[Bug 101198] Major performance regression for AMD card

[Bug 101198] Major performance regression for AMD card

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https://bugs.freedesktop.org/show_bug.cgi?id=101198

            Bug ID: 101198
           Summary: Major performance regression for AMD card
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: All
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: dark.shadow4@web.de
        QA Contact: dri-devel@lists.freedesktop.org

With the latest git mesa, there are major performance drops. First noticed the
issue with the 32bit steam game "Move or die", but it seems to affect the whole
system. It basically makes the game unplayable.

Bisecting pointed me to the following commit:

commit 524d4fff9e0e58e812e71bc5ba2c92ffa73bee16
Author: Leo Liu <leo.liu@amd.com>
Date:   Wed May 3 14:06:35 2017 -0400

    amd/common: add vcn dec ip info query

    Signed-off-by: Leo Liu <leo.liu@amd.com>
    Reviewed-by: Christian König <christian.koenig@amd.com>

I tried reverting it, but it doesn't apply cleanly.


Running Arch Linux 64
Linux 4.11.2

System the issue was tested on:
- Arch Linux 64bit
- Linux 4.11.2, AMDGPU driver
- Radeon R9 285

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[Bug 101198] Major performance regression for AMD card

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https://bugs.freedesktop.org/show_bug.cgi?id=101198

Fabian Maurer <dark.shadow4@web.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |bisected, regression

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[Bug 101198] Major performance regression for AMD card

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https://bugs.freedesktop.org/show_bug.cgi?id=101198

--- Comment #1 from Fabian Maurer <dark.shadow4@web.de> ---
Just noticed, this seems to be reverted already during the time I need to setup
and bisect mesa.

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[Bug 101198] Major performance regression for AMD card

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https://bugs.freedesktop.org/show_bug.cgi?id=101198

--- Comment #2 from Dieter Nützel <Dieter@nuetzel-hh.de> ---
Hi Fabian,

David reverted it and Leo Liu sent an update just in time:
Please try with this one:
https://lists.freedesktop.org/archives/mesa-dev/2017-May/156930.html

Dicussion was here:
https://lists.freedesktop.org/archives/mesa-dev/2017-May/156907.html
https://lists.freedesktop.org/archives/mesa-dev/2017-May/156931.html

Cheers,
Dieter

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[Bug 101198] Major performance regression for AMD card

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https://bugs.freedesktop.org/show_bug.cgi?id=101198

--- Comment #3 from Kai <kai@dev.carbon-project.org> ---
(In reply to Fabian Maurer from comment #0)
> With the latest git mesa, [...]

Can't be the latest, since the commit you've identified is already reverted:
<https://cgit.freedesktop.org/mesa/mesa/commit/?id=e1409f730251bf9d7e70046f58392de6e4e98815>.
I find it helpful giving exact commit IDs of the builds I'm using (or the
version number, whatever is more accurate). Otherwise bug reports don't tend to
age well. ;-)

In any case, if you're bisection is correct, you should check a build of
current HEAD (e1409f730251bf9d7e70046f58392de6e4e98815) and close this bug if
appropriate. Otherwise a new biscetion would be required.

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[Bug 101198] Major performance regression for AMD card

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https://bugs.freedesktop.org/show_bug.cgi?id=101198

--- Comment #4 from Dieter Nützel <Dieter@nuetzel-hh.de> ---
(In reply to Dieter Nützel from comment #2)
> Hi Fabian,
> 
> David reverted it and Leo Liu sent an update just in time:
> Please try with this one:
> https://lists.freedesktop.org/archives/mesa-dev/2017-May/156930.html
> 
> Dicussion was here:
> https://lists.freedesktop.org/archives/mesa-dev/2017-May/156907.html
> https://lists.freedesktop.org/archives/mesa-dev/2017-May/156931.html
> 
> Cheers,
> Dieter

s/Discussion...

Bonus:
When you've tested it fine, you can send four (first) 'Tested-by:' ;-)

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[Bug 101198] Major performance regression for AMD card

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https://bugs.freedesktop.org/show_bug.cgi?id=101198

Fabian Maurer <dark.shadow4@web.de> changed:

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

--- Comment #5 from Fabian Maurer <dark.shadow4@web.de> ---
Thanks, just tested, it works fine after the commit was reverted. Marking this
as resolved.

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[Bug 101198] Major performance regression for AMD card

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https://bugs.freedesktop.org/show_bug.cgi?id=101198

--- Comment #6 from leoxsliu@gmail.com ---
I can reproduce the problem with kernel that has no vcn patch, and the fix sent
to mesa-dev list was tested and have issue fixed.

Thanks,
Leo

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