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README.md

Step-by-Step

In this example, we provide the inference benchmarking script run_llm.py for EleutherAI/gpt-j-6B, decapoda-research/llama-7b-hf, EleutherAI/gpt-neox-20b and databricks/dolly-v2-3b etc. You can also refer to link to do LLM inference with cpp graph to get better performance, but it may have constrain on batched inference.

Note: The default search algorithm is beam search with num_beams = 4

Create Environment

# Create Environment (conda)
conda create -n llm python=3.9 -y
conda install mkl mkl-include -y
conda install gperftools jemalloc==5.2.1 -c conda-forge -y
pip install -r requirements.txt

# if you want to run gpt-j model, please install transformers==4.27.4
pip install transformers==4.27.4

# for other models, please install transformers==4.34.1:
pip install transformers==4.34.1

Note: Suggest use transformers no higher than 4.34.1

Environment Variables

export KMP_BLOCKTIME=1
export KMP_SETTINGS=1
export KMP_AFFINITY=granularity=fine,compact,1,0
# IOMP
export LD_PRELOAD=${LD_PRELOAD}:${CONDA_PREFIX}/lib/libiomp5.so
# Tcmalloc is a recommended malloc implementation that emphasizes fragmentation avoidance and scalable concurrency support.
export LD_PRELOAD=${LD_PRELOAD}:${CONDA_PREFIX}/lib/libtcmalloc.so

Performance

The fp32 model is from Hugging Face EleutherAI/gpt-j-6B, decapoda-research/llama-7b-hf, decapoda-research/llama-13b-hf, databricks/dolly-v2-3b, [EleutherAI/gpt-neox-20b](https://huggingface.co/EleutherAI/gpt-neox-20b, and gpt-j int8 model has been publiced on Intel/gpt-j-6B-pytorch-int8-static.

Generate Neural Engine model

python optimize_llm.py --model=EleutherAI/gpt-j-6B --dtype=(fp32|bf16) --output_model=<path to engine model>

# int8
wget https://huggingface.co/Intel/gpt-j-6B-pytorch-int8-static/resolve/main/pytorch_model.bin -O <path to int8_model.pt>
python optimize_llm.py --model=EleutherAI/gpt-j-6B --dtype=int8 --output_model=<path to ir> --pt_file=<path to int8_model.pt>
  • When the input dtype is fp32 or bf16, the model will be downloaded if it does not exist.
  • When the input dtype is int8, the int8 trace model should exist.

Inference

We support inference with FP32/BF16/INT8 Neural Engine model.

OMP_NUM_THREADS=<physical cores num> numactl -m <node N> -C <cpu list> python run_llm.py --max-new-tokens 32 --input-tokens 32 --batch-size 1 --model <model name> --model_path <path to engine model>

Advanced Inference

Neural Engine also supports weight compression to fp8_4e3m, fp8_5e2m and int8 only when running bf16 graph. If you want to try, please add arg --weight_type, like:

OMP_NUM_THREADS=<physical cores num> numactl -m <node N> -C <cpu list> python run_llm.py --max-new-tokens 32 --input-tokens 32 --batch-size 1 --model_path <path to bf16 engine model> --model <model name> --weight_type=fp8_5e2m