Re: Using sysprof with 64bits linux

[Jean-Marc Lasgouttes <lasgouttes lyx org>]

Le 06/05/2017 à 22:21, Christian Hergert a écrit :
> > I have tried both the old style version on my antique unbuntu 12.04 and
> > the new 3.34.1 on ubuntu 17.10. On this last one, the capture stored here
> >   http://www-rocq.inria.fr/~lasgoutt/sysprof-lyx.png
> > shows the kind of result that I obtain when looking at the src/lyx
> > process. I doubt that all the action happens in some weird kernel
> > function...
>
> Can you try recording with `sudo perf record` and then display the
> recording with `sudo perf report`? I'm curious if you get different
> output than we are displaying. If so, we definitely need to investigate
> a bug. If not, we need to improve kernel perf :)

I have done that (keeping the -O2 optimization level). The perf report 
-g output is reasonable:
 http://www-rocq.inria.fr/~lasgoutt/perf-record.png

What shall I do from there (other than switching to perf, of course :)?

JMarc