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
[email protected]
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