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Daniel Han
36b1015438
* qwen4exp: follow up fixes * -kvu NaN collapse fix Assisted-by: Claude * indexer cache ext.x/ext.y restore fix Assisted-by: Claude * kv-cells: rename seq_set to seq_get_all seq_get is already taken by the single-id getter, so the suggested name cannot be overloaded on return type alone. Assisted-by: Claude * memory-hybrid-idx: implement set_input_qsa on the memory class The context held the whole implementation, where the pattern elsewhere is a thin context forwarding to the memory class, as llama_kv_cache_context does for set_input_kq_mask. The body reads no context state, so it moves unchanged and the context keeps a forwarder. Also shortens the seq_get_all comment as suggested. * tests: check that a sequence state survives a save/restore round-trip Saves seq 0, erases it, restores the blob and saves again, requiring the two blobs to match. Compares blobs rather than generated text, which cannot see a field dropped on the way back in. Note this passes on master for qwen4exp, so it does not demonstrate the ext.x/ext.y drop this PR fixes; reaching that needs 2D mrope content. * tests: give the synthetic qwen4exp a PLE so the state test bites has_cell_ext() is n_pos_per_embd() > 1 || ple_n_heads > 0, and the indexer cache sets rope_type = NONE, so without a PLE it serializes no cell ext at all and the round-trip test cannot see a dropped ext.x/ext.y. With one, removing the ext_set restore in state_read_meta fails the test: 198 of 335692 bytes differ, first at offset 282092. Loading such a model needed two fixes: - the row count of per_layer_token_embd came from require_weight(), which a model synthesised from metadata alone has no file to answer. Derive it from the head ranges and prefer the file's padded count where there is one. - the PLE conv history is a row of the recurrent cache, so a PLE on a full attention layer dereferenced a null p_l. Reject it at load time instead. The meta mirror is skipped for qwen4exp. It returned NaN logits before this fixture carried a PLE, which the nmse check passes since a NaN comparison is false, and aborts with one. -sm tensor on real devices works. Assisted-by: Claude * llama: disable -sm tensor for qwen4exp test-llama-archs skipped the tensor split for this arch from inside the test, so the arch still advertised support it does not have. Declare it in llm_arch_supports_sm_tensor instead and drop the test-side exception; the existing llm_arch_supports_sm_tensor branch then does the skipping. Assisted-by: Claude
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 [In Progress] | 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