mirror of
https://github.com/ggml-org/llama.cpp.git
synced 2026-06-27 23:50:20 -05:00
19620004f5
Q2_K/Q3_K/Q6_K do much better when using MMVQ on Intel BMG even though they're only 2-byte aligned, and Q3_K still wins on NVIDIA as well. mesa isn't all that great at coalescing back-to-back loads from alternating arrays, so we force it instead. Further, we can do subtraction directly on a full int32_t rather than an i8vec4 with bit twiddling because the high bit is always free to start. On Intel BMG on mesa, the switch to MMVQ provides an immediate ~57% perf increase in tg128 for unsloth/Qwen3.5-9B-GGUF:Q3_K and ~78% perf increase in tg128 for unsloth/Qwen3.5-9B-GGUF:Q6_K. The futher switch to block loads leads to a ~24% perf increase in tg128 for unsloth/Qwen3.5-9B-GGUF:Q3_K and a ~48% perf increase in tg128 for unsloth/Qwen3.5-9B-GGUF:Q6_K. Finally, Xe2 wins on MMVQ even for small k, so we take the NVIDIA override for K quants on Xe2 as well.