Weighted TeraFLOPS

Weighted TeraFLOPS (WT) is a unit of measurement introduced by the U.S. Department of Commerce's Bureau of Industry and Security to specify Adjusted Peak Performance (APP).

The weighting factor is 0.3 for non-vector processors and 0.9 for vector processors. For example, a PowerPC 750 running at 800MHz would be rated at 0.00072 WT due to being able to execute one floating point instruction per cycle and not having a vector unit.(Question: Shouldn't the value in the above example be 0.00024 WT as it does not have a vector unit? 800 MFlops * 0.3 * 1/1000000 MFlops/TFlops = 0.00024 WT)

Note that only 64 bit (or wider) floating point instructions count.

For the complete formula, please see Adjusted Peak Performance.

External links

* [http://www.gpo.gov/bis/ear/txt/ccl4.txt DUAL-USE LIST - CATEGORY 4 - COMPUTERS]