[Bug 44536] New: [r300g] bisected - performance regression on 0ad

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=44536

             Bug #: 44536
           Summary: [r300g] bisected - performance regression on 0ad
    Classification: Unclassified
           Product: Mesa
           Version: git
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/r300
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: fabio.ped at libero.it
                CC: maraeo at gmail.com


This commit [1] lowers 0 A.D. performance from ~28 fps to ~20 fps, confirmed
with LIBGL_SHOW_FPS=1 mesa variable and with in game FPS counter. This is on
0ad alpha 8 on default Oasis map. Tested with current mesa git up to e60daf7
with and without the [1] commit reverted.

The card is:
r300: DRM version: 2.9.0, Name: ATI RV530, ID: 0x71c5, GB: 1, Z: 2
r300: GART size: 509 MB, VRAM size: 256 MB
r300: AA compression RAM: YES, Z compression RAM: YES, HiZ RAM: YES


[1]
http://cgit.freedesktop.org/mesa/mesa/commit/?id=93f4e3cb6c1ca303ee1f5c2a2491a8eff33f2633

commit 93f4e3cb6c1ca303ee1f5c2a2491a8eff33f2633
Author: Marek Olšák <maraeo at gmail.com>
Date:   Sat Dec 24 08:15:40 2011 +0100

    winsys/radeon: move managing GEM domains back to drivers

    This partially reverts commit 363ff844753c46ac9c13866627e096b091ea81f8.

    It caused severe performance drops in Nexuiz. Reported by Phoronix.

    Tested by me on r300g and by IRC people on r600g.

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