[Xenomai-core] P2020 support for ftrace with ipipe 2.12-01 and xeno 2.5.5.1

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* [Xenomai-core] P2020 support for ftrace with ipipe 2.12-01 and xeno 2.5.5.1
@ 2011-09-23  7:58 Jean-Michel Hautbois
  2011-09-23  8:43 ` Gilles Chanteperdrix
  0 siblings, 1 reply; 9+ messages in thread
From: Jean-Michel Hautbois @ 2011-09-23  7:58 UTC (permalink / raw)
  To: Xenomai-core

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Hi List,

I am trying to use ftrace on a P2020 board, using the following :
- Linux 2.6.35-11
- Xenomai 2.5.5.1 (or 2.5.6, same problem)
- ipipe 2.12-01

I launch it using :
$> mkdir /tmp/debug
$> mount -t debugfs nodev /tmp/debug
$> cd /tmp/debug/tracing
$> echo function_graph > current_tracer

The last one fails (it hangs the CPU, I cannot do anything than hard reset).
Do you know what could cause that ?
As I can't have any trace, I don't really know how to go further, and before
using a BDI I would like to know if it is a known issue, as I could not find
anything related to this in the recent changes...

Thanks in advance for your help,
Regards,
JM

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^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [Xenomai-core] P2020 support for ftrace with ipipe 2.12-01 and xeno 2.5.5.1
  2011-09-23  7:58 [Xenomai-core] P2020 support for ftrace with ipipe 2.12-01 and xeno 2.5.5.1 Jean-Michel Hautbois
@ 2011-09-23  8:43 ` Gilles Chanteperdrix
  2011-09-23  9:21   ` Jean-Michel Hautbois
  0 siblings, 1 reply; 9+ messages in thread
From: Gilles Chanteperdrix @ 2011-09-23  8:43 UTC (permalink / raw)
  To: Jean-Michel Hautbois; +Cc: Xenomai-core

On 09/23/2011 09:58 AM, Jean-Michel Hautbois wrote:
> Hi List,
> 
> I am trying to use ftrace on a P2020 board, using the following :
> - Linux 2.6.35-11
> - Xenomai 2.5.5.1 (or 2.5.6, same problem)
> - ipipe 2.12-01
> 
> I launch it using :
> $> mkdir /tmp/debug
> $> mount -t debugfs nodev /tmp/debug
> $> cd /tmp/debug/tracing
> $> echo function_graph > current_tracer
> 
> The last one fails (it hangs the CPU, I cannot do anything than hard reset).
> Do you know what could cause that ?
> As I can't have any trace, I don't really know how to go further, and before
> using a BDI I would like to know if it is a known issue, as I could not find
> anything related to this in the recent changes...
> 
> Thanks in advance for your help,
> Regards,
> JM

Does the I-pipe tracer work?
See:
http://www.xenomai.org/index.php/I-pipe:Tracer


-- 
					    Gilles.


^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [Xenomai-core] P2020 support for ftrace with ipipe 2.12-01 and xeno 2.5.5.1
  2011-09-23  8:43 ` Gilles Chanteperdrix
@ 2011-09-23  9:21   ` Jean-Michel Hautbois
  2011-09-23  9:49     ` Jean-Michel Hautbois
  0 siblings, 1 reply; 9+ messages in thread
From: Jean-Michel Hautbois @ 2011-09-23  9:21 UTC (permalink / raw)
  To: Gilles Chanteperdrix; +Cc: Xenomai-core

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Yes, ipipe tracing works.
When it is the case, BTW, Here is the result of echoing a new tracer :

$>cat max
I-pipe worst-case tracing service on 2.6.35.11/ipipe-2.12-01
------------------------------
------------------------------
CPU: 0, Begin: 2593605556 cycles, Trace Points: 12 (-10/+5), Length: 268166
us
Calibrated minimum trace-point overhead: 0.023 us

 +----- Hard IRQs ('|': locked)
 |+---- <unused>
 ||+--- <unused>
 |||+-- Xenomai
 ||||+- Linux ('*': domain stalled, '+': current, '#': current+stalled)
 |||||                        +---------- Delay flag ('+': > 1 us, '!': > 10
us)
 |||||                        |        +- NMI noise ('N')
 |||||                        |        |
      Type    User Val.   Time    Delay  Function (Parent)
     #func                   0    0.039  ipipe_check_context+0x8
(tick_nohz_stop_sched_tick+0x31c)
 |   #begin   0x80000001     0    0.051  ipipe_check_context+0xf0
(tick_nohz_stop_sched_tick+0x31c)
 |   #end     0x80000001     0    0.039  ipipe_check_context+0xdc
(tick_nohz_stop_sched_tick+0x31c)
     #func                   0    0.039  __ipipe_unstall_root+0x8
(tick_nohz_stop_sched_tick+0x320)
 |   #begin   0x80000000     0    0.043  __ipipe_unstall_root+0xbc
(tick_nohz_stop_sched_tick+0x320)
 |   #func                   0    0.058  ipipe_check_context+0x8
(__ipipe_unstall_root+0x3c)
 |   +end     0x80000000     0    0.046  __ipipe_unstall_root+0xa8
(tick_nohz_stop_sched_tick+0x320)
     +func                   0    0.041  ipipe_suspend_domain+0x8
(cpu_idle+0xb0)
 |   +begin   0x80000001     0    0.060  ipipe_suspend_domain+0x1e0
(cpu_idle+0xb0)
 |   +end     0x80000001     0    0.043  ipipe_suspend_domain+0x220
(cpu_idle+0xb0)
>|   +begin   0x80000000     0! 2146.524  cpu_idle+0xe8 (rest_init+0x94)
:|   +func               268166    0.045  __ipipe_grab_timer+0x8
(__ipipe_ret_from_except+0x0)
:|   +begin   0x00000200 268166    0.046  __ipipe_grab_timer+0x84
(__ipipe_ret_from_except+0x0)
:|   +func               268166    0.060  __ipipe_dispatch_wired_nocheck+0x8
(__ipipe_grab_timer+0x138)
:|  # func               268166    0.054  xnintr_clock_handler+0x8
(__ipipe_dispatch_wired_nocheck+0x104)
:|  # func               268166    0.050  xntimer_tick_aperiodic+0x8
(xnintr_clock_handler+0xd0)
:|  # func               268166    0.060  xntimer_next_local_shot+0x8
(xntimer_tick_aperiodic+0x304)
:|  # func               268166    0.049  xnintr_host_tick+0x8
(xnintr_clock_handler+0x1f4)
:|  # func               268166    0.085  __ipipe_set_irq_pending+0x8
(xnintr_host_tick+0x94)
:|   +func               268166    0.065  __ipipe_walk_pipeline+0x8
(__ipipe_dispatch_wired_nocheck+0x148)
:|   +func               268166    0.061  __ipipe_sync_stage+0x8
(__ipipe_walk_pipeline+0x1a8)
<|   #end     0x80000000 268166    0.042  __ipipe_sync_stage+0x238
(__ipipe_walk_pipeline+0x1a8)
     #func               268166    0.042  irq_enter+0x8
(__ipipe_sync_stage+0x260)
     #func               268166    0.046  rcu_irq_enter+0x8 (irq_enter+0x38)
     #func               268167    0.043  idle_cpu+0x8 (irq_enter+0x44)
     #func               268167    0.039  ipipe_check_context+0x8
(irq_enter+0x84)
 |   #begin   0x80000001 268167    0.000  ipipe_check_context+0xf0
(irq_enter+0x84)


$>echo function_graph > current_tracer
[  275.698664] ------------[ cut here ]------------
[  275.755250] ------------[ cut here ]------------
[  275.810547] Kernel stack overflow in process dc6bf020, r1=dc838250
[  275.896276] Kernel panic - not syncing: kernel stack overflow
[  275.965200] Rebooting in 30 seconds..

2011/9/23 Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>

> On 09/23/2011 09:58 AM, Jean-Michel Hautbois wrote:
> > Hi List,
> >
> > I am trying to use ftrace on a P2020 board, using the following :
> > - Linux 2.6.35-11
> > - Xenomai 2.5.5.1 (or 2.5.6, same problem)
> > - ipipe 2.12-01
> >
> > I launch it using :
> > $> mkdir /tmp/debug
> > $> mount -t debugfs nodev /tmp/debug
> > $> cd /tmp/debug/tracing
> > $> echo function_graph > current_tracer
> >
> > The last one fails (it hangs the CPU, I cannot do anything than hard
> reset).
> > Do you know what could cause that ?
> > As I can't have any trace, I don't really know how to go further, and
> before
> > using a BDI I would like to know if it is a known issue, as I could not
> find
> > anything related to this in the recent changes...
> >
> > Thanks in advance for your help,
> > Regards,
> > JM
>
> Does the I-pipe tracer work?
> See:
> http://www.xenomai.org/index.php/I-pipe:Tracer
>
>
> --
>                                            Gilles.
>

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^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [Xenomai-core] P2020 support for ftrace with ipipe 2.12-01 and xeno 2.5.5.1
  2011-09-23  9:21   ` Jean-Michel Hautbois
@ 2011-09-23  9:49     ` Jean-Michel Hautbois
  2011-09-23 11:02       ` Gilles Chanteperdrix
  0 siblings, 1 reply; 9+ messages in thread
From: Jean-Michel Hautbois @ 2011-09-23  9:49 UTC (permalink / raw)
  To: Gilles Chanteperdrix; +Cc: Xenomai-core

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OK, I have more traces (a few :)) :

[   65.835519] Kernel BUG at c008c380 [verbose debug info unavailable]
[   65.910627] Oops: Exception in kernel mode, sig: 5 [#1]
[   65.973157] SMP NR_CPUS=2 P2020 GMEG
[   66.015908] last sysfs file: /sys/class/i2c-dev/i2c-1/dev
[   66.080519] Modules linked in:
[   66.117015] NIP: c008c380 LR: c008c380 CTR: c008c360
[   66.176420] REGS: dc71e460 TRAP: 0700   Tainted: G        W
(2.6.35.11)
[   66.258737] MSR: 00029000 <EE,ME,CE>  CR: 24448624  XER: 00000000
[   66.331761] TASK = dc6b8e70[184] 'bash' THREAD: dc71e000 CPU: 1
[   66.400551] GPR00: c0422da0 dc71e510 dc6b8e70 00000001 00000200 15f275c0
e1197000 c0425238
[   66.500726] GPR08: c0425240 c0455fe0 00000000 00000001 22448624 100f9d24
00002020 c0095624
[   66.600902] GPR16: c00a636c c00a60a8 c0445040 c042e8e0 ffffffff c045a6f0
00000200 dc747e7c
[   66.701078] GPR24: c043fa64 c0422d98 c0440000 c047dd40 c044809c c04473a4
c047dd40 dc71e510
[   66.803368] NIP [c008c380] __ipipe_dispatch_wired_nocheck+0x2c/0x26c
[   66.879443] LR [c008c380] __ipipe_dispatch_wired_nocheck+0x2c/0x26c
[   66.954466] Call Trace:
[   66.983656] [dc71e510] [c008c380]
__ipipe_dispatch_wired_nocheck+0x2c/0x26c (unreliable)
[   67.080604] [dc71e550] [c0017728] return_to_handler+0x0/0x34
(ret_from_except_full+0x0/0x4c)
[   67.181710] [dc71e580] [c0017728] return_to_handler+0x0/0x34
(__ipipe_grab_timer+0x138/0x1a0)
[   67.283867] --- Exception: 901 at __ipipe_unstall_root+0xac/0x100
[   67.283882]     LR = __ipipe_unstall_root+0xa8/0x100
[   67.416207] [dc71e660] [c0017728] return_to_handler+0x0/0x34
(__ipipe_ret_from_except+0x0/0xc)
[   67.519399] [dc71e680] [c00a5f64] ftrace_return_to_handler+0x74/0xd4
[   67.595485] [dc71e6b0] [c0017740] return_to_handler+0x18/0x34
[   67.664276] [dc71e6d0] [c0017728] return_to_handler+0x0/0x34
(trace_graph_return+0xbc/0xd4)
[   67.764342] [dc71e6f0] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   67.837306] [dc71e720] [c00176e4] ftrace_graph_caller+0x10/0x54
[   67.908180] [dc71e750] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0x144/0x16c)
[   68.009286] [dc71e770] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   68.082244] [dc71e7a0] [c00176e4] ftrace_graph_caller+0x10/0x54
[   68.153119] [dc71e7d0] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   68.253184] [dc71e7f0] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   68.326142] [dc71e820] [c00176e4] ftrace_graph_caller+0x10/0x54
[   68.397017] [dc71e850] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   68.497080] [dc71e870] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   68.570038] [dc71e8a0] [c00176e4] ftrace_graph_caller+0x10/0x54
[   68.640913] [dc71e8d0] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   68.740978] [dc71e8f0] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   68.813937] [dc71e920] [c00176e4] ftrace_graph_caller+0x10/0x54
[   68.884816] [dc71e950] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   68.984881] [dc71e970] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   69.057839] [dc71e9a0] [c00176e4] ftrace_graph_caller+0x10/0x54
[   69.128714] [dc71e9d0] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   69.228778] [dc71e9f0] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   69.301736] [dc71ea20] [c00176e4] ftrace_graph_caller+0x10/0x54
[   69.372611] [dc71ea50] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   69.472676] [dc71ea70] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   69.545634] [dc71eaa0] [c00176e4] ftrace_graph_caller+0x10/0x54
[   69.616509] [dc71ead0] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   69.716572] [dc71eaf0] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   69.789531] [dc71eb20] [c00176e4] ftrace_graph_caller+0x10/0x54
[   69.860405] [dc71eb50] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   69.960470] [dc71eb70] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   70.033429] [dc71eba0] [c00176e4] ftrace_graph_caller+0x10/0x54
[   70.104302] [dc71ebd0] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   70.204367] [dc71ebf0] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   70.277325] [dc71ec20] [c00176e4] ftrace_graph_caller+0x10/0x54
[   70.348200] [dc71ec50] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   70.448264] [dc71ec70] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   70.521223] [dc71eca0] [c00176e4] ftrace_graph_caller+0x10/0x54
[   70.592103] [dc71ecd0] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   70.692168] [dc71ecf0] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   70.765126] [dc71ed20] [c00176e4] ftrace_graph_caller+0x10/0x54
[   70.836001] [dc71ed50] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   70.936064] [dc71ed70] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   71.009024] [dc71eda0] [c00176e4] ftrace_graph_caller+0x10/0x54
[   71.079904] [dc71edd0] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   71.179969] [dc71edf0] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   71.252927] [dc71ee20] [c00176e4] ftrace_graph_caller+0x10/0x54
[   71.323802] [dc71ee50] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   71.423865] [dc71ee70] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   71.496825] [dc71eea0] [c00176e4] ftrace_graph_caller+0x10/0x54
[   71.567704] [dc71eed0] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   71.667769] [dc71eef0] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   71.740728] [dc71ef20] [c00176e4] ftrace_graph_caller+0x10/0x54
[   71.811602] [dc71ef50] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   71.911666] [dc71ef70] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   71.984625] [dc71efa0] [c00176e4] ftrace_graph_caller+0x10/0x54
[   72.055499] [dc71efd0] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   72.155564] [dc71eff0] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   72.228522] [dc71f020] [c00176e4] ftrace_graph_caller+0x10/0x54
[   72.299397] [dc71f050] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   72.399456] Instruction dump:
[   72.434911] 4e800020 7c0802a6 90010004 4bf8b2bd 9421ffc0 7c0802a6
90010044 bea10014
[   72.527782] 7c3f0b78 7c7e1b78 7c962378 4bffc20d <2f830000> 3f20c042
3b392d98 38190008
[   72.622742] I-pipe tracer log (100 points):
[   72.672766]      +func                    0 ipipe_trace_panic_freeze+0x8
(oops_enter+0x28)
[   72.771927]      +func                    0 oops_enter+0x8 (die+0x30)
[   72.849200]      +func                    0 die+0x8 (_exception+0xa4)
[   72.926473]      +func                    0 _exception+0x8
(program_check_exception+0x1e8)
[   73.025627]  |   +end     0x80000000      0 __ipipe_unstall_root+0xa8
(vprintk+0x348)
[   73.119567]  |   #func                    0 ipipe_check_context+0x8
(__ipipe_unstall_root+0x3c)
[   73.223916]  |   #begin   0x80000000      0 __ipipe_unstall_root+0xbc
(vprintk+0x348)
[   73.317848]      #func                    0 __ipipe_unstall_root+0x8
(vprintk+0x348)
[   73.410745]  |   #end     0x80000001      0 ipipe_check_context+0xdc
(vprintk+0x344)
[   73.503643]  |   #begin   0x80000001      0 ipipe_check_context+0xf0
(vprintk+0x344)
[   73.596535]      #func                    0 ipipe_check_context+0x8
(vprintk+0x344)
[   73.688391]      #func                    0
_raw_spin_unlock_irqrestore+0x8 (release_console_sem+0x11c)
[   73.801079]      #func                    0 __ipipe_spin_unlock_debug+0x8
(release_console_sem+0x110)
[   73.911691]      #func                    0
_raw_spin_unlock_irqrestore+0x8 (up+0x68)
[   74.005636]      #func                    0 __ipipe_spin_unlock_debug+0x8
(up+0x5c)
[   74.097492]  |   #end     0x80000001      0
__ipipe_test_and_stall_root+0xa8 (_raw_spin_lock_irqsave+0x28)
[   74.213318]  |   #begin   0x80000001      0
__ipipe_test_and_stall_root+0xb8 (_raw_spin_lock_irqsave+0x28)
[   74.329144]      #func                    0
__ipipe_test_and_stall_root+0x8 (_raw_spin_lock_irqsave+0x28)
[   74.443922]      #func                    0 _raw_spin_lock_irqsave+0x8
(up+0x28)
[   74.532653]      #func                   -1 up+0x8
(release_console_sem+0x108)
[   74.619301]  |   #end     0x80000001     -1
__ipipe_test_and_stall_root+0xa8 (_raw_spin_lock_irqsave+0x28)
[   74.735121]  |   #begin   0x80000001     -1
__ipipe_test_and_stall_root+0xb8 (_raw_spin_lock_irqsave+0x28)
[   74.850940]      #func                   -1
__ipipe_test_and_stall_root+0x8 (_raw_spin_lock_irqsave+0x28)
[   74.965718]      #func                   -1 _raw_spin_lock_irqsave+0x8
(release_console_sem+0x60)
[   75.072157]      #func                   -1 _call_console_drivers+0x8
(release_console_sem+0xbc)
[   75.177553]      #func                   -1 mem_serial_out+0x8
(serial8250_console_write+0xfc)
[   75.280880]      #func                   -1 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   75.372736]      #func                   -1 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   75.464593]      #func                   -1 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   75.556448]      #func                   -1 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   75.648304]      #func                   -1 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   75.740161]      #func                   -1 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   75.832011]      #func                   -2 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   75.923866]      #func                   -2 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   76.015722]      #func                   -2 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   76.107572]      #func                   -2 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   76.199428]      #func                   -2 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   76.291284]      #func                   -2 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   76.383134]      #func                   -2 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   76.474989]      #func                   -2 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   76.566846]      #func                   -3 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   76.658702]      #func                   -3 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   76.750552]      #func                   -3 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   76.842407]      #func                   -3 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   76.934264]      #func                   -3 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   77.026114]      #func                   -3 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   77.117969]      #func                   -3 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   77.209825]      #func                   -3 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   77.301682]      #func                   -3 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   77.393532]      #func                   -4 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   77.485387]      #func                   -4 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   77.577243]      #func                   -4 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   77.669094]      #func                   -4 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   77.760949]      #func                   -4 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   77.852805]      #func                   -4 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   77.944655]      #func                   -4 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   78.036511]      #func                   -4 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   78.128367]      #func                   -4 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   78.220217]      #func                   -5 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   78.312072]      #func                   -5 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   78.403929]      #func                   -5 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   78.495785]      #func                   -5 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   78.587641]      #func                   -5 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   78.679497]      #func                   -5 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   78.771347]      #func                   -5 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   78.863197]      #func                   -5 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   78.955052]      #func                   -5 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   79.046908]      #func                   -6 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   79.138765]      #func                   -6 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   79.230615]      #func                   -6 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   79.322470]      #func                   -6 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   79.414326]      #func                   -6 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   79.506176]      #func                   -6 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   79.598032]      #func                   -6 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   79.689882]      #func                   -6 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   79.781732]      #func                   -6 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   79.873587]      #func                   -7 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   79.965437]      #func                   -7 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   80.057287]      #func                   -7 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   80.149142]      #func                   -7 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   80.240999]      #func                   -7 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   80.332855]      #func                   -7 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   80.424705]      #func                   -7 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   80.516560]      #func                   -7 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   80.608417]      #func                   -7 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   80.700273]      #func                   -8 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   80.792123]      #func                   -8 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   80.883978]      #func                   -8 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   80.975835]      #func                   -8 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   81.067685]      #func                   -8 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   81.159540]      #func                   -8 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   81.251396]      #func                   -8 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   81.343246]      #func                   -8 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   81.435101]      #func                   -8 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   81.526958]      #func                   -9 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   81.618814]      #func                   -9 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   81.710664]      #func                   -9 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   81.802520]      #func                   -9 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   81.894376]      #func                   -9 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   81.986226]      #func                   -9 mem_serial_in+0x8
(wait_for_xmitr+0x64)
[   82.078103] Kernel panic - not syncing: Fatal exception in interrupt
[   82.154172] Call Trace:
[   82.183369] [dc71e230] [c0009d3c] show_stack+0x108/0x1c0 (unreliable)
[   82.260524] [dc71e280] [c0340af4] dump_stack+0x2c/0x44
[   82.322030] [dc71e290] [c0340bc4] panic+0xb8/0x138
[   82.379363] [dc71e2e0] [c0011184] die+0x13c/0x1fc
[   82.435655] [dc71e310] [c0011354] _exception+0xa4/0x118
[   82.498197] [dc71e400] [c00129e8] program_check_exception+0x1e8/0x774
[   82.575329] [dc71e450] [c0017728] return_to_handler+0x0/0x34
(ret_from_except_full+0x0/0x4c)
[   82.676445] --- Exception: 700 at
__ipipe_dispatch_wired_nocheck+0x2c/0x26c
[   82.676462]     LR = __ipipe_dispatch_wired_nocheck+0x2c/0x26c
[   82.829623] [dc71e550] [c0017728] return_to_handler+0x0/0x34
(__ipipe_grab_timer+0x138/0x1a0)
[   82.931776] [dc71e580] [c0017728] return_to_handler+0x0/0x34
(__ipipe_ret_from_except+0x0/0xc)
[   83.034976] --- Exception: 901 at __ipipe_unstall_root+0xac/0x100
[   83.034991]     LR = __ipipe_unstall_root+0xa8/0x100
[   83.167316] [dc71e660] [c0017728] return_to_handler+0x0/0x34
(trace_graph_return+0xbc/0xd4)
[   83.267386] [dc71e680] [c00a5f64] ftrace_return_to_handler+0x74/0xd4
[   83.343483] [dc71e6b0] [c0017740] return_to_handler+0x18/0x34
[   83.412286] [dc71e6d0] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0x144/0x16c)
[   83.513399] [dc71e6f0] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   83.586371] [dc71e720] [c00176e4] ftrace_graph_caller+0x10/0x54
[   83.657258] [dc71e750] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   83.757329] [dc71e770] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   83.830301] [dc71e7a0] [c00176e4] ftrace_graph_caller+0x10/0x54
[   83.901188] [dc71e7d0] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   84.001265] [dc71e7f0] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   84.074230] [dc71e820] [c00176e4] ftrace_graph_caller+0x10/0x54
[   84.145118] [dc71e850] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   84.245195] [dc71e870] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   84.318159] [dc71e8a0] [c00176e4] ftrace_graph_caller+0x10/0x54
[   84.389033] [dc71e8d0] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   84.489098] [dc71e8f0] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   84.562064] [dc71e920] [c00176e4] ftrace_graph_caller+0x10/0x54
[   84.632951] [dc71e950] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   84.733022] [dc71e970] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   84.805993] [dc71e9a0] [c00176e4] ftrace_graph_caller+0x10/0x54
[   84.876880] [dc71e9d0] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   84.976951] [dc71e9f0] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   85.049916] [dc71ea20] [c00176e4] ftrace_graph_caller+0x10/0x54
[   85.120790] [dc71ea50] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   85.220855] [dc71ea70] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   85.293820] [dc71eaa0] [c00176e4] ftrace_graph_caller+0x10/0x54
[   85.364707] [dc71ead0] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   85.464778] [dc71eaf0] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   85.537742] [dc71eb20] [c00176e4] ftrace_graph_caller+0x10/0x54
[   85.608617] [dc71eb50] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   85.708681] [dc71eb70] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   85.781647] [dc71eba0] [c00176e4] ftrace_graph_caller+0x10/0x54
[   85.852534] [dc71ebd0] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   85.952605] [dc71ebf0] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   86.025577] [dc71ec20] [c00176e4] ftrace_graph_caller+0x10/0x54
[   86.096464] [dc71ec50] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   86.196535] [dc71ec70] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   86.269506] [dc71eca0] [c00176e4] ftrace_graph_caller+0x10/0x54
[   86.340394] [dc71ecd0] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   86.440464] [dc71ecf0] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   86.513429] [dc71ed20] [c00176e4] ftrace_graph_caller+0x10/0x54
[   86.584303] [dc71ed50] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   86.684368] [dc71ed70] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   86.757333] [dc71eda0] [c00176e4] ftrace_graph_caller+0x10/0x54
[   86.828220] [dc71edd0] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   86.928291] [dc71edf0] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   87.001257] [dc71ee20] [c00176e4] ftrace_graph_caller+0x10/0x54
[   87.072137] [dc71ee50] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   87.172215] [dc71ee70] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   87.245179] [dc71eea0] [c00176e4] ftrace_graph_caller+0x10/0x54
[   87.316060] [dc71eed0] [c0017728] return_to_handler+0x0/0x34
(trace_graph_entry+0xa4/0x16c)
[   87.416124] [dc71eef0] [c001ac80] prepare_ftrace_return+0x74/0xb0
[   87.489090] [dc71ef20] [c00176e4] ftrace_graph_caller+0x10/0x54
[   87.559994] Rebooting in 30 seconds..
[  100.139790] Kernel stack overflow in process dc6b8e70, r1=dc71e260
[  100.215869] NIP: c000fed4 LR: c003c9a8 CTR: c003c91<1>[  100.270738Unable
to handle kernel paging request for unknown fault
[  100.272990] Unable to handle kernel paging request for instruction fetch
[  100.273287] Unable to handle kernel paging request for unknown fault
[  100.275392] Faulting instruction address: 0xc0231620
[  100.277251] Oops: Kernel access of bad area, sig: 11 [#2]
[  100.279083] SMP NR_CPUS=2 P2020 GMEG
[  100.280668] last sysfs file: /sys/class/i2c-dev/i2c-1/dev
[  100.282574] Modules linked in:
[  100.284012] NIP: c0231620 LR: c0231608 CTR: c000b8e4
[  100.285747] REGS: c04416f0 TRAP: c04417b0   Tainted: G      D W
(2.6.35.11)
[  100.288097] MSR: 00021000 <ME,CE>  CR: 24042082  XER: 20000000
[  100.291295] TASK = c042a3a0[0] 'swapper' THREAD: c0440000 CPU: 0
[  100.293547] GPR00: 0000270f c04417a0 c042a3a0 00000000 00000014 00000014
00000000 00010000
[  100.298204] GPR08: c0446ecc 00000000 00000000 c04417a0 24042084 100aa930
c038ddfc c0441b90
[  100.302861] GPR16: c0441b90 c00176e4 28444624 00000201 c0441c00 00000001
0000000f c0441eaf
[  100.307518] GPR24: c0441eaf 00008000 c038fe64 c045a750 c04417b0 00000000
c0441854 00000001
[  100.312554] NIP [c0231620] wait_for_xmitr+0x50/0x120
[  100.314389] LR [c0231608] wait_for_xmitr+0x38/0x120
[  100.316097] Call Trace:
[  100.317241] [c04417a0] [c0231634] wait_for_xmitr+0x64/0x120 (unreliable)
[  100.319988] Instruction dump:
[  100.321424] 8003000c 7c9c2378 38800005 7c0903a6 7c7e1b78 4e800421
881e00c7 546906fc
[  100.326303] 7d200378 981e00c7 3800270f 7c7d1b78 <901f0008> 48000034
801e000c 7c0903a6
[  100.331455] Kernel panic - not syncing: Fatal exception in interrupt
[  100.333608] Call Trace:
[  100.334752] [c04415e0] [c0009d3c] show_stack+0x108/0x1c0 (unreliable)
[  100.337552] [c0441630] [c0340af4] dump_stack+0x2c/0x44
[  100.339733] [c0441640] [c0340bc4] panic+0xb8/0x138
[  100.341815] [c0441690] [c0011184] die+0x13c/0x1fc
[  100.343874] [c04416c0] [c001bd0c] bad_page_fault+0x90/0xe0
[  100.346155] [c04416e0] [c0016df8] handle_page_fault+0x7c/0x80
[  100.348613] --- Exception: c04417b0 at wait_for_xmitr+0x50/0x120
[  100.350369]     LR = wait_for_xmitr+0x38/0x120
[  100.352081] [c04417a0] [c0231634] wait_for_xmitr+0x64/0x120 (unreliable)
[  100.355673] Rebooting in 30 seconds..
[  102.652340] Faulting instruction address: 0x00000000
[  102.713835] Oops: Kernel access of bad area, sig: 11 [#3]
[  102.778443] SMP NR_CPUS=2 P2020 GMEG
[  102.821195] last sysfs file: /sys/class/i2c-dev/i2c-1/dev
[  102.885807] Modules linked in:
[  102.922303] NIP: 00000000 LR: 00000000 CTR: c0340394
[  102.981707] REGS: c0441a80 TRAP: 0400   Tainted: G      D W
(2.6.35.11)
[  103.064024] MSR: 00029000 <EE,ME,CE>  CR: 28444682  XER: 00000000
[  103.137047] TASK = dc6b8e70[184] 'bash' THREAD: dc71e000 CPU: 1
[  103.205838] GPR00: 00000000 c0441b30 dc6b8e70 00000040 c0441b38 c038ddfc
c0441c38 c0446bb8
[  103.306020] GPR08: 00000001 c038de3c 00000000 c0441b30 28444622 100f9d24
0000000f c0441eaf
[  103.406196] GPR16: c0441eaf 00000000 c038fe64 10624dd3 c038ddfc c0350ec8
00000025 c0350000
[  103.506372] GPR24: c044b10c 00000020 c0350e80 c0441c38 c044b50c c042c158
24042080 c0441b60
[  103.608645] NIP [00000000] (null)
[  103.648252] LR [00000000] (null)
[  103.686816] Call Trace:
[  103.716001] Instruction dump:
[  103.751455] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
XXXXXXXX XXXXXXXX
[  103.844333] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
XXXXXXXX XXXXXXXX
[  103.937209] Kernel panic - not syncing: Fatal exception in interrupt

2011/9/23 Jean-Michel Hautbois <jhautbois@domain.hid>

> Yes, ipipe tracing works.
> When it is the case, BTW, Here is the result of echoing a new tracer :
>
> $>cat max
>
> I-pipe worst-case tracing service on 2.6.35.11/ipipe-2.12-01
> ------------------------------
> ------------------------------
> CPU: 0, Begin: 2593605556 cycles, Trace Points: 12 (-10/+5), Length: 268166
> us
> Calibrated minimum trace-point overhead: 0.023 us
>
>  +----- Hard IRQs ('|': locked)
>  |+---- <unused>
>  ||+--- <unused>
>  |||+-- Xenomai
>  ||||+- Linux ('*': domain stalled, '+': current, '#': current+stalled)
>  |||||                        +---------- Delay flag ('+': > 1 us, '!': >
> 10 us)
>  |||||                        |        +- NMI noise ('N')
>  |||||                        |        |
>       Type    User Val.   Time    Delay  Function (Parent)
>      #func                   0    0.039  ipipe_check_context+0x8
> (tick_nohz_stop_sched_tick+0x31c)
>  |   #begin   0x80000001     0    0.051  ipipe_check_context+0xf0
> (tick_nohz_stop_sched_tick+0x31c)
>  |   #end     0x80000001     0    0.039  ipipe_check_context+0xdc
> (tick_nohz_stop_sched_tick+0x31c)
>      #func                   0    0.039  __ipipe_unstall_root+0x8
> (tick_nohz_stop_sched_tick+0x320)
>  |   #begin   0x80000000     0    0.043  __ipipe_unstall_root+0xbc
> (tick_nohz_stop_sched_tick+0x320)
>  |   #func                   0    0.058  ipipe_check_context+0x8
> (__ipipe_unstall_root+0x3c)
>  |   +end     0x80000000     0    0.046  __ipipe_unstall_root+0xa8
> (tick_nohz_stop_sched_tick+0x320)
>      +func                   0    0.041  ipipe_suspend_domain+0x8
> (cpu_idle+0xb0)
>  |   +begin   0x80000001     0    0.060  ipipe_suspend_domain+0x1e0
> (cpu_idle+0xb0)
>  |   +end     0x80000001     0    0.043  ipipe_suspend_domain+0x220
> (cpu_idle+0xb0)
> >|   +begin   0x80000000     0! 2146.524  cpu_idle+0xe8 (rest_init+0x94)
> :|   +func               268166    0.045  __ipipe_grab_timer+0x8
> (__ipipe_ret_from_except+0x0)
> :|   +begin   0x00000200 268166    0.046  __ipipe_grab_timer+0x84
> (__ipipe_ret_from_except+0x0)
> :|   +func               268166    0.060
> __ipipe_dispatch_wired_nocheck+0x8 (__ipipe_grab_timer+0x138)
> :|  # func               268166    0.054  xnintr_clock_handler+0x8
> (__ipipe_dispatch_wired_nocheck+0x104)
> :|  # func               268166    0.050  xntimer_tick_aperiodic+0x8
> (xnintr_clock_handler+0xd0)
> :|  # func               268166    0.060  xntimer_next_local_shot+0x8
> (xntimer_tick_aperiodic+0x304)
> :|  # func               268166    0.049  xnintr_host_tick+0x8
> (xnintr_clock_handler+0x1f4)
> :|  # func               268166    0.085  __ipipe_set_irq_pending+0x8
> (xnintr_host_tick+0x94)
> :|   +func               268166    0.065  __ipipe_walk_pipeline+0x8
> (__ipipe_dispatch_wired_nocheck+0x148)
> :|   +func               268166    0.061  __ipipe_sync_stage+0x8
> (__ipipe_walk_pipeline+0x1a8)
> <|   #end     0x80000000 268166    0.042  __ipipe_sync_stage+0x238
> (__ipipe_walk_pipeline+0x1a8)
>      #func               268166    0.042  irq_enter+0x8
> (__ipipe_sync_stage+0x260)
>      #func               268166    0.046  rcu_irq_enter+0x8
> (irq_enter+0x38)
>      #func               268167    0.043  idle_cpu+0x8 (irq_enter+0x44)
>      #func               268167    0.039  ipipe_check_context+0x8
> (irq_enter+0x84)
>  |   #begin   0x80000001 268167    0.000  ipipe_check_context+0xf0
> (irq_enter+0x84)
>
>
> $>echo function_graph > current_tracer
> [  275.698664] ------------[ cut here ]------------
> [  275.755250] ------------[ cut here ]------------
> [  275.810547] Kernel stack overflow in process dc6bf020, r1=dc838250
> [  275.896276] Kernel panic - not syncing: kernel stack overflow
> [  275.965200] Rebooting in 30 seconds..
>
> 2011/9/23 Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
>
>> On 09/23/2011 09:58 AM, Jean-Michel Hautbois wrote:
>> > Hi List,
>> >
>> > I am trying to use ftrace on a P2020 board, using the following :
>> > - Linux 2.6.35-11
>> > - Xenomai 2.5.5.1 (or 2.5.6, same problem)
>> > - ipipe 2.12-01
>> >
>> > I launch it using :
>> > $> mkdir /tmp/debug
>> > $> mount -t debugfs nodev /tmp/debug
>> > $> cd /tmp/debug/tracing
>> > $> echo function_graph > current_tracer
>> >
>> > The last one fails (it hangs the CPU, I cannot do anything than hard
>> reset).
>> > Do you know what could cause that ?
>> > As I can't have any trace, I don't really know how to go further, and
>> before
>> > using a BDI I would like to know if it is a known issue, as I could not
>> find
>> > anything related to this in the recent changes...
>> >
>> > Thanks in advance for your help,
>> > Regards,
>> > JM
>>
>> Does the I-pipe tracer work?
>> See:
>> http://www.xenomai.org/index.php/I-pipe:Tracer
>>
>>
>> --
>>                                            Gilles.
>>
>
>

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^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [Xenomai-core] P2020 support for ftrace with ipipe 2.12-01 and xeno 2.5.5.1
  2011-09-23  9:49     ` Jean-Michel Hautbois
@ 2011-09-23 11:02       ` Gilles Chanteperdrix
  2011-09-23 13:58         ` Jean-Michel Hautbois
  0 siblings, 1 reply; 9+ messages in thread
From: Gilles Chanteperdrix @ 2011-09-23 11:02 UTC (permalink / raw)
  To: Jean-Michel Hautbois; +Cc: Xenomai-core

On 09/23/2011 11:49 AM, Jean-Michel Hautbois wrote:
> OK, I have more traces (a few :)) :

I meant the I-pipe tracer alone. The I-pipe tracer intead of other
ftrace tracers.


-- 
                                                                Gilles.


^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [Xenomai-core] P2020 support for ftrace with ipipe 2.12-01 and xeno 2.5.5.1
  2011-09-23 11:02       ` Gilles Chanteperdrix
@ 2011-09-23 13:58         ` Jean-Michel Hautbois
  2011-09-23 14:10           ` Jan Kiszka
  0 siblings, 1 reply; 9+ messages in thread
From: Jean-Michel Hautbois @ 2011-09-23 13:58 UTC (permalink / raw)
  To: Gilles Chanteperdrix; +Cc: Xenomai-core

[-- Attachment #1: Type: text/plain, Size: 440 bytes --]

2011/9/23 Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>

> On 09/23/2011 11:49 AM, Jean-Michel Hautbois wrote:
> > OK, I have more traces (a few :)) :
>
> I meant the I-pipe tracer alone. The I-pipe tracer intead of other
> ftrace tracers.
>
>
Well, I think it works, I can do a cat /proc/ipipe/trace/max without any
error in a kernel which doesn't have any other ftrace function.
Do you have one test in particular in mind ?

JM

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^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [Xenomai-core] P2020 support for ftrace with ipipe 2.12-01 and xeno 2.5.5.1
  2011-09-23 13:58         ` Jean-Michel Hautbois
@ 2011-09-23 14:10           ` Jan Kiszka
  2011-09-23 14:21             ` Jean-Michel Hautbois
  0 siblings, 1 reply; 9+ messages in thread
From: Jan Kiszka @ 2011-09-23 14:10 UTC (permalink / raw)
  To: Jean-Michel Hautbois; +Cc: Xenomai-core

On 2011-09-23 15:58, Jean-Michel Hautbois wrote:
> 2011/9/23 Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
> 
>> On 09/23/2011 11:49 AM, Jean-Michel Hautbois wrote:
>>> OK, I have more traces (a few :)) :
>>
>> I meant the I-pipe tracer alone. The I-pipe tracer intead of other
>> ftrace tracers.
>>
>>
> Well, I think it works, I can do a cat /proc/ipipe/trace/max without any
> error in a kernel which doesn't have any other ftrace function.
> Do you have one test in particular in mind ?

Check
http://git.kiszka.org/?p=ipipe.git;a=shortlog;h=refs/heads/queues/2.6.35-x86-trace
to get an impression of what is required to get ftrace working on
x86_64. It is not working on x86_32 e.g. as it depends on the arch
providing a NMI-safe, ie. task-stack independent current_thread_info().
That is also not yet the case on Power.

Jan

-- 
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux


^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [Xenomai-core] P2020 support for ftrace with ipipe 2.12-01 and xeno 2.5.5.1
  2011-09-23 14:10           ` Jan Kiszka
@ 2011-09-23 14:21             ` Jean-Michel Hautbois
  2011-09-23 14:29               ` Jan Kiszka
  0 siblings, 1 reply; 9+ messages in thread
From: Jean-Michel Hautbois @ 2011-09-23 14:21 UTC (permalink / raw)
  To: Jan Kiszka; +Cc: Xenomai-core

[-- Attachment #1: Type: text/plain, Size: 1085 bytes --]

2011/9/23 Jan Kiszka <jan.kiszka@domain.hid>

> On 2011-09-23 15:58, Jean-Michel Hautbois wrote:
> > 2011/9/23 Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
> >
> >> On 09/23/2011 11:49 AM, Jean-Michel Hautbois wrote:
> >>> OK, I have more traces (a few :)) :
> >>
> >> I meant the I-pipe tracer alone. The I-pipe tracer intead of other
> >> ftrace tracers.
> >>
> >>
> > Well, I think it works, I can do a cat /proc/ipipe/trace/max without any
> > error in a kernel which doesn't have any other ftrace function.
> > Do you have one test in particular in mind ?
>
> Check
>
> http://git.kiszka.org/?p=ipipe.git;a=shortlog;h=refs/heads/queues/2.6.35-x86-trace
> to get an impression of what is required to get ftrace working on
> x86_64. It is not working on x86_32 e.g. as it depends on the arch
> providing a NMI-safe, ie. task-stack independent current_thread_info().
> That is also not yet the case on Power.
>

Interesting, and impressive. Do you plan supporting it for PowerPC ?
Is there a git branch for that too ?
I can test on a P2020, if you are interested ;-).

JM

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^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [Xenomai-core] P2020 support for ftrace with ipipe 2.12-01 and xeno 2.5.5.1
  2011-09-23 14:21             ` Jean-Michel Hautbois
@ 2011-09-23 14:29               ` Jan Kiszka
  0 siblings, 0 replies; 9+ messages in thread
From: Jan Kiszka @ 2011-09-23 14:29 UTC (permalink / raw)
  To: Jean-Michel Hautbois; +Cc: Xenomai-core@domain.hid

On 2011-09-23 16:21, Jean-Michel Hautbois wrote:
> 2011/9/23 Jan Kiszka <jan.kiszka@domain.hid<mailto:jan.kiszka@domain.hid>>
> On 2011-09-23 15:58, Jean-Michel Hautbois wrote:
>> 2011/9/23 Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org<mailto:gilles.chanteperdrix@xenomai.org>>
>>
>>> On 09/23/2011 11:49 AM, Jean-Michel Hautbois wrote:
>>>> OK, I have more traces (a few :)) :
>>>
>>> I meant the I-pipe tracer alone. The I-pipe tracer intead of other
>>> ftrace tracers.
>>>
>>>
>> Well, I think it works, I can do a cat /proc/ipipe/trace/max without any
>> error in a kernel which doesn't have any other ftrace function.
>> Do you have one test in particular in mind ?
> 
> Check
> http://git.kiszka.org/?p=ipipe.git;a=shortlog;h=refs/heads/queues/2.6.35-x86-trace
> to get an impression of what is required to get ftrace working on
> x86_64. It is not working on x86_32 e.g. as it depends on the arch
> providing a NMI-safe, ie. task-stack independent current_thread_info().
> That is also not yet the case on Power.
> 
> Interesting, and impressive. Do you plan supporting it for PowerPC ?
> Is there a git branch for that too ?
> I can test on a P2020, if you are interested ;-).

Sorry, this is currently not on any local roadmap.

Jan

-- 
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux


^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2011-09-23 14:29 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2011-09-23  7:58 [Xenomai-core] P2020 support for ftrace with ipipe 2.12-01 and xeno 2.5.5.1 Jean-Michel Hautbois
2011-09-23  8:43 ` Gilles Chanteperdrix
2011-09-23  9:21   ` Jean-Michel Hautbois
2011-09-23  9:49     ` Jean-Michel Hautbois
2011-09-23 11:02       ` Gilles Chanteperdrix
2011-09-23 13:58         ` Jean-Michel Hautbois
2011-09-23 14:10           ` Jan Kiszka
2011-09-23 14:21             ` Jean-Michel Hautbois
2011-09-23 14:29               ` Jan Kiszka

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