Re: Ask help for oprofile

On 02/10/2015 03:29 AM, SHENG Jason wrote:
> Hi Cohen,
> 
>  
> 
> From the oprpfile webpage, I found you are the current maintainers and primary contributes. And I found your mail address in webpage too. During use the oprofile on my own board, I hit an error, searched in internet, but no more help. Could you give me a hand? The following is the detailed information.
> 
>  
> 
> My board uses a ARM cpu, arm1176s. I used the cross-compile tool built out the oprofile tools and ship to my board with supported files, such as (events, unit_masks).
> 
> But when I start the “opcontrol”, it hit the following error. I searched the source code, the error message was printed in function check_unit_mask(), could you please give me a hand? Let the opcontrol can be run on my board.
> 
>  
> 
> ~/oprofile/bin #
> 
> ~/oprofile/bin # ./opcontrol --start
> 
> mandatory um zero doesn't contain exactly one entry (arm/armv6)
> 
> Using default event: CPU_CYCLES:100000:0:1:1
> 
> mandatory um zero doesn't contain exactly one entry (arm/armv6)
> 
> ~/oprofile/bin #
> 
> ~/oprofile/bin #
> 
> ~/oprofile/bin # ./opcontrol --setup --event=CPU_CYCLES:1000:0:0:1 --session-dir=/home/opt
> 
> mandatory um zero doesn't contain exactly one entry (arm/armv6)
> 
> ~/oprofile/bin #
> 
> ~/oprofile/bin #
> 
>  
> 
> Thanks,
> 
> Jason
> 
>  
> 


Hi Jason,

I am including the oprofile mailing list because others might come across the same problem.

I tried a similar experiment with oprofile-0.9.9 on a "ARM Cortex-A9" which should have similar event. It doesn't appear to have that problem:

[wcohen@wecf19arm ~]$ ophelp -d
CPU_CYCLES:100000:0:1:1
[wcohen@wecf19arm ~]$ sudo opcontrol --start --no-vmlinux
ATTENTION: Use of opcontrol is discouraged.  Please see the man page for operf.
Using default event: CPU_CYCLES:100000:0:1:1
Using 2.6+ OProfile kernel interface.
Using log file /var/lib/oprofile/samples/oprofiled.log
Daemon started.
Profiler running.


What version of OProfile are you using?  Also could you attach the events/arm/armv6/events and events/arm/armv6/unit_masks files from the version of oprofile you are using?

-Will

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