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import gradio as gr
import torch
from transformers import AutoModelForCausalLM, AutoTokenizer, TextIteratorStreamer, BitsAndBytesConfig
import os
from threading import Thread
import spaces
import time
token = os.environ["HF_TOKEN"]
quantization_config = BitsAndBytesConfig(
load_in_4bit=True,
bnb_4bit_compute_dtype=torch.float16
)
model = AutoModelForCausalLM.from_pretrained("google/gemma-1.1-7b-it",
quantization_config=quantization_config,
token=token)
tok = AutoTokenizer.from_pretrained("google/gemma-1.1-7b-it", token=token)
if torch.cuda.is_available():
device = torch.device('cuda')
print(f"Using GPU: {torch.cuda.get_device_name(device)}")
else:
device = torch.device('cpu')
print("Using CPU")
model = model.to(device)
model = model.to_bettertransformer()
@spaces.GPU
def chat(message, history):
start_time = time.time()
chat = []
for item in history:
chat.append({"role": "user", "content": item[0]})
if item[1] is not None:
chat.append({"role": "assistant", "content": item[1]})
chat.append({"role": "user", "content": message})
messages = tok.apply_chat_template(chat, tokenize=False, add_generation_prompt=True)
model_inputs = tok([messages], return_tensors="pt").to(device)
streamer = TextIteratorStreamer(
tok, timeout=10., skip_prompt=True, skip_special_tokens=True)
generate_kwargs = dict(
model_inputs,
streamer=streamer,
max_new_tokens=1024,
do_sample=True,
top_p=0.95,
top_k=1000,
temperature=0.75,
num_beams=1,
)
t = Thread(target=model.generate, kwargs=generate_kwargs)
t.start()
partial_text = ""
first_token_time = None
for new_text in streamer:
if not first_token_time:
first_token_time = time.time() - start_time
partial_text += new_text
yield partial_text
total_time = time.time() - start_time
tokens = len(tok.tokenize(partial_text))
tokens_per_second = tokens / total_time if total_time > 0 else 0
# Append the timing information to the final output
timing_info = f"\nTime taken to first token: {first_token_time:.2f} seconds\nTokens per second: {tokens_per_second:.2f}"
yield partial_text + timing_info
demo = gr.ChatInterface(fn=chat, examples=[["Write me a poem about Machine Learning."]], title="Chat With LLMS")
demo.launch()
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