Bug 38762

Summary: [IVB bisected]3D demos like glxgears abort
Product: Mesa Reporter: meng <mengmeng.meng>
Component: Drivers/DRI/i965Assignee: Kenneth Graunke <kenneth>
Status: VERIFIED FIXED QA Contact:
Severity: blocker    
Priority: highest CC: eric
Version: unspecified   
Hardware: x86 (IA32)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments: Xorg.0.log

Description meng 2011-06-28 23:49:40 UTC 
Created attachment 48540 [details]
Xorg.0.log

System Environment:
--------------------------
Platform: IvyBridge
Mesa:     (7.11)bd40e7cebd94a6ec68b9f3a73e6d62d95bb4a5a8
Xserver:  (server-1.10-branch)xorg-server-1.10.99.901-49-g4dbed2625431a92e20bede7b8cef847b5d5d99ba
Xf86_video_intel:(master)2.15.0-151-g95866bd6bdaeb612732fd43ec1b93e088763086e
Cairo:    (master)ea645913ba8739377ee2e2b51480310befc19b76
Libva:    (master)5b5dfd0e196c53331fde8a21e942619ab5237a9a
Kernel:   (drm-intel-fixes) f01c22fd59aa10a3738ede20fd4b9b6fd1e2eac3

Bug detailed description:
-------------------------
3D demos like glxgears abort on IvyBridge.And compiz can't work in gnome-session.It's mesa regression.By bisected,show that c173541d9769d41a85cc899bc49699a3587df4bf
is first bad commit.Pls see Xorg.log.
In console when running glxgears:
Running synchronized to the vertical refresh.  The framerate should be
approximately the same as the monitor refresh rate.
glxgears: gen7_urb.c:81: upload_urb: Assertion `brw->gs.prog_active' failed.
Aborted (core dumped)

commit c173541d9769d41a85cc899bc49699a3587df4bf
Author: Eric Anholt <eric@anholt.net>
Date:   Wed Apr 27 13:33:10 2011 -0700

    i965: Use state streaming on programs, and state base address on gen5+.

    There will be a little bit of thrashing of the program cache BO as the
    cache warms up, but once the application is in steady state, this
    reduces relocations on gen5 and later.

    On my T420 laptop, cairogl firefox-talos-gfx performance improves 2.6%
    +/- 1.3% (n=6).  No statistically significant performance difference
    on nexuiz (n=5).

Reproduce steps:
-------------------------
1.xinit&
2.glxgears
Comment 1 Gordon Jin 2011-06-29 00:26:00 UTC 
No problem on SNB or Ironlake?
Comment 2 meng 2011-06-29 01:10:33 UTC 
SNB and Ironlake is OK.
Comment 3 Kenneth Graunke 2011-06-29 11:02:27 UTC 
Should be fixed on master by the following commit:

commit 5ddc518401ae69ad92218643f00ef50617a0f11d
Author: Kenneth Graunke <kenneth@whitecape.org>
Date:   Wed Jun 29 10:53:51 2011 -0700

    i965/gen7: Add missing ! to brw->gs.prog_active assertion.
    
    A typo in commit c173541d9769 accidentally removed the !.
    It's supposed to assert that there is _not_ an active GS program.
    
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=38762
    
    Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>

Also cherry-picked to 7.11 as a8d7f36d6598da452c9724d41b74feff4a0cdd88.  Normally I'd let it sit, but this was obviously wrong, trivial, and for unreleased hardware and software anyway.
Comment 4 meng 2011-06-29 17:36:29 UTC 
Verified with 5ddc518401ae69ad92218643f00ef50617a0f11d,it works fine.

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