[Bug 108820] [SKL] GPU hangs in benchmarks using compute shaders with drm-tip v4.20-rc kernels

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Jan 8 20:33:50 UTC 2019


--- Comment #11 from Jakub Okoński <jakub at okonski.org> ---
I don't know about these other applications, I've been experiencing this issue
in my own vulkan app. I had time today to mess around a bit more. First I
removed my dispatches and it worked fine, then I brought them back and started
simplifying my compute shader.

So far, I've been able to isolate the issue to a single `barrier()` GLSL call
near the end of my shader. I have another barrier earlier -
`memoryBarrierShared()` and it doesn't cause any issues. Perhaps this is
isolated to control flow barriers in compute shaders?

I am preparing my code to serve as a repro case, I should have it soon, but I
use a Rust toolchain so it might not be the easiest.

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