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[prenex]

Thanks! Added similar writeup about fixing the HyperZ issue of mine:

http://ballmerpeak.web.elte.hu/devbl...el-module.html...

[prenex]

I was happily playing Urban Terror (also an ioquake game) on my Mobility Radeon Xpress 200M for testing and get very good FPS - it was a slideshow before...

[prenex]

Added a blog post about the whole issue and its solving process here:

http://ballmerpeak.web.elte.hu/devbl...a-and-the-linu...

[prenex]

It seems slowdown is now completely fixed - but who knows when it gets to official mesa builds. Until then the bug report contains the proper fixes anyone...

[prenex]

A more proper quickfix is available that works with current 19.x mesa. See bug report.

[prenex]

Now there are a halfway complete proposed solution by Marek here:

https://bugs.freedesktop.org/show_bug.cgi?id=110781

It works...

[prenex]

Sorry... the commit itself is not giant, jut after the bisect finished git moved to the commit where I started bisecting... my bad, my mistake that I...

[prenex]

8b3a257851905ff444d981e52938cbf2b36ba830 is the first bad commit
commit 8b3a257851905ff444d981e52938cbf2b36ba830
Author: Marek Olšák <[email protected]>...

[prenex]

I am getting really close to bisecting the bigger identified problem.

bad: b672c3833b7
good: aff1ad0798

Now at this point:...

[prenex]

Actually the bug is already reported here:

https://bugs.freedesktop.org/show_bug.cgi?id=110781

Still in the same time I continue...

[prenex]

Hi!!!

Finally I got to a point in bisecting where I will answer "git bisect good"!!!

This is really awsome feeling...

[prenex]

I have found it fast that when I build mesa myself 18.0.0 is still bad:

Fast mesa version: 17.2.8 (2017 december 22)
Slow mesa version:...

[prenex]

Thanks for the links so far! I will dig them and especially good to know about the coding style link and that I should look for opengl resources on Khronos...

[prenex]

When doing an strace on glxgears this is what I am getting:

  ...
  ioctl(6, DRM_IOCTL_RADEON_GEM_CREATE, 0xbfafd880) = 0 <0.000068>

...

[prenex]

I have made perf output logs available here:

ballmerpeak.web.elte.hu/perf_report_arch_oldmesa.txt
ballmerpeak.web.elte.hu/perf_arch_oldmesa.data...