Re: Reg: Sample file creation for the event PC_CHANGE on ARMV6

[Jean P. <jp...@mv...>]

Hi,

Can you try with opcontrol -e to set the event before starting the trace?

I.e. I am using those commands - on ARMv7 though so you need to change the 
events to PC_CHANGE -:

opcontrol --reset
opcontrol --init
opcontrol --no-vmlinux
opcontrol -e OP_EXECUTED:200000:0:1:1 -e DCACHE_REFILL:200000:0:1:1
 -e CPU_CYCLES:100000:0:1:1 -e PC_BRANCH_MIS_PRED:100000:0:1:1 -e 
PC_WRITE:200000:0:1:1
opcontrol --start-daemon
opcontrol --start

opcontrol --dump
opcontrol --stop

opcontrol --shutdown
opcontrol --deinit

opreport -l

Regards,
Jean.

On Thursday 21 August 2008 13:09:36 Santhosh wrote:
> Hi ,
> No replied on this issue. Let me make clear my problem.  I am unable to
> generate sample files for the event "PC_CHANGE" on the ARMV6 - 1176
> platform. i followed below mentioned commands for the same.
>
> In installed oprofile 0.94  - userspace version also. but no luck. So it
> seems to be problem lies in kernel . 1.. Either PC_CHANGE event is not
> happening. (But program counter change event should occur more often). 2.
> hardware performance counters were not fine .
>
> If i pass module parameter timer as 1 "modprobe oprofile timer=1" , then i
> can able to capture PC_CHANGE event. 1. modprobe oprofile timer=1
> 2. opcontrol --init
> 3. opcontrol --no-vmlinux
> 4. opcontrol --start
> 5. run application executable file
> 6. opcontrol --dump
> 7. opcontrol --stop
> 8. opcontrol --shutdown
> 9. opreport -l
>
> So, after above mentioned commands, i can able to see the opreport output.
> So can any one throw their comments on this issue, please.
>
> Thanks
> Santhosh Kumar B
>
>
>
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>
> Hi ,
> When i execute the following command to capture the PC_CHANGE events
> through \ oprofile,
>
> 1. modprobe oprofile
> 2. opcontrol --start-daemon --vmlinux=/boot/vmlinux
> --event=PC_CHANGE:500:0:1:1 3. opcontrol --dump
> 4. opcontrol --stop
> 5. opcontrol --shutdown
> 6. opreport -l
>
> "opreport error: No sample file found: try running opcontrol --dump
> or specify a session containing sample files"
>
> I am getting "No sample file found"
>
>
> If i ran timer interrupt "modprobe oprofile timer=1" then i can able to
> capture.  \ What might be the reason for this ?
>
> FYI:
> http://www.cs.utk.edu/~vose/c-stuff/oprofile.html#timer
> In "/events/arm/armv6/events" file
> event:0x0d counters:0,1 um:zero minimum:500 name:PC_CHANGE : number of
> times the \ program counter was changed without a mode switch
>
>
> Please provide your inputs.
>
> Thanks & Regards,
> Santhosh Kumar B
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