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v3dv: bump maxComputeSharedMemorySize to 32 KB

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Currently local shared memory is backed by a BO that is read/written
using the TMU.

ggml-vulkan probes the size of maxComputeSharedMemorySize and rejects
V3DV (falling back to CPU) when the value is below what its larger
compute pipelines request, although in the end the shaders ollama
runs don't actually use shared memory.

32 KB is what ggml-vulkan demands; the value can grow further with no
real per-op cost since shared memory currently goes through the TMU
like any other BO.

V3D OpenGL driver also has 32 KB for SharedMemory.

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/41257>
This commit is contained in:
Jose Maria Casanova Crespo 2026-04-22 16:46:07 +02:00 • committed by Marge Bot
parent ee5daf590b
commit e378a7d773
1 changed files with 1 additions and 1 deletions
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2
src/broadcom/vulkan/v3dv_device.c
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@ -1020,7 +1020,7 @@ get_device_properties(const struct v3dv_physical_device *device,
MAX_STORAGE_IMAGES,
/* Compute limits */
.maxComputeSharedMemorySize = 16384,
.maxComputeSharedMemorySize = 32u * 1024u,
.maxComputeWorkGroupCount = { 65535, 65535, 65535 },
.maxComputeWorkGroupInvocations = 256,
.maxComputeWorkGroupSize = { 256, 256, 256 },