Re: No sample file

[John F. <jo...@so...>]

John Faith wrote:
> Jean Pihet wrote:
>> Hi,
>>
>> On Tuesday 30 June 2009 18:22:43 John Faith wrote:
>>>> # opcontrol --reset
>>>> oprofile: using arm/armv7
>>>>       
>> It looks like you do not have support for ARMv7 oprofile in the 
>> kernel, or the
>> oprofile.ko module is not loaded. Cf. below.
>>
>>  
>>> I get no output from --reset, except when the daemon is running, I get
>>> "Signalling daemon".  Could this point to a misconfiguration problem?
Hi Jean,

After rebuilding the kernel, I did see "oprofile: using arm/armv7" from 
dmesg, but missed it in my non-console telnet window before.

>>>
>>>     ...
>>>> # cat /proc/interrupts
>>>>            CPU0
>>>>   3:      32658        INTC  CP15 PMNC
>>>>  11:          0        INTC  prcm
>>>>  12:          0        INTC  DMA
>>>>  25:          2        INTC  OMAP2 Display
>>>>  37:      18662        INTC  gp timer
>>>>  56:        292        INTC  i2c_omap
>>>>  57:          0        INTC  i2c_omap
>>>>  61:          0        INTC  i2c_omap
>>>>  72:      93393        INTC  serial
>>>> 162:          0        GPIO  ads7846
>>>> 166:      64814        GPIO  eth0
>>>> 369:          0           -  TWL4030 Keypad
>>>> 373:          0           -  twl4030_usb
>>>> Err:          0
>>>>       
>>> I get:
>>> # cat /proc/interrupts
>>>            CPU0
>>>  11:          0        INTC  prcm
>>>  12:         43        INTC  DMA
>>>  21:    1288205        INTC  SGX ISR
>>>  24:          0        INTC  Omap 3 Camera ISP
>>>  25:          0        INTC  OMAP DSS
>>>  37:     414036        INTC  gp timer
>>>  56:        198        INTC  i2c_omap
>>>  57:          0        INTC  i2c_omap
>>>  61:          0        INTC  i2c_omap
>>>  72:        432        INTC  serial idle, serial
>>>  73:          3        INTC  serial idle, serial
>>>  74:          2        INTC  serial idle, serial
>>>  77:          0        INTC  ehci_hcd:usb2
>>>  83:        156        INTC  mmc0
>>>  92:       1877        INTC  musb_hdrc
>>>  93:          0        INTC  musb_hdrc
>>> 335:          0        GPIO  ads7846
>>> 336:      19257        GPIO  eth0
>>> 369:          3     twl4030  twl4030_keypad
>>> 379:          0     twl4030  rtc0
>>> 384:          0     twl4030  mmc0
>>>     
>> You should have a line for the PMNC irq. Is oprofile enabled in your 
>> kernel?
>> Is the oprofile module loaded?
>> ...
>
> I saw no oprofile errors in dmesg indicating that the interrupt could 
> not be obtained on boot, so maybe enabling DEBUG in 
> arch/arm/oprofile/op_model_v7.c might help.  BTW, the kernel version 
> is 2.6.29-rc3-omap1.
>
After the rebuild, I do get see the interrupt listed when profiling:
# cat /proc/interrupts | grep PMNC
  3:       1655        INTC  CP15 PMNC

Enabling register dump with DEBUG in op_model_v7.c gives:

PMNC registers dump:
<6>PMNC  =0x41002008
PMNC  =0x41002008
<6>CNTENS=0x80000003
CNTENS=0x80000003
<6>INTENS=0x80000003
INTENS=0x80000003
<6>FLAGS =0x00000000
FLAGS =0x00000000
<6>SELECT=0x00000001
SELECT=0x00000001
<6>CCNT  =0xfff0bdc0
CCNT  =0xfff0bdc0
<6>CNT[0] count =0xfffcf2c0
CNT[0] count =0xfffcf2c0
<6>CNT[0] evtsel=0x00000055
CNT[0] evtsel=0x00000055
<6>CNT[1] count =0xfffcf2c0
CNT[1] count =0xfffcf2c0
<6>CNT[1] evtsel=0x00000003
CNT[1] evtsel=0x00000003
<6>CNT[2] count =0x00000000
CNT[2] count =0x00000000
<6>CNT[2] evtsel=0x00000000
CNT[2] evtsel=0x00000000
<6>CNT[3] count =0x00000000
CNT[3] count =0x00000000
<6>CNT[3] evtsel=0x00000000
CNT[3] evtsel=0x00000000

I wonder if it's something simpler like permissions?  Sample dump files 
should end up in var/lib/oprofile/samples/current/, right?

Thanks,
John