Method and system for power estimation based on a number of signal changes

摘要

In a power estimator, a power coefficient-calculating section acquires an average value of the number of signal changes per unit time in each circuit range to thereby calculate a power coefficient for each circuit range or calculate a power coefficient for each circuit range when the average value of the number of signal changes per unit time is equal to 1, a correction coefficient-calculating section calculates a ratio of an average value of the number of signal changes per unit time at signal lines included in the circuit range to an average value of the number of signal changes per unit time at observing points designated in the circuit range, as a correction coefficient, and a power value-calculating section calculates a power value for each circuit range based on the correction coefficient and the power coefficient calculated for each circuit range.

主权项

1. A computer, comprising a power estimator, wherein the power estimator comprises:
a power coefficient-calculating unit configured to calculate a power coefficient which indicates a first power value in each of a plurality of circuit ranges which do not include a clock tree when a first average value of a number of signal changes per unit time is a first value or equal to 1; and a power value-calculating unit configured to calculate a second power value for each of the plurality of circuit ranges based on the power coefficient and a second average value of the number of signal changes per unit time at observing points which are fewer than signal lines included in each of the plurality of circuit ranges.