I-pipe worst-case tracing service on 2.6.20/ipipe-1.8-06
------------------------------------------------------------

******** WARNING ********
The following debugging options will increase the observed latencies:
 o CONFIG_XENO_OPT_DEBUG

Begin: 190142984429 cycles, Trace Points: 21 (-10/+1), Length: 63 us
Calibrated minimum trace-point overhead: 0.248 us

 +--------------- Hard IRQs ('|': locked)
 |             +- Delay flag ('+': > 1 us, '!': > 10 us)
 |             |
  Type     Time   Function (Parent)
  func       -5   ipipe_check_context (dev_hard_start_xmit)
  func       -4   skb_clone (dev_hard_start_xmit)
  func       -4   kmem_cache_alloc (skb_clone)
  func       -4   ipipe_check_context (kmem_cache_alloc)
  func       -3   __ipipe_restore_root (kmem_cache_alloc)
  func       -3   __ipipe_unstall_root (__ipipe_restore_root)
 |begin      -3   __ipipe_unstall_root (__ipipe_restore_root)
 |end        -2   __ipipe_unstall_root (__ipipe_restore_root)
  func       -2   packet_rcv_spkt (dev_hard_start_xmit)
  func       -1   strlcpy (packet_rcv_spkt)
>|begin       0   common_interrupt (__ipipe_trace)
:|func        0   __ipipe_handle_irq (common_interrupt)
:|func        0   __ipipe_ack_irq (__ipipe_handle_irq)
:|func        1   __ipipe_ack_level_irq (__ipipe_ack_irq)
:|func        1   mask_and_ack_8259A (__ipipe_ack_level_irq)
:|func        1!  __ipipe_spin_lock_irqsave (mask_and_ack_8259A)
:|func       29   __ipipe_spin_unlock_irqrestore (mask_and_ack_8259A)
:|func       29   __ipipe_dispatch_wired (__ipipe_handle_irq)
:|func       29   xnintr_clock_handler (__ipipe_dispatch_wired)
:|func       30   xnintr_irq_handler (xnintr_clock_handler)
:|func       30   xnpod_announce_tick (xnintr_irq_handler)
:|func       30   xntimer_do_tick_aperiodic (xnpod_announce_tick)
:|func       31   xnthread_periodic_handler (xntimer_do_tick_aperiodic)
:|func       31   xnpod_resume_thread (xnthread_periodic_handler)
:|[ 3813]    32!  xnpod_resume_thread (xnthread_periodic_handler)
:|func       60   xnpod_schedule (xnintr_irq_handler)
:|[ 3391]    60+  xnpod_schedule (xnintr_irq_handler)
:|func       62   __switch_to (xnpod_schedule)
:|[ 3813]    62   xnpod_schedule (xnpod_suspend_thread)
:|func       63   __ipipe_restore_pipeline_head (xnpod_wait_thread_period)
<|end        63   __ipipe_restore_pipeline_head (xnpod_wait_thread_period)
 |begin      64   __ipipe_dispatch_event (__ipipe_syscall_root)