Files
AstrAI/astrai/extension
ViperEkura 76aa4edc9f perf: skip grad-bias reduce for bias-free linears
- _LinearFp8.backward computed g2.sum(0) unconditionally and dropped it when needs_input_grad[2] was false; now the column-sum only runs when the bias actually requires grad
- saves ~327 reduce kernels per train step on bias-free LLMs (215M GQA: end-to-end 1.08x -> 1.13x vs bf16)
2026-08-26 18:51:18 +08:00
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