Bug 83972

Summary: [BYT-M ppgtt] GPU HANG: ecode 2:0x00fffff7 when run 3D Performance(eg. etqw_1_10 ) sometimes
Product: DRI Reporter: zhoujian <jianx.zhou>
Component: DRM/IntelAssignee: Chris Wilson <chris>
Status: CLOSED WONTFIX QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: enhancement    
Priority: medium CC: intel-gfx-bugs, lilix.cheng, wendy.wang
Version: unspecified   
Hardware: All   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
dmesg.log
none
error.log none

Description zhoujian 2014-09-17 08:40:08 UTC 
Platform: BYT-M
Libdrm:(master)libdrm-2.4.56-25-g86b37c61c78edd1353a3f76f678c39e2ec168771
Mesa:(master)7f6872d012e66b11b64179cd7c214d10d4ae55cd
Xserver:(master)xorg-server-1.16.0-176-gd3427717f2c6a473dc3d20631dff653e4e37228e
Xf86_video_intel:(master)2.99.916-43-gd470f0f520f6bd160ae4acef2b4b3c86afd8dbbd
Cairo:(master)0aa43ed886c0f8468a21a470f2f024bd4d8a4513
Libva:(master)e0d25ece01e7aba819c910e98c4fb4706cdab055
Libva_intel_driver:(master)bc2e06ef0f89b264fe968fbff4f06e425385c3d8
Kernel:(drm-intel-nightly)43df30da20447e2856b2761215ff274886a9f931

Bug detailed description:
---------------------------------------------
GPU Hang when run 3D Performance(eg. etqw_1_10 ) on BYT-M,This issue fail rate is low.
Add argument "i915.enable_ppgtt=1" on nightly kernel, it can works well.
The dmesg info you can see dmesg.log.

Reproduce steps:
---------------------------------------------
1. xinit&
2. vbank_mode=0 ./etqw.x86 +set in_tty 0 +set sys_VideoRam 64 +set r_mode -1 +exec etqw-pts.cfg +set r_customWidth 1920 +set r_customHeight 1080 +vid_restart
Comment 1 zhoujian 2014-09-17 08:41:13 UTC 
Created attachment 106418 [details]
dmesg.log
Comment 2 Chris Wilson 2014-09-17 08:45:08 UTC 
After a GPU hang, please attach /sys/class/drm/card0/error
Comment 3 zhoujian 2014-09-18 01:30:24 UTC 
(In reply to comment #2)
> After a GPU hang, please attach /sys/class/drm/card0/error
Ok,Using command:"cat /sys/class/drm/card0/error" get error info, you can see error.log.
Comment 4 zhoujian 2014-09-18 01:31:02 UTC 
Created attachment 106471 [details]
error.log
Comment 5 Chris Wilson 2014-09-18 06:14:57 UTC 
Ok, that has the similar symptoms that the PDE were incorrect and the BCS just read random pages.
Comment 6 wendy.wang 2014-11-07 04:42:55 UTC 
Default enable_ppgtt is 1, this issue cannot reproduce.
Comment 7 Daniel Vetter 2014-11-21 10:32:16 UTC 
Features not enabled by default are treated as enhancements nowadays.
Comment 8 Jesse Barnes 2015-03-02 21:32:14 UTC 
No full PPGTT on pre-gen8.

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