[Mesa-dev] [Bug 87886] constant fps drops with Intel and Radeon on Source games

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87886

--- Comment #17 from Stéphane Travostino <stephane.travostino at gmail.com> ---
Status as of Linux 3.19-rc3, mesa HEAD e28f9d0

Resolution 1280x800 out of native 1600x900, all graphic detail at minimum.

Radeon: min fps 20, avg fps 65, max fps 95
  In game FPS averages 65 FPS, with no issues during the first minute of the
game.
  After that a valley in the FPS chart of about 3 seconds @ 20 FPS, repeating
throughout the game every 15 seconds, or so.
  FPS drops are independent of the scene complexity, as the same scene after
the drop goes back to the average of 65 FPS.

Intel: min fps 10, avg fps 45, max fps 75
  Same as Radeon, although the FPS drops seems to occur immediately after the
actual game starts.
  FPS drops happen faster than with radeon, about 5 seconds around 45 fps and 5
seconds around 20 fps, a constant up and down throughout the gameplay.
  No relation with scene complexity either.
  Truncated log: http://pastebin.com/xHsekJUD -- this is less than 1 minute of
gameplay.

  I confirm I no longer get EXT_texture_swizzle messages with Intel.

These values are from Left 4 Dead 2
Same effect with Counter Strike: Global Offensive, although the FPS values are
lower probably due to the higher complexity of the map and textures.

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