[求助]如何使用critical range?

jiming

DC user guide中的8-38處有一個例子：

For example, if the critical range is 2.0ns and the worst violator has a delay of 10.0ns, Design Compiler optimizes all paths that have a delay between 8.0ns and 10.0ns.

請問各位高手， 8.0ns 和 10.0ns 是怎麼計算出來的？

trick660

意思是說
) w" q6 T- a8 c; R; W# s; J如果path group內worst violator的path delay = 10ns
而你的critical_range = 2ns的話
5 P. c4 ^1 M. q! S- e9 U那麼DC就會去對該path group內所有path delay落在(10-2 = 8)ns 到 10ns間的path做optimize的動作