Neural Speed

Neural Speed is an innovative library designed to support the efficient inference of large language models (LLMs) on Intel platforms through the state-of-the-art (SOTA) low-bit quantization powered by Intel Neural Compressor. The work is inspired by llama.cpp and further optimized for Intel platforms with our innovations in NeurIPS' 2023

Key Features

• Highly optimized kernels on CPUs with ISAs (AMX, VNNI, AVX512F, AVX_VNNI and AVX2) for N-bit weight (int1, int2, int3, int4, int5, int6, int7 and int8). See details
• Up to 40x performance speedup on popular LLMs compared with llama.cpp. See details
• Tensor parallelism across sockets/nodes on CPUs. See details

Neural Speed is under active development so APIs are subject to change.

Supported Hardware

Supported Models

Support almost all the LLMs in PyTorch format from Hugging Face such as Llama2, ChatGLM2, Baichuan2, Qwen, Mistral, Whisper, etc. File an issue if your favorite LLM does not work.

Support typical LLMs in GGUF format such as Llama2, Falcon, MPT, Bloom etc. More are coming. Check out the details.

Installation

Install from binary

pip install -r requirements.txt
pip install neural-speed

Build from Source

pip install .

Note: GCC requires version 10+

Quick Start (Transformer-like usage)

Install Intel Extension for Transformers to use Transformer-like APIs.

PyTorch Model from Hugging Face

from transformers import AutoTokenizer, TextStreamer
from intel_extension_for_transformers.transformers import AutoModelForCausalLM
model_name = "Intel/neural-chat-7b-v3-1"     # Hugging Face model_id or local model
prompt = "Once upon a time, there existed a little girl,"

tokenizer = AutoTokenizer.from_pretrained(model_name, trust_remote_code=True)
inputs = tokenizer(prompt, return_tensors="pt").input_ids
streamer = TextStreamer(tokenizer)

model = AutoModelForCausalLM.from_pretrained(model_name, load_in_4bit=True)
outputs = model.generate(inputs, streamer=streamer, max_new_tokens=300)

GGUF Model from Hugging Face

from transformers import AutoTokenizer, TextStreamer
from intel_extension_for_transformers.transformers import AutoModelForCausalLM

# Specify the GGUF repo on the Hugginface
model_name = "TheBloke/Llama-2-7B-Chat-GGUF"
# Download the the specific gguf model file from the above repo
gguf_file = "llama-2-7b-chat.Q4_0.gguf"
# make sure you are granted to access this model on the Huggingface.
tokenizer_name = "meta-llama/Llama-2-7b-chat-hf"

prompt = "Once upon a time"
tokenizer = AutoTokenizer.from_pretrained(tokenizer_name, trust_remote_code=True)
inputs = tokenizer(prompt, return_tensors="pt").input_ids
streamer = TextStreamer(tokenizer)
model = AutoModelForCausalLM.from_pretrained(model_name, gguf_file = gguf_file)
outputs = model.generate(inputs, streamer=streamer, max_new_tokens=300)

PyTorch Model from Modelscope

from transformers import TextStreamer
from modelscope import AutoTokenizer
from intel_extension_for_transformers.transformers import AutoModelForCausalLM
model_name = "qwen/Qwen-7B"     # Modelscope model_id or local model
prompt = "Once upon a time, there existed a little girl,"

model = AutoModelForCausalLM.from_pretrained(model_name, load_in_4bit=True, model_hub="modelscope")
tokenizer = AutoTokenizer.from_pretrained(model_name, trust_remote_code=True)
inputs = tokenizer(prompt, return_tensors="pt").input_ids
streamer = TextStreamer(tokenizer)
outputs = model.generate(inputs, streamer=streamer, max_new_tokens=300)

As an Inference Backend in Neural Chat Server

Neural Speed can be used in Neural Chat Server of Intel Extension for Transformers. You can choose to enable it by adding use_neural_speed: true in config.yaml.

• add optimization key section to use Neural Speed and its RTN quantization (example).

  
  device: "cpu"

itrex int4 llm runtime optimization

optimization: use_neural_speed: true optimization_type: "weight_only" compute_dtype: "fp32" weight_dtype: "int4"

- add key `use_neural_speed` and key `use_gptq` to use `Neural Speed` and load `GPT-Q` model ([example](https://github.com/intel/intel-extension-for-transformers/blob/main/intel_extension_for_transformers/neural_chat/examples/deployment/codegen/backend/pc/gptq/codegen.yaml)).

```yaml
device: "cpu"
use_neural_speed: true
use_gptq: true

More details please refer to Neural Chat.

Quick Start (llama.cpp-like usage)

Single (One-click) Step

python scripts/run.py model-path --weight_dtype int4 -p "She opened the door and see"

Multiple Steps

Convert and Quantize

# skip the step if GGUF model is from Hugging Face or generated by llama.cpp
python scripts/convert.py --outtype f32 --outfile ne-f32.bin EleutherAI/gpt-j-6b
# Using the quantize script requires a binary installation of Neural Speed
mkdir build&&cd build
cmake ..&&make -j
cd ..
python scripts/quantize.py  --model_name gptj --model_file ne-f32.bin  --out_file ne-q4_j.bin  --build_dir ./build --weight_dtype int4 --alg sym

Inference

# Linux and WSL
OMP_NUM_THREADS=<physic_cores> numactl -m 0 -C 0-<physic_cores-1> python scripts/inference.py --model_name llama -m ne-q4_j.bin -c 512 -b 1024 -n 256 -t <physic_cores> --color -p "She opened the door and see"

# Windows
python scripts/inference.py --model_name llama -m ne-q4_j.bin -c 512 -b 1024 -n 256 -t <physic_cores|P-cores> --color -p "She opened the door and see"

Please refer to Advanced Usage for more details.

Advanced Topics

New model enabling

You can consider adding your own models, please follow the document: graph developer document.

Performance profiling

Enable NEURAL_SPEED_VERBOSE environment variable for performance profiling.

Available modes:

• 0: Print full information: evaluation time and operator profiling. Need to set NS_PROFILING to ON and recompile.
• 1: Print evaluation time. Time taken for each evaluation.
• 2: Profile individual operator. Identify performance bottleneck within the model. Need to set NS_PROFILING to ON and recompile.