On Mon, Feb 24, 2025 at 9:54 AM Devin Heitmueller < devin.heitmuel...@ltnglobal.com> wrote:
> On Mon, Feb 24, 2025 at 9:43 AM Cesar Matheus > <cesar.math...@telecom-paris.fr> wrote: > > > > Hi, I'm a CS student working on an optimisation of the ebur128 filter. > First I'm looking for the nicest way to get information on code performance. > > I saw that the configuration flag "--enable-linux-perf" enables > Linux Performance Monitor API, I've been using the perf tool with the > following commands for example : > > > > ./perf record -F 99 -a -g --call-graph dwarf ./ffmpeg -i test.wav -vn > -af loudnorm=print_format=summary:dual_mono=true -f null /dev/null > > > > but I'm not quite satisfate with the result. > > > > Do you have any advice on how to properly extract informations such as > execution time, function call graph etc.. in such a case using profiling > tool (perf or gprof for example ? > > I've had excellent success with Intel VTune, which while not open > source is freely available: > > > https://www.intel.com/content/www/us/en/developer/tools/oneapi/vtune-profiler.html#gs.k0kfve AMD equivalent, though not nearly as nice as VTune imo. https://www.amd.com/en/developer/uprof.html <https://www.intel.com/content/www/us/en/developer/tools/oneapi/vtune-profiler.html#gs.k0kfve> > > Function call timing, memory bandwidth utilization (if on an Intel > CPU), cache analysis, and very easy to get up and running. The hard > part is understanding the results, but the GUI makes that *much* > easier than any command line perf based solution. > > But yeah, as Kieran pointed out, for any of these solutions you should > be using the version of the ffmpeg binary that contains debug info. > > Devin > > -- > Devin Heitmueller, Senior Software Engineer > LTN Global Communications > o: +1 (301) 363-1001 > w: https://ltnglobal.com e: devin.heitmuel...@ltnglobal.com > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". > _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
