[Bug 103917] [gfx9/Vega] Performance regression in master, 17.3 works fine

[Bug 103917] [gfx9/Vega] Performance regression in master, 17.3 works fine

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https://bugs.freedesktop.org/show_bug.cgi?id=103917

            Bug ID: 103917
           Summary: [gfx9/Vega] Performance regression in master, 17.3
                    works fine
           Product: Mesa
           Version: git
          Hardware: All
                OS: All
            Status: NEW
          Severity: critical
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: vedran@miletic.net
        QA Contact: dri-devel@lists.freedesktop.org

I'm using Fedora rawhide (to become 28) along with Mesa 17.3.0-rc3, LLVM 5.0.0
and Kernel 4.15-git. If I install Mesa 17.3.0-rc5, everything still works fine.
If I install Mesa git, everything works fine with 17.3-rc3 running desktop and
17.4 running games.

After rebo a reboot, however, with Mesa git running both the desktop and games,
performance in games is very bad, rougly 1 fps.

I tried to bisect, but wasn't able to figure out what commit exactly is causing
the problem. I compile Mesa with

./autogen.sh --enable-egl --enable-driglx-direct --disable-gles1 --enable-gles2
--enable-shared-glapi --enable-glx-tls --enable-dri --enable-texture-float
--with-dri-drivers="" --with-egl-platforms=drm,wayland,surfaceless,x11
--with-gallium-drivers=r600,radeonsi,swrast --with-vulkan-drivers=radeon
--enable-opencl --enable-opencl-icd PKG_CONFIG_PATH=/usr/local/lib64/pkgconfig
--enable-nine --enable-gbm --enable-va --enable-vdpau
--libdir=/usr/local/lib64; make clean; make -j4; make -j4 check

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[Bug 103917] [gfx9/Vega] Performance regression in master, 17.3 works fine

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https://bugs.freedesktop.org/show_bug.cgi?id=103917

--- Comment #1 from Michel Dänzer <michel@daenzer.net> ---
(In reply to Vedran Miletić from comment #0)
> I tried to bisect, but wasn't able to figure out what commit exactly is
> causing the problem.

What was the problem? Were you able to narrow it down at least?

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[Bug 103917] [gfx9/Vega] Performance regression in master, 17.3 works fine

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https://bugs.freedesktop.org/show_bug.cgi?id=103917

--- Comment #2 from Vedran Miletić <vedran@miletic.net> ---
Last week I rechecked, but all I got on master was non-working mouse clicks
(weird, I know) under Wayland and crashes under Xorg. I'll recheck again.

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[Bug 103917] [gfx9/Vega] Performance regression in master, 17.3 works fine

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https://bugs.freedesktop.org/show_bug.cgi?id=103917

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

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

--- Comment #3 from Timothy Arceri <t_arceri@yahoo.com.au> ---
(In reply to Vedran Miletić from comment #0)
> I'm using Fedora rawhide (to become 28) along with Mesa 17.3.0-rc3, LLVM
> 5.0.0 and Kernel 4.15-git. If I install Mesa 17.3.0-rc5, everything still
> works fine. If I install Mesa git, everything works fine with 17.3-rc3
> running desktop and 17.4 running games.
> 

Using rawhide especially so early into a release you should expect issues all
over the place. This isn't a very good way to be testing Mesa from git and
reporting issues, for example there can be kernel/gcc/x/desktop bugs etc it
makes it hard to narrow things down, on top of that package versions are
constantly changing. It's better to Upgrade Mesa/LLVM/kernel etc on a stable
distro for your testing.

> After rebo a reboot, however, with Mesa git running both the desktop and
> games, performance in games is very bad, rougly 1 fps.
> 

It could be anything but possibly you have fallen back to software rendering. 

Anyway Fedora 28 will be using LLVM 6.0, Linux 4.16. I'm going to close the bug
report as there isn't much to go on here, but feel free to reopen if you still
have issue with the stable Fedora 28 release.

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