[Bug 96296] clpeak causes a GPU hang

[Bug 96296] clpeak causes a GPU hang

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https://bugs.freedesktop.org/show_bug.cgi?id=96296

            Bug ID: 96296
           Summary: clpeak causes a GPU hang
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: notasas@gmail.com
        QA Contact: dri-devel@lists.freedesktop.org

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?

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[Bug 96296] clpeak causes a GPU hang

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https://bugs.freedesktop.org/show_bug.cgi?id=96296

--- 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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[Bug 96296] clpeak causes a GPU hang

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https://bugs.freedesktop.org/show_bug.cgi?id=96296

--- 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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[Bug 96296] clpeak causes a GPU hang

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https://bugs.freedesktop.org/show_bug.cgi?id=96296

--- 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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[Bug 96296] clpeak causes a GPU hang

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https://bugs.freedesktop.org/show_bug.cgi?id=96296

--- 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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[Bug 96296] clpeak causes a GPU hang

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https://bugs.freedesktop.org/show_bug.cgi?id=96296

--- 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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[Bug 96296] clpeak causes a GPU hang

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https://bugs.freedesktop.org/show_bug.cgi?id=96296

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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[Bug 96296] clpeak causes a GPU hang

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https://bugs.freedesktop.org/show_bug.cgi?id=96296

--- 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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[Bug 96296] clpeak causes a GPU hang

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https://bugs.freedesktop.org/show_bug.cgi?id=96296

--- 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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[Bug 96296] clpeak causes a GPU hang

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https://bugs.freedesktop.org/show_bug.cgi?id=96296

--- 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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[Bug 96296] clpeak causes a GPU hang

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https://bugs.freedesktop.org/show_bug.cgi?id=96296

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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[Bug 96296] clpeak causes a GPU hang

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https://bugs.freedesktop.org/show_bug.cgi?id=96296

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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[Bug 96296] [clover r600g juniper] clpeak causes a GPU hang

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https://bugs.freedesktop.org/show_bug.cgi?id=96296

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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[Bug 96296] [clover r600g juniper] clpeak causes a GPU hang

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https://bugs.freedesktop.org/show_bug.cgi?id=96296

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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