[Bug 98492] X-Plane 10 Core Dumping when using Real-Weather or any clouds

[Bug 98492] X-Plane 10 Core Dumping when using Real-Weather or any clouds

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https://bugs.freedesktop.org/show_bug.cgi?id=98492

            Bug ID: 98492
           Summary: X-Plane 10 Core Dumping when using Real-Weather or any
                    clouds
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: amarildo-geral@autistici.org
        QA Contact: dri-devel@lists.freedesktop.org

Created attachment 127609
  --> https://bugs.freedesktop.org/attachment.cgi?id=127609&action=edit
journalctl

X-Plane crashes when using Real_weather or when setting up any kinds of clouds
for the Sim.

As per journalctl would suggest, libpthreads isn't the cause. I've isntalled it
here on Arch and the sim still crashes.

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[Bug 98492] X-Plane 10 Core Dumping when using Real-Weather or any clouds

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https://bugs.freedesktop.org/show_bug.cgi?id=98492

--- Comment #1 from Nicolai Hähnle <nhaehnle@gmail.com> ---
Hi Amarildo, could you provide a backtrace with debug symbols of radeonsi?
Also, if you could reproduce this with an apitrace and upload it somewhere,
that would be very helpful.

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[Bug 98492] X-Plane 10 Core Dumping when using Real-Weather or any clouds

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https://bugs.freedesktop.org/show_bug.cgi?id=98492

--- Comment #2 from Amarildo <amarildo-geral@autistici.org> ---
Created attachment 127758
  --> https://bugs.freedesktop.org/attachment.cgi?id=127758&action=edit
GALLIUM_DDEBUG-1

GALLIUM_DDEBUG="pipelined 2000"
FILE 1

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[Bug 98492] X-Plane 10 Core Dumping when using Real-Weather or any clouds

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https://bugs.freedesktop.org/show_bug.cgi?id=98492

--- Comment #3 from Amarildo <amarildo-geral@autistici.org> ---
Created attachment 127759
  --> https://bugs.freedesktop.org/attachment.cgi?id=127759&action=edit
GALLIUM_DDEBUG-2

GALLIUM_DDEBUG 2

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[Bug 98492] X-Plane 10 Core Dumping when using Real-Weather or any clouds

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https://bugs.freedesktop.org/show_bug.cgi?id=98492

--- Comment #4 from Amarildo <amarildo-geral@autistici.org> ---
(In reply to Nicolai Hähnle from comment #1)
> Hi Amarildo, could you provide a backtrace with debug symbols of radeonsi?
> Also, if you could reproduce this with an apitrace and upload it somewhere,
> that would be very helpful.

Absolutely. I just need to know what is the exact command to launch the
simulator with. Could you specify it to me? 

I ran it with `GALLIUM_DDEBUG="pipelined 2000"` and I'm attatching the
resulting files now.

In the mean time I'll record it and upload the video yo YouTube.

Cheers

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[Bug 98492] X-Plane 10 Core Dumping when using Real-Weather or any clouds

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https://bugs.freedesktop.org/show_bug.cgi?id=98492

--- Comment #5 from Nicolai Hähnle <nhaehnle@gmail.com> ---
So I'm confused, you're seeing hangs now?

Judging by another X-Plane 10-related bug report, you should run with the
MESA_EXTENSION_OVERRIDE=-GL_AMD_pinned_memory environment variable setting.

If you're still seeing crashes, please install debug symbols for the radeonsi
driver and run in gdb. I.e.: `MESA_EXTENSION_OVERRIDE=-GL_AMD_pinned_memory gdb
X-Plane-x86_64`, and then `run --force_run`.

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[Bug 98492] X-Plane 10 Core Dumping when using Real-Weather or any clouds

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https://bugs.freedesktop.org/show_bug.cgi?id=98492

--- Comment #6 from Amarildo <amarildo-geral@autistici.org> ---
(In reply to Nicolai Hähnle from comment #5)
> So I'm confused, you're seeing hangs now?
> 
> Judging by another X-Plane 10-related bug report, you should run with the
> MESA_EXTENSION_OVERRIDE=-GL_AMD_pinned_memory environment variable setting.
> 
> If you're still seeing crashes, please install debug symbols for the
> radeonsi driver and run in gdb. I.e.:
> `MESA_EXTENSION_OVERRIDE=-GL_AMD_pinned_memory gdb X-Plane-x86_64`, and then
> `run --force_run`.

Hi Nicolai,

The hangs only happen with the radeon Kernel driver. Today I tested linux-4.8.8
with the radeon Kernel driver, with mesa-git and llvm-svn, and the system
hanged. However, setting up clouds did not make the Sim crash.
I'm yet to test X-Plane with radeon, mesa-git llvm-svn, and that environment
you specified.

-----------------

The crash mentioned on this bug only happen with the amdgpu Kernel driver. Last
time I tried I couldn't use this driver with regular/stable Mesa.

Setting up `MESA_EXTENSION_OVERRIDE='-GL_AMD_pinned_memory'` WORKS! :D Could
you explain what it does? Could you push a patch so users are not required to
run this environment manually?

Thank you very much for your support so far.

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[Bug 98492] X-Plane 10 Core Dumping when using Real-Weather or any clouds

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https://bugs.freedesktop.org/show_bug.cgi?id=98492

--- Comment #7 from Nicolai Hähnle <nhaehnle@gmail.com> ---
What this setting does is disable support for the specified extension. The
problem here is that the application uses the extension in a problematic way:
by the way the extension is phrased, it should only work for allocations at a
page-level granularity. X-Plane 10 tries to use it for a different granularity
and doesn't check for error results (which it really must).

We could hack around the page-level granularity limitations in the same way
that the closed-source driver does it, but I'm hesitant to do so because it can
never be a complete fix: if two pinned buffers overlap on the same page, we
simply cannot support that currently. So who knows what other potential
application bugs we'd just be papering over.

As for a patch, we might add a driconf-based application-specific workaround
for this.

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[Bug 98492] X-Plane 10 Core Dumping when using Real-Weather or any clouds

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https://bugs.freedesktop.org/show_bug.cgi?id=98492

Timothy Arceri <t_arceri@yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #8 from Timothy Arceri <t_arceri@yahoo.com.au> ---


*** This bug has been marked as a duplicate of bug 97909 ***

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