mirror of
https://github.com/NVIDIA/TensorRT-LLM.git
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5955b8afba
* Update TensorRT-LLM --------- Co-authored-by: Shixiaowei02 <39303645+Shixiaowei02@users.noreply.github.com>
289 lines
11 KiB
Python
289 lines
11 KiB
Python
import argparse
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import json
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import os
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from pathlib import Path
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# isort: off
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import torch
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import tensorrt as trt
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# isort: on
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import requests
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from PIL import Image
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from transformers import (AutoTokenizer, Blip2ForConditionalGeneration,
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Blip2Processor)
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import tensorrt_llm
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import tensorrt_llm.profiler as profiler
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from tensorrt_llm import logger
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def get_engine_name(rank):
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return 'rank{}.engine'.format(rank)
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def trt_dtype_to_torch(dtype):
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if dtype == trt.float16:
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return torch.float16
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elif dtype == trt.float32:
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return torch.float32
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elif dtype == trt.int32:
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return torch.int32
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else:
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raise TypeError("%s is not supported" % dtype)
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def TRTOPT(args, config):
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dtype = config['pretrained_config']['dtype']
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world_size = config['pretrained_config']['mapping']['world_size']
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assert world_size == tensorrt_llm.mpi_world_size(), \
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f'Engine world size ({world_size}) != Runtime world size ({tensorrt_llm.mpi_world_size()})'
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use_gpt_attention_plugin = bool(
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config['build_config']['plugin_config']['gpt_attention_plugin'])
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num_heads = config['pretrained_config']['num_attention_heads'] // world_size
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hidden_size = config['pretrained_config']['hidden_size'] // world_size
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vocab_size = config['pretrained_config']['vocab_size']
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max_batch_size = config['build_config']['max_batch_size']
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num_layers = config['pretrained_config']['num_hidden_layers']
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remove_input_padding = config['build_config']['plugin_config'][
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'remove_input_padding']
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max_prompt_embedding_table_size = config['build_config'].get(
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'max_prompt_embedding_table_size', 0)
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model_config = tensorrt_llm.runtime.ModelConfig(
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max_batch_size=max_batch_size,
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vocab_size=vocab_size,
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num_layers=num_layers,
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num_heads=num_heads,
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num_kv_heads=num_heads,
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hidden_size=hidden_size,
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gpt_attention_plugin=use_gpt_attention_plugin,
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remove_input_padding=remove_input_padding,
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max_prompt_embedding_table_size=max_prompt_embedding_table_size,
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dtype=dtype)
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runtime_rank = tensorrt_llm.mpi_rank()
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runtime_mapping = tensorrt_llm.Mapping(world_size, runtime_rank)
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torch.cuda.set_device(runtime_rank % runtime_mapping.gpus_per_node)
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engine_name = get_engine_name(runtime_rank)
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serialize_path = os.path.join(args.engine_dir, engine_name)
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tensorrt_llm.logger.set_level(args.log_level)
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with open(serialize_path, 'rb') as f:
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engine_buffer = f.read()
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decoder = tensorrt_llm.runtime.GenerationSession(model_config,
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engine_buffer,
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runtime_mapping)
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max_input_len = config['build_config']['max_input_len']
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return decoder, model_config, world_size, dtype, max_input_len
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def ptuning_setup(prompt_table, dtype, hidden_size, tasks, input_ids,
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input_lengths, remove_input_padding):
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if prompt_table is not None:
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task_vocab_size = torch.tensor([prompt_table.shape[1]],
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dtype=torch.int32,
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device="cuda")
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prompt_table = prompt_table.view(
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(prompt_table.shape[0] * prompt_table.shape[1],
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prompt_table.shape[2]))
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prompt_table = prompt_table.cuda().to(
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dtype=tensorrt_llm._utils.str_dtype_to_torch(dtype))
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else:
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prompt_table = torch.empty([1, hidden_size]).cuda()
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task_vocab_size = torch.zeros([1]).cuda()
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num_sequences = input_lengths.size(
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0) if remove_input_padding else input_ids.size(0)
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if tasks is not None:
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tasks = torch.tensor([int(t) for t in tasks.split(',')],
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dtype=torch.int32,
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device="cuda")
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assert tasks.shape[
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0] == num_sequences, "Number of supplied tasks must match input batch size"
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else:
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tasks = torch.zeros([num_sequences], dtype=torch.int32).cuda()
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return [prompt_table, tasks, task_vocab_size]
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def parse_arguments():
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parser = argparse.ArgumentParser()
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parser.add_argument('--max_output_len', type=int, default=30)
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parser.add_argument('--log_level', type=str, default='info')
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parser.add_argument('--engine_dir',
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type=str,
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default='trt_engine/blip-2-opt-2.7b/fp16/1-gpu/')
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parser.add_argument('--hf_model_location',
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type=str,
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default="facebook/opt-2.7b")
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parser.add_argument('--input_text',
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type=str,
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default='Question: which city is this? Answer:')
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parser.add_argument('--num_beams',
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type=int,
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help="Use beam search if num_beams >1",
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default=1)
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parser.add_argument('--max_txt_len',
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type=int,
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help="Max text prompt length",
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default=32)
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parser.add_argument('--top_k', type=int, default=1)
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parser.add_argument('--check_accuracy', action='store_true')
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return parser.parse_args()
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class ViT_qformer_wrapper(torch.nn.Module):
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def __init__(self, model):
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super().__init__()
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self.visual_wrapper = model.vision_model
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self.qformer = model.qformer
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self.opt_proj = model.language_projection
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self.query_tokens = model.query_tokens
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def forward(self, image):
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image_embeds = self.visual_wrapper(image)[0]
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image_atts = torch.ones(image_embeds.size()[:-1],
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dtype=torch.long).to(image.device)
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query_tokens = self.query_tokens.expand(image_embeds.shape[0], -1, -1)
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query_output = self.qformer(query_embeds=query_tokens,
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encoder_hidden_states=image_embeds,
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encoder_attention_mask=image_atts,
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return_dict=True)
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return self.opt_proj(query_output.last_hidden_state)
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if __name__ == '__main__':
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args = parse_arguments()
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tensorrt_llm.logger.set_level(args.log_level)
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stream = torch.cuda.current_stream().cuda_stream
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img_url = 'https://storage.googleapis.com/sfr-vision-language-research/LAVIS/assets/merlion.png'
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raw_image = Image.open(requests.get(img_url,
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stream=True).raw).convert('RGB')
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device = torch.device("cuda") if torch.cuda.is_available() else "cpu"
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processor = Blip2Processor.from_pretrained("Salesforce/blip2-opt-2.7b")
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blip2_model = Blip2ForConditionalGeneration.from_pretrained(
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"Salesforce/blip2-opt-2.7b", torch_dtype=torch.float16)
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blip2_model.to(device)
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prompt = args.input_text
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inputs = processor(images=raw_image, text=prompt,
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return_tensors="pt").to(device, torch.float16)
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image = inputs['pixel_values']
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vit_qformer = ViT_qformer_wrapper(blip2_model)
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batch_size = 1
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image = image.expand(batch_size, -1, -1, -1).contiguous()
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inputs_opt = vit_qformer(image)
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atts_opt = torch.ones(inputs_opt.size()[:-1],
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dtype=torch.long).to(image.device)
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prompt = [prompt] * image.size(0)
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opt_tokenizer = AutoTokenizer.from_pretrained(args.hf_model_location,
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use_fast=False)
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opt_tokenizer.padding_side = "right"
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end_id = opt_tokenizer("\n", add_special_tokens=False).input_ids[0]
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engine_dir = Path(args.engine_dir)
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config_path = engine_dir / 'config.json'
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with open(config_path, 'r') as f:
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config = json.load(f)
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tensorrt_llm_opt, model_config, world_size, dtype, max_input_len = TRTOPT(
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args, config)
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vocab_size = model_config.vocab_size
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def opt_blip2(prompt, inputs_opt, atts_opt):
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profiler.start("OPT")
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opt_tokens = opt_tokenizer(
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prompt,
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return_tensors="pt",
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padding="longest",
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truncation=True,
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max_length=args.max_txt_len,
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).to(image.device)
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attention_mask = torch.cat([atts_opt, opt_tokens.attention_mask], dim=1)
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input_lengths = torch.sum(attention_mask, dim=1).to(torch.int32).cuda()
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sampling_config = tensorrt_llm.runtime.SamplingConfig(
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end_id=end_id,
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pad_id=end_id,
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top_k=args.top_k,
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num_beams=args.num_beams)
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# Assemble fake prompts which points to image embedding actually
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fake_prompt_id = torch.arange(vocab_size,
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vocab_size +
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inputs_opt.shape[0] * inputs_opt.shape[1],
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device='cuda')
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fake_prompt_id = fake_prompt_id.reshape(inputs_opt.shape[0],
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inputs_opt.shape[1])
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input_ids = torch.cat([fake_prompt_id, opt_tokens.input_ids],
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dim=1).contiguous()
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input_ids = input_ids.to(torch.int32).cuda()
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ptuning_args = ptuning_setup(inputs_opt, dtype,
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model_config.hidden_size, None, input_ids,
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input_lengths,
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model_config.remove_input_padding)
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with torch.no_grad():
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max_input_length = torch.max(input_lengths).item()
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tensorrt_llm_opt.setup(batch_size,
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max_context_length=max_input_length,
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max_new_tokens=args.max_output_len)
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if tensorrt_llm_opt.remove_input_padding:
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output_ids = tensorrt_llm_opt.decode_batch(
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input_ids, sampling_config, *ptuning_args)
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else:
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output_ids = tensorrt_llm_opt.decode(input_ids, input_lengths,
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sampling_config,
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*ptuning_args)
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torch.cuda.synchronize()
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profiler.stop("OPT")
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# Extract a list of tensors of shape beam_width x output_ids.
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output_beams_list = [
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opt_tokenizer.batch_decode(output_ids[batch_idx, :,
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input_lengths[batch_idx]:],
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skip_special_tokens=True)
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for batch_idx in range(batch_size)
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]
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stripped_text = [[
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output_beams_list[batch_idx][beam_idx].strip()
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for beam_idx in range(args.num_beams)
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] for batch_idx in range(batch_size)]
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return stripped_text
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stripped_text = opt_blip2(prompt, inputs_opt, atts_opt)
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if args.check_accuracy:
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assert stripped_text[0][0] == "singapore"
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logger.info("---------------------------------------------------------")
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logger.info("TensorRT-LLM BLIP-2 : ")
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logger.info(f"\n[Q] {args.input_text}")
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logger.info(f"\n[A] {stripped_text}")
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logger.info("---------------------------------------------------------")
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