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Fastllm Python Demo Parameter Explanation

General Parameters

Configuration related to the model, OpenAI API Server, WebUI, and conversation demo can all use these parameters.

  • Model Path (-p, --path): Specifies the path to the model, which can be a fastllm model file or a Hugging Face model directory. For example: 
    --path ~/Qwen2-7B-Instruct/ # Reads the model from ~/Qwen2-7B-Instruct/, where the model needs to be a standard Hugging Face format model downloaded from HuggingFace, ModelScope, or other websites. Formats like AWQ, GPTQ, etc., are currently not supported.
--path ~/model.flm # Reads the model from ~/model.flm, where the model is a Fastllm format model file
  • Inference Type (--atype): Sets the intermediate computation type, which can be specified as float16 or float32.
  • Weight Type (--dtype): Specifies the weight type of the model, applicable when reading Hugging Face models. It can be specified as float16, int8, int4, int4g (int4 grouped quantization), for example: 
    --dtype float16  # Uses float16 weights (no quantization)
--dtype int8     # Quantizes to int8 weights online
--dtype int4g128 # Quantizes to int4 grouped weights online (128 weights per group)
--dtype int4g256 # Quantizes to int4 grouped weights online (256 weights per group)
--dtype int4     # Quantizes to int4 weights online
  • Device to Use (--device): Specifies the device used by the server. It can be specified as cpu, cuda, or other device types compiled additionally.
  • CUDA Embedding (--cuda_embedding): If this configuration is included and the device is set to cuda, embedding operations will be performed on the cuda device, slightly increasing speed and GPU memory usage. It is recommended to use this when there is ample GPU memory.
  • KV Cache Maximum Usage (--kv_cache_limit): Sets the maximum usage for the KV cache. If this parameter is not used or set to auto, the framework will handle it automatically. Manual settings examples are as follows: 
    --kv_cache_limit 5G   # Sets to 5G
--kv_cache_limit 100M # Sets to 100M
--kv_cache_limit 168K # Sets to 168K
  • Maximum Batch Size (--max_batch): Sets the number of requests processed simultaneously each time. If this parameter is not used, the framework will handle it automatically.
  • Number of Threads (-t, --threads): Sets the number of CPU threads, which significantly affects speed when the device is set to cpu, and has a smaller impact when set to cuda, mainly affecting the speed of model loading.
  • Custom Model Description File (--custom): Specifies the Python file describing the custom model. See Custom Model for details.

OpenAI API Server Configuration Parameters

  • Model Name (--model_name): Specifies the name of the deployed model, which will be verified during API calls.
  • API Server Host Address (--host): Sets the host address of the API server.
  • API Server Port Number (--port): Sets the port number of the API server.

Web UI Configuration Parameters

  • API Server Port Number (--port): Sets the port number for the WebUI.
  • Page Title (--title): Sets the page title for the WebUI.