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Mixtral 8x7B

Mixtral 8x7B is a high-quality sparse mixture of experts (MoE) model that matches or beats GPT3.5 on most benchmarks. This repro is a simple and efficient PyTorch native implementation of Mixtral 8x7B.

Downloading Weights

export MODEL_REPO=mistralai/Mixtral-8x7B-v0.1
python scripts/download.py --repo_id $MODEL_REPO
python scripts/convert_hf_checkpoint.py --checkpoint_dir checkpoints/$MODEL_REPO

Benchmarks

Benchmarks run on an 8xA100-80GB, power limited to 330W with a hybrid cube mesh topology. Note that all benchmarks are run at batch size=1, making the reported tokens/s numbers equivalent to "tokens/s/user". In addition, they are run with a very small prompt length (just 5 tokens).

1 GPU 2 GPU 4 GPU 8 GPU
baseline(bfloat16) OOM 96.67 155.35 227.82
int8 97.92 155.03 216.87 279.35

Generate Text

Model definition in model.py, generation code in generate.py.

python generate.py --compile --checkpoint_path checkpoints/$MODEL_REPO/model.pth --prompt "Hello, my name is"

To squeeze out a little bit more performance, you can also compile the prefill with --compile_prefill. This will increase compilation times though.

Quantization

Int8 Weight-Only Quantization

To generate this version of the model

# Spits out model at checkpoints/$MODEL_REPO/model_int8.pth
python quantize.py --checkpoint_path checkpoints/$MODEL_REPO/model.pth --mode int8

To run with int8, just pass the int8 checkpoint to generate.py.

python generate.py --compile --compile_prefill --checkpoint_path checkpoints/$MODEL_REPO/model_int8.pth

Tensor Parallelism

ENABLE_INTRA_NODE_COMM=1 torchrun --standalone --nproc_per_node=8 generate.py --compile --compile_prefill --checkpoint_path checkpoints/$MODEL_REPO/model.pth