ridge point

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Concepts behind "ridge point"

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🧩 GPU & Accelerator Architecture

Roofline ModelThe roofline plots a kernel's attainable throughput against its arithmetic intensity, FLOPs per byte moved from memory. Below the ridge point (peak FLOPS divided by memory bandwidth, about 295 on an H100 in bf16) a kernel is memory-bound and no amount of clever code reaches the peak; above it, compute is the limit. One picture explains why decode runs at under 1% of peak and why fusion and batching are the two levers that move it.

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