On Mon, 17 Dec 2007, Parag Warudkar wrote:
> On Dec 17, 2007 3:05 AM, Thomas Gleixner <[email protected]> wrote:
> > Sigh. You did not have the debug patch applied anymore, which printks
> > the timer_list data ? Can you apply it again and provide the output
> > please ?
> >
>
> This keeps getting more and more weird - This time I was running with
> CONFIG_CPU_IDLE=N and I have ton of soft lockups after 14hr uptime.
It's more than weird.
> now at 39080147128907 nsecs
> .idle_entrytime : 39080384013047 nsecs
The time, when we entered idle on CPU#0 is in the future.
> .tick_stopped : 0
But the tick is not stopped, that means CPU#0 has work to do
On CPU#1 idle entry just happened:
> .idle_entrytime : 39079996603653 nsecs
> now at 40490254040892 nsecs
> .idle_entrytime : 40490492012833 nsecs
Again, idle_entry on CPU#0 is in the future.
On CPU#1 the idle entry was at:
> .idle_entrytime : 40489996578090 nsecs
which means: 0.257462802 sec. ago
> now at 40700144217096 nsecs
Aarg. On CPU#0 this is consistently in the future:
> .idle_entrytime : 40700372012887 nsecs
I'm really confused.
> .idle_entrytime : 40699996620694 nsecs
> .idle_sleeptime : 40540536046589 nsecs
> .last_jiffies : 10100000
> .next_jiffies : 10100467
> .idle_expires : 40701864000000 nsecs
> jiffies: 10100158
>
>
> Tick Device: mode: 1
> Clock Event Device: hpet
> max_delta_ns: 2147483647
> min_delta_ns: 3352
> mult: 61496110
> shift: 32
> mode: 3
> next_event: 40700692000000 nsecs
> set_next_event: hpet_legacy_next_event
> set_mode: hpet_legacy_set_mode
> event_handler: tick_handle_oneshot_broadcast
> tick_broadcast_mask: 00000003
Here is the next inconsistent data:
> tick_broadcast_oneshot_mask: 00000003
CPU#1 just woke up. That means the broadcast oneshot mask must be
cleared for CPU#1.
Some real strange thing is going on in your box.
I try to come up with some more debug patches tomorrow.
tglx
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