Garlic Inference Guide

Garlic Inference is an open-source project developed and maintained by NikolayBlagoev, released on GitHub on June 12, 2026 (link: https://github.com/NikolayBlagoev/garlic-inference). Implemented in pure C++ and CUDA, this project focuses on high-performance optimization for LLM inference, supporting quantized inference and power consumption analysis. It provides a lightweight solution for developers pursuing extreme inference speed and serves as an experimental platform to explore inference optimization techniques.

Project Background and Positioning

Most mainstream LLM inference frameworks are based on Python (e.g., Transformers, vLLM), which incur performance overheads such as dynamic typing and garbage collection. Starting from the bottom layer, Garlic Inference is built with pure C++ to break through the performance limits of LLM inference. It also serves as an experimental platform to test various inference optimization techniques, filling the gap in the demand for lightweight, high-performance inference engines.

Core Technologies and Optimization

1. Pure C++ Advantages: Precise memory control, high native code execution efficiency, and tight integration with CUDA;
2. CUDA Acceleration: Maximize GPU utilization through kernel fusion, shared memory optimization, and stream scheduling;
3. Quantized Inference: Supports FP8 quantization to reduce model size and computational load;
4. Performance Optimization: Strategies like memory pre-allocation/pooling, computational graph operator fusion, batching, and pipelining to improve efficiency.

Experiments and Validation

• Test Cases: Provides qwen_test.cpp and qwen_test_fp8.cpp to verify the engine's correctness and demonstrate model usage methods;
• Power Consumption Analysis: Includes the power_profiler.py script to monitor the energy consumption characteristics of the model during runtime;
• Quantization Experiments: qwen_test_fp8.cpp indicates that FP8 inference experiments for the Qwen model are ongoing.

Application Scenarios

1. Edge Devices: Low memory footprint and no Python dependency, suitable for resource-constrained devices like Raspberry Pi and Jetson;
2. High-Throughput Services: High single-card throughput, reducing GPU resource costs;
3. Research Experiments: The concise codebase facilitates rapid verification of new optimization techniques (e.g., quantization algorithms, memory strategies).

Comparison with Mainstream Frameworks

Compared to mature frameworks like PyTorch and TensorRT, Garlic Inference focuses more on LLM inference optimization, with concise and targeted code. However, it requires users to handle underlying tasks such as model conversion and operator implementation themselves. It is suitable for scenarios where extreme performance is pursued and development costs are willing to be invested.

Summary and Recommendations

Garlic Inference represents an important direction in LLM inference optimization: using low-level languages to extract the extreme performance of hardware. Although it is in the experimental stage, it has reference value for understanding performance bottlenecks and developing customized solutions. It is recommended that C++ developers, performance engineers, and edge AI practitioners pay attention to and participate in this project to explore more efficient inference technologies.