next_event: lapic_next_event set_mode: lapic_timer_setup event_handler: hrtimer_interrupt Tick Device: mode: 1 Clock Event Device: lapic max_delta_ns: 807031401 min_delta_ns: 1443 mult: 44643607 shift: 32 mode: 1 next_event: 269530250000 nsecs set_next_event: lapic_next_event set_mode: lapic_timer_setup event_handler: hrtimer_interrupt -- Thanks for the hints. Cheers. -- rncbc aka Rui Nuno Capela rncbc@...bc.org - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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