Adjusted Peak Performance

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Adjusted Peak Performance

The (simplified) algorithm used to calculate APP consists of the following steps:

Determine how many 64 bit (or better) floating point operations every processor in the system can perform per clock cycle (best case). This is FPO(i).

Determine the clock frequency of every processor. This is F(i).

Choose the weighting factor for each processor: 0.9 for vector processors and 0.3 for non-vector processors. This is W(i).

Calculate the APP for the system as follows: APP = FPO(1) --- F(1) --- W(1) + ... + FPO(n) --- F(n) --- W(n).

The unit of measurement is Weighted TeraFLOPS (WT).

Notes:

Processors without 64 bit (or better) floating point support have an FPO of zero.

The current APP limit is 0.75 WT.

Use the document referenced below (or an updated version) if you need to calculate APP for export purposes. It holds more details and a number of clarifications and exceptions. Also consult a lawyer who specializes in these things.

EXTERNAL LINKS

DUAL-USE LIST - CATEGORY 4 - COMPUTERS