Understanding timestamps in perf.data

[Dennis Gnad <dennis.gnad@kit.edu>]

Hi,

I am interested in timestamped performance counter data (with a 
specified sampling rate) as there is supposed to be saved in perf.data 
when I use "perf record -T".

However, I don't understand the complete output of "perf report -D", and 
can't figure out which parts of it are the timestamps. Is there any 
documentation that I overlooked?

Actually if it helps, I am only interested in the name/raw event, value, 
and timestamp, without any code/library information. Maybe the 
information on which CPU it is from (on a multicore) could be 
interesting as well.

Do I need to start looking into the code? Any good place to start? I 
probably need to do this anyway, instead of parsing the really large 
perf report -D output.

Thanks for your help and best regards,
Dennis