System Environment: -------------------------- Arch: x86_64 Platform: Huronriver Libdrm: (master)2.4.25 Mesa: (master)929b3d82334e217641c3f39e7914a90dadc6e6b2 Xserver:(master)xorg-server-1.10.0-313-g5cb31cd0cbf83fff5f17a475e7b0e45246b19bf3 Xf86_video_intel: (master)2.15.0-6-g67e5a74e997f199327f9115c7ba867df3c49da8d Kernel: (drm-intel-next)daab1470018f025e0b1c8731dfb825ff421ffd9b Bug detailed description: ------------------------- This case failed and caused system hang on huronriver. The last known good commit is 1a447749ed421db8eb6ba20012630785aef9bb12, the last known bad commit is bb7ff01deb5c1eb813b90da6f40d987a67e2793b. We unable to bisect the first bad commit due to mesa build error. Anyway, the first bad commit could be any of below: bb7ff01deb5c1eb813b90da6f40d987a67e2793b 588cebce2d5b6afd24b72603d744d390481310dd 04e3f1d3c29c68343e709d566b7fe13d617f8d13 a82a43e8d99e1715dd11c9c091b5ab734079b6a6 855f56ca13c1003396a81da1a110357d624a2101 Reproduce steps: ------------------------- 1. start X 2. INTEL_STRICT_CONFORMANCE=1 oglconform -z -s -suite all -v 2 -D 33 -test api- texcoord
Something fishy is happening with the bisect. For example, commit 04e3f1d3 adds some comments and moves a structure field. There is no way that commit broke the build. I recommend doing 'git clean -fxd' at each bisect step. Mesa's build system is notoriously bad, so there could be garbage left over from previous builds that cause later builds to fail.
Please retest with the kernel updated to keithp's drm-intel-next with the forcewake patches. Incorrect forcewake handling could add up to intermittent GPU hangs.
Created attachment 47180 [details] oglc api-mtexcoord output Tested with keithp's drm-intel-next kernel 9e3c25, System doesn't hang but GPU hangs when case running, and the case still fails. dmesg shows: [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
Created attachment 47182 [details] i915_error_state
(In reply to comment #1) > Something fishy is happening with the bisect. For example, commit 04e3f1d3 > adds some comments and moves a structure field. There is no way that commit > broke the build. I recommend doing 'git clean -fxd' at each bisect step. > Mesa's build system is notoriously bad, so there could be garbage left over > from previous builds that cause later builds to fail. I do 'git clean -fxd' at each bisect step, but the four mesa commit build still fail.
Reproduced the failure (./oglconform -D 33 -s -v 3 -1 api-texcoord.c), and a workaround (always_flush_batch=true in environment).
I did the bisect by rebasing the change sequence with the build failure so that the build never failed (squash last commit into first build-failing commit). That leads the bisect to: commit a82a43e8d99e1715dd11c9c091b5ab734079b6a6 Author: Eric Anholt <eric@anholt.net> Date: Fri Apr 22 16:00:14 2011 -0700 i965/gen6: Use the dynamic state base address to reduce relocations. The specific hunk that triggers the failure is moving brw_state_base_address, and bisecting *that* shows that it's when brw_state_base_address moves above gen6_vs_state.
commit 3e5d36267d8c9536490c902f785137a7fa0637fc Author: Eric Anholt <eric@anholt.net> Date: Tue Jul 19 15:06:15 2011 -0700 i965: Apply a homebrew workaround for GPU hang in OGLC api-texcoord. The behavior of flushes in the hardware is a maze of twisty passages, and strangely the VS constants appear to be loaded during a pipeline flush instead of at the time of the packet emit according to the simulator. On moving the STATE_BASE_ADDRESS packet to where it really needed to live (in order for data loads by other packets to be correct), we sometimes no longer got a flush between those packets where we apparently needed it. This replicates the flushes implied by a STATE_BASE_ADDRESS update, fixing the GPU hangs in OGLC and the "engine" demo. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=36821 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=39257 Tested-by: Keith Packard <keithp@keithp.com> (bzflag and etracer fixed) Acked-by: Kenneth Graunke <kenneth@whitecape.org>
Verified with master commit 1284d5b25507a56634519ac385cbc00a00b94417.
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