[Bug 99312] Long-running OpenCL kernels cause ring stalls and GPU lockups on Kabini

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99312

            Bug ID: 99312
           Summary: Long-running OpenCL kernels cause ring stalls and GPU
                    lockups on Kabini
           Product: Mesa
           Version: 13.0
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: vedran at miletic.net
        QA Contact: dri-devel at lists.freedesktop.org

Running long lasting OpenCL kernels (e.g. GROMACS with a system of many atoms)
using kernel 4.8.15, Mesa git, and LLVM git on Kabini APU:

vendor_id       : AuthenticAMD
cpu family      : 22
model           : 0
model name      : AMD Athlon(tm) 5350 APU with Radeon(tm) R3
stepping        : 1
microcode       : 0x700010b

with GPU:

00:01.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Kabini [Radeon HD 8400 / R3 Series] [1002:9830]

causes GPU lockups like:

[338584.980657] radeon 0000:00:01.0: ring 0 stalled for more than 10351msec
[338584.980811] radeon 0000:00:01.0: GPU lockup (current fence id
0x00000000000827c1 last fence id 0x00000000000827c2 on ring 0)
[338585.484633] radeon 0000:00:01.0: ring 0 stalled for more than 10855msec
[338585.484789] radeon 0000:00:01.0: GPU lockup (current fence id
0x00000000000827c1 last fence id 0x00000000000827c2 on ring 0)
[338585.988632] radeon 0000:00:01.0: ring 0 stalled for more than 11359msec
[338585.988787] radeon 0000:00:01.0: GPU lockup (current fence id
0x00000000000827c1 last fence id 0x00000000000827c2 on ring 0)

Machine does not hang. This is reliably reproducible. Any other info I can
provide?

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