from transformers import AutoModelForCausalLM, AutoTokenizer, TextStreamer, BitsAndBytesConfigimport torchimport osimport signalimport randomimport numpy as npimport timeimport sys if ( "PYTORCH_ALLOC_CONF" not in os.environ and "PYTORCH_CUDA_ALLOC_CONF" not in os.environ): print(f"PYTORCH_ALLOC_CONF.") os.environ["PYTORCH_ALLOC_CONF"] = "expandable_segments:True" cpu_count = os.cpu_count()print(f"Number of CPU cores in the system: {cpu_count}")half_cpu_count = cpu_count // 2os.environ["MKL_NUM_THREADS"] = str(half_cpu_count)os.environ["OMP_NUM_THREADS"] = str(half_cpu_count)torch.set_num_threads(half_cpu_count) print(f"PyTorch threads: {torch.get_num_threads()}")print(f"MKL threads: {os.getenv('MKL_NUM_THREADS')}")print(f"OMP threads: {os.getenv('OMP_NUM_THREADS')}") # Load the model and tokenizerMODEL_ID = "huihui-ai/Huihui-Qwen3-Coder-Next-abliterated" print(f"Load Model {MODEL_ID} ... ")quant_config_4 = BitsAndBytesConfig( load_in_4bit=True, bnb_4bit_compute_dtype=torch.bfloat16, bnb_4bit_use_double_quant=True, llm_int8_enable_fp32_cpu_offload=True,) model = AutoModelForCausalLM.from_pretrained( MODEL_ID, device_map="auto", trust_remote_code=True, torch_dtype="auto", low_cpu_mem_usage=True, quantization_config=quant_config_4,) tokenizer = AutoTokenizer.from_pretrained(MODEL_ID, trust_remote_code=True) messages = []skip_prompt=Trueskip_special_tokens=True class CustomTextStreamer(TextStreamer): def __init__(self, tokenizer, skip_prompt=True, skip_special_tokens=True): super().__init__(tokenizer, skip_prompt=skip_prompt, skip_special_tokens=skip_special_tokens) self.generated_text = "" self.stop_flag = False self.init_time = time.time() # Record initialization time self.end_time = None # To store end time self.first_token_time = None # To store first token generation time self.token_count = 0 # To track total tokens def on_finalized_text(self, text: str, stream_end: bool = False): if self.first_token_time is None and text.strip(): # Set first token time on first non-empty text self.first_token_time = time.time() self.generated_text += text self.token_count += 1 print(text, end="", flush=True) if stream_end: self.end_time = time.time() # Record end time when streaming ends if self.stop_flag: raise StopIteration def stop_generation(self): self.stop_flag = True self.end_time = time.time() # Record end time when generation is stopped def get_metrics(self): """Returns initialization time, first token time, first token latency, end time, total time, total tokens, and tokens per second.""" if self.end_time is None: self.end_time = time.time() # Set end time if not already set total_time = self.end_time - self.init_time # Total time from init to end tokens_per_second = self.token_count / total_time if total_time > 0 else 0 first_token_latency = (self.first_token_time - self.init_time) if self.first_token_time is not None else None metrics = { "init_time": self.init_time, "first_token_time": self.first_token_time, "first_token_latency": first_token_latency, "end_time": self.end_time, "total_time": total_time, # Total time in seconds "total_tokens": self.token_count, "tokens_per_second": tokens_per_second } return metrics def generate_stream(model, tokenizer, messages, skip_prompt, skip_special_tokens, max_new_tokens): text = tokenizer.apply_chat_template( messages, tokenize=False, add_generation_prompt=True, ) model_inputs = tokenizer( [text], return_tensors="pt", ).to(model.device) streamer = CustomTextStreamer(tokenizer, skip_prompt=skip_prompt, skip_special_tokens=skip_special_tokens) def signal_handler(sig, frame): streamer.stop_generation() print("\n[Generation stopped by user with Ctrl+C]") signal.signal(signal.SIGINT, signal_handler) print("Response: ", end="", flush=True) try: generated_ids = model.generate( **model_inputs, max_new_tokens = max_new_tokens, streamer=streamer, ) del generated_ids except StopIteration: print("\n[Stopped by user]") del model_inputs torch.cuda.empty_cache() signal.signal(signal.SIGINT, signal.SIG_DFL) return streamer.generated_text, streamer.stop_flag, streamer.get_metrics() while True: print(f"skip_prompt: {skip_prompt}") print(f"skip_special_tokens: {skip_special_tokens}") user_input = input("User: ").strip() if user_input.lower() == "/exit": print("Exiting chat.") break if user_input.lower() == "/clear": messages = [] print("Chat history cleared. Starting a new conversation.") continue if user_input.lower() == "/skip_prompt": skip_prompt = not skip_prompt continue if user_input.lower() == "/skip_special_tokens": skip_special_tokens = not skip_special_tokens continue if not user_input: print("Input cannot be empty. Please enter something.") continue messages.append({ "role": "user", "content": user_input }) response, stop_flag, metrics = generate_stream(model, tokenizer, messages, skip_prompt, skip_special_tokens, 40960) print("\n\nMetrics:") for key, value in metrics.items(): print(f" {key}: {value}") print("", flush=True) if stop_flag: continue messages.append({ "role": "assistant", "content": response.strip() })