Yeoh Chun Yeow wrote:
> Dear Jan,
>
> Attach the ipipe frozen trace.
>
> Please advice. Thanks
>
> Regards,
> Chun Yeow
>
> On 9/4/07, Jan Kiszka <[EMAIL PROTECTED]> wrote:
>> Yeoh Chun Yeow wrote:
>>> Hi, Jan
>>>
>>> Any ideas on this?
>>>
>>> I-pipe frozen back-tracing service on 2.6.16.21-xenomai/ipipe-1.5-02
>>> ------------------------------------------------------------
>>>
>>> ******** WARNING ********
>>> The following debugging options will increase the observed latencies:
>>> o CONFIG_DEBUG_PREEMPT
>>>
>>> Freeze: 3525267255803 cycles, Trace Points: 30 (+10)
>>>
>>> +--------------- Hard IRQs ('|': locked)
>>> | +- Delay flag ('+': > 1 us, '!': > 10 us)
>>> | |
>>> Type Time Function (Parent)
>>> : func -5 _call_console_drivers (release_console_sem)
>>> : func -4 __ipipe_restore_root (release_console_sem)
>>> : func -4 __ipipe_unstall_root (__ipipe_restore_root)
>>> :|begin -4 __ipipe_unstall_root (__ipipe_restore_root)
>>> :|end -4 __ipipe_unstall_root (__ipipe_restore_root)
>>> : func -4 __ipipe_test_and_stall_root (release_console_sem)
>>> : func -4 add_preempt_count (release_console_sem)
>>> : func -4 __ipipe_restore_root (release_console_sem)
>>> : func -3 __ipipe_unstall_root (__ipipe_restore_root)
>>> :|begin -3 __ipipe_unstall_root (__ipipe_restore_root)
>>> :|end -3 __ipipe_unstall_root (__ipipe_restore_root)
>>> : func -3 sub_preempt_count (release_console_sem)
>>> : func -3 sub_preempt_count (vprintk)
>>> : func -2 kmem_cache_alloc (tdma_ioctl)
>>> : func -2 __ipipe_test_and_stall_root (kmem_cache_alloc)
>>> : func -2 debug_smp_processor_id (kmem_cache_alloc)
>>> : func -2 __ipipe_test_root (debug_smp_processor_id)
>>> : func -2 __ipipe_restore_root (kmem_cache_alloc)
>>> : func -2 __ipipe_unstall_root (__ipipe_restore_root)
>>> :|begin -1 __ipipe_unstall_root (__ipipe_restore_root)
>>> :|end -1 __ipipe_unstall_root (__ipipe_restore_root)
>>> : func -1 __kmalloc (tdma_ioctl)
>>> : func -1 __ipipe_test_and_stall_root (__kmalloc)
>>> : func -1 debug_smp_processor_id (__kmalloc)
>>> : func 0 __ipipe_test_root (debug_smp_processor_id)
>>> : func 0 __ipipe_restore_root (__kmalloc)
>>> : func 0 __ipipe_unstall_root (__ipipe_restore_root)
>>> :|begin 0 __ipipe_unstall_root (__ipipe_restore_root)
>>> :|end 0 __ipipe_unstall_root (__ipipe_restore_root)
>>> < freeze 0 tdma_ioctl (rtnet_ioctl)
>>> func 0 rtnet_rtpc_dispatch_call (tdma_ioctl)
>>> func 0 __kmalloc (rtnet_rtpc_dispatch_call)
>>> func 1 __ipipe_test_and_stall_root (__kmalloc)
>>> func 1 debug_smp_processor_id (__kmalloc)
>>> func 1 __ipipe_test_root (debug_smp_processor_id)
>>> func 1 __ipipe_restore_root (__kmalloc)
>>> func 1 __ipipe_unstall_root (__ipipe_restore_root)
>>> |begin 2 __ipipe_unstall_root (__ipipe_restore_root)
>>> |end 2 __ipipe_unstall_root (__ipipe_restore_root)
>>> |begin 2 rtnet_rtpc_dispatch_call (tdma_ioctl)
>>>
>> |
>> |
>> \|/
>>
>> ...and here comes the interesting part, ie. what happens after the
>> calibration started. Please increase /proc/ipipe/trace/back_trace_pointsGrmbl, sorry, my bad: post_trace_points, that's the right knob here. Jan
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