[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

            Bug ID: 87886
           Summary: constant fps drops with Intel and Radeon on Source
                    games
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Mesa core
          Assignee: mesa-dev at lists.freedesktop.org
          Reporter: stephane.travostino at gmail.com

I'm experiencing constant fps drops every few seconds with both intel and
radeon cards (the latter with DRI_PRIME=1) on Source games,

When using the intel card and INTEL_DEBUG=perf I see "recompiling fragment
shader" messages during drops, see http://pastebin.com/5zV9uuRb
This messages repeat every drop, and the games goes from the maximum 40fps for
a couple of seconds to ~10 fps for 3/4 seconds.

This happens with the radeon card too, and with
GALLIUM_HUD=fps,buffer-wait-time I see the latter parameter increasing to
around 5k during fps drops.

This happens with Counter Strike: Global Offensive and Left 4 Dead 2 (only
games available for testing), also when standing still in an empty black room.

$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller (rev 09) -- SANDYBRIDGE
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Whistler [Radeon HD 6630M/6650M/6750M/7670M/7690M] (rev ff)

OS Archlinux x86-64 + Linux 3.18
Mesa git version 67105.0c7f895

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/mesa-dev/attachments/20141231/0a1b8ffa/attachment.html>