clock grouping in SOC encounter?

[vlsitechnology]

Can anyone explain me the that how can we use clock grouping technique in SOC encounter to optimize the design??

 

[iwpia50s]

Clock grouping is setting a group of leaf cells as a group for FE-CTS to balance the skew. A better definition is skew group. This assures that the insertion delay of the group is within the skew specification.

 

[xinsu]

In cts,clock groups can guide tool to take different clock domain skew into account,so it is only used in this stage,but optdesign have no clock group concept

 

[vlsitechnology]

How can we do it manually if tool doesn't optimize the skew? by using clock grouping