Re: opreport error

[Maynard J. <may...@us...>]

chandraiah gobburu wrote:
> Hi
> 
> I am getting the following error with opreport. I have run the following
> commands on the ARM target board.
> opcontrol --setup --no-vmlinux
Be sure to do 'opcontrol --reset' before a --start.
> opcontrol --session-dir=/home/temp --start
> .....
> I have run some applications in between
> .............
> opcontrol --session-dir=/home/temp --stop
> 
> opcontrol --session-dir=/home/temp --dump
> 
> opreport --session-dir=/home/temp
> 
> I am getting the following error after running the last command
> 
> opreport error: Invalid sample file, bad magic number:
> /home/sekhar/samples/current/{root}/bin/busybox/{dep}/{kern}/no-vmlinux/TIMER.0.0.1025.0
"/home/sekhar"? opreport seems to be using the wrong session-dir.  This is may be due to a recently reported bug:
(https://sourceforge.net/tracker/?func=detail&aid=2646398&group_id=16191&atid=116191)
This was fixed in oprofile CVS on May 13.  But if you don't absolutely *need* to use session-dir, I would recommend not using it and letting oprofile store the samples in the default location.  Then you don't need to include it on every command.  Either way, I suggest re-init'ing your environment as follows:
  1. opcontrol --deinit (this may fail with a "device busy" error, in which case you need to add the above --session-dir option to the deinit)
  2. rm /root/.oprofile/daemonrc
  3. rm -rf /var/lib/oprofile/samples/current (as well as any other dirs you've tried to use as session-dir)

-Maynard
  
> 
> It would be great if somebody suggests me the reason behind this error.
> 
> 
> 
> 
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