Merge pull request #542 from sixsixcoder/main

vLLM with LoRA adapter

README.md

@@ -11,6 +11,7 @@ Read this in [English](README_en.md)
 
 ## 项目更新
 
+- 🔥🔥 **News**: ```2024/09/04```: 增加了在 GLM-4-9B-Chat 模型上使用带有 Lora adapter 的 vLLM 演示代码
 - 🔥🔥 **News**: ```2024/08/15```: 我们开源具备长文本输出能力(单轮对话大模型输出可超过1万token)
   的模型 [longwriter-glm4-9b](https://huggingface.co/THUDM/LongWriter-glm4-9b)
   以及数据集 [LongWriter-6k](https://huggingface.co/datasets/THUDM/LongWriter-6k),

README_en.md

@@ -9,6 +9,7 @@
 
 ## Update
 
+- 🔥🔥 **News**: ```2024/09/04```: Add demo code for using vLLM with LoRA adapter on the GLM-4-9B-Chat model.
 - 🔥🔥 **News**: ```2024/08/15```: We have open-sourced a model with long-text output capability (single turn LLM output can exceed
   10K tokens) [longwriter-glm4-9b](https://huggingface.co/THUDM/LongWriter-glm4-9b) and the
   dataset [LongWriter-6k](https://huggingface.co/datasets/THUDM/LongWriter-6k). You're welcome

basic_demo/README.md

@@ -112,6 +112,13 @@ python trans_batch_demo.py
 python vllm_cli_demo.py
 ```
 
++ 在 GLM-4-9B-Chat 模型上使用带有 Lora adapter 的 vLLM
+```python
+# vllm_cli_demo.py
+# 添加 LORA_PATH = ''
+```
+
+  
 + 自行构建服务端，并使用 `OpenAI API` 的请求格式与 GLM-4-9B-Chat 模型进行对话。本 demo 支持 Function Call 和 All Tools功能。
 
 启动服务端：

basic_demo/README_en.md

@@ -117,6 +117,13 @@ python trans_batch_demo.py
 python vllm_cli_demo.py
 ```
 
++ use LoRA adapters with vLLM on GLM-4-9B-Chat model.
+
+```python
+# vllm_cli_demo.py
+# add LORA_PATH = ''
+```
+
 + Build the server by yourself and use the request format of `OpenAI API` to communicate with the glm-4-9b model. This
   demo supports Function Call and All Tools functions.
 

basic_demo/vllm_cli_demo.py

@@ -14,14 +14,16 @@ import asyncio
 from transformers import AutoTokenizer
 from vllm import SamplingParams, AsyncEngineArgs, AsyncLLMEngine
 from typing import List, Dict
+from vllm.lora.request import LoRARequest
 
 MODEL_PATH = 'THUDM/glm-4-9b-chat'
+LORA_PATH = ''
 
-
-def load_model_and_tokenizer(model_dir: str):
+def load_model_and_tokenizer(model_dir: str, enable_lora: bool):
     engine_args = AsyncEngineArgs(
         model=model_dir,
         tokenizer=model_dir,
+        enable_lora=enable_lora,
         tensor_parallel_size=1,
         dtype="bfloat16",
         trust_remote_code=True,
@@ -42,11 +44,14 @@ def load_model_and_tokenizer(model_dir: str):
     engine = AsyncLLMEngine.from_engine_args(engine_args)
     return engine, tokenizer
 
+enable_lora = False
+if LORA_PATH:
+    enable_lora = True
 
-engine, tokenizer = load_model_and_tokenizer(MODEL_PATH)
+engine, tokenizer = load_model_and_tokenizer(MODEL_PATH, enable_lora)
 
 
-async def vllm_gen(messages: List[Dict[str, str]], top_p: float, temperature: float, max_dec_len: int):
+async def vllm_gen(lora_path: str, enable_lora: bool, messages: List[Dict[str, str]], top_p: float, temperature: float, max_dec_len: int):
     inputs = tokenizer.apply_chat_template(
         messages,
         add_generation_prompt=True,
@@ -70,6 +75,10 @@ async def vllm_gen(messages: List[Dict[str, str]], top_p: float, temperature: fl
         "skip_special_tokens": True,
     }
     sampling_params = SamplingParams(**params_dict)
+    if enable_lora:
+        async for output in engine.generate(inputs=inputs, sampling_params=sampling_params, request_id=f"{time.time()}", lora_request=LoRARequest("glm-4-lora", 1, lora_path=lora_path)):
+            yield output.outputs[0].text
+    else:
         async for output in engine.generate(inputs=inputs, sampling_params=sampling_params, request_id=f"{time.time()}"):
             yield output.outputs[0].text
 
@@ -100,7 +109,7 @@ async def chat():
         print("\nGLM-4: ", end="")
         current_length = 0
         output = ""
-        async for output in vllm_gen(messages, top_p, temperature, max_length):
+        async for output in vllm_gen(LORA_PATH, enable_lora, messages, top_p, temperature, max_length):
             print(output[current_length:], end="", flush=True)
             current_length = len(output)
         history[-1][1] = output