b9452
vulkan: Block-load Q3_K/Q6_K block data and subtract on 32b ints (#23056)
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.
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 7.2)
- Ubuntu x64 (OpenVINO)
- Ubuntu x64 (SYCL FP32) DISABLED
Android:
Windows:
- Windows x64 (CPU)
- Windows arm64 (CPU)
- Windows x64 (CUDA 12) - CUDA 12.4 DLLs
- Windows x64 (CUDA 13) - CUDA 13.3 DLLs
- Windows x64 (Vulkan)
- Windows x64 (SYCL) DISABLED
- Windows x64 (HIP)
openEuler:
- DISABLED
- openEuler x86 (310p)
- openEuler x86 (910b, ACL Graph)
- openEuler aarch64 (310p)
- openEuler aarch64 (910b, ACL Graph)
UI: