💻 programming

FlashInfer

FlashInfer is a high-performance GPU kernel library for serving large language models.

#programming
#LLM
#high performance computing
#GPU
#attention mechanism
FlashInfer

Product Details

FlashInfer is a high-performance GPU kernel library designed for serving large language models (LLM). It significantly improves the performance of LLM in inference and deployment by providing efficient sparse/dense attention mechanism, load balancing scheduling, memory efficiency optimization and other functions. FlashInfer supports PyTorch, TVM and C++ API, making it easy to integrate into existing projects. Its main advantages include efficient kernel implementation, flexible customization capabilities and broad compatibility. The development background of FlashInfer is to meet the growing needs of LLM applications and provide more efficient and reliable inference support.

Main Features

1
Efficient sparse/dense attention kernel: supports single and batch attention calculations of sparse and dense KV storage, enabling high performance on CUDA cores and Tensor cores.
2
Load-balancing scheduling: By decoupling the planning and execution phases of attention calculations, the calculation scheduling of variable-length inputs is optimized to reduce load imbalance problems.
3
Memory efficiency optimization: Provides cascading attention mechanism, supports hierarchical KV cache, and achieves efficient memory utilization.
4
Custom attention mechanism: Supports user-defined attention variants through JIT compilation.
5
Compatible with CUDAGraph and torch.compile: FlashInfer kernels can be captured by CUDAGraphs and torch.compile for low-latency inference.
6
Efficient LLM-specific operations: Provides high-performance Top-P, Top-K/Min-P sampling fusion kernels without sorting operations.
7
Supports multiple APIs: supports PyTorch, TVM and C++ (header file) APIs to facilitate integration into different projects.

How to Use

1
1. Install FlashInfer: Select the appropriate precompiled wheel to install according to the system and CUDA version, or build from source code.
2
2. Import the FlashInfer library: Import the FlashInfer module in the Python script.
3
3. Prepare input data: Generate or load the input data required for attention calculation.
4
4. Call FlashInfer’s API: Use the API provided by FlashInfer to perform attention calculations or other operations.
5
5. Obtain results: Process and analyze calculation results and apply them to specific application scenarios.

Target Users

FlashInfer is suitable for developers and researchers who require high-performance LLM inference and deployment, especially those that require large-scale language model inference on GPUs.

Examples

In natural language processing tasks, FlashInfer is used to accelerate the inference process of large language models and improve model response speed.

In machine translation applications, the attention mechanism of the FlashInfer optimization model is used to improve translation quality and efficiency.

In the intelligent question and answer system, FlashInfer's efficient core is used to achieve fast text generation and retrieval functions.

Quick Access

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Categories

💻 programming
› Development and Tools
› Model training and deployment

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