D23114: [perf] Introduce ftrace marker

[Roman Gilg]

romangg created this revision.
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REVISION SUMMARY
  Adds a class for ftrace marking program flow of KWin. This used in conjunction
  with a tool like GPUvis can be very powerful.
  
  I use it at the moment for analyzing the compositing behavior of KWin on X11.
  For this I also apply a patch to the XServer adding the same capability[1].
  
  Besides the class also some marking points have been added. Ftracing can be,
  if it has been built into the binary, activated via D-Bus.
  
  [1] https://gitlab.freedesktop.org/xorg/xserver/merge_requests/209

REPOSITORY
  R108 KWin

BRANCH
  ftraceMarker

REVISION DETAIL
  https://phabricator.kde.org/D23114

AFFECTED FILES
  CMakeLists.txt
  composite.cpp
  config-kwin.h.cmake
  data/org_kde_kwin.categories
  dbusinterface.cpp
  dbusinterface.h
  helpers/perf/ftrace_marker.cpp
  helpers/perf/ftrace_marker.h
  main.cpp
  org.kde.KWin.xml
  perf.cpp
  perf.h
  utils.cpp
  utils.h
  workspace.cpp

To: romangg, #kwin
Cc: kwin, LeGast00n, sbergeron, jraleigh, fbampaloukas, GB_2, mkulinski, ragreen, jackyalcine, Pitel, iodelay, crozbo, bwowk, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, hardening, romangg, jensreuterberg, abetts, sebas, apol, mart
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