ggml-cuda : disable MMQ on devices with less than 48 KiB shared memory (#26141) ggml_cuda_should_use_mmq() selects MMQ purely from the quantization type. The current MMQ configurations are designed and maintained against a minimum of 48 KiB per-block shared memory, the limit provided by NVIDIA Pascal GPUs and later. On devices that report less, no supported MMQ tile fits and mul_mat_q_switch_J() aborts when every tile size exceeds the device's per-block shared memory budget. Disable MMQ when smpbo 1) is affected; token generation is fine. After the fix the same device falls back to the BLAS path: Q8_0 pp128 1470.7 t/s, tg8 55.3 t/s (was: abort) FP16 unchanged Q4_K_M unchanged This matches a -DGGML_CUDA_FORCE_CUBLAS=ON build (pp128 1464.2 t/s), which confirms the fallback path is the one being taken.

This is not MUSA-specific: any device with less than 48 KiB per-block shared memory is affected. Co-authored-by: KakaruHayate Website: macOS/iOS: macOS Apple Silicon (arm64) macOS Apple Silicon (arm64, KleidiAI enabled) DISABLED macOS Intel (x64) iOS XCFramework Linux: Ubuntu x64 (CPU) Ubuntu arm64 (CPU) Ubuntu s390x (CPU) Ubuntu x64 (Vulkan) Ubuntu arm64 (Vulkan) Ubuntu x64 (ROCm…