Add support for falcon (#175)

We can set QUANTIZE_QLORA=True in the .env file to enable falcon's
quantization model

.env.template

@@ -21,7 +21,7 @@ LLM_MODEL=vicuna-13b
 MODEL_SERVER=http://127.0.0.1:8000
 LIMIT_MODEL_CONCURRENCY=5
 MAX_POSITION_EMBEDDINGS=4096
-
+QUANTIZE_QLORA=True
 ## SMART_LLM_MODEL - Smart language model (Default: vicuna-13b)
 ## FAST_LLM_MODEL - Fast language model (Default: chatglm-6b)
 # SMART_LLM_MODEL=vicuna-13b

pilot/configs/model_config.py

@@ -35,6 +35,7 @@ LLM_MODEL_CONFIG = {
     "chatglm-6b": os.path.join(MODEL_PATH, "chatglm-6b"),
     "text2vec-base": os.path.join(MODEL_PATH, "text2vec-base-chinese"),
     "guanaco-33b-merged": os.path.join(MODEL_PATH, "guanaco-33b-merged"),
+    "falcon-40b": os.path.join(MODEL_PATH, "falcon-40b"),
     "gorilla-7b": os.path.join(MODEL_PATH, "gorilla-7b"),
     "proxyllm": "proxyllm",
 }
@@ -42,7 +43,7 @@ LLM_MODEL_CONFIG = {
 # Load model config
 ISLOAD_8BIT = True
 ISDEBUG = False
-
+QLORA = os.getenv("QUANTIZE_QLORA") == "True"
 
 VECTOR_SEARCH_TOP_K = 10
 VS_ROOT_PATH = os.path.join(os.path.dirname(os.path.dirname(__file__)), "vs_store")

pilot/model/adapter.py

@@ -1,12 +1,13 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
-from functools import cache
+
+import torch
 from typing import List
-
+from functools import cache
-from transformers import AutoModel, AutoModelForCausalLM, AutoTokenizer, LlamaTokenizer
+from transformers import AutoModel, AutoModelForCausalLM, AutoTokenizer, LlamaTokenizer, BitsAndBytesConfig
-
 from pilot.configs.model_config import DEVICE
 
+bnb_config = BitsAndBytesConfig(load_in_4bit=True, bnb_4bit_quant_type="nf4", bnb_4bit_compute_dtype="bfloat16", bnb_4bit_use_double_quant=False)
 
 class BaseLLMAdaper:
     """The Base class for multi model, in our project.
@@ -97,16 +98,29 @@ class GuanacoAdapter(BaseLLMAdaper):
         return model, tokenizer
     
     
-class GuanacoAdapter(BaseLLMAdaper):
+class FalconAdapater(BaseLLMAdaper):
-    """TODO Support guanaco"""
+    """falcon Adapter"""
 
     def match(self, model_path: str):
-        return "guanaco" in model_path
+        return "falcon" in model_path
 
-    def loader(self, model_path: str, from_pretrained_kwargs: dict):
+    def loader(self, model_path: str, from_pretrained_kwagrs: dict):
-        tokenizer = LlamaTokenizer.from_pretrained(model_path)
+        tokenizer = AutoTokenizer.from_pretrained(model_path, use_fast=False)
+        if QLORA:
             model = AutoModelForCausalLM.from_pretrained(
-            model_path, load_in_4bit=True, device_map={"": 0}, **from_pretrained_kwargs
+                model_path, 
+                load_in_4bit=True, #quantize
+                quantization_config=bnb_config, 
+                device_map={"": 0}, 
+                trust_remote_code=True, 
+                **from_pretrained_kwagrs
+            )
+        else:
+            model = AutoModelForCausalLM.from_pretrained(
+                model_path, 
+                trust_remote_code=True,
+                device_map={"": 0},
+                **from_pretrained_kwagrs
             )
         return model, tokenizer
     
@@ -180,6 +194,7 @@ class ProxyllmAdapter(BaseLLMAdaper):
 register_llm_model_adapters(VicunaLLMAdapater)
 register_llm_model_adapters(ChatGLMAdapater)
 register_llm_model_adapters(GuanacoAdapter)
+register_llm_model_adapters(FalconAdapater)
 register_llm_model_adapters(GorillaAdapter)
 # TODO Default support vicuna, other model need to tests and Evaluate
 

pilot/model/llm_out/falcon_llm.py

@@ -0,0 +1,54 @@
+import torch
+import copy
+from threading import Thread
+from transformers import TextIteratorStreamer, StoppingCriteriaList, StoppingCriteria
+
+
+def falcon_generate_output(model, tokenizer, params, device, context_len=2048):
+    """Fork from: https://github.com/KohakuBlueleaf/guanaco-lora/blob/main/generate.py"""
+    tokenizer.bos_token_id = 1
+    print(params)
+    stop = params.get("stop", "###")
+    prompt = params["prompt"]
+    query = prompt
+    print("Query Message: ", query)
+
+    input_ids = tokenizer(query, return_tensors="pt").input_ids
+    input_ids = input_ids.to(model.device)
+
+    streamer = TextIteratorStreamer(
+        tokenizer, timeout=10.0, skip_prompt=True, skip_special_tokens=True
+    )
+    
+    tokenizer.bos_token_id = 1
+    stop_token_ids = [0]
+
+    class StopOnTokens(StoppingCriteria):
+        def __call__(
+            self, input_ids: torch.LongTensor, scores: torch.FloatTensor, **kwargs
+        ) -> bool:
+            for stop_id in stop_token_ids:
+                if input_ids[0][-1] == stop_id:
+                    return True
+            return False
+
+    stop = StopOnTokens()
+
+    generate_kwargs = dict(
+        input_ids=input_ids,
+        max_new_tokens=512,
+        temperature=1.0,
+        do_sample=True,
+        top_k=1,
+        streamer=streamer,
+        repetition_penalty=1.7,
+        stopping_criteria=StoppingCriteriaList([stop]),
+    )
+
+    t = Thread(target=model.generate, kwargs=generate_kwargs)
+    t.start()
+
+    out = ""
+    for new_text in streamer:
+        out += new_text
+        yield out

pilot/server/chat_adapter.py

@@ -3,7 +3,6 @@
 
 from functools import cache
 from typing import List
-
 from pilot.model.llm_out.vicuna_base_llm import generate_stream
 
 
@@ -95,16 +94,17 @@ class GuanacoChatAdapter(BaseChatAdpter):
 
         return guanaco_generate_stream
 
-class GorillaChatAdapter(BaseChatAdpter):
+   
+class FalconChatAdapter(BaseChatAdpter):
     """Model chat adapter for Guanaco"""
 
     def match(self, model_path: str):
-        return "gorilla" in model_path
+        return "falcon" in model_path
 
     def get_generate_stream_func(self):
-        from pilot.model.llm_out.gorilla_llm import generate_stream
+        from pilot.model.llm_out.falcon_llm import falcon_generate_output
 
-        return generate_stream
+        return falcon_generate_output
     
 class ProxyllmChatAdapter(BaseChatAdpter):
     def match(self, model_path: str):
@@ -119,6 +119,7 @@ class ProxyllmChatAdapter(BaseChatAdpter):
 register_llm_model_chat_adapter(VicunaChatAdapter)
 register_llm_model_chat_adapter(ChatGLMChatAdapter)
 register_llm_model_chat_adapter(GuanacoChatAdapter)
+register_llm_model_adapters(FalconChatAdapter)
 register_llm_model_chat_adapter(GorillaChatAdapter)
 
 # Proxy model for test and develop, it's cheap for us now.