Bug 19150 - [i915 GEM]low performance when run mesa demo/cubemap
Summary: [i915 GEM]low performance when run mesa demo/cubemap
Status: VERIFIED FIXED
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/DRI/i915 (show other bugs)
Version: unspecified
Hardware: Other Linux (All)
: medium normal
Assignee: haihao
QA Contact:
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2008-12-17 20:56 UTC by liuhaien
Modified: 2008-12-18 01:18 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

Attachments
xorg conf file (4.03 KB, text/plain)
2008-12-17 20:56 UTC, liuhaien 		Details
xorg.0.log (41.45 KB, text/plain)
2008-12-17 20:57 UTC, liuhaien 		Details
View All

Description liuhaien 2008-12-17 20:56:46 UTC 
Created attachment 21258 [details]
xorg conf file

System Environment:
--------------------------
host:x-bl2
arch: x86_64
Libdrm:         (master)c86d431fe6174b1c2de531929213ea7dbd92326d
Mesa_stable:    (intel-2008-q4)0d5b1e591b7fb2cf3109b7e147bb3ea6aa8f8b15
Xserver_stable:  (server-1.6-branch)32e81074b967716865aef08b66ec29caf0fec2c5
Xf86_video_intel_stable:  (xf86-video-intel-2.6-branch)
              83f3c376b5942e134047a220e6e5f2432ffc492c


Bug detailed description:
-------------------------
start X, then run cubemap, we will get a very low performance.

Reproduce steps:
----------------
1.xinit&
2. run mesa demo/cubemap
Comment 1 liuhaien 2008-12-17 20:57:13 UTC 
Created attachment 21259 [details]
xorg.0.log
Comment 2 Eric Anholt 2008-12-17 21:12:13 UTC 
git-bisect?
sysprof?
INTEL_DEBUG=fall?
Comment 3 liuhaien 2008-12-17 22:29:38 UTC 
haihao has got the reason of this issue, so I reassign it to him.
Comment 4 haihao 2008-12-17 23:01:07 UTC 
fixed in mesa.

commit cb453244caa15342bf229ee5ae16a78d038b8bdc
Author: Xiang, Haihao <haihao.xiang@intel.com>
Date:   Thu Dec 18 12:57:41 2008 +0800

    i915: check WRAP_T instead of WRAP_R for cube map texture.

Note apps those don't use  CLAMP_TO_EDGE/CLAMP for cube map texture have to suffer from fallbacks.
Comment 5 liuhaien 2008-12-18 01:18:22 UTC 
verified against:
intel-2008-q4 branch commit f96baeaac3ef41260ac3975750627ece073fdce0
master commit cb453244caa15342bf229ee5ae16a78d038b8bdc

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