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HomeTechnology peripheralsAIShanghai Jiao Tong University releases inference engine PowerInfer. Its token generation rate is only 18% lower than A100. It may replace 4090 as a substitute for A100.

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The emergence of PowerInfer makes running AI on consumer-grade hardware more efficient


The Shanghai Jiao Tong University team has just launched PowerInfer, a super powerful CPU/GPU LLM high-speed inference engine.

Shanghai Jiao Tong University releases inference engine PowerInfer. Its token generation rate is only 18% lower than A100. It may replace 4090 as a substitute for A100.


## Project address: https://github.com/SJTU-IPADS/PowerInfer

Shanghai Jiao Tong University releases inference engine PowerInfer. Its token generation rate is only 18% lower than A100. It may replace 4090 as a substitute for A100.


Paper address: https://ipads.se.sjtu.edu.cn/_media /publications/powerinfer-20231219.pdf

How fast?

On a single RTX 4090 (24G) running Falcon (ReLU)-40B-FP16, PowerInfer achieved an 11x speedup compared to llama.cpp!

Shanghai Jiao Tong University releases inference engine PowerInfer. Its token generation rate is only 18% lower than A100. It may replace 4090 as a substitute for A100.


Both PowerInfer and llama.cpp run on the same hardware and take full advantage of VRAM on RTX 4090.

Across various LLMs on a single NVIDIA RTX 4090 GPU, PowerInfer has an average token generation rate of 13.20 tokens/sec, with a peak of 29.08 tokens/sec. seconds, only 18% lower than the top server-grade A100 GPU.

Shanghai Jiao Tong University releases inference engine PowerInfer. Its token generation rate is only 18% lower than A100. It may replace 4090 as a substitute for A100.


##



Specifically, PowerInfer is a high-speed inference engine for on-premises LLM deployment. It exploits the high locality in LLM inference to design a GPU-CPU hybrid inference engine. Hot-activated neurons are preloaded on the GPU for quick access, while cold-activated neurons are (mostly) computed on the CPU. This approach significantly reduces GPU memory requirements and CPU-GPU data transfers.


PowerInfer can run large language models (LLM) at high speed on a personal computer (PC) equipped with a single consumer GPU. Users can now use PowerInfer with Llama 2 and Faclon 40B, with support for Mistral-7B coming soon.

#The key to PowerInfer’s design is to exploit the high degree of locality inherent in LLM inference, which is characterized by the power-law distribution in neuronal activations.

Shanghai Jiao Tong University releases inference engine PowerInfer. Its token generation rate is only 18% lower than A100. It may replace 4090 as a substitute for A100.


Figure 7 below shows an architectural overview of PowerInfer, including offline and online components.

Shanghai Jiao Tong University releases inference engine PowerInfer. Its token generation rate is only 18% lower than A100. It may replace 4090 as a substitute for A100.


This distribution indicates that a small subset of neurons (called hot neurons) Activation is consistent across inputs, whereas most cold neurons vary depending on specific inputs. PowerInfer leverages this mechanism to design a GPU-CPU hybrid inference engine.

Shanghai Jiao Tong University releases inference engine PowerInfer. Its token generation rate is only 18% lower than A100. It may replace 4090 as a substitute for A100.


PowerInfer further integrates adaptive predictors and neuron-aware sparse operators to optimize It improves the efficiency of neuron activation and computational sparsity.

After seeing this study, netizens expressed excitement: It is no longer a dream to run a 175B large model with a single card 4090.

Shanghai Jiao Tong University releases inference engine PowerInfer. Its token generation rate is only 18% lower than A100. It may replace 4090 as a substitute for A100.


For more information, please view the original paper.

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