https://bugs.freedesktop.org/show_bug.cgi?id=105291
Bug ID: 105291
Summary: r600 [CEDAR]: GPU stalls when running shadertoy
"ladybug"
Product: Mesa
Version: git
Hardware: Other
URL: https://www.shadertoy.com/view/4tByz3
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/Gallium/r600
Assignee: mesa-dev@lists.freedesktop.org
Reporter: gw.foss...@gmail.com
QA Contact: mesa-dev@lists.freedesktop.org
CC: russianneuroman...@ya.ru
Running the shader toy example
https://www.shadertoy.com/view/4tByz3
causes a GPU stall on CEDAR:
radeon 0000:06:00.0: ring 0 stalled for more than 10360msec
radeon 0000:06:00.0: GPU lockup (current fence id 0x00000000000005c1
last fence id 0x0000000000000644 on ring 0)
radeon 0000:06:00.0: Saved 4178 dwords of commands on ring 0.
...
[drm:r600_ib_test [radeon]] *ERROR* radeon: fence wait timed out.
[drm:radeon_ib_ring_tests [radeon]] *ERROR* radeon: failed testing
IB on GFX ring (-110).
The same shader toy runs fine on BARTS.
Considering that this shader runs at 1.6 FPS on BARTS the timeout could also
happen because it simply take to long to process a shader stage (i.e. one
shader is 32750 DW long (optimized) and has a few long nested loops).
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