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* cuda : route sm70 to the Turing MMVQ nwarps table Volta (sm_70) has no MMVQ parameter table of its own and falls through to GENERIC, which launches K-quant batch-1 decode (ncols_dst == 1) at nwarps=4. sm_70 shares TURING's tuning: the K-quant vec_dot prefers nwarps=2 there. Route sm_70 to the existing MMVQ_PARAMETERS_TURING table in both the device and the host table selector. Measured on one Tesla V100 32GB PCIe (PG500-216, driver 580.178.04, CUDA 12.0.140) with Qwen3.8-27B Q4_K_M, tg128, interleaved A/B in 6 ABBA blocks with paired per-block deltas: +1.091 t/s = +3.17 % (t = +49.0, all six per-block deltas positive); perplexity bit-identical (6.3697 +/- 0.04066 both builds, wiki.test.raw). The patched build's K-quant mul_mat_vec_q kernels launch at nwarps=2 (cubin EIATTR_MAX_THREADS) while Q4_0/Q8_0 stay at nwarps=4, and the same measurement on the September master base gave +3.84 % (t = 85). The tuning originates from the V100-focused fork anyei/llamacpp-v100 (MIT), commit b912d1b1e, which carries a dedicated MMVQ_PARAMETERS_VOLTA table; a cubin-level comparison confirmed that routing sm_70 to the existing TURING table is equivalent for the K-quant batch-1 path this change affects, so this is the minimal 2-line form. https://github.com/anyei/llamacpp-v100/commit/b912d1b1e Original-patch-by: anyei <angelyoelroblesmercedes@gmail.com> * Update ggml/src/ggml-cuda/mmvq.cu --------- Co-authored-by: tkittich <tkittich@gmail.com> Co-authored-by: Johannes Gäßler <johannesg@5d6.de>
llama.cpp
LLM inference in C/C++
ggml / ops / maintainer PRs / dev stats / lib llama API / llama-server REST API
Quick start
A few options to get llama.cpp installed on your machine:
- Visit https://llama.app and follow the instructions
- Run with Docker - see our Docker documentation
- Download pre-built binaries from the releases page
- Build from source by cloning this repository - check out our build guide
Once installed:
# Download and run a model directly from Hugging Face
llama cli -hf ggml-org/Qwen3.5-0.8B-GGUF
# Launch OpenAI-compatible API server
llama serve -hf ggml-org/Qwen3.5-0.8B-GGUF
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Description
The main goal of llama.cpp is to enable LLM (and VLM) inference with minimal setup and state-of-the-art performance on
a wide range of hardware - locally and in the cloud.
- Plain C/C++ implementation without any dependencies
- Apple silicon is a first-class citizen - optimized via ARM NEON, Accelerate and Metal frameworks
- AVX, AVX2, AVX512 and AMX support for x86 architectures
- RVV, ZVFH, ZFH, ZICBOP and ZIHINTPAUSE support for RISC-V architectures
- 1.5-bit, 2-bit, 3-bit, 4-bit, 5-bit, 6-bit, and 8-bit integer quantization for faster inference and reduced memory use
- Custom CUDA kernels for running LLMs on NVIDIA GPUs (support for AMD GPUs via HIP and Moore Threads GPUs via MUSA)
- Vulkan and SYCL backend support
- CPU+GPU hybrid inference to partially accelerate models larger than the total VRAM capacity
The llama.cpp project is build on top of the ggml library.
Supported backends
| Backend | Target devices |
|---|---|
| BLAS | All |
| BLIS | All |
| CANN | Ascend NPU |
| CUDA | Nvidia GPU |
| HIP | AMD GPU |
| Hexagon | Snapdragon |
| IBM zDNN | IBM Z & LinuxONE |
| MUSA | Moore Threads GPU |
| Metal | Apple Silicon |
| OpenCL | Adreno GPU |
| OpenVINO [In Progress] | Intel CPUs, GPUs, and NPUs |
| RPC | All |
| SYCL | Intel GPU |
| VirtGPU | VirtGPU APIR |
| Vulkan | GPU |
| WebGPU | All |
| ZenDNN | AMD CPU |
Documentation
Tools
Development
- How to build
- Running on Docker
- Build on Android
- Multi-GPU usage
- Performance troubleshooting
- GGML tips & tricks
- XCFramework
- Completions
- Models
- Release process
Contributing
- Contributors can open PRs
- Collaborators will be invited based on contributions
- Maintainers can push to branches in the
llama.cpprepo and merge PRs into themasterbranch - Any help with managing issues, PRs and projects is very appreciated!
- Read the CONTRIBUTING.md for more information
Acknowledgements
- yhirose/cpp-httplib - Single-header HTTP server, used by
llama-server- MIT license - nothings/stb - Single-header image format decoder, used by multimodal subsystem - Public domain
- nlohmann/json - Single-header JSON library, used by various tools/examples - MIT License
- mackron/miniaudio - Single-header audio format decoder, used by multimodal subsystem - Public domain
- sheredom/subprocess.h - Single-header process launching solution for C and C++ - Public domain