mirror of
https://github.com/NVIDIA/TensorRT-LLM.git
synced 2026-01-14 06:27:45 +08:00
402 lines
14 KiB
Python
402 lines
14 KiB
Python
# Adopted from
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# https://github.com/vllm-project/vllm/blob/200bbf92e8861e2458a6f90bca73f40cc3b1ad1f/benchmarks/backend_request_func.py
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# SPDX-License-Identifier: Apache-2.0
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import json
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import os
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import sys
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import time
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import traceback
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from dataclasses import dataclass, field
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from typing import Optional, Union
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import aiohttp
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from tqdm.asyncio import tqdm
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from transformers import (AutoTokenizer, PreTrainedTokenizer,
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PreTrainedTokenizerFast)
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AIOHTTP_TIMEOUT = aiohttp.ClientTimeout(total=6 * 60 * 60)
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@dataclass
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class RequestFuncInput:
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prompt: str
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api_url: str
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prompt_len: int
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output_len: int
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model: str
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model_name: Optional[str] = None
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logprobs: Optional[int] = None
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extra_body: Optional[dict] = None
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ignore_eos: bool = False
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language: Optional[str] = None
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@dataclass
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class RequestFuncOutput:
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generated_text: str = ""
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success: bool = False
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latency: float = 0.0
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output_tokens: int = 0
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ttft: float = 0.0 # Time to first token
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itl: list[float] = field(
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default_factory=list) # list of inter-token latencies
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tpot: float = 0.0 # avg next-token latencies
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prompt_len: int = 0
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error: str = ""
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async def async_request_trt_llm(
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request_func_input: RequestFuncInput,
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streaming: bool = True,
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pbar: Optional[tqdm] = None,
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session: Optional[aiohttp.ClientSession] = None,
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) -> RequestFuncOutput:
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api_url = request_func_input.api_url
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assert api_url.endswith("generate_stream")
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request_session = aiohttp.ClientSession(
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trust_env=True,
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timeout=AIOHTTP_TIMEOUT,
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connector=aiohttp.TCPConnector(
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limit=0, limit_per_host=0)) if session is None else session
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payload = {
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"accumulate_tokens": True,
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"text_input": request_func_input.prompt,
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"temperature": 0.0,
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"top_p": 1.0,
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"max_tokens": request_func_input.output_len,
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"stream": streaming,
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}
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if request_func_input.ignore_eos:
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payload["min_length"] = request_func_input.output_len
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output = RequestFuncOutput()
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output.prompt_len = request_func_input.prompt_len
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ttft = 0.0
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st = time.perf_counter()
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most_recent_timestamp = st
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try:
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async with request_session.post(url=api_url, json=payload) as response:
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if response.status == 200:
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output.success = True
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if streaming:
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async for chunk_bytes in response.content:
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chunk_bytes = chunk_bytes.strip()
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if not chunk_bytes:
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continue
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chunk = chunk_bytes.decode("utf-8").removeprefix(
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"data:")
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data = json.loads(chunk)
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output.generated_text += data["text_output"]
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timestamp = time.perf_counter()
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# First token
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if ttft == 0.0:
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ttft = timestamp - st
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output.ttft = ttft
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# Decoding phase
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else:
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output.itl.append(timestamp - most_recent_timestamp)
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most_recent_timestamp = timestamp
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output.latency = most_recent_timestamp - st
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else:
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content = await response.content.read()
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data = json.loads(content.decode())
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output.ttft = -1
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output.itl = []
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output.generated_text = data["text_output"]
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output.latency = time.perf_counter() - st
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else:
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output.error = response.reason or ""
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output.success = False
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except Exception:
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output.success = False
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exc_info = sys.exc_info()
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output.error = "".join(traceback.format_exception(*exc_info))
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finally:
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if session is None:
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await request_session.close()
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if pbar:
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pbar.update(1)
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return output
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async def async_request_openai_completions(
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request_func_input: RequestFuncInput,
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streaming: bool = True,
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pbar: Optional[tqdm] = None,
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session: Optional[aiohttp.ClientSession] = None,
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) -> RequestFuncOutput:
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api_url = request_func_input.api_url
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assert api_url.endswith(
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("completions", "profile")
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), "OpenAI Completions API URL must end with 'completions' or 'profile'."
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request_session = aiohttp.ClientSession(
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trust_env=True,
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timeout=AIOHTTP_TIMEOUT,
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connector=aiohttp.TCPConnector(
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limit=0, limit_per_host=0)) if session is None else session
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payload = {
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"model": request_func_input.model_name \
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if request_func_input.model_name else request_func_input.model,
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"prompt": request_func_input.prompt,
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"temperature": 0.0,
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"repetition_penalty": 1.0,
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"max_tokens": request_func_input.output_len,
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"logprobs": request_func_input.logprobs,
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"stream": streaming,
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}
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if streaming:
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payload["stream_options"] = {"include_usage": True}
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if request_func_input.ignore_eos:
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payload["ignore_eos"] = request_func_input.ignore_eos
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if request_func_input.extra_body:
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payload.update(request_func_input.extra_body)
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headers = {"Authorization": f"Bearer {os.environ.get('OPENAI_API_KEY')}"}
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output = RequestFuncOutput()
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output.prompt_len = request_func_input.prompt_len
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generated_text = ""
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st = time.perf_counter()
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most_recent_timestamp = st
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try:
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async with request_session.post(url=api_url,
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json=payload,
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headers=headers) as response:
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if response.status == 200:
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if streaming:
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first_chunk_received = False
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async for chunk_bytes in response.content:
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chunk_bytes = chunk_bytes.strip()
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if not chunk_bytes:
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continue
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chunk = chunk_bytes.decode("utf-8").removeprefix(
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"data: ")
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if chunk != "[DONE]":
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data = json.loads(chunk)
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# NOTE: Some completion API might have a last
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# usage summary response without a token so we
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# want to check a token was generated
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if choices := data.get("choices"):
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# Note that text could be empty here
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# e.g. for special tokens
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text = choices[0].get("text")
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timestamp = time.perf_counter()
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# First token
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if not first_chunk_received:
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first_chunk_received = True
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ttft = time.perf_counter() - st
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output.ttft = ttft
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# Decoding phase
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else:
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output.itl.append(timestamp -
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most_recent_timestamp)
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most_recent_timestamp = timestamp
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generated_text += text or ""
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elif usage := data.get("usage"):
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output.output_tokens = usage.get(
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"completion_tokens")
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if first_chunk_received:
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output.success = True
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else:
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output.success = False
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output.error = (
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"Never received a valid chunk to calculate TTFT."
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"This response will be marked as failed!")
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output.generated_text = generated_text
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output.latency = most_recent_timestamp - st
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else:
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content = await response.content.read()
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data = json.loads(content.decode())
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generated_text = data["choices"][0]["text"]
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output.success = True
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output.generated_text = generated_text
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output.latency = time.perf_counter() - st
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output.ttft = -1
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output.itl = []
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output.output_tokens = data["usage"]["completion_tokens"]
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else:
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output.error = response.reason or ""
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output.success = False
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except Exception:
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output.success = False
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exc_info = sys.exc_info()
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output.error = "".join(traceback.format_exception(*exc_info))
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finally:
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if session is None:
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await request_session.close()
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if pbar:
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pbar.update(1)
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return output
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async def async_request_openai_chat_completions(
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request_func_input: RequestFuncInput,
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streaming: bool = True,
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pbar: Optional[tqdm] = None,
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session: Optional[aiohttp.ClientSession] = None,
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) -> RequestFuncOutput:
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api_url = request_func_input.api_url
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assert api_url.endswith(
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("chat/completions", "profile"
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)), "OpenAI Chat Completions API URL must end with 'chat/completions'."
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request_session = aiohttp.ClientSession(
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trust_env=True,
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timeout=AIOHTTP_TIMEOUT,
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connector=aiohttp.TCPConnector(
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limit=0, limit_per_host=0)) if session is None else session
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payload = {
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"model": request_func_input.model_name \
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if request_func_input.model_name else request_func_input.model,
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"messages": [
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],
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"temperature": 0.0,
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"max_completion_tokens": request_func_input.output_len,
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"stream": streaming,
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}
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if isinstance(request_func_input.prompt, list) and all(
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[isinstance(i, int) for i in request_func_input.prompt]):
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payload["prompt_token_ids"] = request_func_input.prompt
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else:
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assert isinstance(request_func_input.prompt,
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str), "Prompt must be a string or a list of integers"
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payload["messages"].append({
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"role":
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"user",
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"content": [{
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"type": "text",
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"text": request_func_input.prompt
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}]
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})
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if streaming:
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payload["stream_options"] = {"include_usage": True}
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if request_func_input.ignore_eos:
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payload["ignore_eos"] = request_func_input.ignore_eos
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if request_func_input.extra_body:
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payload.update(request_func_input.extra_body)
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headers = {
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"Content-Type": "application/json",
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"Authorization": f"Bearer {os.environ.get('OPENAI_API_KEY')}",
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}
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output = RequestFuncOutput()
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output.prompt_len = request_func_input.prompt_len
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generated_text = ""
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ttft = 0.0
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st = time.perf_counter()
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most_recent_timestamp = st
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try:
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async with request_session.post(url=api_url,
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json=payload,
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headers=headers) as response:
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if response.status == 200:
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output.success = True
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if streaming:
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async for chunk_bytes in response.content:
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chunk_bytes = chunk_bytes.strip()
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if not chunk_bytes:
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continue
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chunk = chunk_bytes.decode("utf-8").removeprefix(
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"data: ")
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if chunk != "[DONE]":
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timestamp = time.perf_counter()
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data = json.loads(chunk)
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if choices := data.get("choices"):
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content = choices[0]["delta"].get("content")
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# First token
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if ttft == 0.0:
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ttft = timestamp - st
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output.ttft = ttft
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# Decoding phase
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else:
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output.itl.append(timestamp -
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most_recent_timestamp)
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generated_text += content or ""
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elif usage := data.get("usage"):
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output.output_tokens = usage.get(
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"completion_tokens")
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most_recent_timestamp = timestamp
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output.generated_text = generated_text
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output.latency = most_recent_timestamp - st
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else:
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content = await response.content.read()
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data = json.loads(content.decode())
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output.generated_text = data["choices"][0]["message"][
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"content"]
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output.output_tokens = data["usage"]["completion_tokens"]
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output.itl = []
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output.latency = time.perf_counter() - st
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output.ttft = -1
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else:
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output.error = response.reason or ""
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output.success = False
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except Exception:
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output.success = False
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exc_info = sys.exc_info()
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output.error = "".join(traceback.format_exception(*exc_info))
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finally:
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if session is None:
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await request_session.close()
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if pbar:
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pbar.update(1)
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return output
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def get_tokenizer(
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pretrained_model_name_or_path: str,
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tokenizer_mode: str = "auto",
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trust_remote_code: bool = False,
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**kwargs,
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) -> Union[PreTrainedTokenizer, PreTrainedTokenizerFast]:
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if tokenizer_mode == "slow":
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if kwargs.get("use_fast", False):
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raise ValueError(
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"Cannot use the fast tokenizer in slow tokenizer mode.")
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kwargs["use_fast"] = False
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return AutoTokenizer.from_pretrained(
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pretrained_model_name_or_path,
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trust_remote_code=trust_remote_code,
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**kwargs,
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)
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ASYNC_REQUEST_FUNCS = {
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"openai": async_request_openai_completions,
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"openai-chat": async_request_openai_chat_completions,
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}
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OPENAI_COMPATIBLE_BACKENDS = [
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k for k, v in ASYNC_REQUEST_FUNCS.items()
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if v in (async_request_openai_completions,
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async_request_openai_chat_completions)
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]
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