#asahi-gpu on 2025-03-04 — irc logs at oftc.irclog.whitequark.org

2024-07-16 04:52 ChanServ changed the topic of #asahi-gpu to: Asahi Linux GPU development (no user support, NO binary reversing) | Keep things on topic | GitHub: https://alx.sh/g | Wiki: https://alx.sh/w | Logs: https://alx.sh/l/asahi-gpu

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19:13 <alyssa> investigating some of the weird uapi bits

19:13 <alyssa> `no_clear_pipeline_textures` is definitely not that

19:14 <alyssa> incorrectly setting this flag breaks a couple of cases in both the gl & vk cts when vertex clustering is enabled

19:14 <alyssa> (on g14x)

19:14 <alyssa> the GL case is super bizarre

19:14 <alyssa> KHR-GLES31.core.shader_storage_buffer_object.advanced-write-fragment-cs

19:14 <alyssa> 1. write a buffer from a compute shader

19:15 <alyssa> 2. read it as a vertex buffer

19:15 <alyssa> ..that's it

19:15 <alyssa> no matter how hard I barrier in between #1 and #2, without the bit the VS fails to read properly back

19:16 <alyssa> even with coherent load/stores

19:16 <alyssa> and straight up roundtripping userspace in between o.O

19:18 <alyssa> inserting a passthru GS does not solve. uhhhh. wat

19:19 <alyssa> utterly confused here

19:31 <alyssa> the VK case is weirder

19:31 <alyssa> dEQP-VK.memory.pipeline_barrier.host_write_vertex_buffer.1048576_vertex_buffer_stride_2

19:31 <alyssa> 1. write buffer from the host, seeminglY

19:31 <alyssa> 2. read it as a vertex buffer

19:31 <alyssa> ..that's it

19:33 <alyssa> so clearly something about vertex clustering + vertex shader reads

19:33 <alyssa> it's moments like these I really wish we didn't have to r/e everything, sigh

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