Tobim6
1610ab6e08
Write each word of a mesh fallback draw's record with exactly one command, and with fills and copies only.
...
The record was a fill of the whole record with 1 followed by fills and copies into parts of it, with no barrier between them: transfer writes to the same bytes, which the GPU may run in any order. On an RX 580 the vertex count, the first vertex or instance or the task count was the fill's 1 in about half the draws, and the foliage the mesh programs draw flashed, missing or white from the wrong slots. The record is now built as words first and written as fills of runs that do not overlap, with the count the GPU wrote copied into the words left out for it.
No vkCmdUpdateBuffer: it is not among the recorder thread's commands (vk_rec.h), so with the recorder on (an AMD card without mesh shaders in the low-end GPU mode) the call went to the driver from the replay thread while the recorder recorded the same command buffer, and amdvlk64.dll ended with an access violation at the first fallback draw.
Two commits by Tobim6 from the public repository (2d988e36 and 8ee0ca9d), applied to this line as one. Not run here: no card in this PC takes the fallback. The file compiles.
Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com >
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