"""Benchmark offline inference throughput.""" import argparse import json import random import time from typing import List, Optional, Tuple import torch from transformers import (AutoModelForCausalLM, AutoTokenizer, PreTrainedTokenizerBase) from tqdm import tqdm def sample_requests( dataset_path: str, num_requests: int, tokenizer: PreTrainedTokenizerBase, fixed_output_len: Optional[int], ) -> List[Tuple[str, int, int]]: if fixed_output_len is not None and fixed_output_len < 4: raise ValueError("output_len too small") # Load the dataset. with open(dataset_path) as f: dataset = json.load(f) # Filter out the conversations with less than 2 turns. dataset = [data for data in dataset if len(data["conversations"]) >= 2] # Only keep the first two turns of each conversation. dataset = [(data["conversations"][0]["value"], data["conversations"][1]["value"]) for data in dataset] # Tokenize the prompts and completions. prompts = [prompt for prompt, _ in dataset] prompt_token_ids = tokenizer(prompts).input_ids completions = [completion for _, completion in dataset] completion_token_ids = tokenizer(completions).input_ids tokenized_dataset = [] for i in range(len(dataset)): output_len = len(completion_token_ids[i]) if fixed_output_len is not None: output_len = fixed_output_len tokenized_dataset.append((prompts[i], prompt_token_ids[i], output_len)) # Filter out too long sequences. filtered_dataset: List[Tuple[str, int, int]] = [] for prompt, prompt_token_ids, output_len in tokenized_dataset: prompt_len = len(prompt_token_ids) if prompt_len < 4 or output_len < 4: # Prune too short sequences. continue if prompt_len > 1024 or prompt_len + output_len > 2048: # Prune too long sequences. continue filtered_dataset.append((prompt, prompt_len, output_len)) # Sample the requests. sampled_requests = random.sample(filtered_dataset, num_requests) return sampled_requests def run_vllm( requests: List[Tuple[str, int, int]], model: str, tokenizer: str, quantization: Optional[str], tensor_parallel_size: int, seed: int, n: int, use_beam_search: bool, trust_remote_code: bool, dtype: str, max_model_len: Optional[int] = None, ) -> float: from vllm import LLM, SamplingParams llm = LLM( model=model, tokenizer=tokenizer, quantization=quantization, tensor_parallel_size=tensor_parallel_size, seed=seed, trust_remote_code=trust_remote_code, dtype=dtype, max_model_len=max_model_len, ) # Add the requests to the engine. for prompt, _, output_len in requests: sampling_params = SamplingParams( n=n, temperature=0.0 if use_beam_search else 1.0, top_p=1.0, use_beam_search=use_beam_search, ignore_eos=True, max_tokens=output_len, ) # FIXME(woosuk): Do not use internal method. llm._add_request( prompt=prompt, prompt_token_ids=None, sampling_params=sampling_params, ) start = time.perf_counter() # FIXME(woosuk): Do not use internal method. llm._run_engine(use_tqdm=True) end = time.perf_counter() return end - start def run_hf( requests: List[Tuple[str, int, int]], model: str, tokenizer: PreTrainedTokenizerBase, n: int, use_beam_search: bool, max_batch_size: int, trust_remote_code: bool, ) -> float: assert not use_beam_search llm = AutoModelForCausalLM.from_pretrained( model, torch_dtype=torch.float16, trust_remote_code=trust_remote_code) if llm.config.model_type == "llama": # To enable padding in the HF backend. tokenizer.pad_token = tokenizer.eos_token llm = llm.cuda() pbar = tqdm(total=len(requests)) start = time.perf_counter() batch: List[str] = [] max_prompt_len = 0 max_output_len = 0 for i in range(len(requests)): prompt, prompt_len, output_len = requests[i] # Add the prompt to the batch. batch.append(prompt) max_prompt_len = max(max_prompt_len, prompt_len) max_output_len = max(max_output_len, output_len) if len(batch) < max_batch_size and i != len(requests) - 1: # Check if we can add more requests to the batch. _, next_prompt_len, next_output_len = requests[i + 1] if (max(max_prompt_len, next_prompt_len) + max(max_output_len, next_output_len)) <= 2048: # We can add more requests to the batch. continue # Generate the sequences. input_ids = tokenizer(batch, return_tensors="pt", padding=True).input_ids llm_outputs = llm.generate( input_ids=input_ids.cuda(), do_sample=not use_beam_search, num_return_sequences=n, temperature=1.0, top_p=1.0, use_cache=True, max_new_tokens=max_output_len, ) # Include the decoding time. tokenizer.batch_decode(llm_outputs, skip_special_tokens=True) pbar.update(len(batch)) # Clear the batch. batch = [] max_prompt_len = 0 max_output_len = 0 end = time.perf_counter() return end - start def run_mii( requests: List[Tuple[str, int, int]], model: str, tensor_parallel_size: int, output_len: int, ) -> float: from mii import pipeline llm = pipeline(model, tensor_parallel=tensor_parallel_size) prompts = [prompt for prompt, _, _ in requests] start = time.perf_counter() llm(prompts, max_new_tokens=output_len) end = time.perf_counter() return end - start def main(args: argparse.Namespace): print(args) random.seed(args.seed) # Sample the requests. tokenizer = AutoTokenizer.from_pretrained( args.tokenizer, trust_remote_code=args.trust_remote_code) if args.dataset is None: # Synthesize a prompt with the given input length. prompt = "hi" * (args.input_len - 1) requests = [(prompt, args.input_len, args.output_len) for _ in range(args.num_prompts)] else: requests = sample_requests(args.dataset, args.num_prompts, tokenizer, args.output_len) if args.backend == "vllm": elapsed_time = run_vllm(requests, args.model, args.tokenizer, args.quantization, args.tensor_parallel_size, args.seed, args.n, args.use_beam_search, args.trust_remote_code, args.dtype, args.max_model_len) elif args.backend == "hf": assert args.tensor_parallel_size == 1 elapsed_time = run_hf(requests, args.model, tokenizer, args.n, args.use_beam_search, args.hf_max_batch_size, args.trust_remote_code) elif args.backend == "mii": elapsed_time = run_mii(requests, args.model, args.tensor_parallel_size, args.output_len) else: raise ValueError(f"Unknown backend: {args.backend}") total_num_tokens = sum(prompt_len + output_len for _, prompt_len, output_len in requests) print(f"Throughput: {len(requests) / elapsed_time:.2f} requests/s, " f"{total_num_tokens / elapsed_time:.2f} tokens/s") if __name__ == "__main__": parser = argparse.ArgumentParser(description="Benchmark the throughput.") parser.add_argument("--backend", type=str, choices=["vllm", "hf", "mii"], default="vllm") parser.add_argument("--dataset", type=str, default=None, help="Path to the dataset.") parser.add_argument("--input-len", type=int, default=None, help="Input prompt length for each request") parser.add_argument("--output-len", type=int, default=None, help="Output length for each request. Overrides the " "output length from the dataset.") parser.add_argument("--model", type=str, default="facebook/opt-125m") parser.add_argument("--tokenizer", type=str, default=None) parser.add_argument('--quantization', '-q', choices=['awq', 'squeezellm', None], default=None) parser.add_argument("--tensor-parallel-size", "-tp", type=int, default=1) parser.add_argument("--n", type=int, default=1, help="Number of generated sequences per prompt.") parser.add_argument("--use-beam-search", action="store_true") parser.add_argument("--num-prompts", type=int, default=1000, help="Number of prompts to process.") parser.add_argument("--seed", type=int, default=0) parser.add_argument("--hf-max-batch-size", type=int, default=None, help="Maximum batch size for HF backend.") parser.add_argument('--trust-remote-code', action='store_true', help='trust remote code from huggingface') parser.add_argument( '--max-model-len', type=int, default=None, help='Maximum length of a sequence (including prompt and output). ' 'If None, will be derived from the model.') parser.add_argument( '--dtype', type=str, default='auto', choices=['auto', 'half', 'float16', 'bfloat16', 'float', 'float32'], help='data type for model weights and activations. ' 'The "auto" option will use FP16 precision ' 'for FP32 and FP16 models, and BF16 precision ' 'for BF16 models.') args = parser.parse_args() if args.tokenizer is None: args.tokenizer = args.model if args.dataset is None: assert args.input_len is not None assert args.output_len is not None else: assert args.input_len is None if args.backend == "vllm": if args.hf_max_batch_size is not None: raise ValueError("HF max batch size is only for HF backend.") elif args.backend == "hf": if args.hf_max_batch_size is None: raise ValueError("HF max batch size is required for HF backend.") if args.quantization is not None: raise ValueError("Quantization is only for vLLM backend.") elif args.backend == "mii": if args.dtype != "auto": raise ValueError("dtype must be auto for MII backend.") if args.n != 1: raise ValueError("n must be 1 for MII backend.") if args.use_beam_search: raise ValueError("Beam search is not supported for MII backend.") if args.quantization is not None: raise ValueError("Quantization is only for vLLM backend.") if args.hf_max_batch_size is not None: raise ValueError("HF max batch size is only for HF backend.") if args.tokenizer != args.model: raise ValueError("Tokenizer must be the same as the model for MII " "backend.") main(args)