[Bug 97879] [amdgpu] Rocket League: long hangs (several seconds) when loading assets (models/textures/shaders?)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97879

--- Comment #57 from Vladislav Egorov <vegorov180 at gmail.com> ---
Simple way to reproduce the bug - launch the game, then go to "Options" menu
and get multi-second (>5s) freeze.

I've tried to launch Rocket League on several GPUs. Graphics settings were the
same everywhere. I wasn't able to reproduce the bug on i965 (Haswell), nouveau
(GT710) and llvmpipe, it takes maybe 1 second to load "Options" menu on these
drivers. I've reproduced the bug on radeonsi (R270X) and r600g (6930). The bug
is reproducible on both radeon+radeonsi and amdgpu+radeonsi on fresh 4.9
kernel.

So it's very unlikely it has anything to do with memory allocation or shader
compilation at all. Shader cache would not help either. Narrowing the circle of
suspects a bit more. LLVM can't be related, because the bug is reproducible on
r600. Gallium is unlikely related, because I don't see the bug on llvmpipe and
nouveau. That's something common to R600 and radeonsi.

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