[Rivet] stopwatch feature for timing tests?

[David Bjergaard]

Is there a reason the standard profiling tools don't work?
$ time rivet

Other alternatives:
http://fa.bianp.net/blog/2011/a-profiler-for-python-extensions/
http://gernotklingler.com/blog/gprof-valgrind-gperftools-evaluation-tools-application-level-cpu-profiling-linux/

It would be nice if there were a prescription on the Rivet wiki for how to
profile analyses since it isn't as straight forward as a traditional C++
program.

    David

Raghav Kunnawalkam Elayavalli <raghav.k.e at cern.ch> writes:

> Yeah i want to internally check the timing of certain methods i have
> that get called during run time. 
>
> liking with root works and the timing is pretty accurate from both
> cases 
> rivet-buildplugin RivetAnalysis.so Analysis.cc -lRecursiveTools $
> (root-config --cflags --libs)
>
> finished: Time from root TStopwatch 
> CPU time (min) = 0.484667
> Real time (min) = 0.487455
>
> Rivet run completed at 2016-06-28 17:31:56, time elapsed = 0:00:29
>
> Cheers
> Raghav
>
>     On Jun 28, 2016, at 5:25 PM, Andy Buckley <a.g.buckley at gmail.com>
>     wrote:
>
>     
>     
>     On 28/06/16 16:18, Raghav Kunnawalkam Elayavalli wrote:
>     
>     Hi Rivet experts,
>         
>         I would like to optimize an analysis of mine for which i need
>         the help of something like the TStopwatch feature. I assume i
>         can use that from root itself, pointing to the rootcxxflags
>         during compilation, but i wanted to know if Rivet has
>         something like that. I cant find a timer class in the
>         documentation. but in know its there since you printout the
>         time elapsed.
>         
>
>     I guess it's ok to link against ROOT like you say. With the usual
>     caveats about accuracy of such timing tests.
>     
>     The timing that we write out is just in the script layer, using
>     Python's datetime module. It gives overall timing rather than
>     per-component. At a simpler level you could just run it through
>     the "time" shell command, but I guess you want to do some internal
>     profiling? Maybe worth looking into valgrind, gprof, or perf for
>     that.
>     
>     Andy
>     
>     -- 
>     Dr Andy Buckley, Lecturer / Royal Society University Research
>     Fellow
>     Particle Physics Expt Group, University of Glasgow
>     
>
>
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