* [Bug 96296] clpeak causes a GPU hang
2016-05-31 20:47 [Bug 96296] clpeak causes a GPU hang bugzilla-daemon
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--- Comment #1 from Jan Vesely <jan.vesely@rutgers.edu> ---
(In reply to Grazvydas Ignotas from comment #0)
> AMD JUNIPER (DRM 2.43.0 / 4.6.0)
> Mesa 12.1.0-devel (git-3581812)
> llvm-3.8 1:3.8-2ubuntu3
>
> clpeak - https://github.com/krrishnarraj/clpeak.git
>
> As soon as it starts it's float8 test (earlier ones run fine), the machine
> locks up and does not recover. Perhaps it attempts to execute some fp64
> instructions that are missing on Juniper?
any attempt to use doubles should fail to build the kernel (even with llvm
3.8).
Running with CLOVER_DEBUG=llvm,asm CLOVER_OUTPUT=out_file should give you an
idea about what the compiled program looks like, though I'd recommend using
llvm 3.9.
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--- Comment #2 from Grazvydas Ignotas <notasas@gmail.com> ---
Created attachment 124221
--> https://bugs.freedesktop.org/attachment.cgi?id=124221&action=edit
logs
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^ permalink raw reply [flat|nested] 14+ messages in thread* [Bug 96296] clpeak causes a GPU hang
2016-05-31 20:47 [Bug 96296] clpeak causes a GPU hang bugzilla-daemon
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--- Comment #3 from Grazvydas Ignotas <notasas@gmail.com> ---
OK so it's the memory bandwidth test that causes the GPU hang, --compute-dp
fails with "No double precision support! Skipped", as expected.
llvm 3.9 doesn't seemed to be released so I've build the trunk, but the hang is
still there. I've been able to capture the logs before the system dies,
attached.
BTW CLOVER_OUTPUT doesn't seem to be handled, did you mean CLOVER_DEBUG_FILE?
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--- Comment #4 from Jan Vesely <jan.vesely@rutgers.edu> ---
Created attachment 124375
--> https://bugs.freedesktop.org/attachment.cgi?id=124375&action=edit
global_bandwidth_v16_local_offset asm dump
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--- Comment #5 from Jan Vesely <jan.vesely@rutgers.edu> ---
One problem is that starting from R700 ADD_INT is VecALU only instruction
(should not be in Trans slot), but it was not enough to fix the hang on my
Turks.
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Andreas Boll <andreas.boll.dev@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |99553
Referenced Bugs:
https://bugs.freedesktop.org/show_bug.cgi?id=99553
[Bug 99553] Tracker bug for runnning OpenCL applications on Clover
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--- Comment #6 from ricardo.ribalda@gmail.com ---
Using llvm 4.0.1 and the latest git commit from libclc (
17648cd846390e294feafef21c32c7106eac1e24 ):
I am getting a cpu endless loop with clpeak, fixable with ctrl+c.
Other samples, such as Matrix Multiply work fine.
CLOVER_DEBUG=llvm,asm,clc CLOVER_OUTPUT=clover.out clpeak >dump 2>dump.err
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--- Comment #7 from ricardo.ribalda@gmail.com ---
Created attachment 130914
--> https://bugs.freedesktop.org/attachment.cgi?id=130914&action=edit
AMD PALM (DRM 2.49.0 / 4.10.0-qtec-standard, LLVM 4.0.1 + MESA 17.0.3
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--- Comment #8 from Jan Vesely <jan.vesely@rutgers.edu> ---
got this today. No hang.
Platform: Clover
Device: AMD TURKS (DRM 2.49.0 / 4.11.11-300.fc26.x86_64, LLVM 6.0.0)
Driver version : 17.3.0-devel (Linux x64)
Compute units : 6
Clock frequency : 650 MHz
Global memory bandwidth (GBPS)
float : 40.47
float2 : 41.01
float4 : 38.05
float8 : 25.09
float16 : 13.33
Single-precision compute (GFLOPS)
float : 124.18
float2 : 243.14
float4 : 249.80
float8 : 285.99
float16 : 350.36
No double precision support! Skipped
Integer compute (GIOPS)
int : 62.25
int2 : 122.03
int4 : 123.01
int8 : 122.29
int16 : 122.11
Transfer bandwidth (GBPS)
enqueueWriteBuffer : 18.15
enqueueReadBuffer : 3.06
enqueueMapBuffer(for read) : 6.53
memcpy from mapped ptr : 5.65
enqueueUnmap(after write) : 2108.68
memcpy to mapped ptr : 7.49
Kernel launch latency : 67.10 us
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Grazvydas Ignotas <notasas@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|NEW |RESOLVED
--- Comment #9 from Grazvydas Ignotas <notasas@gmail.com> ---
I've changed hardware and can no longer test, so I'll just trust Jan and close
this.
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Jan Vesely <jan.vesely@rutgers.edu> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
--- Comment #10 from Jan Vesely <jan.vesely@rutgers.edu> ---
turns out I spoke too fast. The GPU still hangs, but Linux is better at
recovering.
There are still GPU hang(ring 0 stalled for more than) messages in dmesg.
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Jan Vesely <jan.vesely@rutgers.edu> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|clpeak causes a GPU hang |[clover r600g juniper]
| |clpeak causes a GPU hang
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GitLab Migration User <gitlab-migration@fdo.invalid> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |MOVED
Status|REOPENED |RESOLVED
--- Comment #11 from GitLab Migration User <gitlab-migration@fdo.invalid> ---
-- GitLab Migration Automatic Message --
This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.
You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/586.
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