mirror of
https://github.com/NVIDIA/TensorRT-LLM.git
synced 2026-01-14 06:27:45 +08:00
202bed4574
Signed-off-by: nv-guomingz <137257613+nv-guomingz@users.noreply.github.com> Signed-off-by: Wangshanshan <30051912+dominicshanshan@users.noreply.github.com>
653 lines
25 KiB
Python
653 lines
25 KiB
Python
import argparse
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import copy
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import functools
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import json
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import os
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import time
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import traceback
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from collections import defaultdict
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from concurrent.futures import ThreadPoolExecutor, as_completed
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from typing import Dict, Optional, Tuple
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import safetensors
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import torch
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import torch.nn as nn
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from tqdm import tqdm
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from transformers import AutoConfig, AutoModelForCausalLM, AutoTokenizer
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from transformers.pytorch_utils import Conv1D
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import tensorrt_llm
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from tensorrt_llm._utils import release_gc
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from tensorrt_llm.layers import MoeConfig
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from tensorrt_llm.mapping import Mapping
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from tensorrt_llm.models.convert_utils import (generate_int8,
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load_calib_dataset, split)
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from tensorrt_llm.quantization import QuantAlgo
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def parse_arguments():
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parser = argparse.ArgumentParser()
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parser.add_argument('--model_dir', type=str, default=None)
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parser.add_argument('--tp_size',
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type=int,
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default=1,
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help='N-way tensor parallelism size')
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parser.add_argument('--pp_size',
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type=int,
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default=1,
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help='N-way pipeline parallelism size')
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parser.add_argument('--dtype',
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type=str,
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default='float16',
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choices=['float32', 'bfloat16', 'float16'])
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parser.add_argument('--logits_dtype',
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type=str,
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default='float32',
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choices=['float16', 'float32'])
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parser.add_argument(
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'--per_channel',
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default=False,
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action="store_true",
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help=
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'By default, we use a single static scaling factor for the GEMM\'s result. '
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'per_channel instead uses a different static scaling factor for each channel. '
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'The latter is usually more accurate, but a little slower.')
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parser.add_argument(
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'--calib_dataset',
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type=str,
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default='ccdv/cnn_dailymail',
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help=
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"The huggingface dataset name or the local directory of the dataset for calibration."
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)
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parser.add_argument("--dataset_cache_dir",
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type=str,
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default=None,
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help="cache dir to load the hugging face dataset")
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parser.add_argument(
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'--int8_kv_cache',
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default=False,
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action="store_true",
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help=
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'By default, we use dtype for KV cache. int8_kv_cache chooses int8 quantization for KV'
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)
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parser.add_argument(
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'--use_weight_only',
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default=False,
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action="store_true",
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help='Quantize weights for the various GEMMs to INT4/INT8.'
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'See --weight_only_precision to set the precision')
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parser.add_argument(
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'--weight_only_precision',
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const='int8',
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type=str,
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nargs='?',
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default='int8',
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choices=['int8', 'int4'],
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help=
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'Define the precision for the weights when using weight-only quantization.'
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'You must also use --use_weight_only for that argument to have an impact.'
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)
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parser.add_argument('--output_dir',
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type=str,
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default='tllm_checkpoint',
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help='The path to save the TensorRT LLM checkpoint')
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parser.add_argument(
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'--workers',
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type=int,
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default=1,
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help='The number of workers for converting checkpoint in parallel')
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parser.add_argument('--rotary_base', type=float, default=10000.0)
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parser.add_argument('--rotary_scaling', nargs=2, type=str, default=None)
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parser.add_argument('--vocab_size', type=int, default=32000)
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parser.add_argument('--n_positions', type=int, default=2048)
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parser.add_argument('--n_layer', type=int, default=32)
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parser.add_argument('--n_head', type=int, default=32)
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parser.add_argument('--n_kv_head', type=int, default=None)
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parser.add_argument('--n_embd', type=int, default=4096)
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parser.add_argument('--inter_size', type=int, default=11008)
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parser.add_argument('--max_seq_len', type=int, default=4096)
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parser.add_argument('--clip_qkv', type=int, default=None)
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parser.add_argument('--hidden_act',
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type=str,
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default='gelu',
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help='Set to swiglu to use GLU in MoEs')
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parser.add_argument(
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'--moe_num_experts',
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default=0,
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type=int,
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help='Specify the number of experts to use for MOE layers')
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parser.add_argument(
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'--moe_top_k',
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default=0,
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type=int,
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help=
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'Specify the top_k value to use for MOE layers. Default to 1 if --moe_num_experts is set'
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)
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parser.add_argument(
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'--moe_tp_size',
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type=int,
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default=-1,
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help=
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'N-way tensor parallelism size for MOE, default is tp_size, which will do tp-only for MoE'
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)
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parser.add_argument(
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'--moe_ep_size',
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type=int,
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default=-1,
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help=
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'N-way expert parallelism size for MOE, default is 1, which will do tp-only for MoE'
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)
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parser.add_argument(
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'--moe_renorm_mode',
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default=MoeConfig.ExpertScaleNormalizationMode.RENORMALIZE,
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type=int,
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help=
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'Controls renormalization after gate logits. Check layers/moe.py for accepted values',
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)
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parser.add_argument(
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'--disable_weight_only_quant_plugin',
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default=False,
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action="store_true",
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help=
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'By default, using plugin implementation for weight quantization. Enabling disable_weight_only_quant_plugin flag will use ootb implementation instead of plugin.'
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'You must also use --use_weight_only for that argument to have an impact.'
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)
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parser.add_argument(
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'--dense_context_fmha',
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default=False,
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action='store_true',
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help=
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'Enable dense fmha in context phase, otherwise sliding window attention.'
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'If dense_context_fmha=False, the sliding window size is the max attention window size.'
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)
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parser.add_argument(
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'--use_parallel_embedding',
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action="store_true",
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default=False,
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help=
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'By default embedding parallelism is disabled. By setting this flag, embedding parallelism is enabled'
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)
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parser.add_argument(
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'--embedding_sharding_dim',
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type=int,
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default=0,
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choices=[0, 1],
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help=
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'By default the embedding lookup table is sharded along vocab dimension (embedding_sharding_dim=0). '
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'To shard it along hidden dimension, set embedding_sharding_dim=1'
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'Note: embedding sharing is only enabled when embedding_sharding_dim = 0'
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)
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parser.add_argument('--use_prompt_tuning',
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action="store_true",
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default=False)
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args = parser.parse_args()
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return args
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def args_to_build_options(args):
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return {
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'use_parallel_embedding': args.use_parallel_embedding,
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'embedding_sharding_dim': args.embedding_sharding_dim,
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'disable_weight_only_quant_plugin':
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args.disable_weight_only_quant_plugin
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}
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def get_weight(params: Dict[str, torch.Tensor], prefix: str,
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dtype: torch.dtype) -> torch.Tensor:
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if f'{prefix}' in params:
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return params[f'{prefix}'].to(dtype).detach().cpu()
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elif f'{prefix}.weight' not in params:
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return None
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return params[f'{prefix}.weight'].to(dtype).detach().cpu()
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def get_bias(params: Dict[str, torch.Tensor], prefix: str,
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dtype: torch.dtype) -> torch.Tensor:
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if f'{prefix}.bias' not in params:
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return None
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return params[f'{prefix}.bias'].to(dtype).detach().cpu()
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def get_weight_and_bias(params: Dict[str, torch.Tensor], prefix: str,
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dtype: torch.dtype) -> Tuple[torch.Tensor]:
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return get_weight(params, prefix, dtype), get_bias(params, prefix, dtype)
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@torch.no_grad()
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def capture_activation_range(model,
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tokenizer,
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dataset,
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num_samples=1,
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seq_len=512):
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model.eval()
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device = next(model.parameters()).device
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act_scales = defaultdict(lambda: {"x": None, "y": None, "w": None})
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tokenizer.pad_token = tokenizer.eos_token
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def stat_tensor(name, tensor, act_scales, key):
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hidden_dim = tensor.shape[-1]
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tensor = tensor.view(-1, hidden_dim).abs().detach()
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comming_max = torch.max(tensor, dim=0)[0].float()
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if act_scales[name][key] is None:
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act_scales[name][key] = comming_max
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else:
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act_scales[name][key] = torch.max(act_scales[name][key],
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comming_max)
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def stat_input_hook(m, x, y, name):
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if isinstance(x, tuple):
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x = x[0]
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stat_tensor(name, x, act_scales, "x")
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stat_tensor(name, y, act_scales, "y")
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if act_scales[name]["w"] is None:
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act_scales[name]["w"] = m.weight.abs().clip(
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1e-8, None).max(dim=1)[0].float()
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hooks = []
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for name, m in model.named_modules():
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if isinstance(m, nn.Linear) or isinstance(m, Conv1D):
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hooks.append(
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m.register_forward_hook(
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functools.partial(stat_input_hook, name=name)))
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for i in tqdm(range(num_samples), desc="calibrating model"):
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datapoint = dataset[i:i + 1]
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line = copy.copy(datapoint)
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line[0] = line[0] + ' TL;DR: '
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line[0] = line[0].strip()
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line[0] = line[0].replace(" n't", "n't")
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input_ids = tokenizer(line,
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return_tensors="pt",
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max_length=seq_len,
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padding=True,
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truncation=True).input_ids.to(device)
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model(input_ids)
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for h in hooks:
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h.remove()
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return act_scales
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def split_qkv_tp(qkv, n_head, n_kv_heads, n_hidden, tensor_parallel, rank):
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"""
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Splits the QKV matrix according to tensor parallelism
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"""
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kv_head_size = n_kv_heads * (n_hidden // n_head)
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q, k, v = torch.split(qkv, [n_hidden, kv_head_size, kv_head_size], dim=0)
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q = split(q, tensor_parallel, rank, dim=0)
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k = split(k, tensor_parallel, rank, dim=0)
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v = split(v, tensor_parallel, rank, dim=0)
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return torch.concatenate([q, k, v], dim=0).contiguous()
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def split_matrix(weight: torch.Tensor, tp_size: int, rank: int,
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dim: int) -> torch.Tensor:
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return split(weight, tp_size, rank, dim=dim)
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def get_tllm_linear_weight(
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weight: torch.Tensor,
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prefix: str,
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bias: Optional[torch.Tensor] = None,
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use_weight_only: bool = False,
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plugin_weight_only_quant_type: torch.dtype = torch.int8,
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postfix='weight',
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quant_scale_name=None) -> Dict[str, torch.Tensor]:
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results = {}
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if use_weight_only:
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if weight.dim() > 2:
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v = weight.transpose(1, 2).contiguous().clone()
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else:
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v = weight.t().contiguous().clone()
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processed_torch_weights, torch_weight_scales = \
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torch.ops.trtllm.symmetric_quantize_last_axis_of_batched_matrix(
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v.cpu(), plugin_weight_only_quant_type)
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results[prefix + postfix] = processed_torch_weights
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if quant_scale_name is not None:
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results[quant_scale_name] = torch_weight_scales
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else:
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results[prefix + 'per_channel_scale'] = torch_weight_scales
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else:
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results[prefix + postfix] = weight.contiguous()
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if bias is not None:
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results[f'{prefix}bias'] = bias
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return results
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def convert_hf_dbrx(model_params: dict,
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hf_config: AutoConfig,
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mapping: Mapping,
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dtype: str = 'float32',
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use_weight_only: bool = False,
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plugin_weight_only_quant_type: torch.dtype = torch.int8,
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moe_config: MoeConfig = None,
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int8_kv_cache=False,
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act_range=[]):
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weights = {}
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tik = time.time()
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dtype = getattr(torch, dtype)
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num_hidden_layers = hf_config.n_layers
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num_head = hf_config.n_heads
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num_kv_heads = hf_config.attn_config.kv_n_heads
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num_hidden = hf_config.d_model
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mlp_hidden_size = hf_config.ffn_config.ffn_hidden_size
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layers_range = mapping.pp_layers(num_hidden_layers)
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multi_query_mode = (num_kv_heads != num_head)
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for l in layers_range:
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prefix = f'transformer.blocks.{l}'
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tllm_prex = f'transformer.layers.{l-layers_range[0]}'
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# Attention QKV (no bias)
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qkv_w = get_weight(model_params, f'{prefix}.norm_attn_norm.attn.Wqkv',
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dtype)
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qkv_w = split_qkv_tp(qkv_w, num_head, num_kv_heads, num_hidden,
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mapping.tp_size, mapping.tp_rank)
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weights.update(
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get_tllm_linear_weight(qkv_w, f'{tllm_prex}.attention.qkv.', None,
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use_weight_only,
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plugin_weight_only_quant_type))
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# Attention dense (no bias)
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attn_dense_weight = get_weight(
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model_params, f'{prefix}.norm_attn_norm.attn.out_proj', dtype)
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attn_dense_w = split_matrix(attn_dense_weight,
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mapping.tp_size,
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mapping.tp_rank,
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dim=1)
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weights.update(
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get_tllm_linear_weight(attn_dense_w,
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f'{tllm_prex}.attention.dense.', None,
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use_weight_only,
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plugin_weight_only_quant_type))
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if int8_kv_cache:
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qkv_weight = get_weight(model_params,
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f'{prefix}.norm_attn_norm.attn.Wqkv', dtype)
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qkv_weight = qkv_weight.t()
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if not multi_query_mode:
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qkv_weight = qkv_weight.reshape(num_hidden, 3, num_hidden)
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int8_weights = generate_int8(
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qkv_weight,
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act_range.get(f'{prefix}.norm_attn_norm.attn.Wqkv'),
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is_qkv=True,
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multi_query_mode=multi_query_mode)
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weights[
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f'{tllm_prex}.attention.kv_cache_scaling_factor'] = int8_weights[
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'scale_y_quant_orig'].contiguous()
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# input layer_norm
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input_ln_weight = get_weight(model_params,
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f'{prefix}.norm_attn_norm.norm_1', dtype)
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weights[f'{tllm_prex}.input_layernorm.weight'] = input_ln_weight
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# post layer_norm
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post_ln_weight = get_weight(model_params,
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f'{prefix}.norm_attn_norm.norm_2', dtype)
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weights[f'{tllm_prex}.post_layernorm.weight'] = post_ln_weight
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if moe_config and moe_config.has_moe():
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# experts mlp w1 -> mlp gate
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mlp_gate_weight = get_weight(model_params,
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f'{prefix}.ffn.experts.mlp.w1', dtype)
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mlp_gate_weight = mlp_gate_weight.reshape(-1, mlp_hidden_size,
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num_hidden)
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# moe expert parallel
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mlp_gate_weight = split_matrix(mlp_gate_weight,
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mapping.moe_ep_size,
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mapping.moe_ep_rank,
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dim=0)
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# moe tensor parallel
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mlp_gate_w = split_matrix(mlp_gate_weight,
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mapping.moe_tp_size,
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mapping.moe_tp_rank,
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dim=1)
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# experts mlp v1 -> mlp fc
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mlp_fc_weight = get_weight(model_params,
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f'{prefix}.ffn.experts.mlp.v1', dtype)
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mlp_fc_weight = mlp_fc_weight.reshape(-1, mlp_hidden_size,
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num_hidden)
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# moe expert parallel
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mlp_fc_weight = split_matrix(mlp_fc_weight,
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mapping.moe_ep_size,
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mapping.moe_ep_rank,
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dim=0)
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# moe tensor parallel
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mlp_fc_w = split_matrix(mlp_fc_weight,
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mapping.moe_tp_size,
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mapping.moe_tp_rank,
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dim=1)
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mlp_fc_w = torch.concat([mlp_fc_w, mlp_gate_w], dim=-2)
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weights.update(
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get_tllm_linear_weight(mlp_fc_w, f'{tllm_prex}.mlp.fc.', None,
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use_weight_only,
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plugin_weight_only_quant_type))
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# experts mlp w2 -> mlp proj
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mlp_proj_weight = get_weight(model_params,
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f'{prefix}.ffn.experts.mlp.w2', dtype)
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mlp_proj_weight = mlp_proj_weight.reshape(-1, mlp_hidden_size,
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num_hidden).transpose(
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1, 2)
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# moe expert parallel
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mlp_proj_weight = split_matrix(mlp_proj_weight,
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mapping.moe_ep_size,
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mapping.moe_ep_rank,
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dim=0)
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# moe tensor parallel
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mlp_proj_w = split_matrix(mlp_proj_weight,
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mapping.moe_tp_size,
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mapping.moe_tp_rank,
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dim=2)
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weights.update(
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get_tllm_linear_weight(mlp_proj_w, f'{tllm_prex}.mlp.proj.',
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None, use_weight_only,
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plugin_weight_only_quant_type))
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# router mlp
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router_weights = get_weight(model_params,
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f'{prefix}.ffn.router.layer',
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torch.float32)
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weights[f'{tllm_prex}.mlp.router.weight'] = router_weights
|
|
|
|
embed_w = get_weight(model_params, 'transformer.wte', dtype)
|
|
lm_head = get_weight(model_params, 'lm_head', dtype)
|
|
if mapping.is_first_pp_rank():
|
|
# Embedding
|
|
weights['transformer.vocab_embedding.weight'] = embed_w
|
|
if mapping.is_last_pp_rank():
|
|
if lm_head is None:
|
|
lm_head = embed_w.clone()
|
|
ln_f_w = get_weight(model_params, 'transformer.norm_f', dtype)
|
|
# ln_f weight and bias
|
|
weights['transformer.ln_f.weight'] = ln_f_w
|
|
weights['lm_head.weight'] = split_matrix(lm_head,
|
|
mapping.tp_size,
|
|
mapping.tp_rank,
|
|
dim=0)
|
|
|
|
tok = time.time()
|
|
t = time.strftime('%H:%M:%S', time.gmtime(tok - tik))
|
|
print(f'Weights loaded. Total time: {t}')
|
|
return weights
|
|
|
|
|
|
def execute(workers, func, hf_model):
|
|
if workers == 1:
|
|
for rank, f in enumerate(func):
|
|
f(hf_model, rank)
|
|
else:
|
|
with ThreadPoolExecutor(max_workers=workers) as p:
|
|
futures = [
|
|
p.submit(f, hf_model, rank) for rank, f in enumerate(func)
|
|
]
|
|
exceptions = []
|
|
for future in as_completed(futures):
|
|
try:
|
|
future.result()
|
|
except Exception as e:
|
|
traceback.print_exc()
|
|
exceptions.append(e)
|
|
assert len(
|
|
exceptions
|
|
) == 0, "Checkpoint conversion failed, please check error log."
|
|
|
|
|
|
if __name__ == '__main__':
|
|
print(tensorrt_llm.__version__)
|
|
args = parse_arguments()
|
|
world_size = args.tp_size * args.pp_size
|
|
if (args.moe_tp_size == -1 and args.moe_ep_size == -1):
|
|
# moe default to tp-only
|
|
args.moe_tp_size = args.tp_size
|
|
args.moe_ep_size = 1
|
|
elif (args.moe_tp_size == -1):
|
|
args.moe_tp_size = args.tp_size // args.moe_ep_size
|
|
elif (args.moe_ep_size == -1):
|
|
args.moe_ep_size = args.tp_size // args.moe_tp_size
|
|
assert (args.moe_tp_size * args.moe_ep_size == args.tp_size
|
|
), "moe_tp_size * moe_ep_size must equal to tp_size"
|
|
|
|
tik = time.time()
|
|
|
|
if not os.path.exists(args.output_dir):
|
|
os.makedirs(args.output_dir)
|
|
|
|
quant_algo = None
|
|
kv_cache_quant_algo = None
|
|
plugin_weight_only_quant_type = None
|
|
if args.use_weight_only:
|
|
if args.weight_only_precision == 'int8':
|
|
plugin_weight_only_quant_type = torch.int8
|
|
quant_algo = QuantAlgo.W8A16
|
|
elif args.weight_only_precision == 'int4':
|
|
plugin_weight_only_quant_type = torch.quint4x2
|
|
quant_algo = QuantAlgo.W4A16
|
|
|
|
if args.int8_kv_cache:
|
|
kv_cache_quant_algo = QuantAlgo.INT8
|
|
|
|
hf_config = None
|
|
|
|
if args.model_dir is not None:
|
|
hf_config = AutoConfig.from_pretrained(args.model_dir,
|
|
trust_remote_code=True)
|
|
args.n_kv_head = hf_config.attn_config.kv_n_heads
|
|
args.n_layer = hf_config.n_layers
|
|
args.n_head = hf_config.n_heads
|
|
args.vocab_size = hf_config.vocab_size
|
|
args.n_embd = hf_config.d_model
|
|
args.inter_size = hf_config.ffn_config.ffn_hidden_size
|
|
args.max_seq_len = hf_config.max_seq_len
|
|
args.moe_num_experts = getattr(hf_config.ffn_config, "moe_num_experts",
|
|
0)
|
|
args.moe_top_k = getattr(hf_config.ffn_config, "moe_top_k", 0)
|
|
if args.moe_num_experts and args.moe_top_k == 0:
|
|
args.moe_top_k = 1
|
|
args.clip_qkv = hf_config.attn_config.clip_qkv
|
|
args.hidden_act = 'swiglu'
|
|
args.rotary_base = hf_config.attn_config.rope_theta
|
|
args.moe_config = MoeConfig(
|
|
num_experts=args.moe_num_experts,
|
|
top_k=args.moe_top_k,
|
|
normalization_mode=args.moe_renorm_mode).validate()
|
|
config = {
|
|
'architecture': hf_config.architectures[0],
|
|
'dtype': args.dtype,
|
|
'logits_dtype': args.logits_dtype,
|
|
'vocab_size': args.vocab_size,
|
|
'hidden_size': args.n_embd,
|
|
'intermediate_size': args.inter_size,
|
|
'num_hidden_layers': args.n_layer,
|
|
'num_attention_heads': args.n_head,
|
|
'num_key_value_heads': args.n_kv_head,
|
|
'max_position_embeddings': args.max_seq_len,
|
|
'norm_epsilon': 1e-5,
|
|
'position_embedding_type': 'rope_gpt_neox',
|
|
'hidden_act': args.hidden_act,
|
|
'rotary_base': args.rotary_base,
|
|
'rotary_scaling': args.rotary_scaling,
|
|
'quantization': {
|
|
'quant_algo': quant_algo,
|
|
'kv_cache_quant_algo': kv_cache_quant_algo,
|
|
},
|
|
'moe': {
|
|
"num_experts": args.moe_num_experts,
|
|
"top_k": args.moe_top_k,
|
|
"normalization_mode": args.moe_renorm_mode
|
|
},
|
|
'mapping': {
|
|
'world_size': world_size,
|
|
'tp_size': args.tp_size,
|
|
'pp_size': args.pp_size,
|
|
'moe_tp_size': args.moe_tp_size,
|
|
'moe_ep_size': args.moe_ep_size,
|
|
},
|
|
'clip_qkv': args.clip_qkv,
|
|
'dense_context_fmha': args.dense_context_fmha,
|
|
}
|
|
|
|
config.update(args_to_build_options(args))
|
|
|
|
with open(os.path.join(args.output_dir, 'config.json'), 'w') as f:
|
|
json.dump(config, f, indent=4)
|
|
|
|
def load_from_hf(model_dir):
|
|
hf_model = AutoModelForCausalLM.from_pretrained(model_dir,
|
|
trust_remote_code=True,
|
|
device_map="auto",
|
|
torch_dtype=getattr(
|
|
torch, args.dtype),
|
|
config=hf_config)
|
|
return hf_model
|
|
|
|
def convert_and_save(hf_model, rank):
|
|
mapping = Mapping(world_size=world_size,
|
|
rank=rank,
|
|
tp_size=args.tp_size,
|
|
pp_size=args.pp_size,
|
|
moe_tp_size=args.moe_tp_size,
|
|
moe_ep_size=args.moe_ep_size)
|
|
act_range = {}
|
|
if args.int8_kv_cache:
|
|
tokenizer = AutoTokenizer.from_pretrained(args.model_dir,
|
|
padding_side='left',
|
|
trust_remote_code=True)
|
|
dataset = load_calib_dataset(args.calib_dataset,
|
|
cache_dir=args.dataset_cache_dir)
|
|
act_range = capture_activation_range(hf_model, tokenizer, dataset)
|
|
|
|
hf_model = dict(hf_model.named_parameters())
|
|
weights = convert_hf_dbrx(
|
|
hf_model,
|
|
hf_config,
|
|
mapping,
|
|
dtype=args.dtype,
|
|
use_weight_only=args.use_weight_only,
|
|
plugin_weight_only_quant_type=plugin_weight_only_quant_type,
|
|
moe_config=args.moe_config,
|
|
int8_kv_cache=args.int8_kv_cache,
|
|
act_range=act_range)
|
|
|
|
safetensors.torch.save_file(
|
|
weights, os.path.join(args.output_dir, f'rank{rank}.safetensors'))
|
|
del weights
|
|
release_gc()
|
|
|
|
if args.model_dir:
|
|
hf_model = load_from_hf(args.model_dir)
|
|
execute(args.workers, [convert_and_save] * world_size, hf_model)
|
|
|
|
tok = time.time()
|
|
t = time.strftime('%H:%M:%S', time.gmtime(tok - tik))
|
|
print(f'Total time of converting checkpoints: {t}')
|