|Summary:||[G45 64-bit] ut2004-demo hang after running auto benchmark for 1 min|
|Product:||Mesa||Reporter:||zhao jian <jian.j.zhao>|
|Component:||Drivers/DRI/i965||Assignee:||Eric Anholt <eric>|
|Status:||VERIFIED FIXED||QA Contact:|
|i915 platform:||i915 features:|
gpu dump info
gpu dump after ut2004 hangs X
Description zhao jian 2009-04-21 20:08:08 UTC
Created attachment 25021 [details] xorg.0.log System Environment: -------------------------- Host: G45 Arch: X86_64 Kernel: 184.108.40.206 Libdrm: (master)a1e3ab9e55047c08a4006ec389c1a99b72bc672c Mesa: (mesa_7_4_branch)e8807a14a61a0b9389aa2f2a113da24ab22a364d Xserver: (server-1.6-branch)11db545a86c8933c638a0bc1fcd4f2c65279f617 Xf86_video_intel: (2.7)296a986e5258e2fd13ec494071b7063bd639cd68 Bug detailed description: -------------------------- start X and run ut2004-demo, both with exa and uxa it will hang after about 1 minute. Reproduce steps: ---------------- 1.xinit & 2. run ut2004 demo(benchmark.sh)
Comment 1 Gordon Jin 2009-04-21 20:16:40 UTC
Isn't this like bug#19231? (just needs shorter time to reproduce?) Does this impact the auto benchmarking?
Comment 2 zhao jian 2009-04-21 20:21:20 UTC
(In reply to comment #1) > Isn't this like bug#19231? (just needs shorter time to reproduce?) > Does this impact the auto benchmarking? No. What I mean is just its benchmark. Maybe it is caused by its kernel.
Comment 4 Gordon Jin 2009-06-09 10:58:10 UTC
Jian, does this still exist with Q2 RC1 package? Eric, this blocks our nightly performance regression testing on this machine (for stable release branch).
Comment 5 zhao jian 2009-06-14 20:39:06 UTC
(In reply to comment #4) > Jian, does this still exist with Q2 RC1 package? > Eric, this blocks our nightly performance regression testing on this machine > (for stable release branch). Yes, it still exist with Q2 RC1 package. And its gpu dump is in attachment.
Comment 6 zhao jian 2009-06-14 20:42:19 UTC
Created attachment 26793 [details] gpu dump after ut2004 hangs X
Comment 7 Eric Anholt 2009-06-23 19:38:22 UTC
Spent a bunch of time today looking into this. always_flush_batch=true always_flush_cache=true INTEL_DEBUG=sync narrowed it down to a small batchbuffer in the dump where it all looked sane as far as I can tell (new bits are pushed to intel_gpu_dump for better decoding, too). My current guess is that the VS program is failing (see updated intel_gpu_top output at hang time) and the instruction parser error is a red herring.
Comment 8 Eric Anholt 2009-06-29 23:49:05 UTC
Based on finding today that the G965 doesn't exhibit the problem while the G/GM45 does, other things that don't help: - Switching G4x to use only 256 URB register pairs - Enabling the -RHW workaround - Cutting max VS threads to 16 like 965. - Cutting max WM threads to 32 like 965. What did help was forcing the minimum URB allocation. More experimenting with this tomorrow.
Comment 9 Eric Anholt 2009-06-30 15:31:28 UTC
*** Bug 19231 has been marked as a duplicate of this bug. ***
Comment 10 Eric Anholt 2009-06-30 17:58:03 UTC
commit cf8ce46531130df3e486fe13567c4aed09b17292 Author: Eric Anholt <firstname.lastname@example.org> Date: Tue Jun 30 14:26:06 2009 -0700 i965: Increase G4X default VS URB allocation to actually allow 32 threads. This improves the performance of my GLSL demo by 30%. It also fixes the VS deadlock that ut2004 had, for reasons I can't explain. Bug #21330. This will be cherry-picked to 7.5 if the next set of regression testing comes out OK.
Comment 11 zhao jian 2009-07-03 03:58:24 UTC
It works well on master branch now. verified.
Comment 12 zhao jian 2009-07-21 20:00:07 UTC
Eric, can you cherry pick this fix to mesa 7.5 branch?