Re: When is TSTAMP==0?

[Vladimir Mezentsev]

On 6/1/23 14:19, Peter Kessler OS via Gprofng-gui-devel wrote:

When does gprofng start counting time for TSTAMP filters?

    0 — the beginning of the experiment.

I have a program that reports the times at which certain program phases start and stop.  Is there a way to coordinate those program times with the TSTAMP filters available in gprofng? 

    TSTAMP is in nanoseconds.
    For example, to see experiment between 1 and 2 seconds:
       gprofng display text  -filter '(TSTAMP > 100000000) &&
    (TSTAMP < 200000000)' -func  test.1.er
    
    
    If you use gprofng-gui:
      go to the 'Timeline' view.
      Select time range
      Right click
      Select filter.
    
    
    Point mouse on the filter (lower left corner). You will see the
    current filter. This filter you can use in `gprofng display text
    -filter`
    
    
    -Vladimir

 

I see, for example, "Start Time    : Wed May 31 12:27:02 2023" in the experiment overview, but that doesn't have nearly the resolution I think I need to write accurate TSTAMP filters.  Maybe this is a feature request: Could the overview print out the Unix epoch time (e.g., milliseconds since of TSTAMP==0?  Then I could use Unix epoch time available in my application to find values to put in gprofng filters.

 

Thanks for considering this request.

 

                                                ... peter