Post
1098
๐ฅ ๐-๐๐ฎ๐ฅ: ๐๐๐๐ข๐ญ๐ข๐จ๐ง-๐๐ง๐ฅ๐ฒ ๐๐ฎ๐ฅ๐ญ๐ข๐ฉ๐ฅ๐ข๐๐๐ญ๐ข๐จ๐ง ๐๐๐ง ๐ฌ๐ฅ๐๐ฌ๐ก ๐๐จ๐ฆ๐ฉ๐ฎ๐ญ๐๐ญ๐ข๐จ๐ง๐๐ฅ ๐๐จ๐ฌ๐ญ๐ฌ ๐๐ฒ ๐๐%!
Microsoft researchers dropped a groundbreaking technique that could slash the energy use in transformer computations : their novel "linear-complexity multiplication" (L-Mul) algorithm approximates floating-point multiplication using energy-efficient integer addition instead of costly multiplications.
๐ก Quick reminder on how floats are coded on 8 bits (FP8):
In the e4m3 FP8 standard, you encode a number as:
Sign (1 bit) | Exponent (4 bits) | Mantissa (3 bits)
Example: 0 (positive) | 1000 (8) | 101 (1/2 + 1/8 = 0.625)
Calculation: you add one to the mantissa, and multiply it by 2 power (the exponent - a bias term which is 7 for e4m3):
โก๏ธย You get (1 + 0.625) ร 2^(8-7) = 3.25
Now back to the paper. ๐๐ฒ๐ ๐ถ๐ป๐๐ถ๐ด๐ต๐๐:
โก๏ธ Multiplication is extremely energy-intensive compared to addition. For 32-bit operations, multiplication (3.7 pJ) uses 37x more energy than addition (0.1 pJ)!
๐งฎ Traditional floating-point multiplication go like (noting xm the mantissa and xe the exponent): Mul(x,y) = (1 + xm) ยท 2^xe ยท (1 + ym) ยท 2^ye = (1 + xm + ym + xm ยท ym) ยท 2^(xe+ye)
๐ก L-Mul cleverly approximates this as: L-Mul(x,y) = (1 + xm + ym + 2^-l(m)) ยท 2^(xe+ye), eliminating the costly xm ยท ym term
๐ง l(m) term is adaptively set based on mantissa size for optimal accuracy
๐ Benchmarks on the Llama-3.1-8B-Instruct model show L-Mul preserves precision across various NLP tasks, with performance nearly identical to full BFloat16 precision
๐ฌ Authors claim: "We can achieve the same model inference performance while reducing the energy cost of attention computations by 80%."
This breakthrough is still theoretical and would need implementation on dedicated hardware to confirm real-world gains, but itโs a really exciting path for more sustainable AI! ๐ฑ
Read the paper here ๐ย Addition is All You Need for Energy-efficient Language Models (2410.00907)
Microsoft researchers dropped a groundbreaking technique that could slash the energy use in transformer computations : their novel "linear-complexity multiplication" (L-Mul) algorithm approximates floating-point multiplication using energy-efficient integer addition instead of costly multiplications.
๐ก Quick reminder on how floats are coded on 8 bits (FP8):
In the e4m3 FP8 standard, you encode a number as:
Sign (1 bit) | Exponent (4 bits) | Mantissa (3 bits)
Example: 0 (positive) | 1000 (8) | 101 (1/2 + 1/8 = 0.625)
Calculation: you add one to the mantissa, and multiply it by 2 power (the exponent - a bias term which is 7 for e4m3):
โก๏ธย You get (1 + 0.625) ร 2^(8-7) = 3.25
Now back to the paper. ๐๐ฒ๐ ๐ถ๐ป๐๐ถ๐ด๐ต๐๐:
โก๏ธ Multiplication is extremely energy-intensive compared to addition. For 32-bit operations, multiplication (3.7 pJ) uses 37x more energy than addition (0.1 pJ)!
๐งฎ Traditional floating-point multiplication go like (noting xm the mantissa and xe the exponent): Mul(x,y) = (1 + xm) ยท 2^xe ยท (1 + ym) ยท 2^ye = (1 + xm + ym + xm ยท ym) ยท 2^(xe+ye)
๐ก L-Mul cleverly approximates this as: L-Mul(x,y) = (1 + xm + ym + 2^-l(m)) ยท 2^(xe+ye), eliminating the costly xm ยท ym term
๐ง l(m) term is adaptively set based on mantissa size for optimal accuracy
๐ Benchmarks on the Llama-3.1-8B-Instruct model show L-Mul preserves precision across various NLP tasks, with performance nearly identical to full BFloat16 precision
๐ฌ Authors claim: "We can achieve the same model inference performance while reducing the energy cost of attention computations by 80%."
This breakthrough is still theoretical and would need implementation on dedicated hardware to confirm real-world gains, but itโs a really exciting path for more sustainable AI! ๐ฑ
Read the paper here ๐ย Addition is All You Need for Energy-efficient Language Models (2410.00907)