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Openai/69256df6-133c-8005-ae25-fcf7c8af0f22
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===== - 小規模モデル(数千万〜数億パラメータ)で単ノード学習なら、低レイテンシはそれほど重要ではない。 ===== * 大規模モデル(数十億〜数千億パラメータ)では、GPU間通信の低レイテンシは学習速度に直結するため非常に重要。 * Data Parallel + 大きなバッチサイズなら、帯域の方が重要で、レイテンシの影響は多少緩和される。 💡 補足 * 最近の分散学習ライブラリ(DeepSpeed, Megatron-LM, PyTorch FSDP)は通信の重み付けや圧縮(勾配圧縮、通信オーバーラップ)で低レイテンシの影響をある程度吸収できますが、完全には無視できません。 必要なら、私が「GPU台数・モデルサイズ別に、どれくらいの通信レイテンシまで許容できるか」を表にしてまとめることもできます。作りますか?
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