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Openai/69256df6-133c-8005-ae25-fcf7c8af0f22
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===== - GPU:大規模モデルだと、通信待ちでGPUが空転することがあり、通信圧縮や勾配非同期同期が必要になることも。 ===== * TPU:大規模モデル(数十億〜数千億パラメータ)を複数TPU Podで学習する場合でも、低レイテンシ+高速メモリ転送でスケーラブル。 まとめると: * ノード内通信では TPU と NVIDIA GPU は似たレベル(μs単位)。 * ノード間通信では TPU の方が低レイテンシで、大規模分散学習に有利。 * ただし、GPUは汎用性が高く、TPUはテンソル演算・大規模モデルに特化した設計。 もし希望なら、具体的に TPU v4 Pod と A100 8GPU NVLinkノードでの勾配同期時間の目安も示すことができます。 出しますか?
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